JP2019198412A - Folding chair - Google Patents

Abstract

To easily change a backrest to a prescribed tilt position in a state sitting on a seat base.SOLUTION: The folding chair includes: a seat base frame 1; a back frame 2 that can stop at a plurality of tilt positions through a ratchet mechanism 3 on the seat base frame 1 and that is connected in a freely foldable manner; a seat material 9 that is connected in both side parts to the seat base frame 1 and the back frame 2; an arm rest 6 that connects in a freely tiltable manner in the rear end to the vertical middle of the back frame 2; a support frame 7 that connects in a freely tiltable manner in the upper end to the front part of the arm rest 6, with the lower end connected in a freely tiltable manner to the seat base frame 1 and that supports the arm rest 6 in a posture parallel to the seat base frame 1; a front leg frame 4 that connects in a freely foldable manner to the front part of the seat base frame 1; a rear leg frame 5 that connects in a freely foldable manner to the rear part of the seat base frame 1; and a stopper mechanism that stops the front leg frame 4 and the rear leg frame 5 in a flaring manner downward. The arm rest 6 is moved forward and backward, with the tilt position of the back frame 2 thereby changed.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a folding chair that can tilt and stop the backrest at a predetermined angle, and more particularly to a folding chair that can tilt the backrest while sitting.

Various chairs have been developed that can tilt the backrest. (See Patent Documents 1 and 2)
In these chairs, the backrest is tiltably connected to a seat, an armrest is connected to the backrest, and the backrest is stopped at a predetermined tilting position via the armrest. For the backrest, adjust the tilt position by changing the connection position with the rear end of the armrest, or adjust the tilt position by changing the connection position between the lower surface of the armrest and the upper end of the leg fixed in a vertical posture. Yes.

JP 2005-205021 A Utility Model Registration No. 3002524

  A chair that adjusts the tilting position of the backrest by adjusting the connecting position of the armrest and the backrest cannot easily change the tilting position of the backrest while sitting on the seat. In addition, a chair connected to the upper end of the leg with the lower surface of the armrest fixed in a vertical posture cannot be used comfortably in a state close to a horizontal posture with a large tilt angle of the backrest. To tilt the backrest to an angle close to the horizontal posture, it is necessary to make the armrest extremely long, and when the armrest is lengthened and the backrest is inclined to a position close to the horizontal posture, the armrest tilts steeply and the hand rests. It is because it cannot arrange | position to the position which mounts.

  The present invention was developed for the purpose of eliminating the above drawbacks. One of the objects of the present invention is to provide a folding chair that allows a user to easily change the backrest to a predetermined tilting position while sitting on a seat. There is to do.

  A folding chair according to an aspect of the present invention is configured to be able to stop at a plurality of tilting positions via a ratchet mechanism 3 and to be freely foldable to a seat frame 1 and rear end portions on both sides of the seat frame 1. A back frame 2, a seat material 9 having both sides connected to the seat frame 1 and the back frame 2, an armrest 6 having a rear end that is tiltably connected to the middle of the upper and lower sides of the back frame 2, and an armrest 6 A support frame 7 that supports the armrest 6 in a posture parallel to the seat frame 1, and a seat frame 1. The front leg frame 4 that is foldably connected to the front part of the seat frame, the rear leg frame 5 that is foldably connected to the rear part of the seat frame 1, and the front leg frame 4 and the rear leg frame 5 in the side view. The hem spreads toward And a stopper mechanism for stopping, by moving the armrest 6 back and forth, has a structure capable of changing a tilted position of the back frame 2.

Although this invention does not limit a folding chair to the following, it can be set as the following structures.
The folding chair according to an aspect of the present invention is provided with a grip 8 protruding upward at the front portion of the armrest 6, and a user sitting on the chair moves the grip 8 forward, and the back frame through the armrest 6. 2 can be configured to tilt forward. In particular, the grip that protrudes upward at the front of the armrest can be easily moved forward by pushing it, so that the user can raise the back frame in a vertical posture with the user leaning against the backrest. The posture where the user leans against the backrest is an easy posture, but in this posture, the back frame is pushed by the back and it is heavy to raise the back frame to the vertical posture. However, the armrest that can move smoothly and strongly by pushing the grip forward can easily raise a heavy back frame, so this chair has the feature that it can be tilted in an easy posture to raise the back frame easily.

