JP2006097729A - Damper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure the holding of the standing state of lids with respect to a main body and secure braking when the lids turn to the main body for a long time. <P>SOLUTION: This damper device is provided with a first shaft 20 held so as to be turnable in a case 10 attached to the main body and having a hole 10a and turning integrally with the lids and a first cushion 30 fixed to the outer peripheral face of the first shaft 20 so as to prevent its turn, fitted and inserted so as to be turnable into the hole 10a, and made of substantially cylindrical elastic materials having different outside diameters. An inward facing projecting part 13 and a first stopper wall face 102 are formed on the inner peripheral face of the hole 10a. A first outward facing projecting part 32 and a first gradually changing action face 33 adjacent to it are formed on an outer peripheral face of the first cushion 30 having a comparatively large outside diameter. A first stopper outward facing projecting part 101 and a first stopper circular arc outer peripheral face 105 adjacent to it are formed on an outer peripheral face having a comparatively small outside diameter. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a damper device, and more particularly to a damper that performs a braking action by slowing the tilting speed of a lid when the main body part is closed from an open state in which the lid that can be opened and closed is raised due to tilting by its own weight. Relates to the device.

  The damper device of the present invention can be suitably used for a toilet device for a toilet seat or a toilet lid, for example.

  As is well known, when a toilet seat (lids) attached to the toilet bowl (main body) so that it can be flattened is closed from its upright position by tilting due to its own weight, the toilet seat collides with the toilet bowl, causing noise, etc. In order to prevent the occurrence of this, a damper device has been conventionally provided that performs a buffering action by slowing the tilting speed of the tilting toilet seat.

  And as such a damper device, the cross section of the cam member provided integrally with the toilet seat is a umbilical type, and its three apexes are fitted to the holes of the boss member on the toilet bowl so as to be slidably rotatable, There are known ones that maintain the standing position of the toilet seat with respect to the toilet and ensure braking when the seat is rotated with respect to the toilet (for example, see Patent Document 1).

Moreover, a lid opening / closing device using a rotational resistance by a viscous fluid such as oil is known in a rice cooker (see Patent Document 2).
Japanese Patent Laid-Open No. 2001-37678 JP-A-8-246742

  However, in order to achieve both the maintenance of the standing position of the toilet seat relative to the toilet and the securing of braking when the toilet seat rotates relative to the toilet, the inner circumference of the hole of the boss member that is in sliding contact with the three apexes of the cam member The surface must be formed in a special shape.

  However, in consideration of accuracy control, the cam member having three vertex portions and the boss member having a hole on the inner peripheral surface that is in sliding contact with the three vertex portions are stopped at a desired position only by adjusting the sliding frictional force. Further, it is extremely difficult to maintain the gap between the cam member and the boss member so as to stop at a desired position for a longer period of time, and it is actually very difficult to manufacture a damper device having such a configuration.

  The present invention has been made in view of the above circumstances, and with a simple configuration, for a long period of time, maintaining both the standing position of the lid with respect to the main body and ensuring braking when the lid is rotated with respect to the main body. It is a technical problem to be solved to provide a damper device that can be achieved.

The invention of claim 1 made to solve the above-mentioned problem is that when the first lid and the second lid capable of opening and closing the main body portion are each in the closed state due to tilting by their own weight from the open state in which they stand up. In a damper device that acts as a buffer by slowing the tilting speed of the first lid and the second lid,
A case that is non-rotatably attached to the main body and has a hole with a substantially circular inner peripheral surface, and is non-rotatably attached to the first lid and rotatable to the case A first shaft that is held and rotated integrally with the first lid, and is fixed to the outer periphery of the first shaft so as not to rotate and is rotatably inserted into the hole of the case. A first cushion made of an elastic material formed of a plurality of steps having a substantially cylindrical outer diameter and a second cushion which is non-rotatably attached to the second lids and is rotatably held by the case. A second shaft that rotates integrally with the lids, and a substantially cylindrical outer member that is non-rotatably fixed to the outer periphery of the second shaft and is rotatably fitted in the hole of the case. A second cushion made of an elastic material formed of a plurality of stages having different diameters. It is to have a damper device according to claim.

In solving the above problem, as in claim 2,
In the damper device that acts as a buffer by slowing the tilting speed of the lids when the lids capable of opening and closing the main body part are closed due to tilting by their own weight from the standing open state,
A case having a hole with a substantially circular inner peripheral surface attached non-rotatably to the main body, and non-rotatably attached to the lids and rotatably held in the case A shaft that rotates integrally with the lid, and a substantially cylindrical outer diameter that is non-rotatably fixed to the outer periphery of the shaft and that is rotatably fitted in the hole of the case. With a cushion made of elastic material formed in different stages,
The case has an inward projecting portion projecting radially inward and a stopper wall surface on the inner peripheral surface of the hole portion, while the cushion projects outward in a radially outward direction at a step portion having a relatively large outer diameter. Adjacent to the protrusion and the outward protrusion, a gradually changing action surface whose outer diameter gradually changes in the circumferential direction, and a stopper outward protrusion that protrudes radially outward at a step having a relatively small outer diameter And a damper device characterized in that each of the outer peripheral surfaces has an arc-shaped stopper arc outer peripheral surface adjacent to the stopper outward projection.

In solving the above technical problem, as in claim 3,
When the first lid and the second lid capable of opening and closing the main body part are each closed from the standing open state due to tilting by their own weight, the tilting speed of the first lid and the second lid is slowed down. In the damper device that acts as a buffer,
A case that is non-rotatably attached to the main body and has a hole with a substantially circular inner peripheral surface, and is non-rotatably attached to the first lid and rotatable to the case A first shaft formed of a plurality of steps having different outer diameters that are held and rotated integrally with the first lids, and a longitudinal direction of the shaft on the outer periphery of the step side of the first shaft having a relatively large outer diameter A first stopper projection formed in a projecting shape along the outer periphery of the first shaft, and is fixed to the outer peripheral surface of the step side of the first shaft having a relatively small outer diameter so as not to rotate and pivots into the hole of the case A first cushion made of a substantially cylindrical elastic material, inserted in a possible manner;
A second shaft formed in a plurality of stages having different outer diameters, which is non-rotatably attached to the second lids and is rotatably held in the case and rotates integrally with the second lids; A second stopper projection formed on the outer periphery of the step side of the second shaft having a relatively large outer diameter along the longitudinal direction of the shaft; and a step side of the step side of the second shaft having a relatively small outer diameter. A second cushion made of a substantially cylindrical elastic material fixed to the outer peripheral surface in a non-rotatable manner and rotatably fitted in the hole of the case;
Further, the case has an inward protruding portion protruding radially inward and a first stopper wall surface and a second stopper wall surface on the inner peripheral surface of the hole portion, respectively, while the first cushion protrudes radially outward. A first outwardly projecting portion and a first gradually changing action surface whose diameter gradually changes in the circumferential direction adjacent to the first outwardly projecting portion, and on the step side of the first shaft having a relatively large outer diameter; A first stopper made of a plate-like elastic material is disposed on a side surface of the first stopper wall surface in a gap having a constant interval formed between the outer peripheral surface and the inner peripheral surface of the hole portion facing the outer peripheral surface. The second cushion has a second outward projecting portion protruding radially outward and a diameter gradually changing in the circumferential direction adjacent to the second outward projecting portion. It has a gradual change acting surface on the outer peripheral surface and the ratio of the second shaft A second stopper made of a plate-like elastic material is placed in the gap having a constant interval formed between the outer peripheral surface on the step side having a relatively large outer diameter and the inner peripheral surface of the opposed hole. (2) The damper device is characterized in that the stopper device is disposed so as to be in contact with the side surface in the rotational direction of the wall surface of the stopper.

