JP2008136627A - Furniture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide furniture having the option of a setup transient state in mobility by receiving no elastic energizing force and an elastic supporting condition by receiving an elastic energizing force which cancels the inconvenience that the migration of a relative position between a backrest and a seat in an elastic supporting condition and between the seat and a leg is regulated by a driving mechanism while automating migration in the arrangement transient state using the driving mechanism. <P>SOLUTION: In the furniture such as a chair C in which a joint device such as a joint device 4 between the leg and the seat is interposed between two members, for example, a leg body 12 and the seat 2, the joint device, for example, the joint device 4 between the leg and the seat is provided with a driving mechanism 41 which supplies driving force in order to perform a relative displacement between the two members, a clutch 42 which intercepts the supply of the driving force from the driving mechanism 41 in the elastic supporting condition, an elastic energizing mechanism 43 which supplies the elastic energizing force of going to a no-load use position, and an energizing force intercepting mechanism 44 which intercepts the supply of the elastic energizing force from the elastic energizing mechanism in the arrangement transient state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention can change the relative position of two members from the no-load use position toward the load receiving position and receives an elastic biasing force toward the no-load use position, and the relative position of the two members. It is related with the furniture which can select the installation transient state which can move without receiving elastic urging | biasing force between the said no-load use position and a standby position.

Conventionally, various chairs that can move a no-load relative position between two members between a use position and a standby position have been considered in order to save space during storage. On the other hand, the backrest can tilt from the no-load use position to the load receiving position with respect to the seat, and the seat can also tilt with respect to the legs from the no-load use position to the load receiving position. Various chairs are also conceivable in which the back and the seat receive an elastic biasing force toward the no-load use position during tilting (see, for example, Patent Documents 1 and 2).
JP 2006-158745 A JP 2002-172040 A

  Therefore, in order to facilitate the setting up and removal work of such a chair, a drive mechanism for driving the back and the seat is provided, and the power supplied from the drive mechanism to the movement between the no-load use position and the standby position is provided. It is considered to automate using. In addition, the relative position of the two members is changed from the no-load use position to the load receiving position while automating the change between the no-load use position and the standby position using the power supplied from the power unit. Possible to select the elastic support state that receives elastic biasing force toward the no-load use position and the installation transient state that can move between the no-load use position and the standby position using the power supplied from the drive mechanism There is a desire to make it possible. On the other hand, in a mode in which the drive mechanism and either one of the two members are directly connected, the drive mechanism is operated only in the setting transition state, and is stopped in the elastic support state. There is a problem that the movement of the relative position between the backrest and the seat and the seat and the leg in the elastic support state is restricted by the drive mechanism.

  Furthermore, in furniture other than chairs, the change between the no-load use position and the standby position is automated using the power supplied from the drive mechanism, while the distance between the no-load use position and the load receiving position is automated. There is a desire to be able to select an elastic support state that is movable and receives an elastic biasing force toward the no-load use position, and a setup transient state that can move between the no-load use position and the standby position.

  The present invention is configured to solve the problems described above.

  That is, in one of the furniture according to the present invention, the relative position of the two members can be changed from the no-load use position to the load receiving position by the load applied by the user, and the elasticity is applied toward the no-load use position. Between the two members so as to be able to take an elastic support state that receives a force and a configuration transient state in which the relative position of the two members can move between the no-load use position and the standby position without receiving an elastic force. A joint mechanism is provided, wherein the joint apparatus supplies a driving force to cause relative movement between the two members, and the driving force from the driving mechanism in the elastic support state. A clutch that cuts off the supply, an elastic urging mechanism that supplies an elastic urging force toward the no-load use position, and an urging force interruption mechanism that cuts off the supply of the elastic urging force from the elastic urging mechanism in the installation transient state And ingredients Characterized in that it.

