JP6179931B1 - Chair - Google Patents

Abstract

A protection body against a fallen object is caused to appear using a backrest of a chair, and a space formed below the protection body is as wide as possible. A rear portion of a seating seat 2 is connected to a lower portion of a backrest 3 and is movable in a length direction of a guide groove 5 formed in a frame 4 along a vertical direction. A connecting member 6 that is rotatably engaged is fixed, and the connecting member 6 is positioned between the connecting member 6 and the frame 4 at a lower end portion and an upper end portion of the guide groove 5. In this state, a backrest holding mechanism 7 for restricting the direction of the backrest 3 by restricting the rotation of the connecting member 6 is provided. [Selection] Figure 10

Description

  The present invention relates to a chair, and more particularly to a chair installed in a building.

  In general, a large number of chairs are installed in a building, for example, in a spectator space such as a theater, and a ceiling of the building is disposed above these chairs.

  If the ceiling is broken for some reason, the components of the ceiling may fall toward the chair, causing injury to the person seated in the chair.

  As a method of protecting the human body from such an accident, a protective body appears above the human body in the event of an accident, and this protective body receives falling objects from the ceiling and prevents the falling objects from contacting the human body. It is possible to do.

  On the other hand, since it is extremely difficult to install the above-described protective body without narrowing the space around the chair, it is necessary to form the protective body using an existing chair.

  For example, Patent Literature 1 discloses a technique that can be used to form a protective body using such a chair.

  This technology is a technology in which the backrests of the chairs installed in a plurality of rows are used as a table by turning the backrests of the chairs in the front row to a substantially horizontal state. It seems possible to use it.

Japanese Patent Laid-Open No. 11-75995

  However, in order to apply the above-described technique to a protection body against falling objects from the ceiling, the following points are insufficient.

  That is, in order to protect the human body from falling objects from the ceiling, it is necessary to cover the human body with the protective body, in other words, a space portion of a size that allows the human body to be hidden is formed below the protective body. Need to be done.

  However, in the above-described conventional technology, the seat seat of the chair is positioned in the space formed below the backrest that is rotated horizontally, and the space is narrowed by the seat. It is impossible to secure a space that is large enough for a human body to enter.

Further, it is conceivable that the space portion is enlarged by rotating the seating seat to the storage position. However, even if the seating seat is positioned at the storage position, the seating seat is still in the space portion. .
Further, when it is assumed that the backrest of the front row is used as a table, or because of the number of persons accommodated, the interval between rows cannot be set wide.

  Therefore, it is impossible to form the protective body using the conventional technique described above.

  The present invention has been made in order to eliminate the above-described conventional demands and problems in the prior art, and in the event of an accident that causes falling objects from the ceiling, a protective body for protecting the human body from these falling objects. It is an object to be solved to provide a chair that can make the space appear as large as possible and ensure the space formed below the protector as wide as possible.

  In order to solve the above-described problems, the chair of the present invention is provided with a seating seat, a backrest disposed so as to rise upward at the rear portion of the seating seat, and both sides of the seating seat and the backrest. The seat includes a seat and a pair of frames for supporting the backrest, and a rear portion of the seating seat is coupled to a lower portion of the backrest, and is along a vertical direction formed in the frame. A connecting member, which is movable in the length direction of the guide groove and is rotatably engaged in the moving surface, is fixed to the guide groove, and the connecting member is interposed between the connecting member and the frame. In a state where the guide groove is positioned at the lower end and the upper end of the guide groove, a backrest posture holding mechanism that restricts the direction of the backrest by restricting the rotation of the connecting member is provided. It is characterized by being.

  With such a configuration, in a normal state, the connecting member is positioned at the lower end portion of the guide groove, and the connecting member is fixed to the frame via a backrest posture holding mechanism.

  In this state, the chair is in a state in which the backrest is held substantially vertically and the seating seat is held in a substantially horizontal state so as to be seated.

