JP2011012750A - One-way rotating damper, hinge mechanism with the damper, opening and closing mechanism and range hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a range hood opened by its own weight in the state of being decelerated but not opened at a rapid speed, capable of manually adjusting an open state by an operator more freely than a prescribed position determined by the weight of a straightening vane and the resisting force of a damper, and capable of being closed without generating the resisting force to a close direction.SOLUTION: The range hood has the one-way rotating damper including one-way clutches 12, 13 and 15 permitting only one-way rotation around an axis of a shaft 11, and a friction force providing mechanism for providing friction force to a non-rotatable direction of the shaft of the one-way clutch and performing frictional sliding to the non-rotatable direction of the shaft. Sliding can be performed in the state of providing the friction force to the non-rotatable direction of the shaft of the one-way clutch through the friction force providing mechanism, and thus, a kind of a trigger function is provided such that, immovable fixing to the non-rotatable direction is possible unless input equal to or more than the prescribed acting force acts, and moving is started when the force equal to or more than the friction force determined by a friction coefficient acts, and rotation is performed only while the friction force acts.

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 in the opening direction of the rectifying plate, Patent Document 1 describes the opening operation when the smoke suction part reaches a predetermined distance or more during the opening operation from the closed state to the open state. 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, Patent Document 1 has a configuration in which a torsion spring is arranged 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. 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. After the weight of the smoke suction part and the elastic force of the torsion spring are balanced, the smoke suction part rotates further. Since the opening state cannot be further increased, it is difficult for the operator to further increase the degree of opening.

  Thus, since Patent Document 1 is provided with an elastic member such as a torsion spring, the biasing force differs depending on the opening condition, and when the speed at the time of opening is reduced, the position that balances with its own weight becomes a position with a small opening condition, If the opening degree is increased, the opening speed at the time of opening is not reduced, and there is a possibility of hitting an operator, and it is very difficult to adjust the torsion spring.

  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. In this case, it can be opened by its own weight while being decelerated 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 the above, and that can be closed without causing a resistance force in the operation in the closing direction, and a hinge mechanism including the damper, The object is to provide an opening / closing mechanism, a range hood, and the like.

  In order to achieve the above object, the present invention provides a one-way rotation damper, which is a one-way clutch that allows only one-way rotation around an axis of a shaft, and a non-rotatable direction of the shaft of the one-way clutch. And a friction force applying mechanism that applies a friction force and frictionally slides the shaft in a non-rotatable direction.

  And according to the present invention, since it can rotate freely in one rotational direction and can slide in a state in which a frictional force is applied via a frictional force applying mechanism in the other rotational direction, In the direction of rotation, it can be fixed as long as there is no input greater than the predetermined applied force, it starts to move when a force greater than the friction force determined from the friction coefficient is applied, and only while a force greater than the friction force is applied. A one-way rotating damper having a kind of trigger function of rotating can be provided.

  In the one-way rotation damper, the one-way clutch includes a gear integrally provided on the shaft, and a plurality of pawl members biased by an elastic member that are provided on the cylindrical member and mesh with the gear. And when any one of the plurality of claw members meshes with any one tooth of the gear, the shaft cannot rotate, and the phase difference between the claw member and the gear teeth is The pitch angle can be divided by the number of the claw members. Thereby, when the shaft is rotated in one rotation direction, the fixed position of the shaft can be finely adjusted.

  The phase difference between the plurality of claw members provided for the gear teeth integrally provided on the shaft of the one-way clutch is the size obtained by dividing the pitch angle of the teeth by the number of claw members. It is possible to finely set the position at which the engagement between the teeth and the claw member occurs at any position of the plurality of claw members.

  In the one-way rotation damper, the one-way clutch includes a roller housed in a pocket provided on an inner diameter surface of the cylindrical portion and a biasing spring housed in the pocket, and is formed on a bottom surface of the pocket. A cam surface inclined in a certain direction is formed, a constant wedge angle is formed between the cam surface and the shaft inserted through the central portion of the one-way clutch, and the roller is Since the position of the shaft fixed by the one-way clutch does not depend on the meshing of the mechanical parts by the gear teeth and the claw member as described above, Furthermore, the shaft can be fixed immediately without any play.

