JP5311369B2 - Chair - Google Patents

Description

  The present invention relates to a chair capable of moving a seat back and forth with respect to a seat receiver.

  Conventionally, a chair has been proposed in which a seated person can arbitrarily adjust the front-rear position of the seat by moving the seat back and forth with respect to the seat receiver (see, for example, Patent Document 1).

  Many of these chairs have a plurality of concave portions arranged in the front-rear direction provided on either one of the seat and the seat, and the convex portions provided on the other are selectively engaged with each other so that the seat is moved back and forth. It can be positioned at a desired position in the direction.

In order to make such uneven engagement easy, either or both of the seat support and the seat are provided with a movable part for the seated person to operate, in order to change the position of the seat In such a state, such a movable part is temporarily operated, and an operation of changing the front and rear position of the seat is performed.
JP 2004-33464 A

  However, in such a chair, not only the vertical load due to the weight of the seated person but also the horizontal load including the front-rear direction is applied to the seat and the seat rest due to the change of the posture of the seated person and the weight movement. It always takes. Since such a load is also applied to the above-mentioned movable part in the same manner, depending on the structure of the chair, such a movable part may be more easily exhausted than other parts of the seat. In that case, even if the durability of other parts is high or the durability is improved, the fatigue of such a movable part does not lead to the improvement of the durability of the entire seat, and consequently the chair as a whole. End up.

  The present invention pays attention to such a problem, and provides a chair capable of suitably operating a seat and having effectively improved durability.

In order to achieve such an object, the present invention takes the following measures. That is, the chair according to the present invention is attached to any one of a seat receiver, a seat plate that is slidable in the front-rear direction with respect to the seat receiver, and the seat receiver and the seat plate. On the other hand, the mooring portion that is operatively moored between the positioning position where the seat plate is positioned at an arbitrary position and the retracting position that allows the sliding movement of the seat plate relative to the seat receiver is different from the mooring portion in the positioning position. A locking member having a seat receiving side engaging portion that engages with the seat plate so as not to move relative to the seat plate ; It is .

  In such a case, the seat plate side engagement portion and the seat plate side engagement portion and the seat plate side engagement portion are not applied to the seat or the movable portion of the seat support due to a change in the posture of the seated person or weight shift. Since it will be applied to a part, since durability of a movable part can be improved effectively, durability of seat itself can be raised effectively. As a result, the durability of the chair can be effectively improved.

  In order to effectively hold the locking member at the positioning position, the locking member is attached to the seat plate, and the seat receiving side engaging portion is provided with the engaging recess provided on the upward surface of the seat receiving member. It is desirable to have an engaging protrusion provided so as to protrude downward with respect to the case.

  And as a desirable configuration of the seat plate side engagement portion using such an engagement projection, the seat plate side engagement portion is provided by penetrating the engagement projection from above through a through hole formed in the seat plate. Preferably.

In the above configuration, in order to achieve a more stable positioning position and effectively prohibit relative movement between the seat and the seat, the present invention further includes a cushion material above the seat plate. characterized by the timber shall be pressed to the positioning position the locking member from above.

  In order to more effectively prohibit the relative movement between the seat and the seat receiver using the load of the seated person, it is desirable to attach the locking member to the rear end portion of the seat plate.

  In order to obtain an accurate operation of the relative movement between the seat plate and the locking member with a simple configuration, it is desirable to attach the mooring portion to the seat plate in a rotatable manner.

  In particular, in order to make the rotating portion less susceptible to the relative movement of the seat and the seat support, the mooring portion is used as the rotation shaft, and the seat plate is allowed to move back and forth around the rotation shaft and It is desirable to have a long hole support portion that is rotatably supported.

  And as a structure for guiding the locking member from the retracted position to the positioning position promptly, the locking member has an elastic biasing portion that accumulates an elastic repulsive force in a direction to move the locking member to the positioning position. And it is sufficient.

  According to the present invention, the seat plate-side engagement portion and the seat plate-side engagement portion are not subjected to a load due to a change in posture of the seated person or a weight shift on the seat or the movable portion of the seat support. Therefore, since the durability of the movable part can be effectively improved, the durability of the seat itself can be effectively increased, and the durability of the chair can be effectively improved.