  If it is such, when the furniture is installed and removed, the supply of the elastic urging force from the elastic urging mechanism is cut off by the urging force cut-off mechanism as a setting transition state, and only the power supplied from the drive mechanism is used. The movement between the no-load use position and the standby position can be performed smoothly. On the other hand, when furniture is used, an elastic biasing force toward the no-load use position is elastically applied while preventing the movement from being locked by blocking the supply of the driving force from the driving mechanism by the clutch as an elastic support state. The furniture can be suitably used as furniture that can be supplied from the biasing mechanism and can be moved while receiving the elastic biasing force between the no-load use position and the load receiving position between the two members.

  Moreover, the other one of the furniture which concerns on this invention can change the relative position of two members toward the load receiving position from a no-load use position with the load added from a user, and is in a no-load use position. 2 so as to be able to take an elastic support state that receives an elastic biasing force that is directed, and an installation transient state in which the relative position of the two members can move between the no-load use position and the standby position without receiving an elastic biasing force. A joint device is provided between two members, and the joint device supplies a driving force to cause a relative movement between the two members, and a load greater than a predetermined value in the elastic support state. A torque limiter that cuts off the supply of driving force from the drive mechanism when received, an elastic biasing mechanism that supplies an elastic biasing force toward the no-load use position, and the elastic biasing mechanism in the installation transient state Of elastic biasing force Characterized by comprising a bias force interrupting mechanism for interrupting the supply.

  Even in such a case, at the time of furniture installation and removal, as an installation transition state, the switch is used to cut the elastic biasing force from the biasing force cutoff mechanism by the switch, and the unloaded use position only by the power supplied from the drive mechanism And the standby position can be smoothly moved. On the other hand, when furniture is used, the no load is applied while preventing the movement from being locked by blocking the supply of the driving force from the driving mechanism when the torque limiter receives a load exceeding a predetermined level as the elastic support state. Furniture that can supply an elastic biasing force toward the use position from the elastic biasing mechanism and move the relative position of the two members between the no-load use position and the load receiving position while receiving the elastic biasing force Can be suitably used.

  In addition, yet another one of the furniture according to the present invention is that the relative position of the two members can be changed from the no-load use position to the load receiving position by a load applied by the user, and no load is used. An elastic support state that receives an elastic biasing force toward the position, and an installation transient state in which the relative position of the two members can move between the no-load use position and the standby position without receiving an elastic biasing force. The joint device is provided with a joint device between two members, and the joint device detects a movement of the weight of the user and a drive mechanism that supplies a drive force to cause a relative movement between the two members. A posture detection sensor, and a control unit that controls the drive mechanism so that the relative position of the two members corresponds to the posture of the user when the posture detection sensor detects the weight shift of the user in the elastic support state. , An elastic urging mechanism for supplying an elastic urging force toward the no-load use position; and an urging force blocking mechanism for cutting off the supply of the elastic urging force from the elastic urging mechanism in the installation transition state. And

  Even in such a case, when the furniture is installed and removed, the switch is cut off the supply of the elastic urging force from the elastic urging mechanism as an installation transition state, and only the power supplied from the drive mechanism is used to load the no load. The movement between the use position and the standby position can be performed smoothly. On the other hand, when the furniture is used, the driving mechanism detects the user's weight shift by the posture detection sensor as the elastic support state, and the control unit causes the relative position of the two members to correspond to the posture of the user. The relative position of the two members is changed by the drive mechanism, and the elastic biasing force toward the no-load use position can be supplied from the elastic biasing mechanism. That is, the user does not press the structural members such as the backrest and the seat strongly, and when the no-load use position is above the load receiving end position, the drive mechanism moves to the no-load use position. It can be suitably used as furniture capable of moving the relative position of the two members between the no-load use position and the load receiving position while reducing the power to be supplied.

  Further, as a mode effective when the direction of movement from the no-load use position to the removal position is opposite to the direction of change from the no-load use position to the load receiving end position, the biasing force cut-off mechanism is either An engaging claw provided on one member and a receiving claw provided on the elastic biasing mechanism are provided, and the engaging claw and the receiving claw are engaged in the elastic support state, and in the installation transient state. The thing formed by separating these engagement claws and receiving claws can be mentioned. If this is the case, the engagement claw and the receiving claw are not engaged when moving from the no-load use position to the standby position, while the no-load use position to the load receiving position. This is because the engaging claw and the receiving claw can be engaged with each other at the time of movement, and the receiving claw can be pressed by the engaging claw, and an elastic biasing force can be supplied from the receiving claw to the engaging claw. .

