JP2740751B2 - Folding chair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding chair which can be folded and stacked.

[0002]

2. Description of the Related Art As a folding chair of this type, a front frame having front legs extending downward continuously from an upper end portion having a backrest, and an upper end portion can abut on a predetermined position on a rear surface of the front frame. 2. Description of the Related Art There is known a rear leg, a seat pivotally attached to the rear leg and the front frame, and a link member connecting the front frame and the vicinity of the upper end of the rear leg. In such a chair, the upper end of the rear leg is brought into contact with the predetermined position of the front frame to establish a use posture, and when not in use, the front end of the seat is rotated rearward to rotate the upper end of the front frame and the rear leg. The contact between the front frame and the rear leg is released by releasing the contact with the section, and the storage position is set.

[0003]

However, in such a structure, the front frame and the rear leg substantially overlap and the upper end of the front frame and the rear leg are separated from the storage posture to the use posture. When changing the chair, just before the chair is completely in the use position, that is, the upper end of the rear leg does not abut the predetermined position of the front frame, and a slight gap is formed between the upper end of the rear leg and the front frame. The occupant may sit on a chair when it is awake. In such a case, the chair can be brought into the use posture by sitting on the chair, but at this time, if a finger or clothing is unknowingly inserted near the upper end of the rear leg or near a predetermined position of the front frame, the chair may become in use. There is a possibility that a finger or clothing may be pinched when the user takes a use posture. In addition, when the chair is lifted, such as when trying to move the chair while sitting on the chair, the front end of the seat pivots backward, and the rear leg and the front frame temporarily move to the predetermined position. Contact may be broken. Even in such a case, if a finger or clothing is unintentionally hanged on a predetermined position, if the user sits in that state, the finger or clothing may be pinched.

An object of the present invention is to eliminate such a risk in a chair as much as possible and to reduce the probability of occurrence of an unexpected accident as much as possible.

[0005]

Each invention of the present Application SUMMARY OF THE INVENTION In order to achieve the above object, in which took measures as described below. That is, folding chair of <br/> invention according to claim 1 of the present patent application has a front frame made of round pipe made comprising legs before extending downward continuously to an upper end portion having a backrest, the upper portion A rear leg capable of abutting a predetermined position on a rear surface of the front frame, a seat pivotally attached to the rear leg and the front frame, and a link member connecting the front frame and a portion near the upper end of the rear leg; In a chair used by contacting the upper end of the leg to the predetermined position of the front frame, a holding member for holding the upper end of the rear leg in contact with the predetermined position of the front frame in use is provided . Holding member
Is provided at the upper end of the rear leg,
And an engaging portion that engages with
The engagement part is released so that the engagement can be released by applying force.
In the first half of the previous frame at the predetermined position of the previous frame
It is characterized by engaging with the side so that it goes around
And

Further, the folding according to the invention according to claim 2 of the present application.
The armchair extends downward continuously to the upper end with the backrest.
A front frame having a lengthened front leg, and
A rear leg capable of abutting a predetermined position on a rear surface of the front frame;
A seat pivotally attached to the legs and the front frame, and the front and rear frames
And a link member for connecting the vicinity of the upper end of the leg.
Use the upper end of the leg in contact with the specified position on the front frame.
In the chair to be used, in the use state,
Holder that holds the front frame in contact with the specified position
Material, and the holding member is configured to be openable and closable.
Hold the specified position of the front frame and the upper end of the rear leg in the state
Cover part, extending below the lower edge of the cover part and closed
Engages the link member to prohibit the movement of the cover
And the lower side of the holding member is linked in use.
It is attached so that it almost matches the upper surface of the member
And

[0007]

With such a construction, the holding member holds the contact state between the front frame and the upper end of the rear leg.
When the upper end abuts on a predetermined position of the front frame in the use state, the state is maintained until the upper end is removed from the front frame or the rear leg to which the holding member is attached. Therefore, for example, even if the chair in use is lifted from the floor for movement, the seat tilts backward and the rear leg rotates, and the upper end of the rear leg cannot separate from the front frame,
Therefore, a situation in which a gap is formed between the front frame and the upper end of the rear leg does not occur. As a result, it is possible to prevent a finger or clothes from being inadvertently caught in the gap, and it is possible to reduce the probability of occurrence of an unexpected accident as much as possible.

[0008] In the invention according to claim 1 of the present application, the holding member state, and are not provided with an engaging portion engaged with the front frame by provided elastic deformation on the upper end of the rear leg, the engaging portion By releasing the engagement, the contact state between the front frame and the rear leg is eliminated, and in addition to the above-described operation, the folding operation can be facilitated when putting away after use.