  The folding chair according to an aspect of the present invention is a cushion in the front part of the seat material 9 that is connected to the both sides of the seat frame 1 in a tapered shape in which the seat frame 1 is gradually widened toward the front. It is possible to improve the sitting comfort. This is because a sheet material having a large width is more easily loosened and deformed than a portion having a small width. In particular, the structure that can increase the amount of deformation of the seat material at the front of the pedestal frame is a sheet material that is connected to the pedestal frame on both sides. There is a feature that can be supported comfortably.

  The folding chair according to an aspect of the present invention is provided with an inclined portion 1X inclined in a downward gradient at the front portion of the seat frame 1, and by connecting the front portion of the sheet material 9 to the inclined portion 1X. The front edge of the sheet material 9 connected to the frame 1 is inclined downward toward the front edge, so that the seating comfort can be improved. This is because the legs can be comfortably supported without strongly pushing them up locally.

  The folding chair according to an aspect of the present invention is configured such that the front leg frame 4 and the rear leg frame 5 are formed in a U shape by connecting the connection frames 4B and 5B to both sides of the horizontal frames 4A and 5A. The front end of the front leg frame 4 is connected to the seat frame 1 so that the front leg frame 4 can be tilted, and the distance between the connection frames 4B of the front leg frame 4 is wider than the distance between the connection frames 5B of the rear leg frame 5. The connecting frame 5B of 5 is arranged inside the connecting frame 4B of the front leg frame 4 so that the connecting frames 4B and 5B of the front leg frame 4 and the rear leg frame 5 do not overlap each other and can be folded more thinly and compactly.

  The folding chair of the present invention has a feature that a user can easily change the backrest to a predetermined tilting position by sitting on a seat and moving the armrest back and forth. The folding chair of the present invention has a back frame connected to the rear end portions on both sides of the seat frame so that the folding chair can be stopped at a plurality of tilting positions via a ratchet mechanism, and the rear end of the armrest is connected to the back frame in a vertical plane. The front part of this armrest is connected to the pedestal frame with the support frame, and both ends of the support frame are connected to be able to rotate in the vertical plane. When moved back and forth, the armrest, support frame, seat frame and back frame form a parallelogram, allowing the back frame to tilt while holding the armrest in a posture parallel to the seat frame, and further ratchet This is because the back frame is stopped at a predetermined tilt position by the mechanism. The armrest that moves back and forth in a horizontal posture can tilt the back frame easily because the user can tilt the back frame by sitting on a chair and holding the armrest and moving back and forth.

It is a perspective view of the folding chair which concerns on one Embodiment of this invention. It is a perspective view which shows the state which removed the sheet | seat material of the folding chair shown in FIG. It is a side view of the folding chair shown in FIG. It is a top view of the folding chair shown in FIG. It is a front view of the folding chair shown in FIG. It is a side view which shows the movable state of the backrest of the folding chair shown in FIG. It is a side view which shows the process of folding the folding chair shown in FIG. It is a bottom view which shows the folding chair folded. It is an enlarged view which shows the connection part of a base frame and a front leg frame. It is an enlarged view which shows the connection part of a base frame and a rear leg frame.

Hereinafter, the present invention will be described in detail with reference to the drawings. In the following description, terms indicating specific directions and positions (for example, “up”, “down”, and other terms including those terms) are used as necessary. In order to facilitate understanding of the invention with reference to the drawings, the technical scope of the present invention is not limited by the meaning of these terms. Moreover, the part of the same code | symbol appearing in several drawing shows the same or equivalent part or member.
Furthermore, the embodiment shown below shows the specific example of the technical idea of this invention, Comprising: This invention is not limited to the following. In addition, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described below are not intended to limit the scope of the present invention, but only to exemplify unless otherwise specified. It is intended. The contents described in one embodiment and example are applicable to other embodiments and examples. In addition, the size, positional relationship, and the like of members illustrated in the drawings may be exaggerated for clarity of explanation.