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

  As shown in FIGS. 1 to 5, the chair 1 according to the present embodiment has a leg 2, a support base 3 attached to the upper end side of the leg 2 so as to be horizontally pivotable, and a front part supported by the support base 3. A seat receiver 4, a seat 5 attached to the seat receiver 4, a back support rod 6 having a lower end pivotally supported by the support base 3 and supporting the rear portion of the seat receiver 4, and a backrest 7 attached to the back support rod 6. And so-called swivel chair. And this chair 1 is comprised so that the inner shell 51 which is a seat board which plays the role as a structural member which supports the load applied to the said seat 5 equally can be slid with respect to the seat receiver 4, and is three steps of front and rear. The seat 5 can be positioned at a required position.

  Here, the chair 1 according to the present embodiment is attached to the inner shell 51 serving as a seat plate, and the positioning position (P) in which the inner shell 51 is positioned at an arbitrary position with respect to the seat receiver 4 and the inner position with respect to the seat receiver 4. The pivot shaft 551 is a mooring portion that is operatively anchored between the retracted positions (Q) that allow the sliding movement of the shell 51, and the seat 4 is positioned at a position different from the pivot shaft 551 at the positioning position (P). And a locking member 55 having a seat receiving side engaging portion X that engages in a relatively unmovable manner and a seat side engaging portion Y that is a seat plate side engaging portion that engages in an incapable relative movement with respect to the inner shell 51. It is characterized by doing.

  Hereinafter, the structure of each part is demonstrated concretely.

  As shown in FIGS. 1 to 3, the seat 4 is disposed above the support base 3, and a rod-shaped front frame (not shown) provided at the front end is supported by the support base 3. The seat receiver 4 has a large number of ribs (not shown) projecting upward from the inside. By providing four female screw holes in the front, rear, right and left between the ribs, a slider 56 (to be described later) of the seat 5 can be mounted. A screwing portion 41 that can be screwed and a slot portion 42 that can accommodate an insertion projection 552 (described later) provided at the center of the rear end of the seat receiver 4 without rattling. The slot portion 42 includes a front slot 421, a middle slot 422, and a rear slot 423 provided at equal intervals in the front-rear direction, and the insertion protrusion 552 is inserted into one of them. In addition, although the chair 1 of this embodiment does not have an armrest, it is good also as what was provided with the armrest extended toward the upper direction from the left-and-right both-sides edge vicinity part of this seat 4, respectively.

  As shown in FIGS. 2, 3, and 5, the seat 5 has an inner shell 51 that serves as a structural member that uniformly supports the load applied to the seat 5 as described above, a cushion material 52, and a tension fabric 53. And a locking member 55 described in detail after being attached to the rear end of the inner shell 51.

  As shown in FIGS. 2, 3, and 5, the cushion material 52 is disposed above the inner shell 51. In the present embodiment, the cushion material 52 is formed integrally with, for example, urethane. However, various existing materials can be employed for the cushion material 52. Further, in this embodiment, when the cushion material 52 is assembled to the inner shell 51 together with the upholstery 53, a direction in which a locking member 55 described later is pressed toward the positioning position (P), that is, a state in which the cushion member 52 is urged downward from above. It becomes.

  2, 3, and 5, the upholstery 53 includes, for example, a upholstery main body 531 having a shape that can suitably cover the cushion material 52 by appropriately forming a mesh base, and ends of the upholstery main body 531. A string insertion part 532 through which a fixing string 533 (to be described later) can be inserted at the edge, and a fixing string by which the cushion material 52 can be suitably brought into close contact with the inner shell 51 by being pulled and fixed while being passed through the string insertion part 532. 533. The upholstery 53 is greatly opened at the position of the string insertion portion 532, and the fixed string 533 is hooked on the hook of the inner shell 51 (not shown) via the string insertion portion 532 while covering the cushion material 52 from the position of the opening. It can be suitably assembled to the inner shell 51 by binding the fixed string 533 with an appropriate strength. When the upholstery 53 is assembled to the inner shell 51, the fixing string 533 accommodated in the string insertion portion 532 is hooked on the upholstery fixing portion 555 of the locking member 55 described later, thereby The member 55 can be urged downward, that is, the positioning position (P).

  As shown in FIGS. 3, 4 and 5, the inner shell 51 is attached to the inner shell main body 54, which is the main body of the inner shell 51, and is slidably attached thereto. And a slider 56 fixed to the stopper 41.

