JP5057886B2 - Folding chair - Google Patents

Description

  The present invention relates to a folding chair used when an elderly person or a disabled person takes a shower in a bathroom.

Conventionally, the folding chair as described above, for example, as shown in Patent Document 1, the rear leg is pivotally attached to the front leg part in which the backrest frame is integrated, and the rear edge of the seat part is pivotally attached to the rear leg part. In addition, a link is passed between the front portion and the middle portion of the seat portion in the front-rear direction. Then, using both hands, grasp the back frame and the front edge of the seat part, and lift the front edge of the seat part, the seat part rotates so that the lower surface of the seat part is the front side, and the seat part The folding chair is folded when the front leg portion and the rear leg portion approach each other in conjunction with the rotation.
JP 2002-191523 A

However, when the conventional folding chair is stored in a folded state, the front leg part and the rear leg part are close enough to contact each other, so they cannot stand on their own, lean against the wall, It was necessary to stand against it. Furthermore, since the lower surface of the seat portion is the front side, the appearance is inferior when folded.
The present invention has been made paying attention to such problems of the prior art, and the object of the present invention is to be able to stand up in a folded state, and in the folded state, the lower surface of the seat portion. It is to provide a folding chair that does not become the front side.

In order to achieve the above-mentioned object, the invention of the folding chair according to claim 1 is a state in which the pair of left and right front legs, the pair of left and right rear legs, and the front and rear legs are supported from below. And a seat that uses the upper surface as a seating surface, and is provided with a handle at the rear end of the seat , the rear leg side of the seat being the rear, Grab and lift the rear edge, rotate the seat so that the upper surface of the seat is the front side, fold the front leg and the rear leg close to each other, and stand up in a folded state The gist is that this is possible.
According to the said structure, since it can be made to stand in the folded state, it can be set | placed even if there is no support etc. in the spot where this folding chair was folded. As a result, when carrying a small state when carrying it in a folded state, it is possible to keep it self-supported at that position without leaning against the wall, and it is possible to carry it easily without hesitation. Moreover, since the seat is rotated so that the upper surface of the seat is on the front side, the appearance can be improved.
Conventionally, when the folding chair is carried in a folded state, it is necessary to have a backrest frame. Therefore, it is necessary to lift the folding chair up to a sufficient height while taking care that the front leg portion or the rear leg portion does not touch the floor. However, in the present invention, since the handle is provided at the rear end of the seat portion, the folding chair in a folded state can be carried by grasping the handle, so that the front leg portion or the rear leg portion is held on the floor. There is no need to take care so that it is easy to carry around.

The invention of the folding chair according to claim 2 is the invention of the folding chair according to claim 1, wherein a link bar is passed between the upper end portions of the pair of left and right front legs, and the link bar and the seat portion. The gist is that the link is passed between the front part of
The invention of the folding chair according to claim 3 is the invention of the folding chair according to claim 1, wherein a link is passed between the upper part of the pair of left and right front legs and the front part of the seat part. It is a summary.
According to the said structure, when folding a folding chair, if the rear edge of this seat part is lifted, a front leg part and a rear leg part will mutually approach in conjunction with a seat part by a link, and a folding chair will be folded. Therefore, the folding chair can be folded with one hand without using both hands.

According to a fourth aspect of the present invention, in the invention of the folding chair according to any one of the first to third aspects, the seat side frame portions are rearward from the upper ends of the pair of left and right front legs. The seat portion is bent and supported between the left and right seat side frame portions, and the seat support frame portion is bent forward at the upper ends of the pair of left and right rear leg portions, respectively. The gist of the invention is that the front ends of the support frame portions are pivotally attached to the lower surface of the seat portion, and the left and right seat support frame portions and the left and right seat side frame portions are pivotally attached to each other.
According to the above configuration, since the left and right seat support frame portions and the left and right seat side frame portions are pivotally attached to each other, the folded chair in the folded state has a conventional front leg portion and rear leg portion that are substantially the same as the conventional one. The folding chair is in a folded state because the front and rear legs are arranged side by side in the front-rear direction with a gap between them. Can be independent.