  In addition, as an aspect in which such a joining structure can be realized with a small number of parts, a structure in which the elastic urging mechanism uses a torsion bar fixed to any one member can be cited. If it is such, compared with the aspect which uses together the shaft member which has only a pivot function, and the torsion coil spring connected to this shaft member, the other member can be reduced with only a small number of parts by a torsion bar. This is because both a supporting function and a function of supplying an elastic biasing force can be realized, and a stronger elastic biasing force can be supplied.

  As an example of a configuration that can preferably obtain the above-described effects, there are a case where the two members are a chair back and a seat, and a case where the two members are a chair seat and a leg.

  Furthermore, if the joint device is provided at two or more locations, it has three or more members, and the relative position between the two members can be changed at the joint location between two adjacent members. In simple furniture, joint devices can be provided at all or part of such joints to exhibit the above-described effects.

  As an example of a configuration that can suitably obtain the above-described effects, there is a chair provided with the joint device between the backrest and the seat and between the seat and the leg.

  In the present invention, “cut off the supply of driving force” means to completely stop the supply of driving force from the driving mechanism and to slide at least one member against the driving force from the driving mechanism. It is a concept including allowing to move while moving. Similarly, “blocking the supply of the elastic urging force” means that the supply of the elastic urging force from the elastic urging mechanism is completely stopped and at least one of the elastic urging forces from the elastic urging mechanism is against. It is a concept including allowing a member to move while sliding.

  According to the configuration of the present invention, at the time of furniture installation and removal, the elastic urging force from the elastic urging mechanism is disconnected by a switch as a erection transient state, and only the power supplied from the drive mechanism is used from the unloaded use position. The movement to the position at the time of removal or the reverse movement can be performed smoothly.

  On the other hand, in one of the configurations of the present invention, when the furniture is used, an elastic urging force is supplied from the elastic urging mechanism as the elastic support state, and a clutch or a torque limiter is used to supply the elastic urging force from the drive mechanism. Suitable for furniture such as a chair that can prevent the movement from being locked by cutting the driving force and move the relative position of the two members between the normal use position and the tilting position while receiving an elastic biasing force. Can be used for

  In another configuration of the present invention, when furniture is used, an elastic biasing force is supplied from the elastic biasing mechanism as the elastic support state, and the weight of the user is further detected by the posture detection sensor. It is possible to detect the movement, and to control the drive mechanism so that the relative position of the two members corresponds to the posture of the user by the control unit, and to change the relative position of the two members by the drive mechanism. That is, the user does not press the structural members such as the backrest and the seat strongly, and when the no-load use position is above the load receiving end position, the drive mechanism moves to the no-load use position. It can be suitably used as furniture capable of moving the relative position of the two members between the no-load use position and the load receiving end position while reducing the power to be supplied.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1, 2, and 3, the chair C that is a furniture according to the present embodiment has a leg 1, a seat 2 pivotally attached to the upper end of the leg 1, and a pivot at the rear end of the seat 2. A worn backrest 3, a leg seat joint device 4 as a joint device provided between the leg 1 and the seat 2, and a back seat joint as a joint device provided between the seat 2 and the backrest 3. Device 5. Moreover, this chair C can be used as a general chair, and the relative position between the leg 1 and the seat 2 and the relative position between the seat 2 and the backrest 3 are defined as an unloaded use position and a load receiving position. The elastic support state that can move between them and receives the elastic biasing force toward the no-load use position, and the relative positions of the leg 1, the seat 2, and the backrest 3 are the same as the no-load use position. It is possible to adopt a setup transient state that can move without receiving an elastic biasing force with respect to the standby position. 1 is an overall perspective view of the chair C in an elastic support state, FIG. 2 is a front view of the chair C in an elastic support state, and FIG. 3 is a side view of the chair C in an elastic support state. ing. 4 is a side view showing the standby position of the chair C, FIG. 5 is a perspective view showing the leg-seat joint device 4, FIG. 6 is a perspective view showing the back-seat joint device 5, and FIG. FIG. 8 is a plan view showing the leg-seat joint device 4, and FIG. 9 is an exploded perspective view showing the back-seat joint device 5. In FIG. 3, the no-load use position is indicated by a solid line and the load receiving position is indicated by an imaginary line. In FIG. 4, the standby position is indicated by a solid line, and the no-load use position is indicated by an imaginary line.

