JP3409256B2 - Articulated 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 connecting chair which is mainly used in a theater, a hall or the like and which is provided with a plurality of seat members connected to a supporting frame so that the seat members can be individually rotated.

[0002]

2. Description of the Related Art A conventional connecting chair is disclosed in, for example, Japanese Patent Laid-Open No. 8-15.
No. 4771 will be described as an example. As shown in FIGS. 7 and 8, the connecting chair is roughly configured by one support frame 101, a plurality of seat members 102, and a plurality of backrest members 103 (not shown in FIG. 7). Support frame 10
Reference numeral 1 denotes two main legs 104, 104 installed on the floor, a connecting rod 105 hung between the main legs 104, 104, and side legs 106, 106 fixed to both ends of the connecting rod 105.
And the middle legs 107, 107 fixed in the middle of the connecting rod 105.
Composed of. A bearing member 108 having a concave shape in a side view and a detent 109 bent into a “V” shape are welded to the inner surface of the side leg 106 and both side surfaces of the middle leg 107. An armrest 110 is attached to the tops of the side leg 106 and the middle leg 107.

On the other hand, the seat member 102 has a rotating shaft 111 and locking projections 112 projecting to both side surfaces on the rear side. The rotating shaft 111 is rotatable with respect to the seat member 102 and is biased in a fixed rotation direction by a known biasing means incorporated inside the seat member 102.

However, each seat member 102 has a side leg 106.
And the middle leg 107 are set one by one between the legs and the side leg 106
Then, the rotary shaft 111 is fitted to the bearing member 108 of the middle leg 107 and is stopped by a fixing means such as a screw. As a result, the seat member 102 is rotatable about the rotating shaft 111, and is automatically erected by the above-described urging of the rotating shaft 111 when the seat member 102 is not loaded, that is, when the seat member 102 is not seated. (See the chain double-dashed line in FIG. 8). The seat member 102
The locking projection 112 engages with the detents 109 of the side leg 106 and the middle leg 107 and stops at a substantially horizontal seating position.
Therefore, the rotation range of the seat member 102 is between a substantially horizontal sitting position and a substantially vertical standing position.

[0005]

Conventionally, the seat member 10 has been used.
The bearing member 108 supporting the rotating shaft 111 of the second leg is attached to the middle leg 1.
Since it was welded to the side of 07, the middle leg 107
It was necessary to separately weld the bearing members 108 to both surfaces of each. Therefore, there is a problem that the cost increases due to the time and effort required for welding the bearing member 108.

The present invention has been made in view of the above, and an object thereof is to provide a low cost connecting chair.

[0007]

In order to achieve the above object, the present invention is directed to a side leg located at both ends of a support frame, a middle leg located in the middle of the support frame, and a substantially horizontal seat between the legs. position and has a seat member which is mounted so as to be rotatable between a substantially vertical upright position, the following (a) ~
Provided is a connecting chair having the requirements of (d). (A) The middle leg is formed of a square pipe and the square pie
So that the front or rear surface of the seat corresponds to the center of rotation of the seat member
Set the position to. (B) On the front surface or rear surface of the middle leg, the concave shape in side view
One long bearing member from the front of the middle leg to both side seat members
Secure by sticking both ends to the side. (C) The bearing member is provided on the upper edge of the non-intermediate leg that is concave in side view.
Fold back to the middle leg to form a reinforcing part that connects with the middle leg, and
The opening that allows the pivot of the seat member to pass through the part that protrudes toward the seat member
It has a mouth . (D) Fitting the left and right ends of the bearing member to the rotary shaft of the seat member
As a shaft holding part to hold together, one bearing member is adjacent
It is shared by two seat members that fit.

The middle leg is formed of a square pipe, and the position is set so that the front surface or the rear surface of the square pipe corresponds to the center of rotation of the seat member. If it is shared by two seat members that fit together, the work of fixing the bearing member to the middle leg can be completed once .

Further, the bearing member has a concave shape in a side view.
Reinforcement part that folds back to the middle leg side at the upper edge of the leg side and connects with the middle leg
And the seat member is formed in the portion protruding toward the seat member side.
Since the opening that allows the rotation axis of the
Required and sufficient strength to support the seat members on both sides with the receiving member
Since the rotating shaft is covered with the reinforcing portion, the bearing portion has a neat appearance, and there is no risk of finger injury due to burrs or edges of the bearing member.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view showing a support frame and a seat member, FIG. 2 is a sectional view showing a main part of a connecting chair, FIG. 3 is a perspective view of a middle leg seen from the rear side, FIGS.
FIG. 6 is a side view of an essential part showing another form of the bearing member, and FIG. 6 is a perspective view of an essential part showing another form of the bearing member.

