JP2530556Y2 - Chair - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a chair.

(Prior Art) The present applicant has previously provided a chair capable of holding the backrest by arbitrarily inclining it by operating a lever (Japanese Utility Model Application Laid-open No.
189562). FIG. 4 is an explanatory view showing the structure of this chair.

In the figure, 10 is a seat receiving body for receiving a seat, 12 is a backrest, 14 is a pillar, and 16 is a support member fixed to the pillar 14. Backrest
12 is fixed to and supported by the rear end of the backrest mounting rod 15. The backrest mounting rod 15 is rotatably supported by the seat receiving body 10 at an intermediate position, and the front end of the backrest mounting rod 15 is linked to the support member 16 via a link member 17. Reference numeral 20 denotes a telescopic body with a lock mechanism provided between the support member 16 and the backrest 12.

The above link mechanism supports the backrest 12 when the backrest 12 tilts backward.
When the backrest 12 tilts forward, the rear side of the seat receiver 10 operates so as to rise. Elastic body 20
Is arranged to be compressed when the backrest 12 is tilted backward.

An operation lever 22 is connected to the telescopic body 20 via an operation lever 24. The operating lever 24 abuts on a push valve body provided at the protruding end of the telescopic body 20, and operates the operating lever 22 to push the push valve body to operate the locking mechanism of the telescopic body 20. By operating the operation lever, the backrest can be freely tilted.

(Problems to be Solved by the Invention) The above-mentioned conventional chair obtains a reaction force when the backrest 12 is tilted by the elastic force of the elastic body 20.
Since the space for disposing is restricted, a large-diameter elastic body having a sufficiently large reaction force cannot be arranged. Recently, there is a demand in the market to use the above chair so that it can be locked, but as described above, the spring force required for locking cannot be obtained as it is because the reaction force of the elastic body is insufficient. .

Usually, a rocking chair is provided with a special mechanism for locking, and in order to attach this special mechanism to the above chair, a production line must be newly prepared, and the special mechanism is not provided. There were problems that the delivery time was delayed and the cost was high because of replacement and installation.

Therefore, the present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a chair that can easily attach a locking mechanism using the conventional chair. Things.

(Means for Solving the Problems) The present invention has the following configuration to achieve the above object.

That is, a support member (16) having a side plate (16a) disposed at an upper end of a pillar (14) so as to face a predetermined interval.
Is fixed, and a seat receiver (10) for receiving a seat by a pin (30) is pivotally supported on the upper side of the support member (16) so that the rear side can swing up and down, and the seat receiver ( 10) A back mounting rod (15) is pivotally supported at a rearward position from below by a pin (32) in the middle position by a pin (32) in a front-rear direction at a halfway position, and when the back (12) tilts backward, The front end of the backrest mounting rod (15) is pin (34) so that the rear side of the seat receiver (10) is lowered and the rear side of the seat receiver (10) is raised when the backrest (12) leans forward. ), The other end of the link member (17) is pivotally supported by the support member (16) via a pin (36), and the backrest mounting rod ( An extendable body (20) for urging the backrest (12) in a direction for tilting forward is provided between the extended end side of 15) and the support member (16). In the chair provided, the support member (16) is hung between the side plates (16a) of the support member (16) at a position below the seat support (10) and behind the pin (30) that supports the seat support (10). A support (42) is arranged to extend, and a coil spring (40) for elasticity is arranged between the support (42) and the lower surface of the seat receiver (10).

(Operation) When the backrest 12 is tilted backward, the back side of the seat receiver 10 is lowered by the linking action of the backrest mounting rod 15 and the link member 17, and at this time, a coil spring disposed between the lower surface of the seat receiver 10 and the support member 42 The resilience of 40 creates a reaction force that returns the backrest 12. The resilience of the coil spring 40 is added to the reaction force of the telescopic body 20, and the locking effect of the backrest 12 is suitably exhibited.

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is an explanatory view of the chair according to the present invention viewed from the side, and FIG. 2 is a plan view.

The configuration of each part such as the seat receiving body 10, the backrest 12, the pillar 14, and the like is exactly the same as the above-described conventional example. That is, the support member 16 is fixed to the pillar 14, and the support member 16 is provided above the support member 16.
The seat receiver 10 is arranged so as to cover 16. At the front end of the support member 16, the rear side of the support member 10 is pivotally supported by a pin 30 at the front end of the support member 16 so as to be swingable. The pin 30 is provided so as to extend between the front ends of the support member 16 as shown in FIG.

The backrest mounting rod 15 has a backrest at its rear end.
12 are connected, pivotally supported by the seat receiving body 10 by pins 32 at a halfway position, and engaged with the link member 17 by pins 34 at the front end. Link member 17 is pin 36
With the support member 16 is engaged.

The mechanism of the telescopic body 20 and the operation lever 22 for operating the telescopic body 20 is the same as that of the conventional example, and the description is omitted.

Next, a resilient mechanism newly provided to add the above-mentioned conventional mechanism locking function will be described.