  In the present embodiment, as shown in FIGS. 1 to 4, the leg 1 includes a hollow disc-like leg base 11, a leg main body 12 connected to the leg base 11 so that the standing angle can be changed, and the leg 1 A leg posture changing mechanism (not shown) that is housed in the lower end of the main body 12 and changes the angle between the upper surface of the leg base 11 and the front surface of the leg main body 12 is provided. A space for accommodating the leg-seat joint device 4 is formed at the upper end of the leg body 12. The leg posture changing mechanism includes a drive mechanism formed by using a power source such as a motor, and in the elastic support state, the leg main body 12 is tilted at a predetermined angle with respect to the vertical direction. In addition, in the installation transition state, the leg body 12 is driven by receiving power from a power source so as to hold the leg body 12 in a standby position where the leg body 12 is erected substantially vertically.

  As shown in FIGS. 1 to 4, the seat 2 has a front end pivotally attached to the leg body 12. Further, in the present embodiment, in the setting transition state, between the standby position where the seat surface is substantially frontward and substantially flush with the front surface of the leg body, and the no-load use position where the seat surface is rearwardly upward, The posture can be changed by being urged by the leg-seat joint device 4. Furthermore, in the elastic support state, it is movable between the no-load use position and a load receiving position where the rear end portion has moved rearward and downward. A space for housing the back seat joint device 5 is formed in the rear portion of the seat 2.

  The backrest 3 has a lower end pivotally attached to the seat 2 as described above and as shown in FIGS. Further, in the present embodiment, in the configuration transition state, the backrest surface is substantially in front and the standby position is substantially flush with the seat surface and the front surface of the leg body, and the backrest surface is directed to the front upper side. Between the positions, the posture can be changed by being biased by the back seat joint mechanism 5. Further, in the elastically biased state, it is movable between the no-load use position and a load receiving position where the upper end portion has moved rearward and downward.

  As shown in FIGS. 5 and 8, the leg-to-seat joint device 4 includes a driving mechanism 41 that supplies a driving force to cause relative movement between the leg 1 and the seat 2, and the elastic support state. A clutch 42 that cuts off the supply of driving force from the drive mechanism 41, an elastic biasing mechanism 43 that supplies an elastic biasing force toward the no-load use position, and the elastic biasing mechanism 43 from the elastic biasing mechanism 43 in the installation transient state. And an urging force blocking mechanism 44 for blocking the supply of the elastic urging force. In FIG. 5, the leg body 12 and the seat 2 are indicated by imaginary lines.

  The drive mechanism 41 is pivotally supported by a motor 411 housed in the leg body 12, a harmonic speed reducer 412 connected to an output shaft 411a of the motor 411, and an output shaft 412a of the harmonic speed reducer 412. A gear pair 413 including a drive gear 413a and a driven gear 413b meshed with the drive gear 413a, and a driven shaft 414 that pivotally supports the driven gear 413b are provided. The number of teeth of the driven gear 413b is larger than the number of teeth of the drive gear 413a. That is, the gear pair 413 also has a speed reducing function.