In solving the above technical problem, as in claim 4,
In the damper device that acts as a buffer by slowing the tilting speed of the lids when the lids capable of opening and closing the main body part are closed due to tilting by their own weight from the standing open state,
A case having a hole with a substantially circular inner peripheral surface attached non-rotatably to the main body, and non-rotatably attached to the lids and rotatably held in the case The shaft is formed in a plurality of steps with different outer diameters that rotate integrally with the lids, and is formed in a protruding shape along the longitudinal direction of the shaft on the outer periphery of the shaft with a relatively large outer diameter. A substantially cylindrical elastic member that is fixed to the outer peripheral surface of the stepped side of the shaft having a relatively small outer diameter and is rotatably inserted into the hole of the case. With cushions made of materials,
Further, the case has an inward projecting portion projecting radially inward and a stopper wall surface on the inner peripheral surface of the hole portion, while the cushion has an outward projecting portion projecting radially outward and the outward projecting portion. An outer peripheral surface on the step side having a relatively large outer diameter of the shaft and an inner peripheral surface of the hole facing the outer peripheral surface; The damper device is characterized in that a stopper made of a plate-like elastic material is interposed in the gap having a constant interval so as to abut against the side surface of the stopper wall surface. It is.

In solving the above technical problem, as in claim 5,
Each stopper including the first stopper and the second stopper is preferably formed of an elastic material having excellent permanent distortion characteristics such as silicone rubber.

According to the invention of claim 1 or claim 2,
When the lid stands up and is in the open state, an inward projection protruding from the inner peripheral surface of the hole of the case that is non-rotatably attached to the main body, and a shaft that rotates integrally with the lid Engaging with the outward projections protruding from the outer peripheral surface of the cushion portion fixed to the outer peripheral surface so as not to rotate, it is possible to securely hold the lid with respect to the main body portion and A stopper wall surface projecting from the inner peripheral surface of the hole portion of the case that is non-rotatably mounted, and a stopper outward projection formed on the outer peripheral surface of the shaft that rotates integrally with the lid, the lid It is opposed in the circumferential direction so as to have a rotation angle of the shaft that can be rotated to the closed state.

  When the lids in the open state are closed by tilting due to their own weight, the inwardly projecting portion is slidably contacted with the rotating gradually changing action surface formed on the outer peripheral surface of the cushion. When the gradual change action surface of the cushion is compressed and deformed, the stopper outward projection portion made of an elastic material formed on the outer peripheral surface of the shaft in the vicinity of the closed state has a good cushioning action of rotation. 1 Abutting on the wall surface of the stopper also achieves a restricting effect of good rotation.

  As a result, when the lids remain closed for a long time, the amount of deformation of the cushion is maximized, so that the material constituting the cushion sags and the sliding contact force between the inward projection and the gradual change acting surface decreases. Although the buffering action may also be reduced by this, the damper effect against tilting of the lids may be reduced, but even in such a case, there is a stopper outward projection formed of an elastic material formed on the outer peripheral surface of the shaft. Since it can contact the wall surface of the stopper with certainty and achieve a good rotation restricting action, it is possible to satisfactorily prevent the unpleasant collision sound that occurs when the lids collide with the main body over a long period of time. it can.

According to invention of Claim 3 or Claim 4,
A hole in a case that is non-rotatably attached to the main body in a gap having a constant interval formed between the outer peripheral surface on the step side with a relatively large outer diameter of the shaft and the inner peripheral surface of the opposing hole. A plate-shaped stopper made of an elastic material between a stopper wall surface projecting on the inner peripheral surface of the shaft and a stopper outward projection formed on the outer peripheral surface of the shaft that rotates integrally with the lids Is placed in contact with the side surface of the stopper wall surface in the rotation direction, and the stopper outward projection and the stopper wall surface are closed when the lids are rotated toward the closed state. It is provided with a rotation angle in the circumferential direction so that it can be rotated up to.

  As a result, when the lids are tilted from the open state to the closed state, if the lids remain closed for a long time, the amount of deformation of the cushion is maximized, so that the material constituting the cushion sags, Decreasing the sliding contact force between the inward projection and the gradual change acting surface also reduces the buffering effect, which may reduce the damper effect against the tilting of the lids. The formed outward protrusion of the stopper comes into contact with the wall surface of the stopper through a stopper made of an elastic material. By fulfilling the action, unpleasant collision sound generated when the lid collides with the main body can be effectively prevented even more effectively over a long period of time.

According to the invention of claim 5,
Since the stopper is made of an elastic material such as silicone rubber that has excellent permanent strain characteristics, it was formed on the outer peripheral surface of the shaft while selecting the silicone rubber that has the optimum characteristics according to the usage conditions as well as the shape. The stopper outward projection can be made to come into contact with the stopper wall surface in a softer and appropriate state, and the unpleasant collision sound generated when the lid collides with the main body can be softened over a long period of time. Can be well prevented.

  Embodiments according to the present invention will be specifically described below with reference to the drawings.

(First embodiment)
In this embodiment, the present invention is applied to a toilet seat and a toilet lid damper device.

  As shown in FIG. 4, the damper device according to the present embodiment is configured such that when the toilet seat 2 and the toilet lid 3 as lids that can be opened and closed with respect to the toilet bowl 1 are each brought into a closed state by a tilt due to their own weight from an open state. The tilting speed of the toilet seat 2 and the toilet lid 3 is slowed to achieve a buffering action.

  As shown in FIGS. 1, 2, and 3, the damper device includes a synthetic resin (or metal) case 10 and a synthetic resin (or metal) first rotating integrally with the toilet seat 2. 1 shaft 20, a first cushion 30 made of an elastic material such as EPDM (ethylene propylene rubber) fixed to the outer peripheral surface of the first shaft 20 so as not to rotate, and a synthetic resin that rotates integrally with the toilet lid 3. A second shaft 40 made of metal (or made of metal) and a second cushion 50 made of an elastic material such as EPDM fixed to the outer peripheral surface of the second shaft 40 so as not to rotate are provided.

  As shown in FIG. 4, a cover 4 is fixed to the rear upper surface of the toilet 1, and the case 10 is rotated by a bolt (not shown) at either end of the cover 4 in the toilet width direction. It is attached impossible.

  As shown in FIGS. 1 and 2, the case 10 includes a case main body 11 having a hole 10 a having an inner peripheral surface having a substantially circular cross section, and one axial end of the case main body 11 (the left end in FIG. 1). Hereinafter, the case end 12 is fitted and fixed in the same manner.

  A case body-side bearing hole 11a for rotatably holding the first shaft 20 is provided at the other axial end of the case body 11 (the right end in FIG. 1, hereinafter the same). Is provided with a case end side bearing hole 12a for rotatably holding the second shaft 40.

  The first shaft 20 is formed of a tubular member having an outer peripheral surface with a circular cross section, and one end side in the axial direction is inserted into the case 10 and is rotatably held in the case body side bearing hole portion 11a. The side is attached to the hinge part (not shown) of the toilet seat 2 by non-rotating fitting.

  It should be noted that a pair of the first shaft 20 and the fitting inner surface of the toilet seat 2 and the fitting inner surface of the toilet seat 2 are in close contact with each other so as to reliably restrict the relative rotation of the first shaft 20 and the toilet seat 2. Opposite flat surfaces (width of two surfaces, not shown) are respectively formed.

  Further, a case-side annular flange portion 21 projecting in the centrifugal direction is integrally formed on the outer peripheral surface of the first shaft 20 so as to abut against the case body 11 and restrict relative movement in the axial direction with respect to the case 10. .

  The first shaft 20 is made of a substantially cylindrical elastic material (for example, EPDM: ethylene propylene rubber or the like) that is rotatably inserted into the hole 10a of the case 10 on the outer peripheral surface on one axial end side of the first shaft 20. The first cushion 30 is fixed so as not to rotate by fitting or the like.

  The first cushion 30 is formed in two steps having a substantially cylindrical outer diameter, and as shown in FIG. 1, the first cushion 30 has a substantially cylindrical surface having a relatively large outer diameter and a relatively large outer diameter portion 30a. The first cushion small-diameter portion 30b having a substantially cylindrical surface with a small diameter is integrally formed.

  The first cushion 30 is fixed to the outer peripheral surface of the first shaft 20 by an adhesive or the like so as not to rotate, and is not rotatable relative to the first shaft and is not relatively movable in the axial direction.