  The folding chair concerning one Embodiment of this invention is shown in FIGS. In these drawings, FIG. 1 is a perspective view of a folding chair, FIG. 2 is a perspective view with the seat material of the folding chair shown in FIG. 1 removed, and FIGS. 3 to 5 are side views, plan views, and FIG. FIG. 6 is a side view showing the movable state of the backrest of the folding chair, FIG. 7 is a process diagram for folding the folding chair, and FIG. 8 is a bottom view of the folded chair. 2 to 4 and 6 to 8, in order to facilitate understanding of the structure of the folding chair, the state in which the sheet material is removed or the state in which the sheet material is displayed with a two-dot chain line. Show.

  A folding chair 100 shown in FIGS. 1 to 5 has a seat 10 and a backrest 12 by connecting both sides of a sheet material 9 to a frame 10 bending a metal pipe. The frame 10 includes a seat frame 1 constituting a seat 11 and a back frame 2 constituting a backrest 12, and a rear end of the seat frame 1 and a lower end of the back frame 2 are connected via a ratchet mechanism 3. It is connected in a tiltable manner. A front leg frame 4 is foldably connected to the front portion of the pedestal frame 1, and a rear leg frame 5 is foldably connected to the rear portion of the pedestal frame 1. Further, the folding chair 100 has an armrest 6 having a rear end coupled to the middle between the upper and lower sides of the back frame 2 and an upper end that is tiltably coupled to the front portion of the armrest 6, and at the front portion of the seat frame 1. A support frame 7 having a lower end that is tiltably connected is provided, and the armrest 6 is moved in the front-rear direction to change the tilt position of the back frame 2.

(Sheet material 9)
The sheet material 9 connects both sides to the seat frame 1 and the back frame 2. The sheet material 9 can be a canvas, a flexible plastic sheet, or a plastic net material. The sheet material 9 is provided with a connecting portion 9a for inserting and connecting the metal pipe of the frame 10 along both side edges. The seat material 9 shown in FIG. 1 includes a seat surface sheet portion 9 </ b> A that forms both sides of the seat frame 11 by connecting to the seat frame 1, and a backrest 12 that connects both sides to the back frame 2. It is divided into back sheet portions 9B that form a surface. However, the sheet | seat material 9 can also be connected with a base frame and a back frame as one sheet | seat shape which a seat surface sheet | seat part and a back surface sheet | seat part continue.

(Ratchet mechanism 3)
A folding chair 100 shown in FIGS. 2 and 3 has a back frame 2 connected to the rear end portions on both sides of a seat frame 1 via a ratchet mechanism 3. As shown in FIG. 6, the ratchet mechanism 3 can stop the back frame 2 at a plurality of tilt positions (indicated by “a” to “d” in FIG. 6), and place the seat frame 1 and the back frame 2 in a horizontal posture (FIG. 6). As shown in FIG. 7, it is connected so that it can be tilted to a position where it can be stacked, that is, it can be folded. In the ratchet mechanism 3, the stopper (not shown) is released when the back frame 2 is raised to a substantially vertical posture (indicated by e in FIG. 6), and the vertical posture (in FIG. Display) to a substantially horizontal posture (indicated by “f” in FIG. 6) without being stopped, and when the vertical posture is raised by a predetermined angle from the horizontal posture, a plurality of tilt positions (a to d in FIG. 6). A bracket with a mechanism that can be stopped) is suitable. The ratchet mechanism 3 can be a mechanism used for a folding bed marketed as a so-called “bonbon bed”. However, the ratchet mechanism 3 is not shown in the figure, but can be changed to a stop state and a release state by operating a lever or the like, and can be stopped at a plurality of tilting positions so that the back frame 2 can be folded. Other mechanisms that can be coupled to the frame 1 can also be used.

(Pedestal frame 1)
The pedestal frame 1 is a metal pipe separated into two pieces, which are substantially parallel to each other in a plan view as shown in FIG. 4, but preferably have a tapered shape in which the lateral width gradually increases toward the front. It is said. The seat frame 1 has a front width wider than a rear width, for example, wider than twice the outer diameter of the metal pipe. As will be described later in detail, the seat frame 1 can be made thin by folding the front leg frame 4 and the rear leg frame 5 connected in the front-rear direction as shown in FIGS. Front cushioning can be improved. The folding chair 100 of FIG. 2 connects the front leg frame 4 to the front end without directly connecting the front end of the two divided seat frames 1 and the front leg frame 4 with a metal pipe, The rear leg frame 5 is connected to the part.

