JP2020039464A - Chair - Google Patents

Abstract

To simplify a structure of a device which unlocks a gas cylinder for seating.SOLUTION: A push valve 25 of a gas cylinder (leg support) 4 is pressed down by a pushing and moving component 9 forward tilting and rotating. To a seat outer shell 8, a relay link body 11 is linked horizontally rotatably, and the relay link body 11 and the pushing and moving component 9 are connected with a wire 12. To a free end of the relay link body 11, one end of an operation belt 13 is connected. A pull part 13a of the operation belt 13 is pulled outside from a slit hole 14 formed in the seat outer shell 8. When the operation belt 13 is pulled, the pushing and moving component 9 is inclined and unlocked. As the lever is unnecessary, the structure becomes simple.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a chair provided with a gas cylinder.

  2. Description of the Related Art In a chair, a gas cylinder is used for raising and lowering a seat and controlling locking of a backrest. In particular, in a swivel chair whose seat moves up and down, a gas cylinder is indispensable as a leg support. The gas cylinder is provided with a push valve (valve) for holding the locked state, and the push valve is operated by operating means. However, when the gas cylinder is provided as a leg support, the seated person can move around the seat. The operating member is operated around.

  In general, the operating means of the push valve often includes a rotary lever that is connected to the side surface of the seat or a seat outer shell that supports the seat and that is operated to be pulled upward. There is a case where the force is transmitted to the push valve by a rigid member such as a wire or a sheet metal product (for example, Patent Document 1), and a case where the force is transmitted to the push valve by a wire inserted into a tube (for example, Patent Document 2). In the case of a simple structure, there is a structure in which a finger hook portion and a pressing portion are formed on a single operation member made of wire or sheet metal.

JP 2008-99837 A JP 08-266363 A

  In a configuration having a pivotable lever as in the related art, there is a problem that the structure is complicated and it is difficult to suppress the cost, and there is a problem that the arrangement position of the members is restricted, so that design freedom is reduced.

  The present invention has been made to improve such a situation.

The present invention includes various configurations, and typical examples thereof are specified in each claim. Of these, the invention of claim 1 is:
`` The gas cylinder is used for raising and lowering the seat or for controlling the tilting of the backrest and other members. So,
The operating member is formed of a material that can be bent and deformed, a pull portion for a person to handle is exposed outside the seat portion, and the unlocking state of the gas cylinder by pulling the operating member or It has an interlocking member that locks. ''
It is a configuration. In the present invention, the handle portion of the operation member exposed to the outside of the seat may be constituted by an auxiliary member such as a ring for facilitating a finger to be put on by a person.

As for the operating member, various materials such as metal, resin, woven fabric, knitted fabric, and non-woven fabric can be adopted in terms of material, and various shapes such as band-shaped, round-shaped, band-plate-shaped, and chain-shaped can be used. Can be adopted, but the invention of claim 2
"The seat has a structure in which a cushion is stretched over a seat inner shell, and the seat inner shell is supported by a seat outer shell disposed thereunder,
The operating member is formed into a band with a flexible woven or knitted fabric, and a portion excluding the tab portion is disposed between the seat inner shell and the seat outer shell, and the tab portion is , Provided on the outer shell of the seat and pulled out from the slit hole. "
Is adopted.

The invention according to claim 3 is applied to a chair in which the leg support is constituted by a gas cylinder.
`` It has a base fixed to the upper end of the leg support composed of the gas cylinder, a seat outer shell fixed to the base, and a seat supported by the seat outer shell,
The seat outer shell is provided with, as the interlocking member, a vertically-rotatable pushing member that pushes a push valve of the leg post, and a relay link body that horizontally rotates at an upper surface of the seat outer shell. The relay link body and the pushing member are connected by a wire so that the pushing member pushes the push valve when the relay link body rotates horizontally in one direction,
In addition, one end of the operation member is connected to the relay link body such that the relay link body rotates in one direction by pulling the operation member, and the other end of the operation member is It is exposed to the outside through the slit hole formed in the seat outer shell. ''
It is a configuration.

According to a fourth aspect of the present invention, in any one of the first to third aspects,
"The handle of the operating member is formed as a ring into which a person can insert his / her hand."
It is a configuration.

