JP3060198B2 - Chair with auxiliary table - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair with an auxiliary table in which a stored auxiliary table can be pulled out to the front of a occupant and used.

[0002]

2. Description of the Related Art There is a chair having a structure shown in FIG. 6 as a chair in which a stored auxiliary table can be pulled out to the front of a seated person as required. Backrest (11)
And the seating plate (12) are supported by a pair of left and right legs (13) and (13), and on both sides of the backrest (11), an elbow rest (14) (14) protrudes forward.

A swing arm (15) is provided on the outer side of one of the armrests (14) so as to be vertically swingable with a support shaft (17). The outer surface is provided with a table plate (2) rotatably attached by a hinge (18). In this case, as shown by the imaginary line in FIG. 6, the seat plate (1) is placed with the table plate (2) along the side of the chair body (A).
2) Store this so that it will be located near.

When the table (2) is set in the use state, the swing arm (15) is swung forward to a horizontal position around the support shaft (17), and then the swing arm (15) is swung around the hinge (18). Rotate the table board (2) to make it horizontal. Then, as shown by the solid line in the figure, the table plate (2) is placed between the distal ends of the armrests (14), (14), and the table plate (2) can be set to the use state.

However, in the above-described conventional apparatus, when the table plate (2) is taken in and out, the operation of swinging the swing arm (15) and the table plate with respect to the swing arm (15) are performed.
There is a problem that two operations of rotating the (2) are required, and the required number of operations becomes plural, so that the table plate (2) cannot be smoothly and quickly put in and out.
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been made in such a manner that "the table plate (2) is placed along the side of the chair body and the seat plate (12).
The storage state of the table board (2)
Chair with auxiliary table that can be pulled out and put in and out of the use state horizontally supported in the space in front of the occupant "
The object of the present invention is to allow the table plate (2) to be moved in and out simply by rotating the table plate (2) in one direction, so that the table plate (2) can be moved in and out smoothly and quickly. .

[0006]

[Technical Means] The technical means of the present invention for solving the above-mentioned problem is that a bearing (4) fixed to the chair body and located on a side portion thereof and penetrating the bearing (4) back and forth. An advancing / retreating shaft (3) having a pair of screws, a table plate (2) rotatably supported at the tip of the advancing / retreating shaft (3), and a table plate;
A cam plate (22) mounted so as to rotate integrally with the table plate (2) at the shaft support portion of (2), and a cam contacting the cam portion (220) of the cam plate (22) from behind. A receiving plate is provided, and when the table plate (2) is rotated by the pivot support by an angle necessary to move the table plate (2) from the storage position to the use position, the cam portion (220) and the cam receiving plate move forward and backward by a relative rotation operation. The axis (3) advances a certain distance, and the reciprocating axis (3)
Is set to be approximately 90 degrees. "

[0007]

The above technical means operates as follows. Seating board
When the table plate (2) housed in the vicinity of the side of (12) is rotated forward, a cam plate attached so as to rotate integrally with the table plate (2) at the pivotal support portion of the table plate (2). (22) rotates, and the cam portion (220) of the cam plate (22) and the cam receiving plate relatively rotate. Then, the reciprocating shaft to which the cam plate (22) is attached
(3) is acted upon by a force to move it forward,
(3) moves forward by a certain distance with respect to the bearing body (4) fitted on the outside. Then, the advancing / retreating shaft (3) penetrates the bearing body (4) in a screw pair state, so that the advancing operation is converted into a rotating operation and the advancing / retreating shaft is also rotated.
The rotation angle set in accordance with the advance distance of (3) is approximately 9
The reciprocating shaft (3) rotates by 0 degrees. That is, the table board (2) stored in a hanging state on the side of the chair body is set in a horizontal posture (in use) in front of the seated person.

In order to store the table board (2) set in the used state, the operation described above may be performed in reverse, whereby the table board (2) moves along the reverse path. While being seated, it is stored in the space near the side of the seating plate (12).

[0009]

The present invention has the following specific effects. Table board
The table plate (2) can be moved in and out simply by rotating the table plate (2) in one direction at its pivot, so that the table plate (2) is swung forward and the table plate (2) is moved from an upright state to a horizontal state. The table plate (2) can be taken in and out quickly and smoothly as compared with the above-mentioned conventional one which requires two operations of rotating.

