JP5247608B2 - Unidirectional rotating damper and hinge mechanism, opening / closing mechanism and range hood provided with the damper - Google Patents

Description

  The present invention relates to a damper having frictional sliding resistance in one direction, a hinge mechanism provided with the damper, an opening / closing mechanism, and a range hood that employs the opening / closing mechanism for a rectifying plate of a smoke suction portion.

  2. Description of the Related Art Conventionally, in kitchens and home kitchens, range hoods are used for the purpose of effectively sucking smoke and discharging smoke when sucking smoke generated from a stove or the like by a ventilator and discharging it outdoors. Generally, a filter is arranged inside the range hood, and is configured to adhere oil in the sucked smoke or the like to suppress oil scattering.

  Since the oil in the smoke adheres to the filter, it is required to replace the filter periodically to prevent the suction power of the range hood from decreasing. Generally, it is located above the cooking utensil. It was forced to take out the dirty filter in the existing range hood and replace it with a new filter.

  In addition, in order to efficiently inhale smoke into the range hood, when a configuration in which a rectifying plate is arranged at the opening of the range hood is used, it is necessary to remove the rectifying plate and replace the filter. there were.

  When removing the rectifying plate, it was necessary to remove the mounting screw while keeping the rectifying plate fixed to the range hood with the mounting screw from dropping, and it was difficult to work alone. There is also a configuration in which one of the rectifying plates is rotationally supported and the other is attached by fixing means such as mounting screws or fittings. However, when the fixing means is released, it suddenly rotates downward due to its own weight. However, since there is a possibility of hitting the operator, it could not be opened unless the current plate was supported by hand.

  As means for suppressing the speed of the current plate in the opening direction, Patent Document 1 discloses that when the smoke suction part reaches a predetermined distance or more during the opening operation from the closed state to the open state, the opening operation is performed. A configuration is disclosed in which the vehicle is decelerated and the opening operation is stopped and the state is maintained when a predetermined position is reached.

JP 2006-300333 A

  However, the smoke hood described in Patent Document 1 has a torsion spring disposed in the stay so as to decelerate the opening operation when the smoke suction part (the current plate in the present invention) reaches a lower position than a predetermined distance. Therefore, the moment when the smoke suction part is opened, the urging force of the torsion spring is small, so the speed at the time of opening is not reduced. Since the smoke suction part cannot be rotated any more, the opening state cannot be further increased, so that it is difficult for the operator to further increase the degree of opening.

  In this way, since Patent Document 1 has an elastic member such as a torsion spring, the biasing force varies depending on the degree of opening, and when the speed at the time of opening is reduced, the position balanced with its own weight is a position where the degree of opening is small. Therefore, when attempting to increase the degree of opening, the opening speed at the time of opening is not reduced, and there is a risk of hitting the operator, and adjustment of the torsion spring is very difficult.

  The present invention has been made in view of such a situation, and one end face is supported by a hinge mechanism, and the other end face opens a rectifying plate that rotates up and down around the hinge mechanism portion. For example, it is possible to open by its own weight in a decelerated state without opening at a rapid speed, and if necessary, the opening state can be manually adjusted by the operator with the weight of the current plate and the damper resistance. A one-way rotating damper that can be freely adjusted beyond a predetermined position determined by force and that can be closed without causing a resistance force in the closing direction, and a hinge mechanism including the damper Another object is to provide an opening / closing mechanism and a range hood.

  In order to achieve the above object, the present invention is a unidirectional rotating damper, which is formed in a cylindrical shape having an inner peripheral surface and an outer peripheral surface, and rotates in one direction around an axis of an axis passing through the inner peripheral surface. A one-way clutch that allows only one and a cylindrical friction material arranged so as to be in contact with the outer peripheral surface and the inner peripheral surface of the one-way clutch, and the shaft includes a predetermined amount or more in a direction in which the shaft cannot rotate. When a force of more than a predetermined value is applied to the one-way clutch, or when a force greater than a predetermined value is applied to the one-way clutch in a direction in which the shaft cannot rotate, the outer peripheral surface of the one-way clutch and the cylinder One of the inner peripheral surfaces of the friction material slides on the other surface, and one of the one-way clutch and the cylindrical friction material rotates relative to the other.

  And according to this invention, since it can rotate lightly with respect to one rotation direction, and can slide in the state which provided the frictional force with respect to the other rotation direction, in the other rotation direction, it is predetermined. A type of trigger that can be fixed immovably unless an input greater than the applied force is applied, starts moving when a force greater than the friction force determined from the friction coefficient is applied, and rotates only while a force greater than the friction force is applied A one-way rotating damper having a function can be provided.