  In the event of an accident in which a fallen object occurs, after releasing the restraint between the connecting member positioned below and the frame by the backrest posture holding mechanism, the connecting member is moved to the guide groove. Move to the top of

  When such a connecting member is moved, the connecting member is pivotable within the moving surface, whereby the backrest to which the connecting member is fixed is tilted toward the front of the chair. be able to.

  Then, in a state where the connecting member is moved to the upper end of the guide groove, the backrest is held horizontally toward the front of the frame, and the connecting member is rotated with respect to the frame by the backrest holding mechanism. Restrain the movement.

  Along with the operation of the connecting member, the seating seat connected to the connecting member also has its rear end raised to the upper end of the guide groove, and the backrest is rotated forward of the frame. Along with this, the front end portion of the seating seat is rotated rearward.

In this state, the seat is positioned so as to hang down from the rear end of the backrest in the horizontal state.
That is, the seating seat is positioned at the position of the backrest in the vertical state.

As a result, a space portion whose upper portion is covered with the backrest is formed in front of the frame.
When a person enters the space, when the fallen object falls, the fallen object is blocked by the backrest, and a collision with a person in the space is prevented.
Therefore, the backrest functions as a protection body against falling objects.

  On the other hand, since the seating seat is rotated toward the frame and is moved away from the space portion, the space portion is prevented from being narrowed, and thus the space portion is secured widely. can do.

  Further, since the upper portion of the chair is a space, there is almost no restriction on the height of the chair, so that the height of the frame and the position of the upper end portion of the guide groove can be easily set high.

Accordingly, the backrest can be held horizontally at a higher position.
That is, the formation position of the protective body can be set high, and also from this point, the space part into which a person enters is widened to facilitate the evacuation of a person when an accident due to a falling object occurs.

  The backrest posture holding mechanism includes an engagement hook projecting from the connection member, and a lock that is provided on the frame so as to be positioned in a movement area of the engagement hook and that the engagement hook is engaged and disengaged. And a protrusion.

  By adopting such a configuration, it is possible to ensure the engagement between the connecting member and the frame, to suppress unnecessary movement of the backrest during normal use, and to ensure good usability. .

  Further, it is possible to improve impact resistance when receiving a fallen object using the backrest as a protective body.

  In this case, it is desirable that the engagement hook be configured to be able to advance and retract with respect to the connecting member.

  By setting it as such a structure, the engagement depth of the said engagement hook and the said latching protrusion can be set largely, and, thereby, the engagement force of both can be raised more.

  When the engaging hook is engaged with and disengaged from the locking projection by providing a biasing member for biasing the engaging hook in the forward / backward direction between the engaging hook and the connecting member. In addition, the engagement hook can be held in a state in which the engagement hook is always in contact with the locking projection, and the engagement / disengagement can be stabilized.

  Further, in a state where the engagement hook is engaged with the locking projection, a stable engagement state can be ensured.

  Further, the seating sheet is rotatably connected to the connecting member, and the connecting member and the seating sheet are connected to each other in a state where the connecting member is positioned below the guide groove below the frame. It can be set as the structure which provided the seating sheet stopper with which the lower part of the said seating sheet is contact | abutted in the front side rather than a connection part.

  By adopting such a configuration, the seating seat can be selectively positioned at the use position and the storage position in a normal state, and a use form similar to that of an existing chair can be ensured.

  According to the chair of the present invention, it is possible to make a protection body against a fallen object appear using the backrest of the chair, and it is possible to secure a space formed below the protection body as much as possible.