[0010]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a pair of rectangular frame-shaped pipe legs (51) and (51) are provided on the left and right sides of the chair body (A). Behind (510) (51
0), the lower portion of the backrest (11) is inserted between the backrests (11), and the backrest (11) is screwed (50) (50) with the pipe legs (51).
It is fixed to (51). Further, a seating plate (12) is provided below the backrest (11), and the seating plate (12) is
The pipe legs (51) are fixed between the front and rear sides (511) and (510) with screws (52) and (52).

An elbow rest (14) is mounted and fixed on the upper side (513) of the pipe leg (51), and a hanging plate (140) is connected to the lower surface of the elbow rest (14) as shown in FIG. Have been. The hanging plate (140) is provided with a route realizing mechanism (B) for moving the table board (2) along a predetermined route, and the route realizing mechanism (B)
Is a cylindrical advance / retreat shaft (3) with a multi-thread screw (31) engraved on the outer circumference
And a bearing body (4) screwed in the vicinity of the tip thereof, and a cam plate (22) attached to an advancing / retracting shaft (3) projecting forward from the bearing body (4). The path realizing mechanism (B) is housed in the cover (8) except for the vicinity of the tip.

The bearing body (4) is mounted on a flat L-shaped mounting board (60) fixed to the hanging plate (140) connected to the armrest (14) with screws (61) (61). Installed. That is, at the tip of the mounting board (60), it is bent sideways to mount the mounting arm.
(62) is formed, and a bearing (4) is inserted into a through hole (63) drilled in the mounting arm (62), and furthermore, projects from one end of the bearing (4). Flange (41) with bolt (43)
And the nut (44) is fixed to the mounting arm (62).

The shaft (3) screwed into the bearing (4) is formed with a shaft hole (33) drilled from its rear end (see FIG. 4). Is externally slidably inserted into the support rod (54). A male screw (540) is engraved at the rear of the support rod (54), and the male screw (540) is attached to the hanging plate (1).
It is screwed and fixed to the fixing block (7) fixed to 40). Further, a spring hook pin (71) to be described later is screwed into an outer wall surface of the fixed block (7), and the spring hook pin (71)
The other end of the spring (55) that engages with the other spring hook pin (35) that is screwed and fixed to the contact (34) that is externally fitted and fixed to the reciprocating shaft (3)
Are engaged.

A cam plate (2) is provided near the tip of the advance / retreat shaft (3).
2) is swingably fixed by a support shaft (21), and the cam portion (220) of the cam plate (22) is in contact with the front surface of the flange (41) of the bearing body (4). When the cam plate (22) is rotated, the flange (41) is pushed by the cam portion (220), and the reciprocating shaft (3) is made to advance forward. Therefore, in this embodiment, the flange (41) corresponds to the cam receiving plate described in the technical means. In addition, table board
While (2) moves from the initial storage position to the final use position, the pitch of the multi-thread screw (31) and the cam plate (3) are set so that the reciprocating shaft (3) rotates by 90 degrees. 22) Cam section
The shape of (220) is set.

A corner portion (27) of the table plate (2) is fixed near the swing end of the cam plate (22). That is, as shown in FIG. 5, the table mounting portion (225) extends from one end of the cam plate (22), and the through holes (226) (226) formed in the table mounting portion (225). Then, a fixing screw (not shown) is screwed into the table plate (2) to fix it. In this embodiment, a table plate is provided via the cam plate (22).
(2) is mounted on the reciprocating shaft (3), but the table plate (2) is directly supported on the reciprocating shaft (3), and an independent cam plate is mounted on the supporting portion. You may make it able to rotate integrally with (2).