  As means for fixing the first cushion 30 to the first shaft 20, baking may be employed instead of the adhesive.

  The second shaft 40 has an outer peripheral surface with a circular cross section, and one end side in the axial direction is inserted into the case 10 and is rotatably held in the case end side bearing hole portion 12a. It is attached to a hinge (not shown) of the lid 3 so as not to rotate.

  The fitting outer surface of the second shaft 40 with the toilet lid 3 and the fitting inner surface of the toilet lid 3 are in close contact with each other so as to reliably restrict the relative movement of the second shaft 40 and the toilet lid 3. A pair of opposed flat surfaces (width of two surfaces, not shown) are respectively formed.

  Further, one end in the axial direction of the first shaft 20 abuts on the outer peripheral surface of the second shaft 40, and centrifugal separation is performed to restrict relative movement of the first shaft 20 and the second shaft 40 in the axial direction with respect to the case 10. An annular flange portion 41 protruding in the direction is integrally formed.

  Here, the second shaft 40 has a sliding outer peripheral surface 44 having an outer diameter slightly smaller than the inner diameter of the first shaft 20 on the other axial end side of the annular flange portion 41. 44, the 1st shaft 20 is armored so that relative rotation is possible.

  A substantially cylindrical elastic material (for example, EPDM: ethylene propylene rubber or the like), which is rotatably inserted into the hole 10a of the case body 11 on the outer peripheral surface on the one axial end side of the second shaft 40. The second cushion 50 is fixed so as not to rotate by fitting or the like.

As shown in FIG. 1, the second cushion 50 is formed in two stages having a substantially cylindrical outer diameter and a second cushion large diameter portion 50a having a substantially cylindrical surface having a relatively large outer diameter and a relatively outer diameter. The second cushion 50 is integrally formed with the second cushion 50b having a small and substantially cylindrical surface. The second cushion 50 is non-rotatably fixed to the outer peripheral surface of the second shaft 40 by an adhesive, and is attached to the second shaft. On the other hand, although relative rotation is impossible and relative movement in the axial direction is impossible, as a means for fixing, baking may be employed instead of the adhesive.

  As shown in FIGS. 1, 2, and 3, the inner peripheral surface of the hole 10 a facing the first cushion large diameter portion 30 a is parallel to the axial direction on the inner peripheral surface of the hole 10 a of the case body 11. Inwardly projecting three inward first inward protruding portions 13, 13, 13 projecting radially inwardly are provided at equal intervals in the circumferential direction, and between the first inward protruding portions 13, 13, 13. Further, it is composed of three first arc inner peripheral surfaces 14, 14, 14 having an arc length of a little less than 1/3 of the circumference, excluding the length of the width portion in the circumferential direction of the projection.

  The inner peripheral surface of the hole 10a facing the first cushion small-diameter portion 30b has two inwardly facing first stopper wall surfaces 102, 102 projecting radially inward and parallel to the axial direction. (Excluding at equal intervals in the circumferential direction) and adjacent to each first stopper wall surface 102, 102, approximately 1/2 excluding the length of the width portion in the circumferential direction of the first stopper wall surface 102, 102. It comprises two first stopper arc inner circumferential surfaces 104, 104 having an arc length of slightly less than two rounds.

  The first stopper wall surfaces 102, 102 have surfaces that face each other in the radial direction and have a certain distance from the arc surfaces of the first stopper arc outer peripheral surfaces 105, 105 formed in the first cushion small-diameter portion 30 b. The first stopper wall surface arc inner peripheral surfaces 106 and 106 having an inward arc surface are formed so as to face each other.

  Note that the protrusions 13, 13, 13 and the first stopper wall surfaces 102, 102 formed on the inner peripheral surface of the hole 10a of the case body 11 and parallel to the axial direction are all opposed to the first cushion. The first cushion large-diameter portion 30a and the first cushion small-diameter portion 30b are extended continuously in the axial direction of the case body 11 in correspondence with the axial lengths of the first cushion small-diameter portion 30b and the first cushion small-diameter portion 30b.

  On the outer circumferential surface of the first cushion large-diameter portion 30a, three first outward projecting portions 32, 32, 32 projecting radially outward in parallel with the axial direction are projected at equal intervals in the circumferential direction. The three first gradually changing action surfaces 33, 33, 33 whose diameters gradually change in the circumferential direction adjacent to the first outward projecting portions 32, 32, 32, and the first arc outer peripheral surfaces 35, 35. , 35 are formed.

  The outer diameter of the first gradual change acting surface 33 is the smallest at the boundary with the first outward projecting portion 32, and gradually increases from the smallest portion toward the clockwise direction (arrow W1 direction) in FIG. ing.

  Further, the first cushion large-diameter portion 30a has an outer peripheral surface that is concavo-convexly fitted with the first inwardly protruding portions 13, 13, and 13 that are engaged with the first outwardly protruding portions 32, 32, and 32, respectively. Three first engaging recesses 34, 34, 34 are formed.

  Each of the first gradual change acting surfaces 33, 33, 33 extends in the circumferential direction slightly less than ¼ circumference, and in the remaining range, each of the first arc inner circumferential surfaces 14, 14, 14 and the circle First circular arc outer peripheral surfaces 35, 35, and 35 are formed facing each other with a certain gap in the circumferential direction.

  On the outer peripheral surface of the first cushion small-diameter portion 30b, two first stopper outward projections 101, 101 that are parallel to the axial direction and project radially outward are opposed to each other in the radial direction (at equal intervals in the circumferential direction). ), And adjacent to each of the first stopper outward projections 101, 101, the first stopper wall surface arc inner peripheral surface 106 has an arc diameter smaller than the arc diameter of the two first first Stopper arc outer peripheral surfaces 105 and 105 are formed.

  The first stopper outward projections 101, 101 are arcuate first opposed to the first stopper arc inner peripheral surfaces 104, 104 at a certain interval in the circumferential direction on the outer peripheral surface of the outward projection. When the toilet seat 2 is turned from the open state to the closed state by rotating the first stopper outward projections 101, 101 counterclockwise while having the outer peripheral surfaces 107, 107 of the stopper outward projections, the first The protrusions are formed in such a height that they abut against the side surfaces of the stopper wall surfaces 102 and 102 and restrict the rotation.

  The first stopper arc outer peripheral surfaces 105, 105 are opposed to the first stopper arc inner peripheral surfaces 104, 104 with a relatively large constant interval in the circumferential direction, and the first stopper wall outer peripheral surfaces 106, 106 is formed to face each other with a relatively small constant interval in the circumferential direction so that the first stopper outward projections 101 and 101 do not come into contact with the inner circumferential surface of each arc. Formed.

  The first stopper arc outer peripheral surfaces 105 and 105 are substantially less than half a circle except for the width in the circumferential direction of the first stopper outward projections 101 and 101 projecting parallel to the longitudinal direction of the shaft. The first stopper circular arc outer peripheral surfaces 105 and 105 having a circular arc length are configured.

  Next, a first cushion large-diameter portion 30a having a first outward projecting portion 32, a first gradually changing action surface 33, and a first arc outer peripheral surface 35, and a first cushion having a first stopper outward projecting portion 101. As shown in FIG. 2 and FIG. 3, the relative positional relationship of each part in the circumferential direction of rotation with the small-diameter portion 30 b is such that the first outward projection 32 is the first inward on the case hole 10 a side. When the toilet seat 2 is in the open state by engaging with the protrusion 13, the first stopper outward protrusion 101 rotates counterclockwise and can rotate until it contacts the first stopper wall surface 102. The angle is configured to be approximately 110 degrees, and when the toilet seat 2 in the opened state is moved to the closed state due to tilting due to its own weight or the like, the first stopper outward projection 101 is , Shaft integrally with the first shaft 20 In P around, rotates counterclockwise around the first cushion large diameter portion 30a at the same time as FIG.