  The seat 11 has a sheet material 9 stretched between the two seat frames 1. For this reason, as shown in the plan view of FIG. 4, the two base frames 1 are arranged in a tapered shape so that the lateral width gradually increases toward the front, so that the lateral width of the sheet material 9 also gradually increases toward the front. Become. Thus, by widening the width of the front part of the sheet material 9, the sheet material 9 in this part is easily deformed, and the cushioning property at the front part of the seat 11 can be improved to improve the sitting comfort. In particular, when the user is sitting on the pedestal 11, as shown in FIG. 5, the sheet material 9 bends as shown by the chain line in the figure with respect to the user's load (indicated by an arrow A). The cushioning property can be further improved by a synergistic effect of the seat frame 1 moving in the direction approaching the inside (indicated by an arrow B). Here, since most of the weight of the user sitting on the pedestal 11 is applied to the buttocks, this load acts on the sheet material 9 of the pedestal 11 from the central part to the rear part. On the other hand, since the load of the user's leg is mainly applied to the front portion of the pedestal 11, the load is smaller than that of the buttocks. In the above chair, the cushion at the front part of the seat 11 can be made flexible, so that it is possible to improve the sitting comfort by realizing excellent flexibility for the leg part with a small load.

  Furthermore, the pedestal frame 1 of FIGS. 1 to 3 is provided with an inclined portion 1X inclined in a downward gradient at the front portion, and the front portion of the sheet material 9 is connected to the inclined portion 1X. The seat frame 1 has a feature that it can be comfortably supported without strongly pushing up the legs because the front portion of the seat 11 is inclined downward.

(Back frame 2)
The back frame 2 has a shape formed by connecting the upper ends of two separated metal pipes 2A with a connecting arm 2B. The back frame 2 shown in FIG. 2 has two metal pipes 2A arranged in parallel to each other, and two connecting arms 2B are fixed to the upper ends of the two metal pipes 2A with the upper and lower parts separated from each other. Yes. As described above, the structure in which the two upper ends of the two metal pipes 2A are connected by the connecting arm 2B is such that when the back frame 2 is tilted, the two metal pipes 2A are connected to each other. There is a feature that can prevent the twisting posture. The two connecting arms 2 </ b> B have a curved shape that protrudes toward the center toward the rear, and form a headrest portion that supports the user's head with the user leaning on the backrest 12. Further, the back frame 2 shown in the figure has a shape in which two metal pipes 2A are curved in a central recess in a state parallel to each other. As a result, the backrest surface of the backrest 12 is used as a curved surface with a central recess to improve sitting comfort. The back frame 2 connects the lower end of each metal pipe 2 </ b> A to the seat frame 1 via a ratchet mechanism 3.

(Front leg frame 4, rear leg frame 5)
The front leg frame 4 and the rear leg frame 5 are foldably connected to the front and rear of the seat frame 1. As shown in FIGS. 2 and 3, the front leg frame 4 and the rear leg frame 5 allow the seat frame 1 to be arranged at a predetermined height and posture when the chair is in use. The front leg frame 4 and the rear leg frame 5 are stopped so as to spread downward in a side view, and the seat frame 1 is stopped in a substantially horizontal posture, more precisely in a posture in which the front is inclined slightly upward. . The rear leg frame 5 has a larger tilt angle (α) with respect to the seat frame 1 than the front leg frame 4, and prevents the chair from falling backward in the state where the back frame 2 is tilted to the horizontal position. The user 1 can comfortably sit on the pedestal 11 as the posture in which 1 is inclined downward toward the rear. The front leg frame 4 and the rear leg frame 5 are stopped at a predetermined angle by the stopper mechanism 13.