  Further, in the one-way rotation damper, the frictional force applying mechanism is configured such that the shaft fixed by the one-way clutch and the outer peripheral surface of the shaft are in contact with each other on the inner peripheral surface, and the frictional sliding is applied to the non-rotatable direction of the shaft. A cylindrical friction material that moves and a fastening member that freely adjusts the contact pressure between the cylindrical friction material and the shaft can be used. Furthermore, since it can take a configuration comprising a fastening member that freely adjusts the contact pressure between the shaft and the inner peripheral surface of the cylindrical friction material, the inner peripheral surface material of the cylindrical friction material and its surface state, Further, the tightening force is appropriately adjusted according to the outer peripheral surface material and surface state of the shaft or cylindrical member or columnar member, and the pressure applied to the friction sliding surface is changed so that the frictional force required for sliding becomes a desired magnitude. be able to.

  Further, in the one-way rotating damper, the frictional force applying mechanism is in contact with the outer peripheral surface of the one-way clutch and the outer peripheral surface with the inner peripheral surface, and the rotation direction in which the shaft is fixed to be non-rotatable by the one-way clutch. And a cylindrical friction material that frictionally slides, and a fastening member that freely adjusts the contact pressure between the cylindrical friction material and the outer peripheral surface of the one-way clutch.

  In the unidirectional rotating damper, the cylindrical friction material is placed on 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 can be a multi-layered bearing comprising a sliding layer of a filled synthetic resin composition and wound in a cylindrical shape with the sliding layer inside. According to this, when the contact pressure between the cylindrical friction material and the outer peripheral surface of the one-way clutch is adjusted by the fastening member, the gap at the joint of the multi-layer winding bearing is reduced, in other words, the multi-layer winding Since the diameter of the bearing can be reduced, the force tightened by the tightening member acts as a contact pressure with the outer peripheral surface of the one-way clutch without waste.

  Furthermore, the present invention is a hinge mechanism comprising the unidirectional rotating damper according to any one of the above, and having a hinge function between a member that frictionally slides by the frictional force applying mechanism and a member that does not slide frictionally. It is characterized by being demonstrated. According to this hinge mechanism, as described above, it can be freely rotated 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

  Further, the present invention is an opening / closing mechanism comprising the hinge mechanism, wherein either one of the friction sliding member and the non-friction sliding member is provided with a mounting portion to the opening / closing object. .

  According to this opening / closing mechanism, when gravity is used in the direction of the external force acting in the other rotational direction via the frictional force applying mechanism, the opening / closing mechanism is caused by a downward rotational moment generated by the weight of the object to be rotated. Since the rotation of the frictional force applying mechanism can be stopped at a position where the rotational force and the frictional force are balanced, the friction applied to the friction surface in advance by the rotational force in the other rotational direction and the frictional force applying mechanism. By setting the force to a predetermined value, the other rotation angle that rotates through the frictional force applying mechanism can be set to a desired angle. In other words, the opening force can be adjusted to a desired position from the balance of the rotational force generated by the rotational moment generated by the weight and size of the lid or door and the frictional force generated by the friction surface, for example. it can.

  Further, by using a one-way clutch provided with the plurality of claw members, when the frictional force applied by the frictional force applying mechanism is fixed at a rotational force or more generated from a rotational moment to rotate, a lid or The locking position of the door can be finely set by the engagement between the gear and the claw member.

  Further, by using a one-way clutch provided with a roller or the like housed in a pocket provided on the inner diameter surface of the cylindrical portion, when the lid or door is fixed to a frame or the like, it is provided integrally with the shaft. Since the gear and the claw member can be prevented from being fixed or closed in a state where they are not engaged with each other, when the fixation with the lid or the frame of the door is released, the gear tooth and the claw member It is possible to preferably prevent a sudden drop of the lid or door that may occur when the meshing is not performed.

  Furthermore, the present invention is a range hood, comprising the above opening / closing mechanism, wherein the object to be opened / closed is a current plate. 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, a range hood, and the like 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 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. It is a top view which shows the other example of the baseplate of the opening / closing mechanism shown in FIG.1 and FIG.3. It is a top view which shows the state which accommodated the claw member and the spring in the base plate shown in FIG. It is a figure which shows 3rd 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 unidirectional rotating damper (or hinge mechanism) according to the present invention. The opening / closing mechanism 1 is roughly divided into a first bracket 2, a torque shaft 7, and the like. The cover plate 8, the ratchet shaft 11, the claw member 12, the spring 13, the base plate 15, the second bracket 17, 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 small-diameter portion 7 b of the torque shaft 7 is accommodated therein, and a tightening force is applied by the bolt 3 and the nut 4. The bearing 6 constitutes a friction force applying mechanism that frictionally slides in the non-rotatable direction of the ratchet shaft 11 with the small diameter portion 7 b of the torque shaft 7.