  That is, when the toilet seat 2 (or the toilet lid 3) in FIG. 3 is upright and is in the open state, the first stopper outward projection 101 rotates counterclockwise to contact the first stopper wall surface 102. The relative positional relationship between the first stopper outward projection 101 and the first stopper wall surface 102 is configured so that the angle of rotation until contact is approximately 110 degrees with respect to the axis P, and the opening is released. The rotation angle of the toilet seat 2 required when the toilet seat 2 is rotated toward the closed state corresponds to about 110 degrees.

  Further, the second cushion large diameter portion 50a and the second cushion small diameter portion 50b are formed on the outer peripheral surface of the second cushion 50 similarly to the first cushion large diameter portion 30a and the first cushion small diameter portion 30b. The outer peripheral surface of the diameter portion 50a has three second outward projections projecting at equal intervals in the circumferential direction, and the diameter gradually changes in the circumferential direction adjacent to each second outward projection 3 Three second gradual change acting surfaces, three second engaging recesses that are concavo-convexly engaged with the three second inward protruding portions that are engaged with the respective second outward protruding portions, and the circumferential direction Are formed with three second circular arc inner peripheral surfaces formed at equal intervals, and projectingly provided on the outer peripheral surface of the second cushion small-diameter portion 30b in the radial direction (at equal intervals in the circumferential direction). Two second stopper outward projections are formed.

  About the damper apparatus comprised as mentioned above, the site | part comprised by the internal peripheral surface facing the 1st cushion 30a large diameter part of the case hole part 10a, and the 1st cushion large diameter part 30a (or 2nd cushion 50a). The operation of will be described below with reference to FIGS.

  When the toilet seat 2 (or the toilet lid 3) stands up and is in the open state, the first cushion large-diameter portion 30a (or the second cushion) of the case hole 10a in the case 10 that is non-rotatably attached to the toilet 1 50a) and three first inward projections 13, 13, 13 projecting on the inner peripheral surface facing the first shaft 20 (rotating integrally with the toilet seat 2 (or toilet lid 3)). Alternatively, the three first outward projecting portions 32, 32 projecting from the outer peripheral surface of the first cushion large-diameter portion 30a (or the second cushion 50a) fixed to the outer peripheral surface of the first shaft 40) so as not to rotate. , 32 (or the second outward projecting portion) are engaged with each other, so that the standing state of the toilet seat 2 (or the toilet lid 3) with respect to the toilet 1 is securely held (the state shown in FIG. 2).

  When the first cushion large-diameter portion 30 (or the second cushion 50) in the open state is rotated by the tilt due to its own weight and goes to the closed state, that is, the first inward projection 13 (or the first inner portion). The toilet seat 2 (or toilet seat 3) by biasing the toilet seat 2 (or toilet seat 3) in a direction in which the engagement of the first projection portion 32 and the first outward projection portion 32 (or the second outward projection portion) is released. ) Is tilted toward the toilet 1 side, the first shaft 20 (or the second shaft 40) and the first cushion large-diameter portion 30a (or the second cushion large-diameter portion 50a) together with the toilet seat 2 (or the toilet lid 3). Each outwardly projecting portion of the first cushion large diameter portion 30a (or the second cushion large diameter portion 50a) that integrally rotates counterclockwise (arrow W2 direction) and is formed of an elastic material such as EPDM. 32, 32, 3 But the engagement is released over the respective inward projections 13, 13, 13 of the case 10.

  Then, the toilet seat 2 (or toilet seat 3) tilts toward the toilet 1 (or toilet seat 3) due to gravity due to its own weight, but at this time, the EPDM rotates counterclockwise (arrow W2 direction) in FIG. Three first gradually changing surfaces 33, 33, 33 (or second gradually changing surfaces) of the first cushion large diameter portion 30a (or the second cushion large diameter portion 50a) formed of an elastic material such as The three inward projections 13, 13, 13 are in sliding contact with each other.

  Since the outer diameter of the first gradual change acting surfaces 33, 33, 33 (or the second gradual change acting surface) gradually increases in the clockwise direction (arrow W1 direction) in FIG. As the first gradual change acting surfaces 33, 33, 33 (or the second gradual change acting surface) rotate in the counterclockwise direction (arrow W2 direction) in FIG. 2, the inwardly protruding portions 13, 13, 13 and The pressing force and the sliding resistance acting between the first gradually changing action surfaces 33, 33, 33 (or the second gradually changing action surface) are increased.

  In this way, the three first gradually changing action surfaces 33, 33, 33 (or the second gradually changing action) of the first cushion large diameter part 30a (or the second cushion large diameter part 50a) formed of an elastic material such as EPDM. Each surface) compresses and deforms to provide a good buffering effect.

  Due to this good buffering action, when the toilet seat 2 is rotated from the open state to the closed state, the tilting speed of the toilet seat 2 (or valve lid 3) is slowed, and the toilet seat 2 (or toilet seat 3) is attached to the toilet bowl 1. An unpleasant collision sound generated at the time of a collision can be prevented.

  Next, the inner peripheral surface portion of the case hole 10a facing the first cushion small diameter portion 30b (or the second cushion small diameter portion 50b) and the first cushion small diameter portion 30b (or the second cushion small diameter portion 50b) are configured. The effect | action of the site | part made is demonstrated below with reference to FIG.1, FIG.2, FIG.3.

  2, as described above, the three first inward projections 13, 13, 13 projecting from the inner circumferential surface of the case hole 10 a and the outer circumferential surface of the first cushion large-diameter portion 30 a are projected. The toilet seat 2 (or the toilet lid 3) that rotates integrally with the first shaft 20 is raised by the engagement with the three first outward projecting portions 32, 32, 32, and is in the open state. However, when the axial center of the first shaft 20 is P, the first outward projections 32, 32, 32 formed at equal intervals (angle 120) are axially oriented toward the closed state. The first shaft 20 is rotated counterclockwise (arrow W2 direction) around the center P.

  FIG. 3 shows the first cushion small-diameter portion of the case hole 10a when the toilet seat 2 (or the toilet lid 3) that rotates integrally with the first shaft 20 shown in FIG. 30b (or the second cushion small-diameter portion 50b), two first stopper wall surfaces 102, 102 projecting from the inner peripheral surface opposite to the first cushion small-diameter portion 30b, and two pieces projecting from the outer peripheral surface of the first cushion small-diameter portion 30b. The relative positional relationship of the rotation direction with the 1st stopper outward protrusion parts 101 and 101 is shown.

  That is, when the toilet seat 2 (or the toilet lid 3) shown in FIG. 3 is raised and in the open state, the first stopper outward projection 101 rotates counterclockwise and the first stopper wall surface 102 and The relative positional relationship between the first stopper outward projection 101 and the first stopper wall surface 102 is configured so that the rotation angle until the contact is approximately 110 degrees with respect to the axis P. The angle required for turning the toilet seat 2 is about 110 degrees, which is necessary when the opened toilet seat 2 is turned in the closing direction (counterclockwise direction).

  Therefore, with respect to the toilet seat 2 in the opened state, the three first inward projections 13, 13, 13 and the first cushion large diameter portion 30a formed on the inner peripheral surface of the case hole 10a are formed. The engagement with the three first outward projecting portions 32, 32, 32 is released, and the first shaft 20 is integrally rotated around the axis P by tilting due to gravity or the like toward the closed state. When the buffering action is performed by rotating approximately 110 degrees counterclockwise in FIG. 3, the first stopper outward projection 101 formed on the first cushion small-diameter portion 30 b is also the first shaft 20. And simultaneously rotate counterclockwise.

  With this rotation, the angle at which the first stopper outward projection 101 made of an elastic material such as EPDM rotates counterclockwise and contacts the first stopper wall surface 102 is: Since the relative positional relationship is configured to be approximately 110 degrees, similar to the rotation angle of the first cushion small-diameter portion 30b, the first stopper outwards at the end of the buffering action in the first cushion large-diameter portion 30a. The projecting portion also comes into contact with the first stopper wall surface 102, so that the rotation restricting action is performed.

