JP4034250B2 - Chair with folding table - Google Patents

Description

  The present invention relates to a chair mainly used in an auditorium or a hall provided with a foldable table behind a backrest for use by a backseat.

  Chairs that are stored behind the backrest with the same inclination as the backrest and have a foldable table that deploys horizontally to the front side when in use are known, such as Shinkansen and aircraft chairs. It is not suitable for writing because of its small size and poor stability.

  Conventionally, as a chair with a table having a large area and a stable table, there is one in which the front end side of the table is lowered and stored when the table is not used (for example, Patent Document 1 and Patent Document 2). ).

  As shown in FIG. 6, the chair of Patent Document 1 is provided with a guide groove 22 that is long in the vertical direction on the back surface of the rectangular tube-shaped leg 21, and when stored, the front end of the table 20 is lowered to the lower end of the guide groove 22. Then, the surface of the table 20 is brought into contact with the surface of the guide groove 22 and fixed with a stopper 23. When the table 20 is used, the stopper 23 is removed, the table 20 is pulled up until the front end is positioned at the upper end of the guide groove 22, and the rear end of the table 20 is extended to the armrest of the chair in the rear seat. 24 is mounted and held.

The chair of Patent Document 2 is omitted in the figure, but is provided with a table frame for storing the table slightly away from the back of the chair, and the table is slidably provided on a slide rail provided in the table frame. In order to improve the operability of storing and unfolding the table, a rotary oil damper, a balance spring, and a table spring are attached.
Japanese Utility Model Publication No. 59-34368. JP 2001-245750 A.

  The chair with a folding table of Patent Document 1 can be made inexpensive with a simple structure, but when pulling out the table and tilting it to the front or when storing the table, if it is inadvertently released, it falls free and a loud falling sound is generated. In addition, the front seat is vibrated. Also, when retracting, the table must be pivoted upward until it is positioned in the extension direction of the guide groove, temporarily stopped, engaged with the guide groove, lowered, and fixed with a stopper, so that emergency evacuation is required. There is also a drawback that leaving is delayed at times.

  On the other hand, the chair with a folding table of Patent Document 2 can smoothly put the table into a use state and a storage state without causing a falling sound of the table or vibration to the front seat, but the structure is complicated and the space is large. And expensive.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an inexpensive chair with a folding table that has a simple structure, does not take up space, and can be easily folded and unfolded.

The chair with a folding table of the present invention employs the following means in order to achieve the above object. That is, in a chair with a folding table provided so that a table used by a person in the back seat can be folded and stored on the back of the back of the chair, mounting brackets for supporting the table are fixed to the left and right of the back of the back of the back, and the table fixedly fittings received in the rear surface of the front left and right, connecting respectively the fitting receiving and mounting bracket in the first and second links, the second link, the connection position between the mounting bracket, the first and lower than the connecting position of the mounting bracket of the first link, the connection position between the receiving metal, while the front of the connecting position of the receiving metal of the first link, in the same vertical plane as the first link The first link and the second link are each provided with a concave curved portion in the center portion on the opposite side, and when the table is stored, the end of the first link on the metal fitting side is the second link. Rin It engages the concave portion, during use of the expansion of the table in a horizontal state, as characterized by the end of the receiving metal side of the second link is to be engaged in the concave portion of the first link Yes.

  Because it is configured in this way, when using the table, if the stored table is pulled up to the front side, it will be continuously expanded and become horizontal, and when storing, hold the rear end of the table When lifted, it moves continuously and has the same inclination as the backrest.

  In this case, when the raised table is placed in a horizontal state or when the lifted table is placed in a storage state, the table is lowered, but the second link functions to counter the table drop. Therefore, even if you let go of your hand, it does not fall freely and no loud sound is generated.

Incidentally, in use state table that during storage, it is necessary to fix, may be attached separately engaging means from the back portion or the mounting bracket, parts Ru complex Na increases.

According to the present invention, the table can be fixed when the table is stored and in use without requiring a separate locking means.

  As described above, the chair with a folding table of the present invention connects the mounting bracket and the receiving bracket with the first link and the second link, respectively, so that it is difficult to break down with a simple configuration, and the space is small and inexpensive. be able to.

  In addition, since the table moves to a use state and a storage state along a continuous trajectory, the handling is simple. Furthermore, when operating to the use state and the storage state, if the table is lifted to the almost middle position by the rear end, it is automatically expanded or stored with the table's own weight while suppressing free fall. So you can quickly leave in an emergency.

Also, when stored in tables engages the concave portion of the receiving metal side of the first link second link, when using the table engages the concave portion of the receiving metal side of the second link first link Therefore, a separate locking means is not required, and it can be made simpler.

An embodiment of a chair with a folding table of the present invention will be described with reference to the drawings.
FIG. 2 is a perspective view showing the overall appearance of the chair with a folding table, FIG. 1 is a side view showing the details of the main part, and FIG. 3 is an exploded perspective view of the mounting part of the table.

  In the chair with a table, a foldable seat 11 and a chair back / back plate 10 inclined slightly rearward are supported by a leg 13 with an armrest 12 fixed integrally, and the table 1 is folded on the back of the chair back / back plate 10. It is attached as possible.

