JP3295651B2 - Chair support structure of chair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for supporting a member in a chair (a structure for mounting a member and a member so as to be relatively movable by a shaft).

[0002]

2. Description of the Related Art In a chair provided with a movable member, such as a chair in which a backrest tilts backward and a seat body slides back and forth, a space is provided between a movable member and a fixed member. In many cases, rotation or sliding of the movable member is permitted by inserting a shaft into the hole via a bearing or directly.

In this case, in order to smoothly rotate or slide the movable member without generating a rubbing sound, it is preferable to lubricate the contact surface between the shaft and the bearing or the member.

[0004] In this case, it is practically impossible to lubricate the user with lubrication, so grease that does not require lubrication is used as lubrication means. Conventionally, grease is merely applied to the lubrication points. Was.

However, even if grease is used, it does not mean that the grease is not dripped at all. Rather, the grease may be melted by the frictional heat between the member and the shaft and dripped downward, or grease that has excessively adhered may drop due to impact or the like. Therefore, there is a concern that the floor and the like may be stained with the dripping grease.

An object of the present invention is to solve this problem.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a seat receiving body and the like.
Insert the shaft through a hole provided in the member via a bearing, and
The grease was applied to the contact surface with the bearing, further wherein
On the outside of the member, dripping from between the shaft and the bearing
Cap with a pocket to receive the grease
In the chair being arranged , the bearing is provided with the shaft
Form the part that protrudes outside the member along the axial direction
The overhanging portion has an engaging portion, and the cap
To move the cap upwards from below.
So that the locking part locks to the engaging part due to deformation against resistance
By forming each, the overhang is
The feature is that the cap is held so as not to fall .

In this case, when the end of the shaft is exposed to the outside of the member, for example, as in a shaft in which a seat body is slidably attached to a seat receiving body in a front-rear direction, the present invention is described in claim 2. Preferably, the end of the shaft is covered with a cap.

[0009]

According to the present invention, even if the grease drips, the dropped grease can be received by the cap, so that the floor and the like can be prevented from being stained with the grease. Therefore,
The shaft can be accurately lubricated in a state where the floor and the like are reliably prevented from being contaminated.

Further, according to the present invention, since the cap also serves as a cover for the end of the shaft (in other words, the cover for the shaft also serves as a grease receiver),
There is no problem such as aesthetics or injury due to the end of the shaft being exposed, or the clothes getting stuck, and there is an advantage that the problem relating to the aesthetics and safety and the dirt due to the dripping of grease can be eliminated at once with a single member.

[0011]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a side view of a chair, and FIG. 2 is a II-II of FIG.
FIG. 3 is a side view taken along the line III-III of FIG. 2, and FIG.
IV-IV view, FIG. 5 is an exploded perspective view of a main part, and FIG.
It is a VI-VI sectional view.

<< Basic Configuration >> As shown in FIGS. 1 and 2, the chair includes a seat body 1, a backrest 2, and a leg support 3, and a box-shaped upper opening is provided at the upper end of the leg support 3. Is mounted.

A support plate 5 is fixed to the lower surface of the seat 1, and a downward front bracket 5a is formed on the support plate 5 so as to extend to the left and right outside of the front portion of the seat receiver 4. The first shaft 6 is inserted through the portion 5a and the left and right side plates 4a of the seat receiver 4.

The backrest 2 is attached to a back support member 7, and the back support member 7 has a pair of arm portions 7a extending to the side surface of the seat receiver 4 outside the left and right brackets 5b of the support plate 5. And the second shaft 8 penetrates through the distal ends of both arm portions 7a and the left and right side plates 4a of the seat receiver 4.
The third shaft 9 passes through the front and rear halfway portions of the arm portion 7a and the left and right side plates 5a of the support plate 5.

As shown in FIG. 4 and FIG. 5, a long mounting hole 10 is provided in the front portion of the left and right side plates 4a of the seat receiving body 4 in a rearwardly inclined manner, and is fitted into the mounting hole 10 from outside. The first shaft 6 is inserted into the bearing 11. The bearing 11 has an elongated hole 12 so that the first shaft 6 can slide. The bearing 11 is preferably made of synthetic resin, but may be made of metal.

A bearing 13 is provided with a cap 13 made of synthetic resin from below (details will be described later).

For example, as shown in FIG.
The spring 15 is supported by a pair of front and rear spring receivers 14 fitted on the shaft 8. Therefore, when a person sitting on the chair leans against the backrest 2, the backrest 2 and the back support member 7 tilt backward about the second shaft 8 against the spring 15 and the seat 1
Moves backward along the elongated hole 12 of the bearing 11 while tilting backward at a gentle angle.

Although not shown in the drawings, the first shaft 6 and the second shaft 8 are provided with a collar or a stopper for preventing the spring receiver 14 from shifting. A gas cylinder may be used instead of the spring 15.

{Structure of Bearing} As shown in FIGS. 3, 5, and 6, the bearing 11 of the first shaft 6 includes an oval cylindrical portion 11a that fits into the elongated hole of the seat 4 and a seat 4 And a wall-shaped ridge 11c integrally provided on a peripheral edge of a substantially lower half portion of the flange portion 11b.