  The front leg frame 4 and the rear leg frame 5 are formed in a U shape by bending both ends of a metal pipe to connect the connection frames 4B and 5B to both sides of the horizontal frames 4A and 5A. As shown in FIG. 5, the front leg frame 4 has a flared shape that connects the connecting frame 4B to both ends of the horizontal frame 4A at a slightly acute angle rather than a right angle, and the front end (upper end in the figure) of the connecting frame 4B is a base frame. It is connected so that it can tilt to 1. FIG. 9 is an enlarged view of a connecting portion between the front leg frame 4 and the seat frame 1. As shown in this figure, the seat frame 1 has a connecting piece 1a protruding below the front end, and the tip connecting part 4b of the connecting frame 4B can be rotated in a vertical plane by this connecting piece 1a. In this way, the shaft pins 14 are connected. The front leg frame 4 tilts from the position supporting the seat frame 1 shown in FIG. 9A to the folding position of the front leg frame 4 shown in FIG.

  Further, the front leg frame 4 of FIG. 5 has a shape in which the entire frame is widened with the inclination angle (β) of the connecting frame with respect to the horizontal frame 4A as an acute angle. As described above, the front leg frame 4 of this shape is configured so that the pedestal frames on both sides are shown by the arrow B in FIG. 5 with respect to the user's load indicated by the arrow A in FIG. It can be made easy to approach in the direction shown. This is because the connecting frame 4B of the front leg frame 4 can be elastically deformed with respect to the horizontal frame 4A with respect to the horizontal frame 4A by making the connecting frame 4B flared. In this way, the front leg frame 4 having a hem-wide shape as a whole is connected to both sides in the direction in which the two seat frames 1 are brought close to each other with respect to the load applied to the front portion of the seat material 9 of the seat 11. The cushioning property in the front part of the seat 11 can be improved by elastically deforming the frame 4B. Here, the inclination angle (β) of the connecting frame 4B with respect to the horizontal frame 4A of the front leg frame 4 is 60 degrees or more, preferably 70 degrees or more.

  As shown in FIGS. 2 and 5, the rear leg frame 5 has a shape in which the connecting frame 5B is connected to both ends of the horizontal frame 5A at a substantially right angle, and the front end (upper end in the figure) of the connecting frame 5B is connected to the base frame 1 It is connected so that it can tilt. FIG. 10 is an enlarged view of a connecting portion between the rear leg frame 5 and the base frame 1. As shown in this figure, the seat frame 1 has a connecting piece 1b protruding below the rear end portion, and the tip connecting portion 5b of the connecting frame 5B is rotated on the connecting piece 1b in a vertical plane. It is connected via a shaft pin 14 so that it can be made. The rear leg frame 5 is tilted from the position supporting the seat frame 1 shown in FIG. 10A to the folding position of the rear leg frame 5 shown in FIG. .

  In the folding chair described above, the front leg frame 4 is connected to the front end portion of the seat frame 1 and the rear leg frame 5 is connected to the rear end portion of the seat frame 1. The distance between the connecting frames 5B of the rear leg frame 5 is wider. This is because the two seat frames 1 have the front portion wider than the rear portion. The front leg frame 4 and the rear leg frame 5 are arranged in the folded state shown in FIGS. 7 and 8 so that the connecting frame 5B of the rear leg frame 5 is arranged inside the connecting frame 4B of the front leg frame 4 so as not to overlap. Can be folded in a thin state. In particular, the front leg frame 4 shown in FIG. 5 is connected to the both ends of the horizontal frame 4A in a posture in which the inclination angle (β) is an acute angle, so that the entire shape is a flared shape. In the folded state, the connecting frame 5B of the rear leg frame 5 can be securely folded inside the connecting frame 4B of the front leg frame 4 to prevent them from overlapping.

(Stopper mechanism 13)
As shown in FIG. 3, the stopper mechanism 13 specifies the stop positions of the front leg frame 4 and the rear leg frame 5 that tilt with respect to the seat frame 1, and is supported by the front leg frame 4 and the rear leg frame 5. The posture of the base frame 1 is specified. The stopper mechanism 13 stops the front leg frame 4 with respect to the seat frame 1 at a predetermined tilt angle (α1), and stops the rear leg frame 5 with respect to the seat frame 1 at a predetermined tilt angle (α2). The front leg frame 4 and the rear leg frame 5 are stopped so as to expand toward the bottom in a side view.