It is a front view which shows the 1st Embodiment of this invention. 1 shows a first embodiment of the present invention and is a left side view of FIG. 1. FIG. 3 shows the first embodiment of the present invention and is a diagram in which a lower part of the frame is partially broken in FIG. 2. The 1st Embodiment of this invention is shown and it is an enlarged side view of a connection member. FIG. 5 shows the first embodiment of the present invention, and is a view showing a state in which a part of the connecting member is removed in FIG. 4. FIG. 4 is a view similar to FIG. 3 for illustrating the operation of the first embodiment of the present invention. FIG. 4 is a view similar to FIG. 3 for illustrating the operation of the first embodiment of the present invention. FIG. 4 is a view similar to FIG. 3 for illustrating the operation of the first embodiment of the present invention. FIG. 4 is a view similar to FIG. 3 for illustrating the operation of the first embodiment of the present invention. FIG. 4 is a view similar to FIG. 3 for illustrating the operation of the first embodiment of the present invention. It is a figure similar to FIG. 3 which shows the 2nd Embodiment of this invention.

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
In these figures, the code | symbol 1 shows the chair of this embodiment.

  The chair 1 according to the present embodiment is used by being fixed to a floor surface of a building such as a theater, for example, and is arranged so as to rise upward at a seating seat 2 and a rear portion of the seating seat 2. A backrest 3 and a pair of frames 4 disposed on both sides of the seating seat 2 and the backrest 3 and supporting the seating seat 2 and the backrest 3. The seating seat 2 is provided below the backrest 3. The rear part is connected, and the guide groove 5 (see FIG. 2) formed in the frame 4 along the vertical direction is movable in the length direction and is rotatable in the moving surface. The connecting member 6 to be joined is fixed, and the connecting member 6 is positioned between the connecting member 6 and the frame 4 at the lower end portion and the upper end portion of the guide groove 5. 6 turns Backrest position holding mechanism 7 for regulating the orientation of the backrest 3 by bundle has a configuration provided.

  More specifically, the seating sheet 2 is provided with engaging pins 8 projecting outward in the width direction of the seating sheet 2 on both sides of the rear end thereof. The seating seat 2 is pivotably connected to the connecting member 6 by being fitted to the pivotable member 6.

  The backrest 3 is provided with a pair of engaging pins 9 projecting outward in the width direction of the backrest 3 on both sides of the lower end of the backrest 3 at intervals in the vertical direction of the backrest 3. The coupling member 6 is fixed to the backrest 3 by fitting the coupling pin 9 to the coupling member 6.

  The connecting member 6 is formed in a substantially L shape and is disposed between both side surfaces of the backrest 3 and the frame 4, and the engagement pin 9 of the backrest 3 on one side of each connecting member 6. Is fitted, and the engaging pin 9 of the seating seat 2 is rotatably fitted to the other side.

  The frame 4 is disposed on both sides of the seating seat 2 and the backrest 3 in the width direction, and is fixed to a floor surface of the building (both not shown) with bolts or the like.

  The frames 4 are connected at the upper part by an upper connecting rod 10 positioned behind the backrest 3 and at the lower part by a lower connecting rod 11 positioned below the seating seat 2. Integrated.

  The guide groove 5 is formed in each frame 4, and as shown in FIG. 2, a vertical portion 5a along the vertical direction and a horizontal portion 5b from the lower end portion of the vertical portion 5a toward the front of the chair 1. It has.

  On the other hand, on the surface of the connecting member 6 facing the frame 4, an outward sliding projection 12 is integrally formed on the front side of the position where the engaging pin 8 of the seating seat 2 is fitted. The sliding projection 12 is engaged with the guide groove 5 so as to be slidable and rotatable around the axis.

  Further, a fixing piece 13 for integrally fixing the upper part of the backrest 3 to the frame 4 by being engaged with the upper connecting rod 10 from above is integrally provided on the upper back of the backrest 3.

  On the other hand, in the lower part of the frame 4, the connecting member 6 is positioned at the lower part of the guide groove 5, and the front part of the engaging pin 8 provided on the seating seat 2 is the front part. A seating seat stopper 14 with which the lower part of the seating seat 2 is brought into contact is provided by connecting both the frames 4.

  Further, on the lower surface of the seating seat 2, a protrusion 15 is provided integrally with the seating seat stopper 14 so as to be brought into contact with the seating seat stopper 14 from the front surface side and restraining the rearward movement of the seating seat 2.