As clearly shown in FIG. 3 and FIG.
The outer peripheral surface of the portion 11b is in a state in which the lower half connected to the ridge 11c protrudes more outward than the upper half.
Step portions 16 as an example of an engaging portion are formed at both left and right end portions of the flange portion 11b.

Further, as clearly shown in FIG.
It is formed so as to protrude radially outward from the flange portion 11b, Therefore, the outer periphery of the flange portion 11b and the protrusion 11
The shape is different from c.

The first shaft 6 is fitted in a mounting hole 18 of the front bracket 5a via a bush 17 made of synthetic resin or the like.
Portion overlapping the bearing 11 of the bush 17 is set to be larger in diameter, the large diameter portion 17a of the bush 17 is set to a diameter such as small gap is formed between the flange portion 11b of the bearing 11 .

A head 6a is formed at one end of the first shaft 6 shown in FIG. 6, and a snap ring (push nut) not shown is fitted to the other end. Snap rings may be attached to both ends.

Grease G is filled in a contact portion between the first shaft 6 and the bearing 11 and the bush 17 and a slight gap between the bearing 11 and the bush 17 (see FIG. 6).

{Structure of Cap} The cap 13 and the front bracket 5a of the support plate 5
The shaft 6 is formed in such a size as to completely cover the end portion thereof, and has a pocket portion (grease receiving portion) 13a opened upward on the back side thereof.

The rear end plate 13b of the pocket portion 13a has a shape cut out so as to overlap the lower half of the flange portion 11b of the bearing 11, and both ends of the rear end plate 13b are provided with locking portions. As an example, the flange portion of the bearing 11
A locking claw 19 that is hooked from above and engaged with the step 16 of 11b is integrally provided.

Therefore, the cap 13 can be mounted in a one-touch manner without falling down by fitting the cap 13 from below into the flange portion 11b of the bearing 11 against the elasticity of the pocket portion 13a of the cap 13. Ridge 11c
Is held so as not to be displaced outward.

The cap 13 is attached to the bearing 11 and is immovable, while the front bracket 5a of the support plate 5 moves back and forth along the elongated hole 12 together with the first shaft 6. For this reason, FIG.
The pocket of the cap 13 so that it can be easily understood from
13a is set to a size that allows the front bracket 5a to move back and forth and tilt backward.

{Summary} In the above configuration, as shown in FIG. 6, even if the grease G drips downward due to frictional heat or the like for some reason, the dripping grease G accumulates in the pocket 13a of the cap 13. Since it does not fall under the floor, the floor is never dirty. Further, since both ends of the first shaft 6 are covered with the caps 13, the appearance is good, and the end of the first shaft 6 is not touched by a person to be injured or clothes are not caught.

When the cap 13 is attached by the locking claws 19 as shown in the drawing, there is an advantage that the attaching operation is extremely simple. In addition, since the cap 13 is mounted so as not to be displaced outward, the first shaft 6 can be prevented from coming off without providing the head 6a or the snap ring at both ends of the first shaft 6. That is, the cap 13 may also be used as a tool for preventing the first shaft 6 from coming off.

When the synthetic resin cap 13 is attached to the synthetic resin bearing 11 as in the embodiment, the step 16 and the locking claw 19 can be easily formed, so that the structure is simple. Alternatively, there is an advantage that the present invention can be applied to the existing seat receiver 4.

Further, if a ridge 11c is provided in the lower half of the bearing 11, the grease G is received by the ridge 11c.
There is an advantage that the dripping of the grease G can be suppressed and lubrication can be performed for many years.

<< Others >> Although the above embodiment is applied to the slide-type first shaft 6, it may be applied to lubrication of other shafts such as the second shaft 8 and the third shaft 9 .

Further, the form of the caps can be variously changed as necessary.

[Brief description of the drawings]

FIG. 1 is a side view of a chair.

FIG. 2 is a plan view taken along the line II-II of FIG.

FIG. 3 is a side view taken along the line III-III of FIG. 2;

FIG. 4 is an IV-IV view of FIG. 3;

5A is an exploded perspective view of a main part, and FIG. 5B is a perspective view of the cap viewed from the back side.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Seat 2 Backrest 4 Seat receiver 5 Support plate 5a Front bracket part 6 1st axis (slide axis) 7 Back support member 11 Bearing 11b Flange part 11c Ridge 12 Slot 13 Cap 13a Pocket 16 steps (engagement) Part) 19 locking claw

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁷ , DB name) A47C 7/00 A47C 3/026 A47C 7/14 A47C 7/44 F16H 57/00-57/04

Claims (2)

(57) [Claims] 1. A bearing is inserted through a hole provided in a member such as a seat receiving body.
Inserting the shaft and the shaft and coating the grayed <br/> squirrel the contact surface with the bearing, further, on the outside of said member, said shaft and before
Pocket for receiving grease dripped from between the bearing
Chair with a cap with a socket
Te, the bearing, the outer of said member along the axial direction of the shaft
A protruding portion is formed on the side, an engaging portion is formed on the protruding portion, and an engaging portion is formed on the cap.
When the cap is moved upward from below, the stopper is resistant to elasticity.
So that the locking part locks to the engaging part due to the deformation
Forming the cap on the overhang.
A support structure for a member of a chair, wherein the chair is held so as not to fall . 2. The structure for supporting a member of a chair according to claim 1, wherein the end of the shaft is exposed outside the member, and the end of the shaft is covered with the cap. .