  The one-way rotation damper may include a tightening member that freely adjusts a contact pressure between the outer circumferential surface of the one-way clutch or the shaft and the inner circumferential surface of the cylindrical friction material. By changing the pressure applied to the sliding surface, the frictional force required for sliding can be set to a desired magnitude.

  In the unidirectional rotating damper, the cylindrical friction material is filled with a metal back metal, a porous bronze sintered layer formed on the surface of the back metal, and a pore and a surface of the porous bronze sintered layer. It is possible to make a multi-layer wound bearing which is made of a synthetic resin composition slip layer and wound in a cylindrical shape with the slip layer inside. According to this, it is possible to exert an appropriate frictional force with the outer peripheral surface of the one-way clutch while ensuring the strength required for the cylindrical friction material.

  Moreover, this invention is a hinge mechanism, Comprising: The 1st direction rotation damper in any one of the above-mentioned, The 1st member connected with the said axis | shaft, and the 2nd member connected with this 1 direction rotation damper The hinge function is exhibited between the two. According to this hinge mechanism, as described above, it can be rotated lightly in one rotation direction, and can be fixed immovably unless an input of a predetermined working force or more is applied in the other rotation direction. It is possible to provide a hinge mechanism having features such as

  Furthermore, the present invention is an opening / closing mechanism including the hinge mechanism, wherein one of the first and second members includes a mounting portion for an opening / closing object.

  According to this opening / closing mechanism, similarly to the above-described invention, the object to be opened / closed can be easily rotated in one rotation direction, and the resistance force generated by the frictional force in the other rotation direction. It can be rotated while exhibiting. Also, when using gravity in the direction of the external force acting in the other rotational direction, the rotational force due to the downward rotational moment caused by the weight of the object to be opened and closed, and the frictional force between the cylindrical friction member and the one-way clutch Since the rotation of the one-way clutch can be stopped at a position balanced with the other, the friction force applied to the friction surface is set to a predetermined value in advance, so that the other rotating through the friction force applying mechanism Can be set to a desired angle.

  Moreover, this invention is a range hood, Comprising: The said opening / closing mechanism is provided, The said opening / closing target object is a baffle plate, It is characterized by the above-mentioned. According to this range hood, when opening the baffle plate, it can be opened by its own weight in a state where it is decelerated without opening at a rapid speed, and if necessary, the operator manually The opening state can be freely adjusted to a predetermined position or more determined by the weight of the rectifying plate and the damper resistance force, and in the operation in the closing direction, the closing operation can be performed without generating a resistance force.

  As described above, according to the present invention, it is possible to open by its own weight in a state of being decelerated without opening at a rapid speed, and the operator can manually change the opening state manually if necessary. A unidirectional rotating damper that can be freely adjusted to a predetermined position or more determined by the weight of the current plate and the damper resistance force, and that can be closed without causing a resistance force in the operation in the closing direction, and A hinge mechanism, an opening / closing mechanism, and a range hood provided with the damper can be provided.

It is a figure which shows 1st Embodiment of the opening / closing mechanism provided with the one-way | direction rotation damper (or hinge mechanism) concerning this invention, Comprising: (a) is a disassembled perspective view, (b) is a perspective view which shows an apparatus side assembly. FIG. 4C is a perspective view showing the door side assembly. It is operation | movement explanatory drawing at the time of utilizing the opening-and-closing mechanism of FIG. 1 for opening and closing of the baffle plate of a range hood. It is a figure for demonstrating operation | movement of the opening-and-closing mechanism in the range hood of FIG. It is a figure which shows 2nd Embodiment of the opening / closing mechanism provided with the one-way | direction rotation damper (or hinge mechanism) concerning this invention, Comprising: (a) is a disassembled perspective view, (b) is a perspective view which shows an apparatus side assembly. FIG. 4C is a perspective view showing the door side assembly.

  Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a first embodiment of an opening / closing mechanism provided with a one-way rotating damper (or hinge mechanism) according to the present invention. The opening / closing mechanism 1 is roughly divided into a first bracket 2 and a frictional force applying mechanism. It comprises a bearing 6 that functions as a friction material, a one-way clutch 7, a torque shaft 8, a second bracket 9, and the like.

  The 1st bracket 2 is provided with the attaching part 2a to an apparatus, a building, etc., and the bearing accommodating part 2b, and the bearing 6 is accommodated in the bearing accommodating part 2b.