  The stopper mechanism 13 shown in FIG. 9 is a convex portion provided in a posture projecting forward in the vicinity of the distal end coupling portion 4b that is the coupling portion with the shaft pin 14 at the distal end portion of the coupling frame 4B of the front leg frame 4. 13A. As shown in FIG. 9A, the stopper mechanism 13 that is the convex portion 13 </ b> A is in contact with the lower surface of the front end portion of the seat frame 1 in a state in which the front leg frame 4 is tilted forward, so that the front leg frame 4 is predetermined. Is stopped at the tilt angle (α1).

  The stopper mechanism 13 shown in FIG. 10 is a protrusion provided in a posture that protrudes rearward in the vicinity of the distal end coupling portion 5b that is the distal end portion of the coupling frame 5B of the rear leg frame 5 and is a coupling portion with the shaft pin 14. Part 13B. As shown in FIG. 10A, the stopper mechanism 13 that is the convex portion 13 </ b> B is in contact with the lower surface of the rear end portion of the seat frame 1 while tilting the rear leg frame 5 backward. 5 is stopped at a predetermined tilt angle (α2).

  The tilt angle (α2) of the rear leg frame 5 with respect to the seat frame 1 is larger than the tilt angle (α1) of the front leg frame 4, and the seat frame 1 is supported in a posture in which the seat frame 1 tilts downward toward the rear. Yes. The inclination angle (θ) that the seat frame 1 that inclines in a downward slope forms a horizontal plane is the connecting frame of the front leg frame 4 in addition to the inclination angle (α1) of the front leg frame 4 and the inclination angle (α2) of the rear leg frame 5. The length of 4B and the length of the connecting frame 5B of the rear leg frame 5 are specified. For example, the length of the connecting frame 4B of the front leg frame 4 and the length of the connecting frame 5B of the rear leg frame 5 are substantially equal. The tilt angle (α1) of the front leg frame 4 is 100 to 120 degrees, the tilt angle (α2) of the rear leg frame 5 is 120 to 170 degrees, and the tilt angle (θ) of the seat frame 1 is 5 to 20 degrees. be able to.

  The stopper mechanism 13 shown in FIGS. 9 and 10 has a structure provided on the front leg frame 4 and the rear leg frame 5 as convex portions 13A and 13B protruding from the connecting frames 4B and 5B. In this structure, the front leg frame 4 and the rear leg frame 5 connected to the seat frame 1 are selected so that the position and the protruding amount of the stopper mechanism 13 are optimal, so that the tilt angle (α1) of the front leg frame 4 and There is an advantage that the tilt angle (θ) of the seat frame 1 can be adjusted by adjusting the tilt angle (α2) of the rear leg frame 5. However, the stopper mechanism can also be provided as a convex portion protruding from the lower surface of the seat frame.

(Armrest 6)
Furthermore, the folding chair 100 shown in the drawing is provided with armrests 6 located on both sides of the seat 11. The armrest 6 shown in the figure is a metal pipe, and its rear end is connected to the upper and lower middle of the back frame 2, and the front part is connected to the front part of the seat frame 1 via the support frame 7. The armrest 6 is attached to the back frame 2 via the shaft pin 15 so that the rear end can be rotated in a vertical plane so that the back frame 2 can be held in a posture parallel to the seat frame 1 while being tilted. Connected to the outside, the front end is connected to the support frame 7 via the shaft pin 14 so that the front end can be rotated in the vertical plane. The armrest 6 shown in the drawing includes connecting pieces 6a and 6b that protrude downward at the rear end and the front end. The armrest 6 is connected to the outside of the back frame 2 via a shaft pin 15 so that a connecting piece 6a provided at the rear end can be rotated in a vertical plane. The armrest 6 is connected to the upper end of the support frame 7 via the shaft pin 14 so that the connecting piece 6b provided at the front end can be rotated in the vertical plane.

(Support frame 7)
The support frame 7 is a metal pipe that connects the front end of the armrest 6 to the seat frame 1 and has a length that makes the armrest 6 parallel to the seat frame 1. Further, the support frame 7 has both ends connected to the armrest 6 and the front portion of the seat frame 1 so that the armrest 6, the back frame 2, and the seat frame 1 form a parallelogram. The support frame 7 shown in the figure is connected to the connecting piece 6b of the armrest 6 via the shaft pin 14 so that the upper end can be rotated in the vertical plane, and via the shaft pin 15 so that the lower end can be rotated in the vertical plane. It is connected to the outside of the seat frame 1.