  As described above, according to the present embodiment, the case hole of the case main body 11 is adjusted in accordance with the rotation of the first shaft that urges the toilet seat 2 to tilt the toilet seat 2 toward the toilet 1 and performs a buffering action. The two first stopper outward projections 101, 101 formed on the first cushion small diameter portion 30 b are rotated counterclockwise with respect to the first stopper wall surfaces 102, 102 in the portion 10, so that the toilet seat When the toilet bowl comes close to the closed state, the two first stopper outward projections 101, 101 made of an elastic material come into contact with the first stopper wall surfaces 102, 102, so that a good first Performs the rotation limiting action of the shaft.

  Due to this good rotation limiting action, when the toilet seat 2 is turned from the open state to the closed state, the toilet seat 2 ( Or, an unpleasant collision sound generated when the toilet lid 3) collides with the toilet bowl can be prevented.

  For example, when the toilet seat 2 (or the toilet seat 2) is kept closed for a long period of time, such as when the user travels for a long time, the deformation amount of the first cushion large diameter portion 30a is maximized. There is a possibility that sag may occur in the material of this portion constituting the cushion large diameter portion 30a.

  In this case, when the toilet seat 2 (toilet lid 3) is tilted toward the toilet 1 side, the sliding contact force between the first inward projections 13, 13, 13 and the first gradually changing action surfaces 33, 33, 33 decreases. As a result, even if a damper device is provided, the damper effect against tilting of the toilet seat 2 (toilet 3) may be reduced.

  As a result, the tilting speed increases, and in an extreme case, the sound of the toilet seat 2 (toilet lid 3) colliding with the toilet 1 may be significantly louder than before the first cushion large-diameter portion 30a sags. There is.

  According to the present embodiment, the toilet seat is kept closed for a long time on a long-term trip or the like by the user, and the first gradually changing action surface of the first cushion large diameter portion 30a or the first arc outer peripheral surface is Even when the sagging occurs and the buffering action decreases, when the toilet seat is closed by rotating the first shaft 20, the first stopper outward projection 101 made of an elastic material is inserted into the case hole. By abutting against the first stopper wall surface 102 formed at 10, the rotation is softly stopped so that the buffering action can be maintained over a long period of time, and the collision sound can be reliably mitigated.

  The engagement relationship between the second outward projection formed on the second cushion large diameter portion 50a that rotates integrally with the toilet lid 3, and the inward projection formed in the hole 10a, and the second Since the contact relationship between the second stopper outward projecting portion formed in the cushion large diameter portion 50b and the second stopper wall surface formed in the hole portion 10a is similar in configuration and operation as described above, Description is omitted.

  Further, the raised position where the lids (toilet seat 2 or toilet lid 3) are opened with respect to the main body portion 1 by the engagement of the inwardly protruding portion 13 and the first outwardly protruding portion 32 is held. The inward projection 13 rotates when the lid is tilted toward the main body 1 side toward the closed state by urging the lid in the disengagement direction of the projection. When the first gradual change acting surface 33 is slidably contacted to provide a buffering action, and the lids are rotated by their own weight, the lids are tilted toward the main body 1 side to a position close to the closed state. In one or more damper devices configured to limit the rotation of the lids by contacting the first stopper outward projecting portion 101 with which the first stopper wall surface 102 rotates. However, for each damper device, the same as above Do configuration, because it is in effect, and description thereof is omitted.

(Second embodiment)
In the present embodiment, the first cushion large diameter portion 30a and the first cushion small diameter portion 30b are integrally formed with respect to the first cushion 30 in the first embodiment. The portion 30a and the first cushion small-diameter portion 30b are related to a damper device having a structure formed separately. Hereinafter, the same portions shown in FIGS. These are indicated by the same reference numerals, and basically have the same configuration and function, so that the description thereof will be omitted, and will be specifically described below with a focus on different parts.

As shown in FIGS. 5 and 6, the damper device of this embodiment includes a case 10 having a case hole 10 a and a first shaft small-diameter portion having a relatively small outer diameter that rotates integrally with the toilet seat 2. The first shaft 20 integrally formed with the 20a portion and the first shaft large-diameter portion 20b having a relatively large outer diameter, and a first non-rotatably fixed to the outer peripheral surface of the first shaft small-diameter portion 20a. The cushion large-diameter portion 30a, the separation-type first stopper outward projecting portion 201 formed on the outer peripheral surface of the first shaft large-diameter portion 20b so as to protrude in the radial direction parallel to the axial direction, and the case hole 10a A first stopper 203 interposed between the peripheral surface and the inner peripheral surface of the case hole portion 10a and the inner peripheral surface of the first shaft small diameter portion 20b facing each other with a predetermined distance;
A second shaft 40 formed integrally with a second shaft small diameter portion 40a having a relatively small outer diameter that rotates integrally with the toilet lid 3 and a second shaft large diameter portion 40b having a relatively large outer diameter. And a second cushion large-diameter portion 50a fixed to the outer peripheral surface of the second shaft small-diameter portion 40a so as not to rotate, and an outer peripheral surface of the second shaft large-diameter portion 40b that is parallel to the axial direction and protrudes in the radial direction. In the second shaft large-diameter portion 40b opposed to the separation-type second stopper outward projection 401 formed on the inner peripheral surface of the case hole 10a and the inner peripheral surface of the case hole 10a with a predetermined interval. The damper device includes a second stopper 403 interposed between the peripheral surfaces.

  The case 10 is fitted and fixed to a case main body 11 having a case hole portion 10a having an inner peripheral surface having a substantially circular cross section and one axial end of the case main body 11 (the left end in FIG. 1, the same applies hereinafter). It consists of a case end 12.

  A case body-side bearing hole 11a for rotatably holding the first shaft 20 is provided at the other axial end of the case body 11 (the right end in FIG. 1, hereinafter the same). Is provided with a case end-side bearing hole 12a for rotatably holding the second shaft 40.

  The first shaft 20 has an outer peripheral surface with a circular cross-section having different outer diameters, and has a first shaft small-diameter portion 20a having a relatively small outer diameter and a first shaft large-diameter portion 20b having a relatively large outer diameter. A case body-side bearing hole portion of the case body 11 is formed of a member, and one end side in the axial direction integrally including the first shaft small-diameter portion 20a and the first shaft large-diameter portion 20b is inserted into the case 10 The other end side in the axial direction is attached to the hinge (not shown) of the toilet seat 2 by a non-rotatable fitting.

  The outer peripheral surface of the first shaft small-diameter portion 20a is made of a substantially cylindrical elastic material (for example, EPDM: an elastic body such as ethylene propylene rubber) that is rotatably inserted into the case hole 10a of the case 10. The said 1st cushion large diameter part 30a is being fixed so that rotation is impossible by the fixed fitting etc. which used the adhesive agent and baking.

  The second shaft 40 has an outer peripheral surface with a circular section with different outer diameters, and is formed of a second shaft small diameter portion 40a having a relatively small outer diameter and a second shaft large diameter portion 40b having a relatively large outer diameter. One end in the axial direction is inserted into the case 10 and rotatably held in the case end side bearing hole 12a, and the other end in the axial direction is attached to the hinge (not shown) of the toilet lid 3 so as not to rotate. It has been.

  Further, one end in the axial direction of the first shaft 20 abuts on the outer peripheral surface of the second shaft small diameter portion 40a to restrict relative movement in the axial direction of the first shaft 20 and the second shaft 40 with respect to the case 10. An annular flange portion 41 protruding in the centrifugal direction is integrally formed.

  Here, the second shaft small-diameter portion 40a is formed to have a sliding outer peripheral surface 44 having an outer diameter slightly smaller than the inner diameter of the first shaft 20 on the other axial end side than the annular flange portion 41. The first shaft 20 is externally mounted on the sliding outer peripheral surface 44 so as to be relatively rotatable.

  On the outer peripheral surface of the second shaft small diameter portion 40a, the above-mentioned second material made of a substantially cylindrical elastic material (for example, EPDM: ethylene propylene rubber or the like) rotatably fitted in the case hole 10a of the case 10 is inserted. The two cushion large-diameter portions 50a are fixed so as not to rotate by fitting or the like using an adhesive or baking.