  In this embodiment, the backrest posture holding mechanism 7 includes the upper connecting rod 10 and the lower connecting rod 11, and an engaging hook that protrudes from the connecting member 6 and is selectively engaged with each rod. 16, and the upper connecting rod 10 and the lower connecting rod 11 serve as locking protrusions that restrain the rotation of the connecting member 6.

  As shown in FIG. 5, the engagement hook 16 is disposed along an imaginary line connecting the pair of engagement pins 9, and a base end portion of the engagement hook 16 can slide the connection member 6. And a hook portion is formed at a tip portion that is housed in a recess 6 a formed in the lower portion of the connecting member 6 and protrudes to the outside of the connecting member 6.

  In the present embodiment, an outer flange 16a is integrally formed at the base end portion of the engagement hook 16 housed in the recess 6a. The upper and lower surfaces of the outer flange 16a and the inner wall of the recess 6a A compression spring 17 is interposed between the two.

  Accordingly, the engagement hook 16 is elastically held at a predetermined position in the recess 6 a by the pair of compression springs 17.

  The recess 6a is closed by a cover 18 as shown in FIG. 4 after the proximal end of the engagement hook 16 and the compression spring 17 are assembled.

  As shown in FIG. 4, the cover 18 is fixed to the connecting member 6 by a pair of bolts 19.

  The chair 1 of the present embodiment configured as described above normally holds the lower part of the backrest 3 after the fixing piece 13 provided on the back surface of the backrest 3 is hooked on the upper connecting rod 10. By moving the chair 1 toward the front, the engaging hook 16 provided on the connecting member 6 is pressed against the lower connecting rod 11 from behind.

  When the engaging hook 16 pressed against the lower connecting rod 11 moves in such a manner as to be pulled out from the connecting rod 11 while compressing one of the compression springs 17 and passes through the lower connecting rod 11. Thus, the compressed spring 17 is returned to the initial position by the urging force of the compressed compression spring 17 to be engaged with the lower connecting rod 11.

  Thereby, the backrest 3 is fixed to the frame 4 at the top and bottom.

  Further, by rotating the seating sheet 2 around the engagement pin 8, the front end side thereof is moved downward, and the seating sheet 2 is placed on the seating sheet stopper 14.

  As a result, the seat 2 is fixed substantially horizontally by the frame 4.

  By the above operation, the backrest 3 and the seating seat 2 are fixed to a prescribed position of the frame 4 and set to a use state.

  Then, in the event of an accident where something falls, first, as shown by the arrow in FIG. 6, the seating seat 2 is rotated so that its tip moves upward, and FIG. Along the backrest 3 as indicated by the chain line.

Next, as shown by an arrow (A) in FIG. 7, the lower part of the backrest 3 is rotated toward the rear of the chair 1 together with the seating seat 2.
By this operation, the engaging hook 16 is pulled out from the connecting member 6 against one urging force of the compression spring 17 and is disconnected from the lower connecting rod 11.

  Further, after the engaging hook 16 is separated from the lower connecting rod 11, the backrest 3 and the seat 2 are moved upward of the frame 4 as shown by an arrow (b) in FIG.

Such upward movement is performed along the guide groove 5 by the sliding protrusion 12 protruding from the connecting member 6.
Further, in such an initial stage of upward movement, as shown in FIG. 8, the fixing piece 13 provided on the backrest 3 is detached from the upper connecting rod 10, and the backrest 3 and the frame are removed. The fixed state with 4 is released.

  Next, after the backrest 3 and the seat 2 are rotated toward the front of the chair 1 to bring them into a substantially horizontal state, this horizontal state is maintained, as shown by arrows (c) in FIG. Then, it is translated upward.

  In the process of upward movement of the backrest 3 and the seat 2, the engagement hook 16 provided on the connecting member 6 is provided on the frame 4 as shown in FIG. It is made to contact | abut to the lower part of the said upper connecting rod 10. FIG.