According to a fifth aspect of the present invention, in the folding chair according to the fourth aspect of the present invention, a U-shaped back frame connects the left and right seat side frame portions at the rear end of the seat side frame portion. The gist is that it is bent upward.
According to the said structure, by providing a backrest frame, while being able to sit down on a folding chair easily, the folding chair of the state which grabbed this backrest frame and was folded can also be carried.

According to a sixth aspect of the present invention, in the folding chair according to the fourth or fifth aspect, between the rear ends of the left and right seat side frame portions or between the rear ends of the left and right seat support frame portions. A lock bar is passed in the horizontal direction between the lower end of the backrest frame, and an engaging claw is disposed on the lower surface of the rear edge of the seat portion. The gist is to engage with the lock bar and to fold after releasing the engagement between the engagement claw and the lock bar.
According to the said structure, engagement with an engaging claw and a lock bar can be ensured with a spring.

The invention according to claim 7 is the invention of the folding chair according to claim 6 , wherein a grip bar is provided at the rear end of the engagement claw, and the grip bar is formed in a bar shape, arranged in parallel with 該把hand immediately below the handle, the left and right upper end of the engagement claw is pivotally mounted on the rear edge of the lower surface of each said seat portion, the該掴seen bar grabbed該把hand with該掴seen bar The gist of the invention is that when the handle is pulled, the engaging claw rotates and the engagement between the engaging claw and the lock bar is released.
According to the above configuration, the grip bar is formed in a rod shape and arranged parallel to the handle, so that the grip bar can be gripped together with the handle so as to grip the handle. For this reason, it becomes possible to move the grip bar by applying force with the entire palm. Compared with the case where the grip bar is moved by applying force only with a finger, the grip bar can be used even for those who have no grip strength, especially the elderly and the disabled. Easy operation.

  ADVANTAGE OF THE INVENTION According to this invention, a folding chair can be made to stand in the folded state, and when it folds, the lower surface of a seat part does not become a front side but can improve appearance.

Hereinafter, an embodiment embodying the folding chair of the present invention will be described.
1 to 6 are a front view, a rear view, a top view, a bottom view, a side view, and a side cross-sectional view showing the folding chair of the embodiment in order.
The folding chair 10 includes a pair of left and right front legs 11, a pair of left and right rear legs 12, and a seat 13 supported from below by the pair of left and right front legs 11 and the pair of left and right rear legs 12. ing. Further, the folding chair 10 includes a backrest 14 and an elbow rest 15.

From each upper end of the pair of left and right front leg portions 11, a seat side frame portion 16 is formed to extend rearward (see FIGS. 4 and 5). From the rear ends of the pair of left and right seat side frame portions 16, a U-shaped backrest frame 17 is formed to extend upward so as to connect the left and right seat side frame portions. The pair of left and right front legs 11, the pair of left and right seat side frames 16 and the backrest frame 17 are bent from a single pipe.
A link bar 18 is passed between the upper end portions of the left and right front leg portions 11. A front support bar 19 is passed between the front end portions of the left and right seat side frame portions 16 (see FIGS. 4 and 5). A lock bar 20 is passed between the rear end portions of the left and right seat side frame portions 16 (see FIGS. 4 and 5).

  The front leg portion 11 includes a front leg upper pipe 11A and a front leg lower pipe 11B in which the front leg upper pipe 11A is slidably inserted (see FIG. 5). The front leg upper pipe 11A is provided with an insertion pin 11D. The insertion pin 11D is provided so as to protrude on the outer peripheral surface of the front leg upper pipe 11A by being biased from the inside of the front leg upper pipe 11A. On the other hand, the front leg lower pipe 11B is provided with a plurality of locking holes 11C. When the length of the front leg portion 11 is adjusted, the front leg lower pipe 11B is moved with respect to the front leg upper pipe 11A while pushing the insertion pin 11D into the front leg upper pipe 11A, and the insertion pin 11D is moved to a predetermined length. The front leg lower pipe 11B is fixed to the front leg upper pipe 11A by engaging with the engaging hole 11C. Thus, the front leg portion 11 is configured to be adjustable in length by appropriately changing the engagement hole 11C for engaging the insertion pin 11D. Furthermore, a rubber anti-slip cap 11E is attached to the lower end of the front leg lower pipe 11B to prevent the front leg 11 from slipping on the floor.