  In the present invention, since the operating member is formed of a material that can be bent and deformed, a rotating lever is unnecessary, and a person can directly pull the operating member to unlock or lock the gas cylinder. be able to. Therefore, the operation mechanism of the gas cylinder can be simplified, which can contribute to cost reduction. In addition, since it can be formed into a novel form that has never existed in the past, it can contribute to an improvement in commercial value as a chair excellent in aesthetic sense. Further, since there is no need for a lever and there are few restrictions on the arrangement position of the operation member, design flexibility is high.

  Further, the conventional lever is rotated upward to release the lock, but the operating member of the present invention can release the lock by applying tension even when pulled upward or downward, so that the seat can be seated. The pulling mode can be selected according to the preference of the user. Therefore, there is an advantage that the operation mode can be enriched and the usability can be improved.

  The operating member can be formed of various materials in various shapes. However, when the operating member is formed into a band-like shape by a woven or knitted fabric, a commercially available tough tape can be used, which is advantageous in terms of cost. It is. Further, the woven or knitted fabric has a good appearance and is excellent in softness when pulled by hand. Furthermore, since the strap can be grasped firmly, the operability is excellent. Therefore, it is suitable as a specific example of the present invention.

  Further, it can be easily inserted into a slit hole formed in the seat outer shell. Furthermore, since the posture is held by the slit holes, the movement of the interlocking member can be ensured without being twisted by pulling. Since it is sufficient to provide only a slit hole as a means for supporting the operation member, the structure is simple.

  The invention according to claim 3 is applied to the operating means of the gas cylinder as a leg support. The pusher, the wire, and the relay link function as an interlocking member. Since it is only pulled, the movement of the operating member can be accurately transmitted to the movement of the pushing member. Therefore, high quality can be ensured by ensuring the movement.

  According to the third aspect, the other end of the operating member hangs downward from the slit hole provided in the seat outer shell. In this manner, the operating member can be pulled only by making a hole in the seat outer shell. Can be placed in Therefore, as in the second aspect, it is possible to surely contribute to the simplification of the structure. Further, as described above, since the pushing member can be rotated by pulling the operation member upward or downward, the usability is good.

  When the pull portion of the operating member is formed in the ring portion, the finger can be inserted into the ring portion and pulled, or the relay link body can be firmly gripped and pulled, thereby improving operability. it can.

It is a figure which shows the external appearance of a chair, (A) is a front perspective view, (B) is a front view, (C) is a side view. (A) is a perspective view of a state where a seat cushion and a backrest are separated, and (B) is a perspective view of a state where a seat inner shell is separated. (A) is an isolated perspective view, (B) is a perspective view seen from below. (A) is a perspective view of a main part, and (B) is a plan view of the main part. (A) is a perspective view of a main part, and (B) is a view of a wire. (A) is an exploded perspective view of a main part, (B) is a perspective view showing a relationship between an operation member and a relay link body, and (C) is a perspective view of a relay link body. It is a vertical side view of the principal part.

(1). Outline Next, an embodiment of the present invention will be described. The present invention is applied to a swivel chair used in an office or the like. First, an outline of a chair will be described with reference to FIGS. The chair includes a seat 1, a backrest 2, and a leg device 3. The leg device 3 includes five branch rods and a leg support 4 (gas cylinder), and a caster is provided at the tip of each branch rod.

  As shown in FIG. 3, a base 5 having a rectangular shape in a plan view is fitted to the upper end of the leg support 4. On the other hand, as shown in FIG. 2, for example, the seat 1 has a structure in which a seat cushion 7 is stretched over a seat inner shell 6 made of synthetic resin and covered with a skin material, and the seat inner shell 6 is a seat outer shell (made of synthetic resin). (Seat receiving member) 8. As can be understood from FIG. 3B, the seat outer shell 8 is formed with a boss portion 8a having a downwardly opened rectangular shape as viewed from the bottom, and the boss portion 8a and the base 5 are fitted to each other with screws. It is fixed.