  The folding chair 100 described above has the lengths of the armrest 6 and the support frame 7, the back frame 2 and the seat frame 1 so that the armrest 6, the support frame 7, the back frame 2 and the seat frame 1 form a parallelogram. The connection position is set. As shown in FIG. 6, this structure has an armrest 6, a support frame 7, and a back frame 2 so as to hold the armrest 6 in a posture parallel to the seat frame 1 in a state where the backrest 12 is tilted. The parallelogram formed by the seat frame 1 is deformed. As shown in FIG. 4, the left and right armrests 6 are disposed outside the pedestal frame 1 and the back frame 2, and are disposed in a posture parallel to the pedestal frame 1 in plan view. Thereby, the armrest 6 can be moved in parallel to the seat 11 while the armrest 6 is moved back and forth while the user is sitting on the seat 11 and the back frame 2 is tilted.

(Grip 8)
Furthermore, the folding chair 100 includes a grip 8 in front of the armrest 6. The grip 8 shown in FIG. 3 is provided on the front portion of the armrest 6 so as to protrude upward. In the illustrated grip 8, a spherical grip 8 </ b> A and a connecting portion 8 </ b> B that connects the grip 8 </ b> A to the armrest 6 are integrally formed of plastic. The grip 8 is fixed to the armrest 6 by connecting a connecting portion 8B extended from the grip portion 8A to the front end of the armrest 6. The connecting portion 8 </ b> B of the grip 8 is curved so as to protrude upward from the front of the armrest 6, and a spherical gripping portion 8 </ b> A provided at the tip is disposed above the front of the armrest 6.

  As shown in FIG. 8, the left and right grips 8 are arranged so that the spherical grip 8 </ b> A does not contact the back frame 2 in a state where the back frame 2 is tilted and folded. Thereby, when the back frame 2 is folded, the back frame 2 can be stored between the left and right grips 8. In particular, the folding chair 100 shown in FIG. 4 has a structure in which the lateral width of the two seat frames 1 is gradually widened toward the front in a plan view, and is thus arranged in a posture parallel to the seat frame 1. As shown in FIGS. 7 and 8, the grip 8 disposed at the front portion of the armrest 6 is also moved forward so that the lateral width is widened when the backrest 12 is folded over the seat 11. As a result, the distance between the left and right grips 8 is increased. Thereby, the back frame 2 folded forward is accommodated between the left and right grips 8 without contacting the left and right grips 8A.

  The grip 8 having the above structure makes it easier to apply force by gripping the spherical grip 8A when the user tilts the back frame 2. However, the grip is not limited to a structure in which the grip portion has a spherical shape. The grip portion may be formed in an egg shape or a cylindrical shape that is easy to grip with a hand.

The folding chair 100 described above is used in the following state, folded and packed, and transported.
[Use state to move backrest]
As shown in FIG. 6, the folding chair 100 adjusts the tilt position of the backrest 12 by tilting the back frame 2 with respect to the seat frame 1. Since the back frame 2 is connected to the seat frame 1 via the ratchet mechanism 3, the back frame 2 is moved to a plurality of tilt positions (FIG. 6) from a state in which the back frame 2 is developed to a horizontal posture (indicated by “f” in FIG. 6). And can be tilted while being stopped. That is, the backrest 12 can be tilted while being raised vertically from the horizontal posture by a certain angle, and the back frame 2 can be tilted to a desired tilting position and stopped. At this time, the user can easily change the backrest 12 to a predetermined tilt position by sitting on the seat 11 and moving the armrest 6 forward. In particular, the backrest 12 can be tilted to a predetermined tilting position by moving the armrest 6 forward while holding the armrest 6 in a posture parallel to the seat frame 1. Furthermore, since the grip 8 that protrudes upward is provided at the front part of the armrest 6, the backrest 12 may be tilted forward via the armrest 6 by moving the grip 8 forward.