The backrest 14 is attached to the upper edge of the backrest frame 17. The backrest 14 may be fixed to the upper edge of the backrest frame 17 or may be rotatably attached. When the backrest 14 is pivotably attached to the upper edge of the backrest frame 17, the angle of the backrest 14 can be adjusted according to the physique of the user. A gripping hole 14A is provided in the upper part of the backrest 14, and the folding chair 10 can be moved or lifted using the gripping hole 14A.
The elbow rest 15 is attached to each of the left and right sides of the backrest frame 17. The elbow rest 15 may be attached to the back frame 17 so as to be pivotable upward or may be fixed. When the elbow rest 15 is attached to the backrest frame 17 so as to be pivotable upward, the elbow rest 15 does not get in the way when a user sits on the folding chair 10 or when the folding chair 10 is folded. As described above, there is an effect that it can be rotated upward.

As described above, a pair of left and right rear legs 12 is provided, but a seat support frame 21 is formed to extend forward from the upper ends of the pair of left and right rear legs 12 ( (See FIGS. 4 and 5). The pair of left and right rear leg portions 12 and the pair of left and right seat support frame portions 21 are each bent from a single pipe.
The front end (front end) of the seat support frame portion 21 is pivotally attached to a rotating seat 13A provided at an intermediate portion in the front-rear direction on the lower surface of the seat portion 13. Accordingly, the rear leg portion 12 is configured to be rotatable in the vertical direction with respect to the seat portion 13 together with the seat support frame portion 21. The seat support frame portion 21 and the left and right seat side frame portions 16 arranged outside the seat support frame portion 21 are pivotally attached to each other at an intermediate portion in the front-rear direction by a rotation shaft 23. As a result, the rear leg portion 12 and the seat support frame portion 21, and the front leg portion 11 and the left and right seat side frame portions 16 are relatively rotatable in the vertical direction around the rotation shaft 23. It is configured. A rear support bar 22 is passed between the rear ends of the left and right seat support frame portions 21 (see FIGS. 4 and 5).

  The rear leg portion 12 includes a rear leg upper pipe 12A and a rear leg lower pipe 12B in which the rear leg upper pipe 12A is inserted (see FIG. 5). The rear leg upper pipe 12A is provided with an insertion pin 12D, and the insertion pin 12D is urged from the inside of the rear leg upper pipe 12A so as to be placed on the outer peripheral surface of the rear leg upper pipe 12A. It is provided to protrude. On the other hand, the rear leg lower pipe 12B is provided with a plurality of locking holes 12C. When adjusting the length of the rear leg 12, the insertion pin 12D is moved into the rear leg upper pipe 12A while pushing the insertion pin 12D into the rear leg upper pipe 12A, and the insertion pin 12D is moved. Is engaged with a predetermined locking hole 12C, and the rear leg lower pipe 12B is fixed to the rear leg upper pipe 12A. Thus, the rear leg portion 12 is configured to be adjustable in length by appropriately changing the locking hole 12C for engaging the insertion pin 12D. Further, a rubber anti-slip cap 12E is attached to the lower end of the rear leg lower pipe 12B to prevent the rear leg 12 from sliding on the floor.