  On the inner peripheral surface of the case hole 10a of the case 10, three inward first inward projections projecting radially inward in parallel to the axial direction are provided on the inner peripheral surface facing the first cushion large diameter portion 30a. Protrusions 13, 13, and 13 are provided at equal intervals in the circumferential direction, and the length of the circumferential width portion of each of the projecting parts is set between the first inwardly projecting parts 13, 13, and 13. Three first circular arc inner peripheral surfaces 14, 14, 14 having an arc length of a little less than 1/3 of the circle are excluded.

  Further, two inwardly separated first stopper wall surfaces 202, 202 projecting inward in the radial direction in parallel to the axial direction are formed on the inner peripheral surface of the case hole 10a facing the first shaft large diameter portion 20b. Projecting oppositely in the radial direction (at equal intervals in the circumferential direction) and adjacent to each separation-type first stopper wall surface 202, 202, the circumference of the separation-type first stopper wall surface 202, 202 Two separable first stopper arc inner peripheral surfaces 204, 204 having an arc length of a little less than half a circle excluding the length of the width portion in the direction are formed.

  The separation-type first stopper wall surfaces 202, 202 have a surface formed so as to face in the radial direction, which is constant with the separation-type first stopper arc outer circumferential surfaces 205, 205 forming the outer circumferential surface of the first shaft large-diameter portion 20b. Arc-shaped separated first stopper wall surface arc inner peripheral surfaces 206 and 206 having inward arc surfaces are formed so as to be opposed to each other.

  The protrusions 13, 13, 13 and the wall surfaces 202, 202 formed on the inner peripheral surface of the hole 10a of the case 10 are all opposed to the first cushion large diameter portion 30a and the first shaft large diameter portion 20b. Corresponding to each axial length, it extends continuously in the axial direction of the case body 11.

  As in the first embodiment, the outer peripheral surface of the first cushion large diameter portion 30a fitted and fixed to the first shaft small diameter portion 20a has three first outer protrusions protruding at equal intervals in the circumferential direction. Direction projections 32, 32, 32, three first gradually changing action surfaces 33, 33, 33 formed at equal intervals in the circumferential direction, and three first members formed at equal intervals in the circumferential direction It is comprised from the joint recessed part 34,34,34 and the three 1st circular arc outer peripheral surfaces 35,35,35 formed in the circumferential direction at equal intervals.

  On the outer peripheral surface of the first shaft large diameter portion 20b, as shown in FIGS. 5 and 6, two separate first stopper outward projections 201, 201 that are parallel to the axial direction and project radially outward. Projecting oppositely in the radial direction (at equal intervals in the circumferential direction), and adjacent to each of the separation-type first stopper outward projections 201, 201, in the separation-type first stopper wall surface arc Two separable first stopper arc outer peripheral surfaces 205 and 205 having an arc diameter smaller than the arc diameter of the peripheral surface 204 are formed.

  The separation-type first stopper outward projections 201, 201 are opposed to the separation-type first stopper arc inner circumferential surfaces 204, 204 on the outer peripheral surface side of the outward projection with a certain interval in the circumferential direction. Arc-shaped separated first stopper outward projections 207 and 207 have outer peripheral surfaces 207 and 207, and the separated first stopper outward projections 201 and 201 together with the first shaft large-diameter portion 20b and the first shaft 20 When the toilet seat 2 is turned from the open state to the closed state by rotating it by a predetermined angle in the counterclockwise direction around the shaft center P, it contacts the side surfaces of the separation type first stopper wall surfaces 202, 202, The projection height is such that the rotation of one shaft 20 can be restricted.

  The separation-type first stopper arc outer peripheral surfaces 205, 205 formed on the first shaft large-diameter portion 20b are in contrast to the separation-type first stopper arc inner peripheral surfaces 204, 204 formed in the case hole 10a. It is formed so as to be opposed with a relatively large constant interval in the circumferential direction, and to be separated from the separation type first stopper wall surface arc inner peripheral surfaces 206, 206 with a relatively small constant interval in the circumferential direction. When the separation-type first stopper outward projections 201 and 201 are rotated together with the first shaft large diameter portion 20b, the arc inner peripheral surfaces are formed so as not to contact each other.

  The outer peripheral surfaces 205 and 205 of the separation-type first stopper arcs except for the length of the width portion in the circumferential direction of the separation-type first stopper outward projections 201 and 201 projecting parallel to the longitudinal direction of the shaft. Thus, two separate first stopper arc outer peripheral surfaces 205 and 205 having an arc length of about ½ circumference are formed.

  The separation-type first stopper is formed in a space formed with a certain distance between the separation-type first stopper arc outer peripheral surfaces 205 and 205 and the separation-type first stopper arc inner circumferential surfaces 204 and 204 facing each other. The arc outer peripheral surface 205 and the separation-type first stopper arc inner circumferential surface 204 have arc-shaped sliding contact surfaces that slide in the circumferential direction, the separation-type first stopper wall surface, and the separation-type first stopper outward projection. A first stopper 203 formed in the shape of a spacer having a planar abutting surface that abuts with each other in the circumferential direction is interposed.

  The first stopper 203 is formed of an elastic material excellent in permanent distortion characteristics, for example, represented by silicone rubber.

  Therefore, the rotation angle of the toilet seat 2 required when the opened toilet seat 2 is rotated in the circumferential direction around the axis P of the first shaft 20 toward the closed state is approximately 110 degrees. Then, when the toilet shaft 2 is closed by rotating the first shaft 20 in the circumferential direction by 110 degrees, the first stopper 203 is circumferentially separated by the separation-type first stopper wall surface and the separation-type first stopper outward projection. Thus, a good buffering action of the toilet seat 2 can be obtained with this compression.

  That is, now, the first stopper 203 is made of, for example, silicone rubber, and slides in the circumferential direction when the first shaft 20 rotates with each of the separation-type first stopper arc outer peripheral surface 205 and the separation-type first stopper arc inner peripheral surface 204. It is assumed that the width of the arcuate sliding contact surface that is in contact is formed to have a width having an angle of about 30 degrees in the circumferential direction around the axis P of the first shaft 20.

  Silicone rubber is particularly excellent in permanent strain characteristics. For example, if it can be compressed and deformed to 1/2, the first shaft 20 is turned counterclockwise around the axis P from the open state of the toilet seat 2 to the closed state. In the case of the first stopper made of silicone rubber, the separation-type first stopper outward projection portion has about 30 before the contact with the separation-type first stopper wall surface by the time when it is turned to the closed state. The rotation can be stopped in a compressed and deformed state from the circumferential width of the angle of about 15 degrees to the circumferential width of the angle of about 15 degrees.

  That is, when the first stopper 203 made of elastic silicone rubber is interposed between the separation-type first stopper wall surface 202 and the separation-type first stopper outward projection 201, the first outward projection 32 and The first gradual change acting surface 33, the first cushion large diameter portion 30a provided with the first arc outer peripheral surface 35, the separation-type first stopper outward projection 201, and the separation-type first stopper arc outer peripheral surface 205 are provided. As shown in FIGS. 2 and 3, the relative phase relationship between the first shaft large-diameter portion 20 b provided in the rotation direction is such that the first outward projection 32 is the first inward projection 13. When the toilet seat 2 is in an open state by engaging the separable first stopper outward projection 201 with respect to the separable first stopper wall surface 202 in a rotation direction of approximately (110 degrees + 15 degrees). Configured to work To have.

  As a result, the engagement of the first outward projection 32 and the first inward projection 13 on the first cushion large diameter portion 30a side is released with respect to the toilet seat 2 in the open state, and the first shaft 20 When rotating toward the closed state counterclockwise around the axis P, the separation-type first stopper outward projection 201 on the first shaft large-diameter portion 20b side also rotates counterclockwise at the same time. As a result, the first cushion large-diameter portion 30a side provides a good buffering action, and at the same time, the first shaft large system part 20b side obtains a good buffering action and a good rotation limiting action at the same time.