  In the present embodiment, the clutch 42 is formed using an electromagnetic clutch. In the elastically biased state, the motor 411 of the drive mechanism 41 is stopped, but in this elastically biased state, the supply of driving force from the drive mechanism 41 to the seat 2 is blocked by the clutch 42. These are movable independently, that is, the seat 2 is movable in a state where the motor 411 is stopped. The seat 2 is provided with a driving force receiver 21 which is a member for receiving a driving force supplied from the clutch 42. In a transitional state, the seat 2 is connected to the driven shaft 414 of the driving mechanism 41 via the clutch 42. The driving force receiver 21 is connected to be interlocked.

  In the present embodiment, the elastic urging mechanism 43 includes a torsion bar 431 formed using a prismatic metal rod, and a fixture 432 having a square hole through which the torsion bar 431 can be inserted. It is fixed to the leg main body 12 via a fixing tool 432.

  In this embodiment, the urging force blocking mechanism 44 includes an engaging claw 441 provided on the seat 2 and a receiving claw 442 provided on the torsion bar 431, and the engaging claw 441 in the elastic support state. In addition, the receiving claws 442 are engaged with each other, and the engaging claws 441 and the receiving claws 442 are separated from each other in the setting transition state.

  As shown in FIGS. 6, 7, and 9, the back seat joint device 5 includes a drive mechanism 51 that supplies a drive force to perform relative movement between the seat 2 and the backrest 3, and A clutch 52 that cuts off the supply of driving force from the drive mechanism 51 in the elastic support state, an elastic biasing mechanism 53 that supplies an elastic biasing force toward the no-load use position, and the elastic support in the installation transient state And an urging force blocking mechanism 54 for blocking the supply of the elastic urging force from the urging mechanism 53. In FIG. 6, the seat 2 and the backrest 3 are indicated by imaginary lines.

  The drive mechanism 51 includes a motor 511 housed in the seat 2, a harmonic speed reducer 512 connected to the output shaft 511 a of the motor 511, and a drive pivotally supported by the output shaft 512 a of the harmonic speed reducer 512. A gear pair 513 including a gear 513a and a driven gear 513b meshed with the drive gear 513a, and a driven shaft 514 for pivotally supporting the driven gear 513b are provided. The number of teeth of the driven gear 513b is larger than the number of teeth of the drive gear 513a. That is, the gear pair 513 also has a speed reducing function.

  In the present embodiment, the clutch 52 is formed using an electromagnetic clutch. In the elastically biased state, the motor 511 of the drive mechanism 51 is stopped. In this elastically biased state, the supply of driving force from the drive mechanism 51 to the backrest 3 is cut off by the clutch 52. These can be moved independently, that is, the backrest 3 can be moved while the motor 511 is stopped. The backrest 3 is provided with a driving force receiver 31 which is a member for receiving a driving force supplied from the clutch 52. In a transitional state, the driven shaft 514 of the driving mechanism 51 is interposed via the clutch 52. And the driving force receiver 31 are connected to each other.

  In the present embodiment, the elastic urging mechanism 53 includes a torsion bar 531 formed using a prismatic metal rod, and a fixture 532 having a square hole through which the torsion bar 531 can be inserted. It is fixed to the seat 2 via a fixing tool 532.

  In this embodiment, the urging force blocking mechanism 54 includes an urging force receiving plate 541 provided on the backrest 3, an urging force supply plate 542 provided on the torsion bar 431, and an electromagnetic clutch 543 provided therebetween. It comprises. Then, these are connected so that the elastic urging force can be transmitted from the urging force supply plate 542 to the urging force receiving plate 541 in the elastic support state, and the urging force receiving plate 541 from the urging force supply plate 542 in the setting transient state. The supply of elastic urging force to is cut off.

  When this chair C moves from the no-load use position to the load receiving position in the elastic support state, each part acts as follows.