  The torque shaft 7 includes small-diameter portions 7b and 7c on both sides of the large-diameter portion 7a. As described above, the small-diameter portion 7b and the bearing 6 constitute a frictional force applying mechanism.

  The cover plate 8 has a circular opening 8b in a rectangular plate-like base 8a, and the cylindrical portion 10b of the bearing 10 is inserted into the opening 8b. The bearing 10 has a cylindrical portion 10b protruding from a disc-shaped base portion 10a having an opening.

  The ratchet shaft 11 is provided with a gear 11b at the axial center of the cylindrical portion 11a, and the gear 11b constitutes a one-way clutch with a claw member 12 and the like housed in a base plate 15 described later.

  The base plate 15 includes a circular hole 15b, a claw member accommodating portion 15c, and a spring accommodating portion 15d in a rectangular plate-like base portion 15a. The claw member 12 has a claw portion 12 b protruding from a disc-shaped base portion 12 a and is accommodated in a claw member accommodation portion 15 c of the base plate 15. The spring 13 is housed in the spring housing portion 15d of the base plate 15 and biases the claw member 12 in one direction. Thus, a one-way clutch that allows rotation in only one direction with respect to the gear 11b of the ratchet shaft 11 inserted into the circular hole 15b of the base plate 15 is configured.

  The bearing 16 includes a cap 16b on a disc-like base portion 16a having an opening. The second bracket 17 has a circular opening 17b in a rectangular plate-like base portion 17a, and the base portion 17a includes an attachment portion 17f for a door or the like.

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

  The bearing 6 is accommodated in the bearing accommodating portion 2b of the first bracket 2, and the small diameter portion 7b of the torque shaft 7 is accommodated in the bearing 6, and the bearing accommodating portion 2b is tightened with the bolt 3 and the nut 4 as shown in FIG. As shown in FIG. 2, the device side assembly 21 is completed. Further, by adjusting the tightening force of the bolt 3 and the nut 4, the pressure applied to the friction sliding surface between the bearing 6 and the torque shaft 7 is changed to adjust the frictional force required for sliding to a desired magnitude. be able to.

  On the other hand, the cap 16b of the bearing 16 is inserted into the opening 17b of the second bracket 17, and the claw member 12 and the spring 13 are accommodated in the claw member accommodating portion 15c and the spring accommodating portion 15d of the base plate 15, respectively. The cylindrical portion 11 a of the ratchet shaft 11 is inserted into the circular hole 15 b of the base plate 15 and further into the opening portion 16 c of the bearing 16. Next, the opening of the bearing 10 is inserted into the cylindrical portion 11d of the ratchet shaft 11, and finally, the opening 8b of the cover plate 8 is inserted into the cylindrical portion 11d to complete the door side assembly 22.

  Next, the case where the said apparatus side assembly 21 and the door side assembly 22 are used for opening and closing of the current plate of a range hood is demonstrated, referring FIG.

  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 21 shown in FIG. 1 is fixed to the lower portion of the main body 32, and the apparatus side assembly 21 and the door side assembly 22 are combined. The left end portion of the rectifying plate 33 is fixed to the mounting portion 17 f of the second bracket 17.

  In this state, the rectifying plate 33 is rotated in the direction of arrow A in FIG. 2A with respect to the base plate 15 by the function of a one-way clutch formed by the ratchet shaft 11 and the base plate 15. Cannot be rotated, and can only rotate in the direction of arrow B. Further, the torque shaft 7 receives an input greater than or equal to a predetermined acting force in the direction of the arrow A with respect to the ratchet shaft 11 by a frictional force applying mechanism including the bearing 6 (see FIG. 1) and the torque shaft 7. As long as it does not work, it can be fixed immovably, and when an input exceeding a predetermined acting force works, it is slidable with the acting force applied.

  When the rectifying plate 33 is opened from the state of FIG. 2A with the above configuration, the ratchet shaft 11 cannot rotate with respect to the base plate 15 if the rectifying plate 33 is rotated in the direction of arrow A. When an input of a predetermined working force or more is applied, the torque shaft 7 can rotate with respect to the bearing 6, so that the rectifying plate 33 rotates in the arrow A direction and the rectifying plate 33 can be opened.