  A push valve (to be described later) for releasing the lock protrudes from the upper end of the leg support 4, and the push valve is pushed down by, for example, a forward-tilt-rotatable pushing member 9 shown in FIG. The pushing member 9 is rotatably connected to the seat outer shell 8. A relay link body 11 is attached to a portion of the seat outer shell 8 in front of the pushing member 9 so as to be freely rotatable horizontally. The relay link body 11 and the pushing member 9 have balls (described later) at both ends. ) Are connected by a wire 12. The push member 9, the wire 12, and the relay link body 11 constitute an interlocking member described in the claims.

  As shown in FIG. 3B, one end 13b of an operation belt 13 as an example of an operation tool is locked to the relay link body 11. The other end of the operation belt 13 is a handle 13a, and the handle 13a is exposed downward from an elongated slit hole 14 formed in the outer shell 8 of the seat. The operation belt 13 is an example of an operation member, and when the pull portion 13a exposed outside the seat outer shell 8 is pulled, the relay link body 11 is horizontally rotated to rotate the pushing member 9 downward, As a result, the push valve of the leg support is pushed down, and the lock of the gas cylinder is released. The handle 13a of the operation belt 13 is a ring (loop).

  A forward facing portion 15 is integrally formed at the lower end of the backrest 2, while a left and right long metal reinforcing plate (reinforcing metal fitting) 16 is fixed to the rear upper surface of the seat outer shell 8. The backrest 2 is connected to the seat outer shell 8.

  A vertically long back support 18 located behind the backrest 2 is integrally formed at the rear end of the seat outer shell 8, and at the upper end of the back support 18, a left and right middle portion of the backrest 2. The upper and lower half-height portions are connected in a state that allows a slight forward and backward rotation.

(2) Elevating Operation Mechanism of Seat Next, the operation mechanism of the leg support 4 (elevating operation mechanism of the seat 1) will be described in detail mainly with reference to the drawings from FIG.

  For example, as shown in FIG. 7, a tapered bush 21 is fixed to an intermediate portion of the base 5 by welding, and the upper end of the leg post 4 is fitted to the bush 21 from below. As shown in FIG. 3 (A), upward bank portions 5a are formed at both left and right end portions of the base 5, while, as shown in FIG. Left and right downward opening portions 22 are formed, and screws (not shown) are inserted through holes 23 provided in the downward opening portions 22 and screwed into the bank portions 5 a of the base 5.

  As shown in FIG. 4A, a concave portion 24 is formed in a portion between the left and right downward opening portions 22, and the push valve 25 is exposed from the upper end of the leg support 4 at the concave portion 24. .

  For example, as shown in FIG. 6 (A), the push-moving member 9 is formed in a left-right longitudinally convex shape with a left-right intermediate portion having an upwardly projecting portion 9a, and is formed at both left and right ends at the rear and right and left outer sides. While the open bearing groove 26 is formed, a horizontal support shaft 27 in which the bearing groove 26 fits is protrudingly provided on the left and right inner side surfaces of the concave portion 24.

  In this case, the support shaft 27 is not a perfect circular shape but a prismatic shape, and has an inclined posture such that two vertices are positioned vertically in a side view. On the other hand, the bearing groove 26 of the pushing member 9 has a constricted portion, and is fitted to the support shaft 27 in a diagonally downward posture when viewed from the side, and cannot be pulled forward when returned to a horizontal posture when viewed from the side. Is set to Therefore, the pushing member 9 can be easily and irremovably attached to the support shaft 27.

  The pushing member 9 pivots downward (rotates forward) with the support shaft 27 as a fulcrum. When the support shaft 27 is positioned slightly behind the push valve 25, as shown in FIG. The front end of the member 9 contacts the push valve 25 on the upper surface. Therefore, when the pushing member 9 rotates downward, the push valve 25 is pushed down, and the lock of the leg support 4 is released.

  On the other hand, as shown in FIG. 6, the relay link body 11 is formed in a plate shape and in a copper dot shape narrowing in width from the base end to the front end, and the base end protrudes from the seat outer shell 8. The shaft 28 is horizontally rotatably connected to the support shaft 28. The relay link body 11 is irremovably held by the support shaft 28 by screws (not shown). One side of the relay link body 11 with respect to the rotation axis (the left side when viewed from the seated person) and one side of the upwardly protruding portion 9a of the pushing member 9 with the left and right intermediate position therebetween, As shown in FIG. 5B, they are connected by wires 12 having balls 29 attached to both ends.