  As shown in FIGS. 2 and 3, the slider 56 is attached to the front and rear, left and right of the inner shell body 54 at four positions so that the upper end side is slidable in the front and rear direction, and the lower end side is fixed to the screw fastening portion 41 of the seat 4. By doing so, the separation between the seat 4 and the inner shell 51 is prohibited and the back-and-forth movement is secured. The dimension by which the slider 56 can move back and forth corresponds to the dimension from the front slot 421 to the rear slot 423 described above.

  The inner shell main body 54 is formed by, for example, integral molding using a synthetic resin. As shown in FIGS. 3, 4, and 5, the inner shell main body 54 has a slider support portion (not shown) that supports the slider 56 so as to be movable back and forth as described above. And a bearing portion 541 that rotatably supports the locking member 55 at the center rear end, and a through hole 542 that is an insertion hole through which an insertion protrusion 552 described later can be passed.

  The bearing portion 541 is provided symmetrically in the front-rear direction at the center in the width direction of the inner shell main body 54 and slightly rearward, and is a length that is flattened in the front-rear direction and opened at the center. A hole support portion 541a is provided.

  The through hole 542 is a rectangular opening that is provided in the inner shell main body 54 behind the bearing portion 541 and is long in the width direction. The opening dimension of the through-hole 542 is provided so as to substantially match the dimension of the base end side of the insertion protrusion 552, which will be described later, that is, the seat side engagement part Y described in detail later, whereby the locking member 55 is positioned at the positioning position (P). In this case, the locking member 55 and the inner shell main body 54 are fixed so as to be immovable by being firmly engaged with the seat side engaging portion Y without substantial gap.

  The locking member 55 is integrally formed of the same resin material as the inner shell main body 54, for example, and is attached to the inner shell 51, specifically, a bearing portion 541 described later of the inner shell main body 54 so as to be rotatable. Thus, a positioning position (P) in which the inner shell 51 is fixed to the seat receiver 4 and a retracted position (Q) in which the inner shell 51 can be allowed to move back and forth can be taken. As shown in FIGS. 3, 4, and 5, the locking member 55 protrudes downward on the rotating shaft 551 that is an anchoring portion extending in the width direction at both the left and right ends, and on the rear side of the rotating shaft 551. From the position of the insertion protrusion 552 that is the provided engagement protrusion, the elastic biasing portion 553 that extends forward from the rotating shaft 551 in a state where the resin is thinner than the other portions, and the position of the insertion protrusion 552 It has an operation part 554 in which the resin is inclined upward and extended toward the rear end, and an upholstery fixing part 555 formed in a nail shape on the lower surface of the operation part 554.

  The rotating shaft 551 is attached to the above-described symmetrical bearing portion 541 by using, for example, a “kendo method” or a gradual elastic deformation, and in the attached state, the long hole described above. The support portion 541a is supported so as to be movable and rotatable.

  The insertion protrusion 552 passes through the through-hole 542 formed in the inner shell 51 from above with substantially no gap when the locking member 55 is set to the positioning position (P), and the upward direction of the seat receiver 4 It can be inserted into the slot portion 42, which is an engaging recess provided on the surface, with almost no gap. And in this positioning position (P), the insertion protrusion 552 constitutes the seat side engagement portion Y according to the present invention on the upper side penetrating the through hole 542, and relates to the present invention on the lower side inserted into the slot portion 42. The seat receiving side engagement part X is comprised.

  The elastic biasing portion 553 has a tip that is substantially in contact with the inner shell main body 54 at the positioning position (P), and the tip presses the inner shell main body 54 when the locking member 55 is in the retracted position (Q). The elastic repulsive force in the direction to move to the positioning position (P) is accumulated.

  The operation portion 554 is formed by shaping the rear end portion of the locking member 55 into a shape in which a finger or the like is easily hooked. When the operation portion 554 is not touched, the elastic urging portion 553, the cushion material 52, and the tension fabric described above are used. Since the locking member 55 is positioned at the positioning position (P) by 53, the operation portion 554 is moved upward to be moved to the retracted position (Q).