  That is, when a seated person puts a load on the backrest 3, as described above, in the elastically biased state, the supply of driving force from the drive mechanism 51 to the backrest 3 is cut off by the clutch 52 of the back seat joint device 5. Since the backrest 3 can be moved while the motor 511 is stopped, the backrest 3 tilts toward the load receiving position. On the other hand, the urging force blocking mechanism 54 of the back joint device 5 can transmit the elastic urging force from the urging force supply plate 542 to the urging force receiving plate 541 via the electromagnetic clutch 543 in the elastic support state. Therefore, the backrest 3 receives an elastic biasing force from the torsion bar 531 through the biasing force supply plate 542 and the biasing force receiving plate 541 toward the no-load use position. Further, when the rear portion of the seat 2 is subjected to an action toward the rear and lower along with this, as described above, in the elastically biased state, the driving force from the drive mechanism 41 to the seat 2 is increased by the clutch 42 of the leg-to-seat joint device 4. Since the supply is cut off and these can move independently, that is, the seat 2 can be moved while the motor 411 is stopped, the seat 2 tilts toward the load receiving position. On the other hand, the urging force blocking mechanism 44 of the leg-to-seat joint device 4 engages the engaging claw 441 provided on the seat 2 and the receiving claw 442 provided on the torsion bar 431 in the elastic support state. Since the elastic urging force can be transmitted, the seat 2 receives the elastic urging force from the torsion bar 431 through the urging force blocking mechanism 44 toward the no-load use position.

  Further, when the chair C moves from the no-load use position to the standby position in the setting transition state, each part operates as follows.

  That is, when the user operates, for example, a switch (not shown) to move from the no-load use position to the standby position, as described above, the urging force blocking mechanism 54 of the back seat joint device 5 operates the electromagnetic clutch 543 in the installation transient state. Since the transmission of the elastic biasing force from the biasing force supply plate 542 to the biasing force receiving plate 541 is interrupted, the backrest 3 is in a state where it does not receive the elastic biasing force from the torsion bar 531. On the other hand, in the installation transition state, the driving force is supplied from the driving mechanism 51 to the backrest 3 by the clutch 52 of the back seat joint device 5, and the backrest 3 is moved by the driving force from the motor 511. Therefore, the backrest 3 moves toward the standby position without receiving an elastic biasing force. Further, as described above, the urging force blocking mechanism 44 of the leg-to-seat joint device 4 is configured such that the engaging claw 441 provided on the seat 2 and the receiving claw 442 provided on the torsion bar 431 are separated in the transitional state. Thus, the elastic urging force is cut off, so that the seat 2 is not subjected to the elastic urging force from the torsion bar 431. On the other hand, in the installation transition state, the driving force is supplied from the driving mechanism 41 to the seat 2 by the clutch 42 of the leg-seat joint device 4, and the seat 2 is moved by the driving force from the motor 411. Therefore, the seat 2 moves toward the standby position without receiving an elastic biasing force.

  As described above, in the chair C according to the present embodiment, the urging force blocking mechanisms 44 and 54 change the elastic urging mechanisms 43 and 53 from the elastic urging mechanisms 43 and 53 to the seat 2 or the backrest 3 as a erection transient state at the time of erection and removal. The elastic urging force is cut off, and the movement between the no-load use position and the standby position can be smoothly performed only by the power supplied from the drive mechanisms 41 and 51. On the other hand, when used as a chair, it is in an elastic support state, and the movement of the seat 2 or the backrest 3 is locked by blocking the supply of the driving force from the driving mechanisms 41, 51 by the clutches 42, 52. While preventing, the elastic urging force toward the unloaded use position is supplied from the elastic urging mechanisms 43 and 53 to the seat 2 or the backrest 3, respectively, and the relative position between the leg 1 and the seat 2 and the seat 2 and the backrest 3 are supplied. The relative position can be moved between the no-load use position and the load receiving position while receiving the elastic biasing force.

  The urging force blocking mechanism 44 of the leg-to-seat joint device 4 includes an engaging claw 441 provided on the seat 2 and a receiving claw 442 provided on the torsion bar 431, and these are engaged in the elastic support state. The claw 441 and the receiving claw 442 are engaged with each other, and the engaging claw 441 and the receiving claw 442 are separated from each other in the above-described transitional state. While the engagement claw 441 and the receiving claw 442 are not engaged during the movement, the engagement claw 441 and the receiving claw 442 are moved during the movement from the no-load use position to the load receiving position. , And the receiving claw 442 is pressed by the engaging claw 441 so that an elastic biasing force is supplied from the receiving claw 442 to the engaging claw 441. That is, in the leg joint joint device 4 in which the direction of movement from the no-load use position to the position at the time of removal is opposite to the direction of change from the no-load use position to the load receiving end position, the number of parts is simple and the mechanism is simple. Such an urging force blocking mechanism 44 can be realized without requiring special wiring and with little assembling work.