  This chair is connected so that three people can sit down in the horizontal direction. In FIG. 2, the left side and the center part show the state in which the table 1 is in use, and the right side shows the state in which the table 1 is stored.

  As shown in FIG. 1, the table 1 has receiving brackets 2 fixed on both sides of the front end of the back surface, and the first link 3 and the second link 2 are attached to the mounting brackets 5 fixed on both lower sides of the chair back / back plate 10. They are connected by a link 4.

  One end of the first link 3 is connected to the mounting bracket 5 by a pin 3a, and the other end is connected to the receiving bracket 2 by a pin 3b. One end of the second link 4 is connected to the mounting bracket 5 by a pin 4a, and the other end is a receiving bracket. 2 is connected by a pin 4b. The positional relationship between the first link 3 and the second link 4 is such that the vertical direction is located on the same plane, the pin 4a is located below the pin 3a, and the pin 4b is located on the front end side of the table 1 from the pin 4a. Is arranged.

  In addition, concave curved portions 3c and 4c are formed in the center portions of the first link 3 and the second link 4 on the opposite sides, and the opposite sides are convex curved surfaces. Reference numeral 6 denotes a cover that covers the mounting bracket 5.

Next, an operation of the chair with a folding table configured as described above will be described.
When the chair with the folding table is not seated, the seat 11 is folded to the backrest side, and the table 1 is also folded (right end state in FIG. 2). In this state, there is a sufficient space between the front seat and the rear seat so that a person can pass.

  In the state in which the table 1 is folded, the other end side of the first link 3 is engaged with and held by the concave curved portion 4 c of the second link 4. The table 1 is substantially parallel to the inclination of the chair back plate 10 at this position, and the table 1 does not fall to the chair back plate 10 side due to the engagement of the weight of the table 1 with the first link 3 and the second link 4. .

  When the seated person uses the table 1, the table 1 is rotated from the folded state shown by the solid line in FIG. As a result, the first link 3 and the second link 4 are rotated about the pin 3a and the pin 4a, respectively, and the rear end of the table 1 is developed in a horizontal state with a locus S drawn.

  That is, when the table 1 is pulled up, the other end side of the first link 3 is separated from the concave curved portion 4c of the second link 4, and when the rear end of the table 1 moves to the intermediate position S2, as shown in FIG. The link 3 and the second link 4 are positioned so as to face each other vertically. From this state, the first link 3 does not rotate, and the other end side of the second link 4 rotates upward. In the use state, the other end side of the second link 4 does not move as shown in FIG. The one link 3 is held in engagement with the concave curved portion 3c.

In addition, since the locus | trajectory S is continuing from position S1 of a folding state to position S3 of a use state, it moves smoothly, without stopping on the way.
The table 1 is lifted from the folded position S1 to the intermediate position S2, and since the table 1 is lowered by its own weight from the intermediate position S2 to the used position S3, the table 1 may be supported. At this time, even if the hand is released from the table 1, the second link 4 rotates so as to oppose the upper side.

  When the table 1 is folded from the use state, an operation reverse to the above may be performed. That is, holding the rear end of the table 1 from the state shown in FIG. 5 and lifting it upward to exceed the intermediate position S2, the table 1 is lowered by its own weight from the state shown in FIG. That's fine. Also at this time, the first link 3 rotates so as to oppose the lowering of the table 1, so that even if the hand is released from the table 1, the first link 3 is restrained and moved.

  Since it acts in this way, in the case of emergency evacuation or the like, the table 1 can be lifted if it is flipped up until it exceeds the intermediate position S2, and the table is smoothly folded thereafter, so that it does not interfere with the next person's leaving.

It is a side view which shows the structure of the chair with a folding table to which embodiment of this invention is applied. It is a perspective view which shows the whole chair with the folding table. It is a disassembled perspective view of attachment of the table. It is a side view when operating to the intermediate position when making the table into a use state or a storage state. It is a side view when the table is located in use condition. It is a perspective view which shows an example of the conventional desk for classrooms.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Table 2 ... Receptacle 3 ... 1st link 3a, 3b ... Pin 3c ... Recessed curved part 4 ... 2nd link 4a, 4b ... Pin 4c ... Recessed curved part 5 ... Mounting bracket 6 ... Cover 10 ... Chair back back board 11 ... Seat 12 ... Armrest 13 ... Leg 20 ... Table 21 ... Leg 22 ... Guide Groove 23 ... Fastener 24 ... Armrest

Claims (1)

In a chair with a folding table provided so that a table used by a person in the back seat can be folded and stored on the back of the back of the chair, mounting brackets for supporting the table are fixed to the left and right of the back of the back of the back, and the front of the table The brackets are fixed to the left and right rear surfaces, and the mounting bracket and the bracket are connected by the first link and the second link, respectively.
Second links, a connecting position of the mounting bracket, and below the connection position between the mounting bracket of the first link, the connection position between the receiving metal, and said receiving metal of said first link It is located in front of the connection position and is located on the same vertical plane as the first link,
The first link and the second link are each provided with a concave curved portion in the center portion on the opposite side, and when the table is stored, the end of the first link on the metal fitting side is the concave curved portion of the second link. With a folding table, wherein the end of the second link on the side of the receiving metal fitting engages with the concave bent portion of the first link when used in a state where the table is expanded horizontally. Chair.

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