  In addition, it forms in the hole 10a, the 2nd outward projection part formed in the 2nd cushion large diameter part 50a rotated integrally with the toilet lid 3, a 2nd gradually changing action surface, and a 2nd circular arc outer peripheral surface. The engagement relationship with the formed second inward projection, the separation type second stopper outward projection formed in the second shaft large diameter portion 50b, and the separation type second stopper formed in the hole 10a. The contact relationship between the wall surface and the second stopper is also the same as described above, and thus the description thereof is omitted.

  Next, the operation of the damper device configured as described above will be specifically described below.

  First, on the first cushion 30a (or second cushion 50a) side, as described in the first embodiment, three first outward projections 32 formed on the outer peripheral surface of the first cushion 30a, and the case hole By engaging with each of the first inward projections 13 formed on the inner peripheral surface 10a, the standing position of the toilet seat 2 with respect to the toilet 1 is securely held, while the inward projection 13 and the first outward projection 32 are provided. When the toilet seat 2 is urged in the release direction and the toilet seat 2 is tilted to the toilet 1 by its own weight, the three first inwardly projecting portions 13, 13, and 13 rotate so as to rotate. The first shaft is satisfactorily buffered by being in sliding contact with the surfaces 33, 33 and 33, respectively.

As a result, when the toilet seat 2 is rotated from the open state to the closed state, the tilting speed of the toilet seat 2 (or the valve lid 3) is slowed down and the toilet seat 2 (or the toilet seat 3) collides with the toilet bowl 1. The unpleasant collision noise which generate | occur | produces can be prevented Next, the effect | action by the side of the 1st shaft large diameter part 20b (or 2nd shaft large diameter part 40b) is demonstrated below by FIG.2, FIG.5, FIG.6. To do.

  First, as described in the first embodiment, FIG. 2 shows the first cushion large-diameter portion 30a having the first outward projection 32 and the inward projection 13 when the toilet seat 2 is in a standing state. It shows the relative positional relationship in the rotation direction with the case hole 10a provided, and includes three inwardly projecting portions 13, 13, 13 and three first outwardly projecting portions 32, 32, 32. Due to the engagement, the toilet seat 2 (or the toilet lid 3) that rotates integrally with the first shaft 20 stands up and is in an open state. From this state toward the closed state, the axis of the first shaft 20 is located. The first shaft 20 provided with the first outward projections 32, 32, 32 formed at equal intervals (angle 120) around P is rotated counterclockwise (arrow W2 direction).

  FIG. 6 shows the first shaft large-diameter portion 20b (or the second shaft) when the toilet seat 2 (or the toilet lid 3) that rotates integrally with the first shaft 20 stands and is in the open state as described above. Shaft large-diameter portion 40b) Two separate first stopper wall surfaces 202, 202 projecting from the inner peripheral surface of the case hole 10a opposite to the outer peripheral surface, and the outer peripheral surface of the first shaft large-diameter portion 20b. The relative relationship of the rotational direction phase between the two separated first stopper outward projections 201, 201 and the separated first stopper arc outer peripheral surfaces 205, 205 are separated. The relative positional relationship of the two 1st stoppers 203 formed with elastic materials, such as silicone, interposed between circular arc inner peripheral surfaces 204 and 204 is shown.

  The two first stoppers 203 are formed of silicone rubber that is excellent in permanent distortion characteristics and is compressed and deformed to about ½, and when the toilet seat 2 (or the toilet lid 3) stands up and is in an open state, The relative positional relationship of the phase in the rotational direction between the two separated first stopper outward projecting portions 201 and 201 projecting from the outer peripheral surface of the first shaft large diameter portion 20b is the separated first stopper. The toilet seat 2 (or the toilet lid 3) is opened in the counterclockwise direction around the axis P of the first shaft 20 with respect to the separation-type first stopper wall surfaces 202, 202. It is arranged so that it can be rotated to the extent that the circumferential width of about 15 degrees after the first stopper 203 is compressed and deformed is added to about 110 degrees of the rotation angle from the end to the closed state. Has been.

  The above-mentioned approximately 110 degrees is an angle required when the opened toilet seat 2 is rotated in the closing direction (counterclockwise direction). It is an angle indicating the size of the width portion length of the sliding contact surface in the circumferential direction around the axis P after being compressed and deformed until the closed state.

  When the toilet seat 2 (or the toilet lid 3) in the open state is now closed and the first shaft 20 is turned counterclockwise, the first seat 20 is fitted and fixed to the first shaft small diameter portion 20a. The engagement between the three inward projections 13, 13, 13 and the three first outward projections 32, 32, 32 formed in the first cushion large diameter portion 30 a is closed, and the closed state Toward this, by tilting due to gravity or the like, the first shaft 20 is rotated integrally with the first shaft 20 around the axis P in the counterclockwise direction of FIG. 3, and formed in the first shaft large diameter portion 20b. The two separation-type first stopper outward projections 201 and 201 also rotate integrally counterclockwise with the first shaft small-diameter portion 20a at the same time in the first direction toward the closed state of the toilet seat 2. Rotate approximately 110 degrees, which is the rotation angle required when interposing a stopper To stop.

  With this rotation, on the first cushion large diameter portion 30a side, as described in the first embodiment, the first cushion large diameter portion 30a (or the second cushion large diameter portion formed of an elastic material such as EPDM) is used. 50a) first gradual change acting surface 33 (or second gradual change acting surface) is compressed and deformed by inward projection 13 to provide a good buffer due to the pressing force acting between them and sliding resistance. Action occurs.

  Due to this good buffering action, when the toilet seat 2 is rotated from the open state to the closed state, the tilting speed of the toilet seat 2 (or valve lid 3) is slowed, and the toilet seat 2 (or toilet seat 3) is attached to the toilet bowl 1. An unpleasant collision sound generated at the time of a collision can be prevented.

  At the same time as this rotation, the first stopper 203 is formed of silicone rubber that is excellent in permanent distortion characteristics such as being compressed and deformed to about ½, so even on the first shaft large diameter portion 20b side, A counterclockwise clock centered on the axis P of the first shaft 20 with the separated first stopper outward projections 201, 201 formed of an elastic material such as EPDM facing the separated first stopper wall surfaces 202, 202. In the direction of rotation, the width of the direction in which the toilet seat 2 is moved from the open state to the closed state is approximately 110 degrees, and the width in the direction of approximately 15 degrees after the first stopper 203 is compressed and deformed is subtracted. When it rotates, it begins to collide with the separation-type first stopper 203 disposed in contact with the separation-type first stopper wall surface 202.

  That is, in the case of the silicone rubber having excellent permanent distortion characteristics as described above, the separation-type first stopper 203 is, for example, the width in the circumferential direction of the sliding contact surface having the arcuate surface shape of the separation-type first stopper 203. Although it is formed in a size of about 30 degrees, if the rotation further proceeds after the collision with the separation-type first stopper 203, the compression / deformation proceeds, and the width portion length in the circumferential direction of the sliding contact surface is substantially halved. The width of the slidable contact surface in the circumferential direction centered on the axis P is compressed and deformed to about 15 degrees. At this time, as the compression and deformation progress, a good buffer against rotation is obtained. In addition to performing the action, a good restriction action on the rotation is performed by the end of the compression / deformation.

  As a result, the tilting speed of the toilet seat 2 (or the valve lid 3) is slowed, and an unpleasant collision sound that occurs when the toilet seat 2 (or the toilet seat 3) collides with the toilet 1 can be prevented. It can be reliably stopped at a predetermined position.

  As described above, according to the present embodiment, the toilet seat is kept closed for a long time during a long-term trip of the user, and the first gradually changing action surface on the first cushion 30a side and the first arc inner peripheral surface. In addition, when the sagging occurs and the buffering action is reduced, the separation-type first stopper outward projection 201 on the one-shaft large-diameter portion 20b side is separated from the separation-type first stopper wall surface 202 and the separation-type first stopper. A separation-type first stopper wall surface 202 formed in the case hole 10a is interposed through a first stopper 203 made of an elastic material having excellent permanent distortion characteristics such as silicone rubber interposed between the outward protrusion 201 and the like. Since the rotation is softly stopped by the contact, the buffering action can be maintained for a long period of time, and the collision noise can be surely reduced.