  Further, the elastic biasing mechanism 43 of the leg-seat joint device 4 is configured using the torsion bar 431 fixed to the leg 1, and the back-seat joint device 5 of the back-seat joint device 5 is used using the torsion bar 531 fixed to the seat 2. Since the elastic urging mechanism 53 is configured, the other member is reduced in the number of parts compared to a mode in which a shaft member having only a pivotal support function and a torsion coil spring connected to the shaft member are used together. The leg-seat joint device 4 and the back-seat joint device 5 having both a supporting function and a function of supplying an elastic biasing force can be realized. Further, by adopting such a configuration, a stronger elastic biasing force can be supplied with a simple configuration.

  Further, since both the leg-seat joint device 4 and the back-seat joint device 5 are provided, the effects described above are exhibited at both the joint between the leg 1 and the seat 2 and the joint between the seat 2 and the backrest 3. Can be made.

  The present invention is not limited to the embodiment described above.

  For example, when the back-seat joint device and the leg-seat joint device are replaced with the clutch, the seat and the backrest receive the load from the seated person toward the load receiving position from the no-load use position. A torque limiter that cuts off the power supply from the mechanism and allows the seat or the backrest to move while sliding on the driven shaft of the power mechanism may be provided.

  Further, instead of the clutch, a posture detection sensor for detecting the movement of the seated person's weight, and 2 in accordance with the posture of the seated person when the posture detection sensor detects the movement of the weight of the seated person in the first state. You may make it comprise the control part which performs control which drives the said other member to the said drive part with the motive power from the said power part in order to move one member relatively.

  The posture detection sensor includes, for example, a backrest-side pressure detection sensor for detecting that the seated person has tilted his back backward when the backrest receives a load exceeding a predetermined level, and a load applied to the rear portion of the seat. A seat-side pressure detection sensor that detects that the seat occupant has applied force to the buttocks to release the backward tilt of the backrest when the speed increases at a predetermined speed or more can be considered.

  Further, the urging force blocking mechanism of the leg-to-seat joint device is not limited to the aspect provided with the engaging claw 441 provided on the seat 2 and the receiving claw 442 provided on the torsion bar 43 as described above. You may comprise using a mechanical clutch etc.

  In addition, the reaction force supply mechanism does not need to be a torsion bar fixed to one member, and is configured using a shaft member provided on one member and a torsion coil spring connected to the shaft member. I will not prevent it.

  Of course, an articulation device may be provided only between the leg and the seat, or between the seat and the backrest. In a chair having an elbow member, between the seat and the elbow member, or the backrest and the elbow member. A joint device may be provided between the two.

  And you may provide such a joint apparatus in the junction part of the top plate and leg of furniture with a top plate. As a furniture with a top plate provided with such a joint device, for example, a top plate that can use both plate surfaces as a top plate surface and a pair of legs that respectively support both side edges of the top plate are provided. In addition, the top plate can move between a neutral position in which the both plate surfaces face each other in the front-rear direction and in a no-load use state and a load receiving position in which the first plate surface faces upward, and toward the no-load use position. The top plate receives the elastic urging force between the elastic support state that receives the elastic urging force, the neutral position in which the two plate surfaces face each other in the front-rear direction, and the standby position in which the second plate surface faces upward. And a joint apparatus provided between the top plate and the legs so that a movable transition state can be taken without any change.

  In addition, various modifications can be made without departing from the spirit of the present invention.