  The upholstery fixing portion 555 is formed in the shape of an upward hook at the rear of the operation portion 554, and together with the inner shell main body 54 by hooking the fixing strap 533 with the fixing strap 533 inserted in the string insertion portion 532. The upholstery 53 can be positioned, and the operating portion 554 can be urged downward and urged to the positioning position (P) by the tension of the upholstery main body 531 or the fixed string 533.

  Therefore, as described above, the chair 1 according to the present embodiment has the seat receiving side engaging portion X and the inner shell that are engaged with the seat receiving 4 at a position different from the mooring portion at the positioning position (P) so as not to be relatively movable. And a seat-side engagement portion Y that is a seat-plate-side engagement portion that is engaged with 51 so as not to be relatively movable. Hereinafter, with respect to the seat side engaging portion Y and the seat receiving side engaging portion X, together with the operation when the seat 5 is slid in the front-rear direction by operating the locking member 55 described above, FIGS. This will be described with reference to FIG.

  FIG. 5 shows a state in which the seat 5 is positioned in the foremost side by inserting the insertion protrusion 552 into the front slot 421 among the slots provided in the seat receiver 4. In this state, the locking member 55 at the positioning position (P) is in a state where the tip of the elastic biasing portion 553 is in contact with the inner shell main body 54, the pressing of the cushion material 52 from above, and the tension fixing portion 555. The seat receiving side engagement portion X located below the insertion protrusion 552 is securely inserted into the front slot 421 without substantial gaps by being biased by the fixed string 533 of the upholstery 53 at the position of Since the seat side engaging portion Y located on the upper side of the protrusion 552 passes through the through hole 542 with almost no gap, the locking member 55 moves not only with respect to the seat receiver 4 but also with respect to the inner shell 51 at the same time. It is prohibited. Then, as shown in FIG. 6, when the operation unit 554 is lifted upward by fingers, for example, the retracted position (Q) where the insertion protrusion 552 is removed from the front slot 421 and the through hole 542 while the elastic biasing portion 553 is elastically deformed. It becomes. In this retracted position (Q), the inner shell 51 can be moved in the front-rear direction by the slider 56 described above. Then, as shown in FIG. 7, when the finger is released after the seat 5 is displaced backward, the locking member 55 becomes the positioning position (P) again by the elastic repulsive force accumulated by the elastic biasing portion 553. Similarly, at the positioning position (P) shown in FIG. 7, the seat receiving side engaging portion X of the insertion protrusion 552 is securely inserted into the rear slot 423 with almost no gap, and on the upper side of the insertion protrusion 552. Since the seat-side engaging portion Y positioned passes through the through hole 542 with almost no gap, the locking member 55 is in a state where not only the movement with respect to the seat receiver 4 but also the movement with respect to the inner shell 51 is prohibited. .

  With the configuration as described above, the chair 1 according to the present embodiment includes the locking member 55 as described above, so that the posture of the seat side engaging portion Y and the seated person is changed, the body weight is moved, and the like. Therefore, the load of the seat 5 or the seat 4 is not applied to the seat-side engaging portion X and the seat-side engaging portion Y, which is the seat plate-side engaging portion. Since it can be improved effectively, the durability of the seat 5 itself is effectively increased. That is, the durability as the chair 1 is effectively improved.

  Then, it is assumed that the locking member 55 is attached to the inner shell 51, and the seat receiving side engaging portion X is downwardly inserted into a slot portion which is an engaging recess provided on the upper surface of the seat receiving 4. Since the insertion convex portion 552 that is the protruding protrusion is provided, the locking member 55 can be effectively held at the positioning position (P).

  Then, the seat side engaging portion Y is provided through the through hole 542 formed in the inner shell 51 through the insertion convex portion 552 as an engaging protrusion from above without a substantial gap, thereby further increasing the load on the rotating shaft. It can be effectively resolved. In addition, as a mode in which the cushioning member 52 is moved from the upper side to the positioning position (P), the cushioning member 52 is suitably positioned by using what a general chair originally has.

  In addition, the locking member 55 is attached to the rear end of the inner shell 51 so that the locking member does not operate unexpectedly due to the seat 5 coming into contact with something outside. It is said.

  In this embodiment, in order to obtain a mooring portion that moves the inner shell 51 and the locking member 55 relative to each other with a simple operation, a rotation shaft 551 is provided to rotate the inner shell 51. Installed as possible. Further, in order to make the rotation shaft less susceptible to the relative movement of the seat 5 and the seat receiver 4, in this embodiment, the rotation shaft 551 is supported by the long hole support portion 541a, and a load is applied to the rotation shaft 551. It is assumed that the load can be suitably released as the rotation shaft can move in the long hole support when it is applied.