The connecting chair of the present invention has a schematic structure including one support frame 1, a plurality (for example, three) seat members 2, and a plurality (for example, three) backrests 3 (not shown in FIG. 1). To be done. The support frame 1 is composed of side legs 4 and 4 located at both ends, middle legs 5 and 5 located in the middle, and a connecting rod 6 connecting all the legs 4 and 5, Each of the legs 5 is directly fixed to the floor.

On the other hand, the seat member 2 has a rotating shaft 7 projecting from both sides of the rear side, and a locking projection 8 projecting from both sides of the rear side to the rear side. The rotating shaft 7 is rotatable with respect to the seat member 2 and is urged in a constant rotational direction by a known urging means incorporated inside the seat member 2.

The side leg 4 and the middle leg 5 of the support frame 1 are
The front surface is set at a position corresponding to the center of rotation of the seat member 2. Therefore, the side leg 4 and the middle leg 5 of the present invention are located rearward of the side leg 106 and the middle leg 107 of the conventional connecting chair. The side leg 4 and the middle leg 5 are formed of square pipes and have a proper width on the front and rear surfaces, and a bearing member 9 is fixed to the front surface. The bearing member 9 includes a shaft holding portion 10 having a concave shape in a side view for fitting and holding the rotating shaft 7 of the seat member 2, and a shaft holding portion 10.
The upper edge of the non-intermediate leg side of the
The reinforcing portion 11 is welded to. The shaft holder 10
It is also fixed to the middle leg 5 by welding itself.

The bearing member 9 fixed to the middle leg 5 is formed so that both ends thereof are projected from the front of the middle leg 5 to the seat members 2 on both sides, and the reinforcing portion 11 of the protruding portion and the shaft holding. An opening 12 is provided between the portions 10 to allow the rotation shaft 7 of the seat member 2 to pass therethrough. On the other hand, the bearing member 9 fixed to the side leg 4 is the same as the bearing member 9 fixed to the middle leg 5, except that the bearing member 9 projects from the front surface of the side leg 4 only to one seat member 2 side. Is.

On the other hand, the connecting rod 6 of the support frame 1 is
Instead of a single continuous pipe, a plurality of pipes (3) are formed via the connecting members 6a fixed (welded) to the rear surfaces of the side legs 4 and the middle legs 5.
It is made by connecting square pipes 6b). That is, the connecting member 6a is formed by extending an auxiliary piece 6e along the side leg 4 or the middle leg 5 at the front edge of the opening 6d of the U-shaped main body portion 6c, and the auxiliary piece 6e is attached to the side leg 4 and the middle leg 5. Welding to the rear surface, at least the main body portion 6c is projected to one side of the side leg 4 and both sides of the middle leg 5, respectively, and the square pipe 6b is fitted from the opening 6d of the main body portion 6c as shown by the arrow x in FIG. The square pipe 6b is fixed through bolts (not shown) from through holes 6f formed in the upper and lower portions of the main body portion 6c.

In addition, reference numeral 13 in FIGS. 1 to 3 is a rotation stopper fixed to the rear surfaces of the side legs 4 and the middle leg 5, and 14 is an armrest 15 protruding from the tops of the side legs 4 and the middle leg 5 (see FIG. 2). It is a mounting base for.

However, each seat member 2 has a side leg 4 and a middle leg 5.
One by one is set between the legs, and the rotating shaft 7 is fitted to the bearing members 9 of the side leg 4 and the middle leg 5 and fixed by the fixing means 16 such as a screw. The rotating shaft 7 is fitted into the bearing member 9 by passing the rotating shaft 7 through the opening 12 of the bearing member 9 as shown by arrow (y) in FIG. 3 and then rotating it as shown by arrow (z) in FIG. The moving shaft 7 may be lowered and stored in the shaft holding portion 10. Since the shaft holding portion 10 of the bearing member 9 is provided with the screw hole 17, and the end of the rotating shaft 7 is formed with a slight recess ((not shown)), the screw hole 17 is formed. The tip of the rotary shaft 7 is passed through the screw 16.
By tightening so as to engage with the recess, the rotary shaft 7 can be fixed to the shaft holding portion 10 in a non-rotatable state.

In this state, the seat member 2 is rotatable around the rotary shaft 7, and no load is applied to the seat member 2.
That is, in the state where the user is not seated, it automatically stands up by the urging of the rotating shaft 7 described above. In the seat member 2, the locking projection 8 engages with the detents 13 of the side leg 4 and the middle leg 5 and stops at a substantially horizontal seating position. Therefore, the rotation range of the seat member 2 is between a substantially horizontal sitting position and a substantially vertical standing position.