The resilient mechanism includes a coil spring 40 which is an elastic body, and a support 42 for setting the coil spring 40 between the seat receiver 10 and the support member 16. The support 42 is a flat plate-shaped member, and the width of the support 42 is formed so as to extend from substantially the center of the support member 16 to the upper edge of the rear side plate 16a. The distance between the side plates 16a, 16a on both sides of the support member 16 from the substantially central position to the rear side is formed to be narrow, and the support body 42 is supported by the narrowed portion. As shown in FIG. 2, the support 42 is formed with a cutout on one of the rear side so that the elastic body 20 does not come into contact when the elastic body 20 is tilted. FIG. 3 shows a planar arrangement of the support member 16 and the support 42. One side plate 16a is bent at the rear end side in accordance with the width dimension of the shaft support position of the elastic body 20, and is further narrowed.

A circular projection 44 into which the coil spring 40 is fitted is provided on the upper surface of the bulging portion of the support 42. The coil spring 40 is provided so as to urge between the seat receiving member 10 and the support member 42 so as to be resilient.

Note that the support member 42 is connected to the backrest mounting rod 15 and the link member.
Positioning is carried out so as to be hooked on a pin 34 linking the link 17 and 17. For this reason, the front end of the support 42 is raised as shown in FIG.
A lock pin 48 is provided upright at a position straddling the.

The above-described resilient mechanism is mounted on a conventional chair as follows.

First, the pin 32 linking the seat receiving body 10 and the backrest mounting rod 15 is pulled out, and the seat receiving body 10 is opened by lifting the rear side around the pin 30 as an axis. Next, the support 42
The support 42 is set on the support member 16 such that the pin 34 is hooked between the locking projection 46 and the locking pin 48. Since the coil spring 40 is set upward on the support 42, the seat support 10 is placed on the top plate of the seat support 10 so as to hold down the coil spring 40, and the seat support 10 and the backrest mounting rod 15 And again through pin 32. Thus, the elastic mechanism can be mounted.

The coil spring 40 is always resilient between the seat receiver 10 and the support member 16, and when the backrest 12 is tilted backward, the coil spring 40 acts in the direction of being compressed and returned, thereby obtaining a locking effect. be able to.

As described above, the resilient mechanism of this embodiment has a great number of advantages in that the components of the conventional chair can be used as they are, and a locking function can be provided only by attaching an elastic member such as a coil spring. . That is, since the resilient mechanism for providing the locking function is composed of simple components such as a coil spring, there is no need for a special manufacturing line for manufacturing a dedicated mechanism, or the existing mechanism is modified. No need to use the current mechanism as it is, so the current production line can be used as it is, the existing chair can be used as it is, and after-sales service can be easily done, it can be installed by extremely easy operation such as inserting and removing pins There is an advantage that mounting work is extremely easy because it is possible.

As described above, the present invention has been described in various ways with reference to preferred embodiments. However, the present invention is not limited to this embodiment, and it is needless to say that many modifications can be made without departing from the spirit of the invention. That is.

(Effects of the Invention) As described above, the chair according to the present invention has a suitable locking action by using the components of the chair such as the seat receiver, the support member, the backrest mounting rod, and the telescopic body completely in common with the conventional product. Can be provided. In particular, in the present invention, the coil spring is mounted on the support by extending the support between the side plates of the support member, so that the coil spring can be mounted or removed by a simple operation. Also,
By mounting the coil spring on the rear side of the pin for pivotally supporting the seat body, the resilient force of the coil spring can be directly applied to the seat body and a suitable locking effect can be exerted. Further, by mounting the coil spring in the space between the seat receiver and the support member, it is possible to provide a product having no difference in appearance from a conventional product, and has a remarkable effect.

[Brief description of the drawings]

1 and 2 are a side view and a plan view of main components of the chair according to the present invention, FIG. 3 is an explanatory view showing a plan layout of a support member and a support, and FIG. FIG. 3 is an explanatory diagram showing a configuration. 10 ... seat support, 12 ... backrest, 14 ... pedestal, 15 ...
Backrest mounting rod, 16 ... Support member, 16a ... Side plate, 17 ...
... Link member, 20 ... Telescopic body, 22 ... Operation lever, 24 ...
… Actuating lever, 30, 32, 34, 36, 37… pin, 40… coil spring, 42… support, 44… projection, 46… locking projection, 48… locking pin

Claims (1)

(57) [Scope of request for utility model registration] 1. A support member (16) having a side plate (16a) disposed at an upper end of a pillar (14) and opposed at a predetermined interval.
A seat receiver (10) for receiving a seat by a pin (30) is pivotally supported on the upper side of the support member (16) so that the rear side can swing up and down, and the seat receiver ( 10) A back mounting rod (15) is pivotally supported at a rearward position from below by a pin (32) in the middle position by a pin (32) in a front-rear direction at a halfway position, and when the back (12) tilts backward, The front end of the backrest mounting rod (15) is pin (34) so that the rear side of the seat receiver (10) is lowered and the rear side of the seat receiver (10) is raised when the backrest (12) leans forward. ) And one end of the link member (17).
The other end is pivotally supported by the support member (16) via a pin (36), and a backrest (12) is provided between the extending end of the backrest mounting rod (15) and the support member (16). In a chair provided with a telescopic body (20) for urging in a forwardly tilting direction, a position on the rear side of a pin (30) that supports the seat receiver (10) below the seat receiver (10). A support (42) is disposed so as to extend between the side plates (16a) of the support member (16), and a spring coil is provided between the support (42) and the lower surface of the seat receiver (10). A chair in which a spring (40) is arranged.