The seat portion 13 is used with its upper surface 13B as a seating surface. A link seat 13 </ b> C is provided on the lower surface of the seat portion 13 at the front. A link 24 is passed between the link seat 13C and the link bar 18 of the front leg 11. The link 24 moves the front leg portion 11 and the seat side frame portion 16 in conjunction with the seat portion 13 when the seat portion 13 is rotated in the vertical direction with respect to the seat support frame portion 21. It functions to rotate with respect to the rear leg portion 12 and the seat support frame portion 21.
In the folding chair 10 of the present invention, the link bar 18 is omitted, and the link 24 is placed between the link seat 13C at the front portion of the seat portion 13 and the upper portions of the pair of left and right front leg portions 11. You may hand it over.

A pair of left and right front support seats 13 </ b> D are provided on the lower surface of the seat portion 13 in front of the middle portion in the front-rear direction. The front support seat 13D is placed on the front support bar 19 of the seat side frame portion 16. Then, by placing the front support seat 13D on the front support bar 19, the seat portion 13 is supported between the left and right seat side frame portions 16 via the front support bar 19.
A pair of left and right rear support seats 13E are provided on the lower surface of the seat portion 13 on the rear side from the middle portion in the front-rear direction. The rear support seat 13E is placed on the rear support bar 22 of the seat support frame portion 21. Then, the rear support seat 13E is placed on the rear support bar 22, and the front end of the seat support frame portion 21 is pivotally attached to the lower surface of the seat portion 13 via the rotating seat 13A. The seat portion 13 is supported on the left and right seat support frame portions 21.

Fig.7 (a) is the sectional side view to which the rear edge part of the seat part of the folding chair was expanded.
A concave portion 13F is formed on the lower surface of the rear edge portion of the seat portion 13 at the rear edge of the seat portion 13, and the top surface portion 13G of the concave portion 13F is cut away leaving a peripheral edge portion. A handle 25 that is a rear edge portion is provided. An operation handle 26 is provided below the handle 25 inside the recess 13F on the lower surface of the rear edge of the seat portion 13.
The operating handle 26 includes a pair of left and right engaging claws 27, a connecting rod 28 having an L-shaped cross section passed between the front end portions (between the front end portions) of the left and right engaging claws 27, and a rear end portion. It consists of a round bar-shaped grip bar 29 passed between them. In the operation handle 26, a shaft 30 is provided at the tip of one side surface (outer surface) of each engagement claw 27. When the shaft 30 is pivotally attached to the inside of the recess 13F on the lower surface of the rear edge of the seat portion 13, the grip bar 29 approaches or separates from the handle 25 around the shaft 30. Thus, it is attached so that it can be rotated in the vertical direction (see FIGS. 7A and 7B). Further, the grip bar 29 is arranged so as to be parallel to the handle 25 and not to protrude rearward from the rear edge of the seat portion 13.
Further, a spring 31 is provided between the upper surface of the rear end portion of the engaging claw 27 and the lower surface of the rear edge portion of the seat portion 13 and the top surface portion 13G of the recess 13F. The spring 31 constantly urges the operation handle 26 in a direction (downward) in which the grip bar 29 is separated from the handle 25. The operation handle 26 urged by the urging force of the spring 31 engages the engagement claw 27 with the lock bar 20.

Here, since the grip bar 29 is disposed so as not to protrude rearward from the rear edge of the seat portion 13, when the folding chair is used, the user's body hits the grip bar 29 or a towel is used. And the like, and the engagement between the engagement claw 27 and the lock bar 20 is prevented from being accidentally released during use.
Further, since the engaging claws 27 are paired on the left and right sides and are engaged with the left and right portions of the lock bar 20, the lock bar 20 is securely fixed by the engaging claws 27.