  As can be understood from FIGS. 5 (A) and 6 (A), a wire formed at the base of the relay link body 11 so as to open upward into a ball hole 30 into which the ball 29 enters, and communicating with the ball hole 30. The routing groove 31 is open from the side to the back. On the other hand, as can be understood from FIG. 5, in the pushing member 9, the ball hole 30 opens laterally (leftward), and the wire routing groove 31 opens laterally, upwardly, and forwardly in an L-shape in plan view. Is formed. Therefore, the ball 29 is held in the relay link body 11 and the pushing member 9 so as not to come off.

  When the pushing member 9 is pulled forward by the wire 12, the pushing member 9 rotates forward. However, since the wire drawing groove 31 is also cut open forward, a part of the wire drawing groove 31 is Get into it. Thereby, the forward rotation of the pushing member 9 is allowed.

  For example, as clearly shown in FIG. 5, an inverted L-shaped locking projection 32 having an upper horizontal portion 32 a is integrally formed at the tip (free end) of the relay link body 11. One end 13b of the operation belt 13 is fitted and locked. The operation belt 13 is made of a woven or knitted fabric made of a resin thread, and has an eyelet (not shown) fitted to the locking projection 32 at one end 13b.

  For example, as shown in FIG. 5, the relay link body 11 is disposed so that the front end is located on the near side, and is inclined in plan view so that the front end is deviated leftward when viewed from the occupant. Therefore, when the operation belt 13 is pulled by the hand of the person, the relay link body 11 is horizontally rotated so that the tip is deviated rightward when viewed from the occupant. As a result, the ball hole 30 moves forward and the wire 12 is pulled forward. As a result, the pushing member 9 falls forward and the lock of the leg support 4 is released.

  The upper horizontal portion 32a of the locking projection 32 is for holding the operation belt 13 so that it does not come off. Keeps the state that does not come out. As means for preventing the operation belt 13 from slipping out, it is possible to fix a washer to the upper surface of the locking projection 32 with a screw. However, when the upper horizontal portion 32a is formed as a slip-off prevention as in the embodiment, the operation is prevented. There is an advantage that it is possible to reliably prevent the belt 13 from coming off while securing the ease of mounting the belt 13.

  As described above, the pull portion 13a of the operation belt 13 is drawn downward from the slit hole 14 formed in the side end portion of the seat outer shell 8, but is understood from FIGS. 4 (A) and 5 (A). The lower surface of the slit hole 14 is curved so that the operation belt 13 can be smoothly pulled. Since the operation belt 13 can be pulled upward, the upper surface of the slit hole 14 is also formed as a curved surface.

  For example, as shown in FIG. 4, the seat outer shell 8 has a container-like shape opened upward, and has a plurality of ribs 33 extending in the front-rear and left-right directions. It is set so that the ribs 33 of the left-right length and the front-back length are also located below. For this reason, the operation belt 13 is held in a state where it does not bend excessively by being placed on the rib 33. Further, as shown in FIG. 5, for example, an escape hole 34 is formed in the reinforcing plate 16 to prevent buffering between the pushing member 9 and the reinforcing plate 16.

(3). Conclusion As described above, in this embodiment, when the operation belt 13 is pulled, the lock of the leg support 4 is released, and the height of the seat 1 can be adjusted. In this case, the pulling portion 13a of the operating belt 13 may be pulled upward, or the pulling portion 13a may be pushed down (even if it is pushed down, the operating belt 13 is pulled, so the operating belt 13 is pulled. That is no different.) Since the height of the seat 1 is often adjusted while the hips are lifted, it may be easier for some people to push down the tab 13a of the operation belt 13 downward.

  The operation of the operation belt 13 may be performed by inserting a finger into the ring of the pull portion 13a, or may be performed by grasping the pull portion 13a. Since the handle 13a of the operation belt 13 is a ring and has a large volume, it is easy to grasp and operate.

  In many cases, the leg posts 4 are generally disposed slightly behind the front and rear intermediate portions of the seat 1, while the operation belt 13 is disposed at the front portion so that a seated person can easily operate. In this case, it is possible to directly pull the pushing member 9 by the operation belt 13, but in this case, in order to prevent the operation belt 13 from being twisted or caught and smoothly rotate the pushing member 9, The design may be cumbersome.