  The bearing 6 includes a metal back metal, a porous bronze sintered layer formed on the surface of the back metal, a pore of the porous bronze sintered layer, and a sliding layer of a synthetic resin composition filled and coated on the surface. A multi-layer wound bearing wound in a cylindrical shape with the sliding layer inside. The bearing 6 is accommodated in the bearing accommodating portion 2 b, and the one-way clutch 7 and the like are accommodated therein, and a tightening force is applied by the bolt 3 and the nut 4.

  The one-way clutch 7 is formed in a cylindrical shape having an inner peripheral surface and an outer peripheral surface, and allows only one-way rotation around the axis of the small diameter portion 8b of the torque shaft 8 inserted through the inner peripheral surface. For example, the roller interposed between the inner peripheral surface and the outer peripheral surface is configured to function as a wedge. There are various one-way clutches 7 having various configurations. However, as described above, the one-way clutch 7 is used as long as it allows rotation of the shaft passing through the inner peripheral surface only in one direction. be able to.

  The torque shaft 8 includes small diameter portions 8b and 8c on both sides of the large diameter portion 8a, and the small diameter portion 8b is accommodated in the through hole of the one-way clutch 7 as described above.

  The second bracket 9 includes a circular opening 9b in a rectangular plate-shaped base 9a, and includes a mounting portion 9c for a door or the like on the back surface of the base 9a. The second bracket 9 and the torque shaft 8 are connected by inserting the large diameter portion 8a of the torque shaft 8 into the opening 9b of the second bracket 9, but the torque shaft 8 is connected to the inner side of the second bracket 9. In order to prevent the rotation, serration is applied to the wall surface of the opening 9b and the outer peripheral surface of the large-diameter portion 8a.

  Next, the assembling procedure of the above parts will be described.

  The small-diameter portion 8b of the torque shaft 8 is inserted and fixed in the one-way clutch 7, and the one-way clutch 7 is inserted into the bearing 6, and the bearing 6 is inserted into the bearing housing portion 2b of the first bracket 2, and the bearing housing portion 2b is inserted. By tightening with the bolt 3 and the nut 4, the apparatus-side assembly 10 is completed as shown in FIG. On the other hand, as shown in FIG.1 (c), the 2nd bracket 9 becomes the door side assembly 11 as it is.

  Next, the case where the said apparatus side assembly 10 and the door side assembly 11 are used for opening and closing of the current plate of a range hood is demonstrated, referring FIG.2 and FIG.3.

  The range hood 31 shown in FIG. 2 includes a rectifying plate 33 at the lower part of the main body 32 and an exhaust duct 34 at the upper part. As shown in FIG. 2A, the apparatus side assembly 10 shown in FIG. 1 is fixed to the lower portion of the main body 32, and the apparatus side assembly 10 and the door side assembly 11 are combined. The left end portion of the current plate 33 is fixed to the mounting portion 9c.

  As shown in FIG. 3, in the opening / closing mechanism 1, the torque shaft 8 is allowed to rotate only in the arrow B direction due to the action of the one-way clutch 7, and cannot rotate in the opposite direction. In addition, between the one-way clutch 7 and the bearing 6, the movement of both is restricted by a friction force applying mechanism constituted by their contact surfaces, and unless an input greater than a predetermined acting force works in the direction of arrow A, The torque shaft 8 and the one-way clutch 7 are fixed to the bearing 6 so as not to move. When an input greater than a predetermined acting force acts in the direction of arrow A, the outer peripheral surface of the one-way clutch 7 slides on the inner peripheral surface of the bearing 6, and the torque shaft 8 and the one-way clutch 7 are integrated. Rotate in the direction of arrow A.

  When the current plate 33 is opened from the state shown in FIG. 2A, when the current plate 33 is rotated in the direction of arrow A, the torque shaft 8 and the one-way clutch 7 do not rotate at first. Is not opened, but if an input exceeding a predetermined acting force is applied, the outer peripheral surface of the one-way clutch 7 slides on the inner peripheral surface of the bearing 6, and the torque shaft 8 and the one-way clutch 7 rotate. Along with this, the second bracket 9 rotates, and as a result, the current plate 33 can be rotated in the direction of arrow A to open the current plate 33.

  Here, in the apparatus-side assembly 10, as shown in FIG. 1, the contact pressure between the outer peripheral surface of the one-way clutch 7 and the inner peripheral surface of the bearing 6 can be freely adjusted using bolts 3 and nuts 4. Therefore, the tightening force by the bolt 3 and the nut 4 is appropriately adjusted according to the surface material and surface condition of the one-way clutch 7 and the bearing 6, and the pressure applied to the friction sliding surface is changed, so that the frictional force required for sliding is achieved. Can be set to a desired size. At this time, since the gap at the joint of the bearing 6 is reduced, in other words, the bearing 6 can be reduced in diameter, the force tightened by the tightening member acts as a contact pressure with the outer peripheral surface of the one-way clutch 7 without waste. .