A folding method of the folding chair 10 will be described.
When folding the folding chair 10 of the present invention, first, both the grip 25 and the grip bar 29 on the rear edge of the seat 13 are grasped together with one hand to unlock the seat. Next, when the seat portion 13 is lifted while holding both the handle 25 and the grip bar 29, the front leg portion 11 and the rear leg portion 12 approach each other. At this time, the position of the handle 25 in the front-rear direction of the folding chair 10 and the position of the center of gravity of the folding chair 10 are slightly shifted, but the front leg portion 11 and the rear leg portion 12 approach each other while sliding on the floor while being grounded. The chair 10 does not tilt. When the seat portion 13 is further lifted, the front leg portion 11 and the rear leg portion 12 finish approaching and the folding chair 10 is completely folded away from the floor.
When the folding chair 10 is in the folded state and the folding chair 10 is lifted by the grip 25 of the seat 13 being gripped, the position of the grip 25 in the front-rear direction of the folding chair 10 and the position of the center of gravity of the chair 10 are determined. Since they are set to match, the chair 10 maintains a vertical state without tilting. Finally, the chair 10 can be made to stand by simply resting the chair 10 in the folded state on the floor again.
As described above, the folding chair 10 is folded by grasping and lifting the rear edge of the seat 13, rotating the seat 13 so that the upper surface of the seat 13 is on the front side, and further 11 and the rear leg 12 are completed by bringing them closer together.
7 (b) and 7 (c) are enlarged side sectional views of the rear edge of the seat when folded.
When the folding chair 10 is folded, when the rear edge of the seat 13 is gripped, the grip bar 29 is arranged in parallel with the handle 25, so that the handle 25 is gripped together with the handle 25. The grip bar 29 can be gripped (see FIG. 7B). As a result, the grip bar 29 can be moved by applying force to the entire palm while being a natural operation of grasping the grip 25, and even for those who do not have a grip force, particularly elderly people and disabled persons, the grip bar 29 Can be operated easily.

If the grip bar 29 is gripped together with the handle 25 as described above, the entire operation handle 26 rotates upward about the shaft 30 against the biasing force of the spring 31 as the grip bar 29 moves. Then, the engagement between the engagement claw 27 and the lock bar 20 is released. At this time, since the left and right engaging claws 27 are connected by the connecting rod 28 and the gripping bar 29, by moving the gripping bar 29, the left and right engaging claws 27 move in conjunction, The disengagement operation of the left and right engaging claws 27 with respect to the lock bar 20 can be reliably performed at one time.
Then, after the engagement between the engagement claw 27 and the lock bar 20 is released, the user grasps and lifts the rear edge of the seat 13 while holding the handle 25 (FIG. 7 (c)). )reference). Then, the link 24 moves so that the front leg portion 11 approaches the rear leg portion 12 in conjunction with the seat portion 13, and the rear leg portion 12 moves so as to approach the front leg portion 11. Is folded.
In the folding method, the rear edge of the seat 13 can be grasped and lifted with one hand without using both hands. That is, regarding the movement of the front leg portion 11 and the rear leg portion 12, when the front leg portion 11 and the rear leg portion 12 are lifted by grasping the rear edge of the seat portion 13, the weight of the seat portion 13 is increased. It moves naturally as if hung on the surface.

FIG. 8 is a front view of the folding chair in a folded state, and FIG. 9 is a side view thereof.
In the folding chair 10 in the folded state, the seat side frame portion 16 and the seat support frame portion 21 are pivotally attached to each other in the middle portion in the front-rear direction, so that the front leg portion 11 and the rear leg portion 12 are in between. They are arranged in the front-rear direction with a gap. For this reason, the folding chair 10 in a folded state can be made independent by being supported by the front leg portion 11 and the rear leg portion 12.
The folded chair 10 in a folded state is carried by grasping the handle 25 of the seat portion 13. That is, in the folding chair 10 in the folded state, the length from the handle 25 of the seat portion 13 to the lower end of the front leg portion 11 or the rear leg portion 12 is shorter than when the backrest 14 is provided. The front leg portion 11 or the rear leg portion 12 is difficult to hit the floor. Accordingly, even a person who is not strong, particularly an elderly person or a handicapped person, can easily lift the front leg part 11 or the rear leg part 12 so as not to touch the floor, so that the front leg part 11 or the rear leg part 12 is dragged to the floor. Troubles to carry are eliminated.
And the folding chair 10 will be in the folding state by this seat part 13 making the upper surface 13B the front side. In the seat portion 13, various things such as a rotating seat 13 </ b> A, a link seat 13 </ b> C, a front support seat 13 </ b> D, a rear support seat 13 </ b> E, an operation handle 26 and the like are disposed on the lower surface. . Various things that deteriorate the appearance of the folding chair 10 when the folding chair 10 in the folded state is viewed from the front side by folding the folding chair 10 with the upper surface 13B on the front side. Can do.