  Further, when the tilting position of the backrest 12 is changed backward, the back frame 2 is temporarily raised to a substantially vertical posture (indicated by e in FIG. 6) to release the stopper of the ratchet mechanism 3, and then the stopper is released. In this state, the backrest 12 is tilted to a horizontal posture (indicated by “f” in FIG. 6) to return the stopper to the operating state. Thereafter, the backrest 12 is tilted forward until the desired tilt position is reached. Also during this operation, the user raises the backrest 12 to a vertical posture (indicated by e in FIG. 6) by sitting on the pedestal 11 and moving the armrest 6 forward. By sitting and moving the armrest 6 backward, it can be tilted to a horizontal posture (indicated by “f” in FIG. 6).

[Folding chair folded]
(1) As shown in FIG. 7A, the backrest 12 is tilted so as to overlap the seat 11, and the backrest 12 is stacked on the seat 11. At this time, the armrest 6 moves forward so as to overlap the seat frame 1, and the back frame 2 is folded so as to be housed between the left and right grips 8 connected to the front portion of the armrest 6.
(2) As shown in FIG. 7B, the rear leg frame 5 is folded to the lower surface side of the seat 11.
(3) As shown in FIG. 7C, the front leg frame 4 is folded to the lower surface side of the seat 11 and laminated on the rear leg frame 5 folded first. At this time, as shown in FIG. 8, the connecting frame 4B of the front leg frame 4 is disposed outside the connecting frame 5B of the rear leg frame 5, and the connecting frames 4B and 5B can be prevented from overlapping each other. Can be folded to be thinner and more compact.
(4) As shown in FIG. 7D, the back frame 2, the rear leg frame 5, and the front leg frame 4 are packed and transported with respect to the seat frame 1 in a folded state.

  INDUSTRIAL APPLICABILITY The present invention can be conveniently used as a folding chair that can be stopped by tilting the backrest to a predetermined angle while sitting.

DESCRIPTION OF SYMBOLS 100 ... Folding chair 1 ... Seat frame 1X ... Inclined part 1a ... Connection piece 1b ... Connection piece 2 ... Back frame 2A ... Metal pipe 2B ... Connection arm 3 ... Ratchet mechanism 4 ... Front leg frame 4A ... Horizontal frame 4B ... Connection frame 4b ... tip connecting part 5 ... rear leg frame 5A ... horizontal frame 5B ... connecting frame 5b ... tip connecting part 6 ... armrest 6a ... connecting piece 6b ... connecting piece 7 ... support frame 8 ... grip 8A ... grip part 8B ... connecting part 9 ... Sheet material 9A ... Seat surface sheet portion 9B ... Back sheet portion 9a ... Connection portion 10 ... Frame 11 ... Seat 12 ... Backrest 13 ... Stopper mechanism 13A ... Convex portion 13B ... Convex portion 14 ... Shaft pin 15 ... Shaft pin

Claims (5)

A seat frame,
A back frame that can be stopped at a plurality of tilting positions via a ratchet mechanism at both rear end portions of the seat frame, and is foldably connected;
A seat material formed by connecting both sides to the seat frame and the back frame;
An armrest formed by tilting and connecting the rear end to the middle between the upper and lower sides of the back frame;
A support frame that is tiltably connected to a front portion of the armrest and has a lower end that is tiltably connected to the seat frame, and supports the armrest in a posture parallel to the seat frame;
A front leg frame that is foldably connected to a front portion of the seat frame;
A rear leg frame that is foldably connected to the rear part of the base frame;
A stopper mechanism for stopping the front leg frame and the rear leg frame in a flared shape downward in a side view;
The folding chair, wherein the armrest is moved in the front-rear direction to change the tilting position of the back frame. A grip projecting upward at the front of the armrest;
The folding chair according to claim 1, wherein the grip is moved forward so that the back frame is tilted forward via the armrest.   The folding chair according to claim 1 or 2, wherein the seat frame has a tapered shape with a width that gradually increases toward the front.   The front portion of the seat frame has an inclined portion inclined downward, and the front portion of the sheet material is connected to the inclined portion. Folding chair. The front leg frame and the rear leg frame are U-shaped by connecting connecting frames on both sides of a horizontal frame,
The tip of the connecting frame is tiltably connected to the seat frame,
Further, the distance between the connection frames of the front leg frame is wider than the distance between the connection frames of the rear leg frame, and in the folded state, the connection frame of the rear leg frame is located inside the connection frame of the front leg frame. The folding chair according to any one of claims 1 to 4, wherein the folding chair is arranged.

Images