  Returning to FIG. 2, when the rectifying plate 33 reaches a desired position, if the input to the rectifying plate 33 is weakened, the one-way clutch 7 is slid by the frictional force applying mechanism including the one-way clutch 7 and the bearing 6. Therefore, the rotation of the current plate 33 is stopped, and the current plate 33 can be stopped at a desired position. When the rectifying plate 33 is stopped, the rectifying plate 33 can be maintained in a stopped state without further lowering or rising due to the frictional force between the one-way clutch 7 and the bearing 6. Further, as shown in FIG. 3, when the joint position of the bearing 6 is matched with the fastening allowance position of the bearing housing portion 2b, which is a fastening member, the diameter of the bearing 6 can be easily reduced. The applied force can be applied more efficiently as contact pressure with the outer peripheral surface of the one-way clutch 7.

  Next, when closing the rectifying plate 33, when the rectifying plate 33 is rotated in the direction of arrow B in FIG. 2C, the torque shaft 8 is moved by the function of the one-way clutch 7 in the door side assembly 11. Since it can rotate in the arrow B direction (see FIG. 3), the current plate 33 can be rotated and closed with a slight force.

  In the opening / closing mechanism 1, gravity is used to balance the rotational force caused by the downward rotational moment generated by the weight of the rectifying plate 33 and the frictional force between the one-way clutch 7 and the bearing 6. Since the rotation of the torque shaft 8 and the one-way clutch 7 can be stopped, by setting the frictional force to a predetermined value in advance, the rotation angle of the rectifying plate 33 that rotates via the frictional force applying mechanism is set. It can be set to a desired angle. In other words, the opening degree of the rectifying plate 33 can be adjusted to a desired position.

  In addition, in the range hood 31 shown in FIG. 2, the apparatus side assembly 10 is attached to the main body 32 and the door side assembly 11 is attached to the current plate 33, but the apparatus side assembly 10 and the door side assembly 11 The position may be reversed, the door side assembly 11 may be attached to the main body 32, and the apparatus side assembly 10 may be attached to the current plate 33.

  Next, a second embodiment of the opening / closing mechanism provided with the unidirectional rotating damper (or hinge mechanism) according to the present invention will be described with reference to FIG.

  The opening / closing mechanism 41 is roughly composed of a first bracket 42, a bearing 46 that functions as a friction material of the frictional force applying mechanism, a one-way clutch 47, a torque shaft 48, a second bracket 49, and the like.

  The 1st bracket 42 is provided with the attaching part 42a to an apparatus, a building, etc., and the bearing accommodating part 42b, and the bearing 46 is accommodated in the bearing accommodating part 42b.

  The bearing 46 is configured in the same manner as the bearing 6 shown in FIG. 1, and a shaft portion 48 a of the torque shaft 48 is accommodated inside thereof, and a tightening force is applied by the bolt 43 and the nut 44.

  The one-way clutch 47 is configured in the same manner as the one-way clutch 7 shown in FIG. 2 and is fixed to the central portion of the torque shaft 48 in the present embodiment.

  As described above, the torque shaft 48 is accommodated in the through hole of the one-way clutch 47, the left shaft portion 48 a of the one-way clutch 47 is accommodated in the bearing 46, and the shaft portion 48 a and the bearing 46 are in contact with each other. A frictional force applying mechanism is constituted by the surface.

  The second bracket 49 has a circular opening 49b in a rectangular plate-like base 49a, and includes a mounting portion 49c for a door or the like on the back of the base 49a. The one-way clutch 47 is inserted into the opening 49 b of the second bracket 49 to connect the second bracket 49 and the one-way clutch 47, but the one-way clutch 47 rotates inside the second bracket 49. In order to prevent this, serration is applied to the wall surface of the opening 49 b and the outer peripheral surface of the one-way clutch 47.

  Next, the assembling procedure of the above parts will be described.

  The one-way clutch 47 is inserted and fixed at the center of the torque shaft 48, the shaft portion 48a of the torque shaft 48 is inserted into the bearing 46, the bearing 46 is inserted into the bearing housing portion 42b of the first bracket 42, and the bearing housing portion 42b. As shown in FIG. 4B, the device side assembly 50 is completed. On the other hand, as shown in FIG. 4C, the second bracket 49 becomes the door-side assembly 51 as it is.