  When the rectifying plate 33 reaches a desired position, if the input to the rectifying plate 33 is weakened, the rotation of the torque shaft 7 is stopped by the frictional force applying mechanism between the bearing 6 and the torque shaft 7, so that the rectifying plate 33 is desired. It can be stopped at the position. In a state where 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 bearing 6 and the torque shaft 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 ratchet is formed by the function of the one-way clutch formed by the ratchet shaft 11 and the base plate 15. Since the shaft 11 can rotate in the arrow B direction with respect to the base plate 15, the rectifying plate 33 can be rotated and closed with a slight force.

  Further, at this time, at the position where the rotational force due to the downward rotational moment generated by the weight of the rectifying plate 33 and the frictional force between the bearing 6 and the torque shaft 7 are balanced using gravity, Since the rotation of the frictional force applying mechanism portion with the torque shaft 7 can be stopped, the rotational angle of the rectifying plate 33 rotating through the frictional force applying mechanism is set in advance by setting the frictional force to a predetermined value. 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.

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

  The opening / closing mechanism 41 is roughly divided into a first bracket 42, a torque shaft 47, a cover plate 48, a ratchet shaft 51, a claw member 52, a spring 53, a bearing 56, bearing housings 57 and 58, It consists of the second bracket 62 and the like.

  The first bracket 42 includes a mounting portion 42a for a device or a building, and a bearing 42b. The bearing 42b accommodates a small-diameter portion 47b of the torque shaft 47, and is fastened and held by a bolt 43 and a nut 44. The The torque shaft 47 includes a small diameter portion 47b and an insertion hole 47c on both sides of the large diameter portion 47a.

  The cover plate 48 includes a rectangular opening 48b in a rectangular plate-shaped base 48a and slits 48c and 48d at two locations.

  The ratchet shaft 51 is provided with a gear 51b in the central portion in the axial direction of the cylindrical portion 51a, and meshes with the claw member 52 accommodated in the base plate 55 in the assembled state of the opening / closing mechanism 41, as will be described later.

  The base plate 55 includes a circular hole 55b, a claw member accommodating portion 55c, and a spring accommodating portion 55d provided concentrically on a disc-shaped base portion 55a. The claw member 52 has a claw portion 52 b protruding from a disc-shaped base portion 52 a and is accommodated in a claw member accommodation portion 55 c of the base plate 55. The spring 13 is housed in the spring housing portion 55d of the base plate 55, and biases the claw member 52 in one direction. Thus, a one-way clutch that allows rotation in only one direction with respect to the gear 51b of the ratchet shaft 51 inserted into the circular hole 55b of the base plate 55 is configured.

  The bearing 56 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 56 is mounted on the outer peripheral surface of the base plate 55 and is accommodated in an opening 59 between the bearing housings 57 and 58, and a tightening force is applied by bolts 60 and 61. The bearing 56 constitutes a friction force application mechanism that frictionally slides with the base plate 55 in the direction in which the ratchet shaft 51 cannot rotate.

  The bearing housing 57 constitutes a mounting housing for the bearing 56 together with the bearing housing 58, and a mounting portion 57a to the door or the like is provided with a through hole 57c for fixing the bearing housing 57 to the door or the like through fastening means. . The mounting portion 57a is provided with a standing portion 57b having a bearing seat, and a slit 57d is formed in the standing portion 57b.

  In the bearing housing 58, an insertion hole 58c for connecting to the bearing housing 57 by bolts 60 and 61 and a slit 58b are formed in a main body 58a having a bearing seat.

  The second bracket 62 has a circular opening 62b in a rectangular plate-like base portion 62a, and includes locking claws 62c and 62d at the side edges of the base portion 62a.

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

  The small diameter portion 47b of the torque shaft 47 is accommodated in the bearing 42b of the first bracket 42, the bolt 43 is inserted into the insertion hole 47c of the first bracket 42 and the insertion hole 47c of the torque shaft 47, and tightened with the nut 44 (FIG. As shown in b), the device side assembly 64 is completed.