Although the present invention has been described with reference to the embodiments, the present invention is not of course limited to the above embodiments. For example, in the embodiment, the bearing member 9 is provided on the front surface of the side leg 4 and the middle leg 5, but as shown in FIG.
It may be provided on the rear surface of the. In this case, the side legs 4 and the middle legs 5 are located in front of the conventional connecting chair. Further, in the embodiment, the reinforcing portion 11 of the bearing member 9 is replaced with the shaft holding portion 1.
Although it is provided on the upper surface of 0, the tip bottom surface of the shaft holding portion 10 may be supported by the reinforcing portion 11 as shown in FIG. Further, in the embodiment, the opening 12 of the bearing member 9 is provided on the rear side, but as shown in FIG. 6, the opening 1 is formed on the front side of the bearing member 9.
Two may be provided.

Further, in the embodiment, the side leg 4 and the middle leg 5 are directly attached to the floor, but the side leg 106 and the middle leg 107 are attached to the connecting rod 105 like the connecting chair shown as the conventional example. It is also applicable to the type. Further, in the embodiment, the locking projection 8 is projected on the rear side of the seat member 2 and is applied to the detents 13 of the side leg 4 and the middle leg 5 so as to restrict the rotation range of the seat member 2. However, the means therefor is not particularly limited. Needless to say, the number of seat members 2 for one support frame 1 may be any number.

Furthermore, in the embodiment, the side leg 4 and the middle leg 5 are provided.
Although the detent 13 is attached to the rear surface as an independent component, the connecting rod 6 including the connecting member 6a may be used as the detent 13. The bearing members 9 are attached to the front surfaces of the side legs 4 and the middle legs 5, and the rotation stoppers 13 are attached to the rear surfaces.
If the side leg 4 and the middle leg 5 are manufactured at a very low cost by using an off-the-shelf square pipe, there is an advantage.

[0022]

According to the present invention, the middle leg is formed of a square pipe, and the position is set so that the front surface or the rear surface of the square pipe corresponds to the center of rotation of the seat member, and the bearing member is fixed thereto. Since one bearing member is shared by two adjacent seat members, the work of fixing the bearing member to the middle leg is completed once. Therefore, the labor required for mounting the bearing member is reduced by half, and the cost can be surely reduced accordingly. Moreover, since the middle leg is a square pipe, the cost can be further reduced by using a ready-made square pipe.

The bearing member has a concave shape in a side view.
Reinforcement part that folds back to the middle leg side at the upper edge of the leg side and connects with the middle leg
And the seat member is formed in the portion protruding toward the seat member side.
Since the opening that allows the rotation axis of the
Required and sufficient strength to support the seat members on both sides with the receiving member
Since the rotating shaft is covered with the reinforcing portion, the bearing portion has a neat appearance, and there is no risk of finger injury due to burrs or edges of the bearing member.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a support frame and a seat member.

FIG. 2 is a cross-sectional view showing a main part of a connecting chair.

FIG. 3 is a perspective view of the middle leg viewed from the rear side.

FIG. 4 is a side view of an essential part showing another form of the bearing member.

FIG. 5 is a side view of a main part showing another form of the bearing member.

FIG. 6 is a perspective view of a main part showing another form of the bearing member.

FIG. 7 is an exploded perspective view of a support frame and a seat member according to a conventional technique.

FIG. 8 is a sectional view of a main part of a connecting chair showing a conventional technique.

[Explanation of symbols]

1 ... Support frame 2 ... Seat member 4 ... Side leg 5 ... Middle leg 7 ... Rotation axis 9 ... Bearing member 10 ... Shaft holding part 11 ... Reinforcement part 12 ... Opening

Claims (2)

(57) [Claims] 1. Side legs located at both ends of the support frame,
A middle leg located in the middle of the support frame, and a seat member rotatably mounted between the legs between a substantially horizontal sitting position and a substantially vertical standing position, and the following ( a) ~
A connection chair characterized by comprising the requirements of (d)
Child. (A) The middle leg is formed of a square pipe and the square pie
So that the front or rear surface of the seat corresponds to the center of rotation of the seat member
Set the position to. (B) On the front surface or rear surface of the middle leg, the concave shape in side view
One long bearing member from the front of the middle leg to both side seat members
Secure by sticking both ends to the side. (C) The bearing member is provided on the upper edge of the non-intermediate leg that is concave in side view.
Fold back to the middle leg to form a reinforcing part that connects with the middle leg, and
The opening that allows the pivot of the seat member to pass through the part that protrudes toward the seat member
It has a mouth . (D) Fitting the left and right ends of the bearing member to the rotary shaft of the seat member
As a shaft holding part to hold together, one bearing member is adjacent
It is shared by two seat members that fit. 2. The side leg is formed of the same square pipe as the middle leg, and the front or rear surface of the square pipe is positioned so as to correspond to the center of rotation of the seat member. The coupling chair according to claim 1, wherein a bearing member is fixed, and the seat member is supported by the bearing member and the bearing member of the middle leg.