  By using these device-side assembly 50 and door-side assembly 51 in place of the device-side assembly 10 and the door-side assembly 11 of FIG. 2, the current plate of the range hood can be similarly opened and closed. That is, the direction in which the torque shaft 48 cannot rotate due to the action of the one-way clutch 47 is defined as direction A in FIG. Thus, the rectifying plate 33 of the range hood 31 can be opened and closed as in the case of using the opening and closing mechanism 1 of FIG.

  In the present embodiment, the positions of the apparatus-side assembly 50 and the door-side assembly 51 are reversed, the door-side assembly 51 is attached to the main body 32, and the apparatus-side assembly 50 is attached to the rectifying plate 33. Good.

  Moreover, in the said embodiment, although the cylindrical friction material used for a frictional force provision mechanism was comprised by the bearings (multilayer winding bearing) 6 and 46 which have a joint, it is a cylindrical friction material which takes another structure. Any configuration may be used as long as the pressure from the outer peripheral direction can be reduced by the tightening member so that it acts on the outer peripheral surface of the small diameter portion 8b and the shaft portion 48a of the torque shafts 8 and 48 without waste. Specifically, even if it is a cylindrical friction member having a configuration in which a plurality of slits are provided in the axial direction to reduce the diameter, it is a cylindrical friction member using a mesh structure, for example, a member made of an extended metal. Also good.

  Moreover, it can replace with the structure which clamps the cylindrical friction material used for a frictional force provision mechanism with a fastening member, and can also use it as a state suitable for friction sliding by the inner peripheral surface itself of a fastening member. Specifically, the inner peripheral surface of the fastening member is coated or baked with a resin suitable for friction sliding, or the inner peripheral surface of the fastening member is embedded with a member suitable for friction sliding such as a solid lubricant. Further, the fastening member itself may be made of an alloy suitable for frictional sliding, a sintered alloy, or a resin.

DESCRIPTION OF SYMBOLS 1 Opening / closing mechanism 2 1st bracket 2a Attachment part 2b Bearing accommodating part 3 Bolt 4 Nut 6 Bearing 7 One-way clutch 8 Torque shaft 8a Large diameter part 8b Small diameter part 9 Second bracket 9a Base part 9b Opening part 9c Attachment part 10 Device side group Three-dimensional 11 Door side assembly 31 Range hood 32 Main body 33 Current plate 34 Exhaust duct 41 Opening / closing mechanism 42 First bracket 42a Mounting portion 42b Bearing housing portion 43 Bolt 44 Nut 46 Bearing 47 One-way clutch 48 Torque shaft 48a Shaft portion 49 Second Bracket 49a Base portion 49b Opening portion 49c Mounting portion 50 Device side assembly 51 Door side assembly

Claims (6)

A one-way clutch that is formed in a cylindrical shape having an inner peripheral surface and an outer peripheral surface, and that allows only one-way rotation around the axis of a shaft that passes through the inner peripheral surface;
A cylindrical friction material arranged to contact the outer peripheral surface and the inner peripheral surface of the one-way clutch,
When a predetermined force is applied to the shaft in a direction in which the shaft cannot rotate, or a predetermined force is applied to the one-way clutch to rotate the shaft in a direction in which the shaft cannot rotate. One of the outer peripheral surface of the one-way clutch and the inner peripheral surface of the cylindrical friction material slides on the other surface, and one of the one-way clutch and the cylindrical friction material is relative to the other. Unidirectional rotating damper characterized in that it rotates continuously. The unidirectional rotating damper according to claim 1, further comprising a fastening member that freely adjusts a contact pressure between an outer peripheral surface of the one-way clutch or the shaft and an inner peripheral surface of the cylindrical friction material. The cylindrical friction material is made of a metal back metal, a porous bronze sintered layer formed on the surface of the back metal, a pore of the porous bronze sintered layer, and a synthetic resin composition filled and coated on the surface. It consists of a sliding layer, unidirectional rotary damper according to claim 1 or 2 characterized in that it is a multi-layer wound bearings are wound into a cylindrical shape by the sliding layer on the inside. A unidirectional rotating damper according to claim 1 , 2 or 3 , which exhibits a hinge function between a first member connected to the shaft and a second member connected to the unidirectional rotating damper. A hinge mechanism characterized in that An opening / closing mechanism comprising the hinge mechanism according to claim 4 , wherein either one of the first and second members includes an attachment portion to an opening / closing object. A range hood comprising the opening / closing mechanism according to claim 5 , wherein the opening / closing object is a current plate.

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