  On the other hand, the claw member 52 and the spring 53 are respectively accommodated in the claw member accommodating portion 55c and the spring accommodating portion 55d of the base plate 55, the gear 51b of the ratchet shaft 51 is accommodated in the circular hole 55b, and the bearing 56 is disposed on the outer peripheral portion of the base plate 55. Are accommodated in an opening 59 formed by the bearing housing 57 and the bearing housing 58, and tightened with bolts 60 and 61. The opening 48b of the cover plate 48 is inserted through the left cylindrical portion 51a of the ratchet shaft 51, the opening 62b of the second bracket 62 is inserted through the right cylindrical portion 51a of the ratchet shaft 51, and the locking claws 62c and 62d are inserted. The slits 58b of the bearing housing 58, the slits 57d of the bearing housing 57, and the two slits 48c and 48d of the cover plate 48 are inserted into the slits 58b and 48d, respectively. ), The door side assembly 65 is completed.

  Similarly to the opening / closing mechanism 1 shown in FIG. 1, the opening / closing mechanism 41 can be used for opening / closing the current plate of the range hood shown in FIG. Further, in the opening / closing mechanism 41, the bearing 56 is mounted on the outer peripheral surface of the base plate 55, and the contact pressure between the outer peripheral surface of the base plate 55 and the inner peripheral surface of the bearing 56 can be freely adjusted using bolts 60 and 61. Therefore, the tightening force by the bolts 60 and 61 is appropriately adjusted according to the surface material of the base plate 55 and the bearing 56 and the surface state thereof, and the pressure applied to the friction sliding surface is changed to make the frictional force required for sliding to a desired magnitude. be able to. At this time, the gap at the joint of the bearing 56 is reduced, in other words, the diameter of the bearing 56 can be reduced. Therefore, the force tightened by the tightening member acts as a contact pressure with the outer peripheral surface of the base plate 55 without waste.

  Further, as described above, in addition to the configuration in which the bearing 56 is fastened by the bolts 60 and 61 via the bearing housings 57 and 58 (tightening members), one of the opposing surfaces of the two divided members is used by using the half-tightening member. The bearing 56 and the outer peripheral surface of the base plate 55 may be contacted with each other, and the other opposing surface may be tightened with bolts and nuts. A structure may be provided in which a slit reaching the outer surface of the fastening member is provided, and contact pressure between the bearing 56 and the outer peripheral surface of the base plate 55 may be applied by narrowing the gap between the slits with bolts and nuts.

  When a split member is used and the split member is tightened with a bolt and a nut, the position of one of the two opposing faces of the split member is divided into two parts. When one of the opposing surfaces of the member is rotatably fixed by a hinge or the like and the other opposing surface is tightened with a bolt / nut, the other position and further, from the outer peripheral surface of the base plate 55 to the outer surface of the fastening member In the case of a configuration in which a slit is provided, it is desirable that the position of the slit and the position of the joint of the bearing 56 used in the cylindrical friction material are substantially the same in each case. Further, the tightening force applied by the tightening member can be applied without waste.

  As described above, the cylindrical friction material used for the frictional force applying mechanism is the bearing (multi-layer winding bearing) 56 having a seam, but it may be a cylindrical friction material having another configuration, Any configuration capable of reducing the diameter may be used so that pressure from the outer peripheral direction acts on the outer peripheral surface of the base plate 55 without waste. Specifically, it may be a cylindrical friction member having a configuration in which a plurality of slits are provided in the axial direction so that the diameter can be reduced, or a cylindrical friction member using a mesh structure, for example, a member made of an extended metal. Good.

  Furthermore, instead of the configuration in which the cylindrical friction material used for the frictional force applying mechanism is tightened by the tightening member, the inner peripheral surface itself of the tightening member can be used as a state suitable for frictional sliding. 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.

  Next, a modified example of the one-way clutch in the opening / closing mechanisms 1 and 41 will be described with reference to FIGS.

  FIG. 4 shows a base plate 75 in a modified example, and this base plate 75 corresponds to the base plate 15 in the opening / closing mechanism 1 and the base plate 55 in the opening / closing mechanism 41. This base plate 75 is provided with a circular hole 75b, three claw member accommodating portions 75c, three spring accommodating portions 75d, and attachment holes 75e for adjacent members in a plate-like base 75a.

  5 accommodates the gear 11b of the ratchet shaft 11 shown in FIG. 1 or the gear 51b shown in FIG. 3 in the circular hole 75b of the base plate 75 shown in FIG. The member 72 and the spring 73 are accommodated in each of the spring accommodating portions 75d, and the one-way clutch is configured.