  Further, when the backrest 3 and the seat 2 are moved upward, the engagement hook 16 compresses one compression spring 17 built in the connection member 6 and enters the connection member 6. By being pushed in, the engagement hook 16 moves beyond the upper connecting rod 10.

  Then, the engagement hook 16 that has moved above the upper connecting rod 10 is returned to its original position by the compressed compression spring 17.

  Next, the backrest 3 and the seat 2 are pushed down slightly to engage the engaging hook 16 with the upper connecting rod 10 as shown in FIG. The upper part of the frame 4 can be fixed so as to cover the front upper part of the chair 1.

  As a result, a space part whose upper part is covered with the backrest 3 and the seating seat 2 is formed in front of the frame 4 and serves as a refuge space at the time of an accident.

  Here, the backrest 3 and the seat 2 are held upward, and only the frame 4 is left in the horizontal direction of the space portion, so that a space portion of the maximum size can be secured.

  In addition, the various shapes, structures, and the like of the respective constituent members shown in the above embodiment are merely examples, and various changes can be made based on design requirements and the like.

  For example, in the above-described embodiment, the configuration has been described in which the seat 2 is moved upward in a state where the seat 2 is overlapped with the backrest 3 so as to cover the upper portion of the space formed in front of the frame 4. Instead of this, as shown in FIG. 11, in a state where the positional relationship between the backrest 3 and the seat 2 is maintained in the positional relationship during normal use of the chair 1, as shown in FIG. Only the backrest 3 may be fixed to the upper portion of the frame 4 so as to cover the upper front portion of the frame 4.

In this case, the seat 2 is retracted between the frames 4 and is retracted from a space formed in front of the frame 4.
Therefore, the space portion is not narrowed, and a sufficiently wide space portion can be secured.

DESCRIPTION OF SYMBOLS 1 Chair 2 Seating seat 3 Backrest 4 Frame 5 Guide groove 5a Vertical part 5b Horizontal part 6 Connection member 6a Recess 7 Backrest posture maintenance mechanism 8 Engagement pin 9 Engagement pin 10 Upper connection rod (locking protrusion)
11 Lower connecting rod (locking protrusion)
12 Sliding projection 13 Fixed piece 14 Seating sheet stopper 15 Projection 16 Engagement hook 16a Outer flange 17 Compression spring 18 Cover 19 Bolt

Claims (6)

  A seating seat, a backrest disposed so as to rise upward at a rear portion of the seating seat, a pair of frames disposed on both sides of the seating seat and the backrest, and supporting the seating seat and the backrest; The rear portion of the seat is connected to the lower portion of the backrest, and is movable in the length direction of the guide groove formed in the vertical direction of the frame, and A connecting member that is pivotably engaged in the moving surface is fixed, and the connecting member is positioned at the lower end and the upper end of the guide groove between the connecting member and the frame. And a backrest holding mechanism for restricting the direction of the backrest by restricting the rotation of the connecting member.   The backrest posture holding mechanism is configured to hold the backrest in a substantially horizontal position in a state where the connecting member is positioned at an upper end portion of the guide groove. Chair.   The backrest posture holding mechanism is configured to hold the backrest in a substantially vertical position in a state where the connecting member is positioned at a lower end portion of the guide groove. Chair.   The backrest posture holding mechanism is provided with an engagement hook projecting from the connecting member, and a lock provided on the frame so as to be located in a movement area of the engagement hook, and the engagement hook is engaged and disengaged. The chair according to any one of claims 1 to 3, wherein the chair is configured by a protrusion, and the engaging hook is attached to the connecting member so as to be movable forward and backward.   The chair according to claim 4, wherein a biasing member that biases the engagement hook in a forward / backward direction is provided between the engagement hook and the connecting member. The seating seat is pivotally connected to the connecting member, and in a state where the connecting member is positioned at the lower part of the guide groove at the lower part of the frame, the connecting member and the seating sheet The chair according to any one of claims 1 to 5, further comprising a seating seat stopper with which a lower portion of the seating seat is brought into contact with the front side of the connecting portion.