  In the present embodiment, by providing the elastic biasing portion, the locking member 55 can be promptly guided from the retracted position (Q) to the positioning position (P), and is stable when the operation portion 554 is not operated. Thus, the positioning position (P) is obtained.

<Modification>
Hereinafter, modifications of the above-described embodiment will be described. In the modification, the same components as those of the above-described embodiment are denoted by the same reference numerals and detailed description thereof is omitted.

  As shown in FIG. 8, the locking member 55 according to the present modification is slightly ahead of the insertion protrusion 552 b in addition to the insertion protrusion 552 b that is inserted into the slot portion 42 provided in the seat receiver 4 with almost no gap. A convex portion 552a that can be engaged with the concave and convex portions of the concave portion 543 of the inner shell main body 54 is formed. With such a configuration, the insertion protrusion 552b itself serves as the seat receiving side engaging portion X according to the present invention, and the convex portion 552a serves as the seat side engaging portion Y according to the present invention.

  Thus, you may set the seat side engaging part Y and the seat receiving side engaging part X in the position which left | separated. In other words, if the seat side engaging portion Y and the seat receiving side engaging portion X are configured to be relatively incapable of moving relative to each other, the same operations and effects as those of the above-described embodiment can be obtained.

  Although the embodiment of the present invention has been described above, the specific configuration of each unit is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, the locking member may be moored to the seat receiving side so as to be movable. Moreover, in the said embodiment, although the engagement of the seat side engaging part and the seat receiving side engaging part was cancelled | released simultaneously in the retracted position, it is good also as an aspect which cancels | releases either one of them.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

1 is a side view according to an embodiment of the present invention. Structure explanatory drawing which concerns on the same embodiment. The exploded view concerning the embodiment. The principal part disassembled perspective view which concerns on the same embodiment. FIG. 3 is a cross-sectional view of a main part according to the embodiment. FIG. 6 is an explanatory diagram of such an operation. Same as above. Explanatory drawing of the principal part which concerns on the modification of the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Chair 4 ... Seat receiver 42 ... Engagement recessed part (slot part)
51 ... Seat plate (inner shell)
52 ... Cushion material 53 ... Upholstery 541 ... Long hole support part (bearing part)
542 ... insertion hole (through hole)
55 ... locking member 551 ... mooring part, rotating shaft (rotating shaft)
552 ... engagement protrusion (insertion protrusion)
553 ... Elastic urging portion P ... Positioning position Q ... Retraction position X ... Seat receiving side engaging portion Y ... Seat plate side engaging portion (seat side engaging portion)

Claims (6)

With a seat
A seat plate slidably movable in the front-rear direction with respect to the seat;
Operates between a positioning position that is attached to one of the seat and the seat plate and positioned the seat plate at an arbitrary position with respect to the seat and a retracted position that allows the sliding movement of the seat plate relative to the seat A mooring portion that can be moored, a seat receiving side engaging portion that engages with the seat at a position different from the mooring portion at the positioning position, and a seat that engages with the seat plate so as not to be relatively movable. A locking member having a plate side engaging portion ,
The locking member is attached to the seat plate,
The seat receiving side engaging portion has an engaging protrusion provided so as to protrude downward to be able to be inserted into an engaging recess provided on the upward surface of the seat receiving,
A cushion material is further provided above the seat plate,
A chair characterized in that the cushion member can be pressed from above to the positioning position . The chair according to claim 1, wherein the seat plate side engaging portion is provided by penetrating the engaging protrusion from above in a through hole formed in the seat plate . The chair according to claim 1 or 2, wherein the locking member is attached to a rear end portion of the seat plate . The chair according to claim 1, 2, or 3, wherein the mooring portion is rotatably attached to the seat plate . While the mooring portion is a rotating shaft,
The chair according to claim 4, wherein the chair has a long hole support portion that supports the front and rear movements of the rotation shaft and is rotatably supported . The chair according to claim 1, 2, 3, 4, or 5, wherein the locking member includes an elastic biasing portion that accumulates an elastic repulsive force in a direction of moving to the positioning position at the retracted position .

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