  In the one-way clutch shown in FIG. 5, the gear 11 b is rotatable in the direction of arrow A, but cannot be rotated in the direction of arrow B by the claw member 72 biased by the spring 73. . Moreover, since the phase difference between the claw member 72 and the teeth of the gear 11b is a size obtained by dividing the pitch angle of the teeth by 3, when the ratchet shaft 11 in which the gear 11b is integrated is rotated in the arrow B direction. When the ratchet shaft 11 is rotated in the non-rotatable direction in relation to the base plate 15 by the frictional force applying mechanism between the bearing 6 and the torque shaft 7 in FIG. 1, the fixing position of the ratchet shaft 11 is finely adjusted. be able to. More specifically, when the frictional force applied by the frictional force applying mechanism is fixed more than the rotational force generated by the rotational moment to be rotated, the door or the locking position of the rectifying plate 33 shown in FIG. Can be finely set by the engagement between the gear 11b and the claw member 72.

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

  The opening / closing mechanism 81 is roughly composed of a first bracket 82, a bearing 86 that functions as a friction material of the frictional force applying mechanism, a one-way clutch 87, a torque shaft 88, a second bracket 89, and the like.

  The 1st bracket 82 is provided with the attaching part 82a to an apparatus, a building, etc., and the bearing accommodating part 82b, and the bearing 86 is accommodated in the bearing accommodating part 82b.

  The bearing 86 is similar to the bearing 6 in FIG. 1 and the like. The metal back metal, the porous bronze sintered layer formed on the surface of the back metal, and the pores and the surface of the porous bronze sintered layer are filled and coated. A multi-layer wound bearing comprising a sliding layer of the synthetic resin composition formed and wound in a cylindrical shape with the sliding layer inside. The bearing 86 is accommodated in the bearing accommodating portion 82 b, and the one-way clutch 87 and the like are accommodated therein, and a tightening force is applied by the bolt 83 and the nut 84. The bearing 86 constitutes a frictional force applying mechanism that frictionally slides with the one-way clutch 87 in a direction in which the torque shaft 88 cannot rotate.

  The one-way clutch 87 includes a roller housed in a pocket provided on the inner diameter surface and a biasing spring housed in the pocket, and a cam surface inclined in a certain direction is formed on the bottom surface of the pocket, A constant unidirectional rotating damper wedge angle is formed between the cam surface and the small diameter portion 88b on the left side of the large diameter portion 88a of the torque shaft 88 inserted through the central portion, and the roller is moved by the urging spring to the one way clutch. The one-way clutch is configured by being biased in the narrow direction 87.

  The second bracket 89 has a circular opening 89b in a rectangular plate-shaped base 89a, and includes a mounting portion 89c for a door or the like on the back surface of the base 89a.

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

  The small-diameter portion 88b of the torque shaft 88 is inserted and fixed to the one-way clutch 87, the one-way clutch 87 is inserted into the bearing 86, the bearing 86 is inserted into the bearing housing portion 82b of the first bracket 82, and the bearing housing portion 82b is inserted. By fastening with the bolt 83 and the nut 84, the apparatus side assembly 90 is completed as shown in FIG. 6 (b). On the other hand, as shown in FIG. 6C, the second bracket 89 becomes the door-side assembly 91 as it is.

  This opening / closing mechanism 81 can also be used for opening / closing the rectifying plate of the range hood shown in FIG. 2, as in the case of the opening / closing mechanism 1 shown in FIG. 1 and the opening / closing mechanism 41 shown in FIG. Further, since the opening / closing mechanism 81 uses the one-way clutch 87, the position of the torque shaft 88 fixed by the one-way clutch 87 is compared with the one-way clutch using the gear and the pawl member described above. Since it does not depend on the meshing of the mechanical parts by the teeth and the claw member, the torque shaft 88 can be immediately fixed without any play.