In addition, the folding chair of this invention is not limited to the said embodiment, For example, you may provide a lock bar between the lower ends of a backrest frame, or between the rear ends of a right-and-left seat support frame part.
Further, the folding chair may be configured by omitting at least one of the backrest 14 and the elbow rest 15.

The front view which shows the folding chair of embodiment. The rear view which shows the folding chair of embodiment. The top view which shows the folding chair of embodiment. The bottom view which shows the folding chair of embodiment. The side view which shows the folding chair of embodiment. The sectional side view which shows the folding chair of embodiment. (A)-(c) is sectional drawing which shows operation at the time of folding of a folding chair. The front view which shows the folding chair of the state folded. The side view which shows the folding chair of the state folded.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Folding chair 11 Front leg part 12 Rear leg part 13 Seat part 13B Upper surface 16 Seat side frame part 17 Back frame 18 Link bar 20 Lock bar 21 Seat support frame part 24 Link 25 Grip 27 Engagement claw 28 Connecting rod 29 Grasping bar

Claims (7)

A folding chair comprising a pair of left and right front legs, a pair of left and right rear legs, and a seat that uses the upper surface as a seating surface while being supported from below by the front legs and the rear legs,
A grip is provided at the rear end of the seat , and the rear leg side of the seat is rearward, and the rear edge of the seat is grasped and lifted so that the upper surface of the seat is the front side. A folding chair characterized in that the seat can be rotated, and the front leg and the rear leg can be folded close to each other, and can be self-supported in a folded state.   The folding chair according to claim 1, wherein a link bar is passed between upper end portions of the pair of left and right front leg portions, and a link is passed between the link bar and the front portion of the seat portion.   The folding chair according to claim 1, wherein a link is passed between an upper portion of the pair of left and right front legs and a front portion of the seat.   From the upper ends of the pair of left and right front legs, seat-side frame portions are bent rearward, and the seat portions are supported between the left and right seat-side frame portions, and the upper ends of the pair of left and right rear leg portions. Each of the seat support frame portions is bent forward and the left and right ends of the seat support frame portions are pivotally attached to the lower surfaces of the seat portions, and the left and right seat support frame portions and the left and right seats The folding chair according to any one of claims 1 to 3, wherein the side frame portions are pivotally attached to each other. 5. The folding chair according to claim 4 , wherein a U-shaped backrest frame is formed at the rear end of the seat side frame portion so as to be bent upward so as to connect the left and right seat side frame portions. Between the rear ends of the left and right seat-side frame portions, between the rear ends of the left and right seat support frame portions, or between the lower ends of the backrest frames, a lock bar is passed in the left-right direction,
An engaging claw is disposed on the lower surface of the rear edge of the seat, and the engaging claw is engaged with the lock bar by a biasing force of a spring.
The folding chair according to claim 4 or 5, wherein the folding chair is folded after releasing the engagement between the engagement claw and the lock bar. A grip bar is provided at the rear end of the engagement claw,
The grip bar is formed in a rod shape, and is disposed immediately below the handle and in parallel with the handle .
The left and right upper ends of the engaging claws are pivotally attached to the rear edge portion of the lower surface of the seat portion,
If該掴attracted only bar with該把hands grabbing該掴seen bar該把hand, according to claim 6, engaging claw is engagement between the rotation to the engagement claws and the lock bar is released Folding chair.

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