  In addition, it forms in the hole 10a, the 2nd outward projection part formed in the 2nd cushion large diameter part 50a rotated integrally with the toilet lid 3, a 2nd gradually changing action surface, and a 2nd circular arc outer peripheral surface. Formed in the hole 10a through the second stopper 403 and the separation-type second stopper outward projection 401 formed on the second shaft large diameter portion 50b. The contact relationship with the separated second stopper wall surface 402 is the same as that described above, and the description thereof is omitted.

  Further, the raised position where the lids (toilet seat 2 or toilet lid 3) are opened with respect to the main body portion by the engagement of the inwardly protruding portion 13 and the first outwardly protruding portion 32 is held, and both the protrusions When the toilet seat 2 is tilted toward the main body 1 side by biasing the toilet seat 2 in the disengagement direction of the portion, the inward projection 13 rotates. When the toilet seat 2 is slidably contacted with the gradual change acting surface 33, the toilet seat 2 is provided with a buffering action. When the first stopper 203 is tilted, the rotating outward projection of the first stopper abuts against the first stopper 203 and elastically deforms the first stopper 203 so that the toilet seat 2 can be cushioned and stopped. In one or more damper devices Also, in each of the damper device, the same configuration as above, since the action, description is omitted.

It is a longitudinal cross-sectional view which shows the whole structure of the damper apparatus of 1st Embodiment, and follows the AA line of FIG. 2, and the BB line of FIG. FIG. 2 is a cross-sectional view taken along a line CC in FIG. 1, which is related to the damper device of the first embodiment and is cut at a step portion having a relatively large outer diameter of the first cushion. FIG. 4 is a cross-sectional view taken along a line DD in FIG. 1, which is related to the damper device of the first embodiment and is cut at a step portion having a relatively small outer diameter of the first cushion. It is a side view which shows the toilet bowl with which the damper apparatus of 1st Embodiment is mounted | worn. It is a longitudinal cross-sectional view which shows the whole structure of the damper apparatus of 2nd Embodiment, and follows the AA line of FIG. 2, and the BB line of FIG. FIG. 4 is a cross-sectional view taken along a DD line in FIG. 1, which is related to the damper device of the second embodiment and is cut at a step portion having a relatively large outer diameter of the first shaft.

Explanation of symbols

10 ... Case 10a ... Case hole 11 ... Case body 11a ... Case body side bearing hole 12 ... Case end 12a ... Case end side bearing hole 20 ... First shaft 21 ..Case-side annular flange 30 ... first cushion 30a ... first cushion large diameter part 30b ... first cushion small diameter part 40 ... second shaft 41 ... annular flange part 44 ... sliding Dynamic outer peripheral surface 50 ··· second cushion 50a · · · second cushion large diameter portion 50b · · second cushion small diameter portion 101 · · first stopper outward projection 102 · · first stopper wall surface 105 · · first stopper Arc outer peripheral surface

Claims (5)

When the first lid and the second lid capable of opening and closing the main body part are each closed from the standing open state due to tilting by their own weight, the tilting speed of the first lid and the second lid is slowed down. In the damper device that acts as a buffer,
A case that is non-rotatably attached to the main body and has a hole with a substantially circular inner peripheral surface, and is non-rotatably attached to the first lid and rotatable to the case A first shaft that is held and rotated integrally with the first lid, and is fixed to the outer periphery of the first shaft so as not to rotate and is rotatably inserted into the hole of the case. A first cushion made of an elastic material formed of a plurality of steps having a substantially cylindrical outer diameter and a second cushion which is non-rotatably attached to the second lids and is rotatably held by the case. A second shaft that rotates integrally with the lids, and a substantially cylindrical outer member that is non-rotatably fixed to the outer periphery of the second shaft and is rotatably fitted in the hole of the case. A second cushion made of an elastic material formed of a plurality of stages having different diameters. Damper device characterized in that. In the damper device that acts as a buffer by slowing the tilting speed of the lids when the lids capable of opening and closing the main body part are closed due to tilting by their own weight from the standing open state,
A case having a hole with a substantially circular inner peripheral surface attached non-rotatably to the main body, and non-rotatably attached to the lids and rotatably held in the case A shaft that rotates integrally with the lid, and a substantially cylindrical outer diameter that is non-rotatably fixed to the outer periphery of the shaft and that is rotatably fitted in the hole of the case. With a cushion made of elastic material formed in different stages,
The case has an inward projecting portion projecting radially inward and a stopper wall surface on the inner peripheral surface of the hole portion, while the cushion projects outward in a radially outward direction at a step portion having a relatively large outer diameter. Adjacent to the protrusion and the outward protrusion, a gradually changing action surface whose outer diameter gradually changes in the circumferential direction, and a stopper outward protrusion that protrudes radially outward at a step having a relatively small outer diameter And a damper device having an arcuate stopper arc outer peripheral surface adjacent to the stopper outward projection on the outer peripheral surface. When the first lid and the second lid capable of opening and closing the main body part are each closed from the standing open state due to tilting by their own weight, the tilting speed of the first lid and the second lid is slowed down. In the damper device that acts as a buffer,
A case that is non-rotatably attached to the main body and has a hole with a substantially circular inner peripheral surface, and is non-rotatably attached to the first lid and rotatable to the case A first shaft formed of a plurality of steps having different outer diameters that are held and rotated integrally with the first lids, and a longitudinal direction of the shaft on the outer periphery of the step side of the first shaft having a relatively large outer diameter A first stopper projection formed in a projecting shape along the outer periphery of the first shaft, and is fixed to the outer peripheral surface of the step side of the first shaft having a relatively small outer diameter so as not to rotate and pivots into the hole of the case A first cushion made of a substantially cylindrical elastic material, inserted in a possible manner;
A second shaft formed in a plurality of stages having different outer diameters, which is non-rotatably attached to the second lids and is rotatably held in the case and rotates integrally with the second lids; A second stopper projection formed on the outer periphery of the step side of the second shaft having a relatively large outer diameter along the longitudinal direction of the shaft; and a step side of the step side of the second shaft having a relatively small outer diameter. A second cushion made of a substantially cylindrical elastic material fixed to the outer peripheral surface in a non-rotatable manner and rotatably fitted in the hole of the case;
Further, the case has an inward protruding portion protruding radially inward and a first stopper wall surface and a second stopper wall surface on the inner peripheral surface of the hole portion, respectively, while the first cushion protrudes radially outward. 1. A damper device comprising: a first outward projecting portion and a first gradually changing action surface whose diameter gradually changes in a circumferential direction adjacent to the first outward projecting portion. In the damper device that acts as a buffer by slowing the tilting speed of the lids when the lids capable of opening and closing the main body part are closed due to tilting by their own weight from the standing open state,
A case having a hole with a substantially circular inner peripheral surface attached non-rotatably to the main body, and non-rotatably attached to the lids and rotatably held in the case And a shaft formed in a plurality of steps with different outer diameters that rotate integrally with the lids, and a protrusion formed along the longitudinal direction of the shaft on the outer periphery of the shaft with a relatively large outer diameter. A substantially cylindrical elastic member that is fixed to the outer peripheral surface of the stepped side of the shaft having a relatively small outer diameter and is rotatably inserted into the hole of the case. With cushions made of materials,
Further, the case has an inward projecting portion projecting radially inward and a stopper wall surface on the inner peripheral surface of the hole portion, while the cushion has an outward projecting portion projecting radially outward and the outward projecting portion. An outer peripheral surface on the step side of the shaft having a relatively large outer diameter, and an inner peripheral surface of the hole facing the outer peripheral surface; A damper device characterized in that a stopper made of a plate-like elastic material is interposed in the gap having a constant interval so as to abut against the side surface of the stopper wall surface.   5. The damper device according to claim 3, wherein the first stopper and the second stopper are made of an elastic material having excellent permanent strain characteristics such as silicone rubber.

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