DESCRIPTION OF SYMBOLS 1 Opening / closing mechanism 2 1st bracket 2a Mounting part 2b Accommodating part 3 Bolt 4 Nut 6 Bearing 7 Torque shaft 7a Large diameter part 7b Small diameter part 7c Small diameter part 8 Cover plate 8a Base part 8b Opening part 10 Bearing 10a Base part 10b Cylindrical part 11 Ratchet shaft 11a Cylindrical part 11b Gear 11d Cylindrical part 12 Claw member 12a Base part 12b Claw part 13 Spring 15 Base plate 15a Base part 15b Circular hole 15c Claw member accommodation part 15d Spring accommodation part 16 Bearing 16a Base part 16b Cap 16c Opening part 17 Second bracket 17a Base part 17b Opening portion 17f Mounting portion 21 Device side assembly 22 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 42c Insertion hole 43 Bolt 44 Nut 47 Torque shaft 47a Large Diameter part 47b Diameter portion 47c Insertion hole 48 Cover plate 48a Base portion 48b Opening portion 48c Slit 48d Slit 51 Ratchet shaft 51a Cylindrical portion 51b Gear 52 Claw member 52a Base portion 52b Claw portion 53 Spring 55 Base plate 55a Base portion 55b Circular hole 55c Claw member housing portion 55d Spring housing Portion 56 Bearing 57 Bearing housing 57a Mounting portion 57b Standing portion 57c Through hole 57d Slit 58 Bearing housing 58a Body 58b Slit 58c Insertion hole 59 Opening 60 Bolt 61 Bolt 62 Second bracket 62a Base 62b Opening 62c Locking claw 62d Engagement Stopper 64 Device side assembly 65 Door side assembly 72 Claw member 73 Spring 75 Base plate 75a Base 75b Circular hole 75c Claw member accommodation part 75d Accommodation part 75e Mounting hole 81 Opening / closing mechanism 82 First bracket 82a Part 82b bearing receiving portion 83 bolt 84 nut 86 bearing 87 one-way clutch 88 the torque shaft 88a large diameter portion 88b small diameter portion 89 the second bracket 89a base portion 89b opening 89c attachment portion 90 apparatus assembly 91 door side assembly

Claims (9)

A one-way clutch that only allows rotation in one direction around the axis of the shaft;
A one-way rotary damper, comprising: a friction force applying mechanism that applies a friction force to the non-rotatable direction of the shaft of the one-way clutch and frictionally slides the non-rotatable direction of the shaft.   The one-way clutch includes a gear integrally provided on the shaft, and a plurality of claw members biased by an elastic member that mesh with the gear, and any one of the plurality of claw members is the The shaft becomes non-rotatable by meshing with any one tooth of the gear, and the phase difference between the claw member and the gear tooth is a size obtained by dividing the pitch angle of the tooth by the number of the claw members. The unidirectional rotating damper according to claim 1, wherein the unidirectional rotating damper is provided.   The one-way clutch includes a roller housed in a pocket provided on an inner diameter surface of a housing portion in which the shaft is housed, and an urging spring housed in the pocket, and is arranged in a fixed direction on the bottom surface of the pocket. An inclined cam surface is formed, and a constant wedge angle is formed between the cam surface and the shaft inserted through the central portion of the one-way clutch, and the roller is narrowed in the wedge angle direction by the biasing spring. The unidirectional rotating damper according to claim 1, wherein the unidirectional rotating damper is biased by the directional force.   The friction force applying mechanism includes a shaft fixed by the one-way clutch, a cylindrical friction material that is in contact with an outer peripheral surface of the shaft at an inner peripheral surface and frictionally slides in a non-rotatable direction of the shaft; The unidirectional rotating damper according to claim 1, 2 or 3, wherein the unidirectional rotating damper comprises a fastening member that freely adjusts a contact pressure between the cylindrical friction material and the shaft.   A cylindrical friction material in which the frictional force applying mechanism is frictionally slid in a rotational direction in which the outer peripheral surface of the one-way clutch is in contact with the outer peripheral surface on the inner peripheral surface and the shaft is fixed to be non-rotatable by the one-way clutch. 4. The unidirectional rotating damper according to claim 1, wherein the unidirectional rotating damper comprises a fastening member that freely adjusts a contact pressure between the cylindrical friction material and an outer peripheral surface of the one-way clutch.   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. The unidirectional rotating damper according to any one of claims 1 to 5, wherein the unidirectional rotating damper comprises a sliding layer, and is a multilayer wound bearing wound in a cylindrical shape with the sliding layer inside.   The unidirectional rotating damper according to any one of claims 1 to 6, wherein the hinge function is exhibited between a member that frictionally slides by the frictional force applying mechanism and a member that does not frictionally slide. Hinge mechanism.   An opening / closing mechanism comprising the hinge mechanism according to claim 7, wherein an attachment portion for an opening / closing object is provided on one of the friction sliding member and the friction sliding member.   A range hood comprising the opening / closing mechanism according to claim 8, wherein the opening / closing object is a current plate.

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