Next, the actual use of the chair with an auxiliary table of the above embodiment will be described. As shown by the imaginary line in FIG. 1, the table plate (2) in the stored state is oriented vertically below the elbow rest (14), and its upper side (28) is a retractable shaft. It is in a state of being stored neatly in parallel with (3). When the table plate (2) is rotated forward from the storage state shown by the imaginary line in FIG.
(22) swings about the support shaft (21), and the cam portion (220) presses the flange (41) of the bearing body (4). Then, by the pressing force, the cam plate (22) is moved forward and backward along with the shaft.
(3) begins to move forward. On the other hand, since the reciprocating shaft (3) is screwed into the bearing body (4) by a multi-threaded screw (31) formed on the shaft (3), the reciprocating shaft (3) is moved forward. , The reciprocating shaft (3) moves forward while rotating with respect to the bearing body (4). Accordingly, the table plate (2) moves in the direction of rotation of the reciprocating shaft (3) while rotating forward around the support shaft (21), and the table plate (2) combines the above two directions. Move in the direction you chose.
That is, the table board (2) is lifted obliquely forward and upward from the space below the elbow rest (14) while moving in a direction away from the chair body (A). And the table board
When the rotation of the (2) from the stowed position to the used position is completed, the reciprocating shaft (3) is rotated by 90, and the table board (2) is moved in front of the seated person. Is set to When the table plate (2) is set in front of the seated person, the table plate (2) is located at the distal end of the elbow rest (14) as shown in FIG.
41) Being placed on the top ensures its stabilization.

Next, when storing the table board (2) set in the above-mentioned use state, the table board (2) may be pushed forward. Then, the table board (2) moves along the reverse path and is stored in the space below the elbow rest (14). In this retracted state, the reciprocating shaft (3) is pulled backward by the urging force of the spring (55).
Due to the weight of (2), the table board (2) does not naturally descend to the position indicated by the solid line in FIG. 1, and the table plate (2) is stabilized at the storage position indicated by the imaginary line in FIG.

In the above-described embodiment, a screw shaft having a multi-threaded thread formed on the outer periphery is used as the reciprocating shaft (3). However, a cylinder having a cam groove formed on the outer peripheral surface is used as the reciprocating shaft (3). You can also. Further, in the above embodiment, the cam plate (22) is
The cam plate (22) provided for mounting the bearing body (4) is mounted on the mounting arm (62) of the mounting board (60) or other fixed wall. ) May be brought into contact, and in such a case, these mounting arms (62) and the like function as the cam receiving plate described in the section of the technical means described above.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a plan view of an embodiment of the present invention.

FIG. 3 is a cross-sectional view of the vicinity of a joint between a reciprocating shaft (3) and a cam plate (22).

FIG. 4 is a sectional view of an essential part showing a state in which an arrangement portion of an advancing / retreating shaft (3) is cut in the axial direction thereof

FIG. 5 is a perspective view of a cam plate (22).

FIG. 6 is an explanatory view of a conventional example.

[Explanation of symbols]

 (2) ・ ・ ・ Table plate (3) ・ ・ ・ Advancing / retracting shaft (55) ・ ・ ・ Spring (22) ・ ・ ・ Cam plate (220) ・ ・ ・ Cam part

Claims (2)

(57) [Claims] 1. A stored state in which a table board (2) is hung down along the side of a chair body and near the side of a seating board (12), and the table board (2) is pulled out and a seated person In a chair with an auxiliary table which can be taken in and out of a use state horizontally supported in the front space of the chair, a bearing body (4) fixed to the chair body and located on a side thereof, and the bearing body (4) An advancing / retracting shaft (3) penetrating back and forth and having a pair of screws, and a table plate rotatably supported by the tip of the advancing / retreating shaft (3)
(2) and a cam plate (22) attached to the table plate (2) so as to rotate integrally with the table plate (2) at a pivot portion of the table plate (2).
And a cam receiving plate which comes into contact with the cam portion (220) of the cam plate (22) from the rear side, and is rotated by the pivot at an angle necessary to move the table plate (2) from the storage position to the use position. At this time, the reciprocating shaft (3) advances a certain distance due to the relative rotation of the cam portion (220) and the cam receiving plate, and the turning angle of the reciprocating shaft (3) accompanying the advance of the certain distance is substantially reduced. Chair with auxiliary table set to be 90 degrees. 2. The chair with an auxiliary table according to claim 1, wherein the reciprocating shaft (3) is biased rearward by a spring (55).