  On the other hand, when the horizontally rotating relay link body 11 is used as in the embodiment, the operation belt 13 is only subjected to simple tension in the longitudinal direction. Can be done. Therefore, the use of the relay link body 11 is preferable in implementing the present invention.

  As in the embodiment, when a method of fitting the support member 27 to the support shaft 27 is adopted as a means for attaching the pushing member 9, the attachment can be performed very easily. In addition, the bearing groove 26 is fitted into the support shaft 27 from the near side, and therefore, as described above, the bearing groove 26 can be easily mounted so as not to come off.

  When the operation belt 13 is adopted as the operation member, the thickness and the width can be arbitrarily set. Instead of using the operation belt 13, the operation member may be formed in a round string shape by using a string or the like woven with a resin thread as a material. Regardless of the operation belt 13 or the round string, the entire structure can be formed in a loop structure.

  Further, it is also possible to use a metal or resin chain, use a bendable metal wire, or use a metal or resin elastic plate as the operation member. Belts knitted (woven) with thin metal threads can also be used. It is also possible to attach a resin or metal ring or bar to the other end of the operation belt. Alternatively, it is possible to attach a ball as a pull to the other end of the operation member so that the ball can be firmly grasped by hand. It is also possible to attach a mascot doll or the like as a handle.

  Further, the present invention can be applied to a gas cylinder operating means for controlling the backward tilting of the backrest, a gas cylinder operating means for changing the posture of the seat, and the like. The operating member can be arranged on a seat, a base, or another seat receiving member (intermediate member) other than the seat outer shell.

  The relay link body 11 of the embodiment is an example of a relay member for converting the lateral pulling force of the operation member into the rotation of the pushing member 9, but the relay member may be a fixed type that is not a rotary type. Can be used. For example, it is possible to connect a wire to the rear end of the operation belt 13, change the direction of the wire backward by a fixed relay, and connect the rear end to the pushing member 9.

  The present invention can be embodied in a chair. Therefore, it can be used industrially.

DESCRIPTION OF SYMBOLS 1 Seat 4 Leg support | pillar which consists of a gas cylinder 5 Base 7 Seat inner shell 8 Seat outer shell as an example of a seat receiving member 9 Pushing member which comprises an interlocking member 11 Relay link body which constitutes an interlocking member 12 It constitutes an interlocking member Wire 13 Operation belt 13a as an example of an operation member 13a Pull part (other end) of operation belt
13b One end of operation belt 14 Slit hole (through hole) from which operation belt is pulled out
16 Reinforcement plate

Claims (4)

The gas cylinder is used for raising and lowering the seat, controlling the tilt of the backrest, and adjusting other members, and is provided with an operating member for unlocking or locking the gas cylinder by a manual pull operation by a person. hand,
The operating member is formed of a material that can be bent and deformed, a pull portion for a person to handle is exposed outside the seat portion, and the unlocking state of the gas cylinder by pulling the operating member or Equipped with an interlocking member for locking
Chair. The seat has a structure in which a cushion is stretched over a seat inner shell, and the seat inner shell is supported by a seat outer shell arranged thereunder,
The operating member is formed into a band with a flexible woven or knitted fabric, and a portion excluding the tab portion is disposed between the seat inner shell and the seat outer shell, and the tab portion is Is provided on the outer shell of the seat and is pulled out from the slit hole.
The chair according to claim 1. A base fixed to the upper end of the leg support composed of the gas cylinder, a seat outer shell fixed to the base, and a seat supported by the seat outer shell;
The seat outer shell is provided with, as the interlocking member, a vertically-rotatable pushing member that pushes a push valve of the leg post, and a relay link body that horizontally rotates at an upper surface of the seat outer shell. The relay link body and the pushing member are connected by a wire so that the pushing member pushes the push valve when the relay link body rotates horizontally in one direction,
In addition, one end of the operation member is connected to the relay link body such that the relay link body rotates in one direction by pulling the operation member, and the other end of the operation member is It is exposed to the outside from the slit hole formed in the seat outer shell,
The chair according to claim 1. The pull portion of the operating member is formed in a ring portion into which a person can insert a hand.
The chair according to any one of claims 1 to 3.

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