The whole perspective view showing the chair concerning one embodiment of the present invention. The front view which shows the chair which concerns on the same embodiment. The side view which shows the elastic support state of the chair which concerns on the same embodiment. The side view which shows the standby position of the chair which concerns on the same embodiment. The perspective view which shows the leg joint apparatus of the chair which concerns on the same embodiment. The perspective view which shows the back seat joint apparatus of the chair which concerns on the same embodiment. The top view which shows the back seat joint apparatus of the chair which concerns on the same embodiment. The top view which shows the leg joint apparatus of the chair which concerns on the same embodiment. The disassembled perspective view which shows the back seat joint apparatus of the chair which concerns on the same embodiment.

Explanation of symbols

C ... Chair 1 ... Leg 2 ... Seat 3 ... Backrest 4 ... Leg-seat joint device 5 ... Back seat joint device 41, 51 ... Drive mechanism 42, 52 ... Clutch 43, 53 ... Elastic biasing mechanism 44, 54 ... Biasing force Shut-off mechanism

Claims (9)

An elastic support state in which the relative position of the two members can be changed from the no-load use position toward the load receiving position by a load applied by the user, and an elastic biasing force toward the no-load use position is received, and the two members The joint device is provided between the two members so that the relative position of the non-load use position and the standby position can move between the no-load use position and the standby state without being subjected to elastic biasing force. A driving mechanism in which the joint device supplies a driving force to cause relative movement between the two members; a clutch that cuts off the supply of the driving force from the driving mechanism in the elastic support state; A furniture comprising: an elastic urging mechanism that supplies an elastic urging force toward a position; and an urging force blocking mechanism that blocks supply of the elastic urging force from the elastic urging mechanism in the installation transition state. An elastic support state in which the relative position of the two members can be changed from the no-load use position toward the load receiving position by a load applied by the user, and an elastic biasing force toward the no-load use position is received, and the two members The joint device is provided between the two members so that the relative position of the non-load use position and the standby position can move between the no-load use position and the standby state without being subjected to elastic biasing force. A driving mechanism that supplies a driving force to cause the joint device to perform a relative movement between the two members; and a driving force that is supplied from the driving mechanism when the joint device receives a predetermined load or more in the elastic support state. A torque limiter that cuts off, an elastic biasing mechanism that supplies an elastic biasing force toward the no-load use position, and a biasing force blocking mechanism that blocks the supply of the elastic biasing force from the elastic biasing mechanism in the setting transition state Equipped with Furniture characterized by Rukoto. An elastic support state in which the relative position of the two members can be changed from the no-load use position toward the load receiving position by a load applied by the user, and an elastic biasing force toward the no-load use position is received, and the two members The joint device is provided between the two members so that the relative position of the non-load use position and the standby position can move between the no-load use position and the standby state without being subjected to elastic biasing force. The joint device supplies a driving force to cause relative movement between the two members, a posture detection sensor for detecting a weight shift of the user, and the posture detection sensor used in the elastic support state. A control unit that controls the drive mechanism so that the relative position of the two members corresponds to the posture of the user when a weight shift of the person is detected, and an elastic biasing force toward the no-load use position Furniture, characterized by comprising an elastic biasing mechanism, a biasing force interrupting mechanism for interrupting the supply of the elastic biasing force from the elastic urging mechanism by the construction transient state. The urging force blocking mechanism includes an engaging claw provided on one of the members and a receiving claw provided on the elastic urging mechanism, and engages the engaging claw and the receiving claw in the elastic support state. The furniture according to claim 1, 2, or 3, wherein the engaging claw and the receiving claw are separated in the installation transition state. The furniture according to claim 1, 2, 3, or 4, wherein the elastic urging mechanism uses a torsion bar fixed to any one of the members. 6. The furniture according to claim 1, 2, 3, 4 or 5, wherein the two members are a backrest and a seat of a chair. The furniture according to claim 1, wherein the two members are a chair seat and a leg. The furniture according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the joint devices are provided at two or more locations. The furniture according to claim 8, wherein the furniture is a chair provided with the joint device between a backrest and a seat and between a seat and a leg.

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