Further, in the invention according to claim 2 of the present application,
The holding member is configured to be openable and closable, and covers the predetermined position of the front frame and the upper end of the rear leg in the closed state, and extends below the lower edge of the covering part and is closed to the link member. der those with an engagement piece to prohibit movement of the cover portion engages is, if the movement from the position surrounds remove the engagement piece from the link member, ready to eliminate the contact state Therefore, the folding operation becomes easy as described above.

[0010]

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the folding chair 1 has a front frame 4 having a front leg 3 continuously extending downward at an upper end portion having a backrest 2, and an upper end portion 5a having the front frame 5a. A rear leg 5 capable of abutting a predetermined position P on the rear surface of the rear frame 4; a side surface near the rear edge is rotatably supported by the rear leg 5; A seat 6 movably supported, a link member 10 connecting the front frame 4 and a portion near the upper end of the rear leg 5,
A holding member 7 for holding the upper end portion 5a of the rear leg 5 at a predetermined position P of the front frame 4 in a use state. The folding chair 1 is used with the upper end 5a of the rear leg 5 in contact with a predetermined position P on the front frame 4 and the seat 6 is used.
By rotating the front end of the front frame 2 in two directions of the backrest, the front frame 4 and the rear leg 5 can be substantially overlapped.

The front frame 4 is made of a round steel pipe.
A side surface of a seat frame 9, which includes a front leg 3 located below the seat 6 and a back support rod 8 located above the seat 6, and forms a side surface of the seat 6, is rotatable via a link member 10. I support it. For example, the front legs 3 are connected to each other at a substantially central portion in the height direction by a horizontal rod 11, and a cap 12 made of synthetic resin is fitted to a lower end mounted on the floor surface.
The back support rod 8 has an upper end formed in a substantially U-shape and a bent end bent further rearward.
Has been erected.

The rear leg 5 is formed by bending a single round steel pipe into a substantially U-shape, and has a base rod 13 mounted on the floor at the bent end thereof. A holding member 7 made of synthetic resin is fitted. The rear leg 5 is connected to the front frame 4 via a link member 10 and is pivotally attached to the side surface of the seat frame 9 via a bracket 9a. The attached holding member 7 contacts a predetermined position P on the rear surface of the back support rod 8 and elastically engages with the front frame 4.

As shown in FIGS. 3 and 4, the holding member 7 is in contact with a predetermined position P of the front frame 4 to support the front frame 4, and the receiving portion 14 is in contact with the predetermined position P. At this time, an engaging portion 15 which is elastically deformed and engages with the front frame 4 to lock the rear leg 5 to the front frame 4 is inserted and fitted into a round pipe formed below the rear leg 5. And the fitting part 16 formed integrally with a synthetic resin.

The receiving portion 14 prevents metal from contacting when the side surface of the round pipe of the front frame 4 and the upper end of the round pipe of the rear leg 5 come into contact with each other. As shown in FIG.
The upper end is formed in a concave shape at the center so that a part of a circular arc which is the side shape of the round pipe of the front frame 4 can be in close contact.

As shown in FIG.
In use, it elastically clamps the round pipe of the front frame 4 and is integrally formed on the left and right ends of the receiving portion 14. The engaging portion 15 is elastically deformable in the left-right direction, and its tip is curved in a direction approaching each other, and the maximum separation distance closer to the receiving portion 14 than the curved portion is substantially equal to the diameter of the front frame 4. In use, the front frame 4 is tightly clamped so as to go around the side surface of the predetermined position P of the front frame 4 and the front half . As shown in FIG.
When the upper end portion 5a of the rear leg 5 is pressed against the predetermined position P of the front frame 4 with a predetermined force or more, the engaging portion 15 is elastically deformed and its front ends are temporarily separated from each other. Combine. The engagement between the engaging portion 15 and the front frame 4 is not released unless a force equal to or more than a predetermined value is applied in a direction in which the upper end portion 5a of the rear leg 5 is separated from the predetermined position P.

The seat 6 has a cushion material attached on a seat plate,
It comprises a seat body surrounding the cushioning material with a covering material, and a seat frame 9 supporting the seat body. The structure of the seat 6 and the backrest 2 may be the same as those widely known in the art.

The link member 10 is operated to move the lower end of the rear leg 5 closer to the lower end of the front leg 3 in conjunction with the seat 6 when the seat 6 is rotated. Each is mounted on the rear leg 5. That is, as shown in FIG. 2, one end of the link member 10 is
Is pivoted slightly below the predetermined position P, and the other end is
Of the front frame 4 is mounted slightly below the upper end 5a of the front frame 4.
It is a plate-like member that connects the rear leg 5 and the rear leg 5.

In such a configuration, at the time of use, the seat 6 folded at the time of storage is pushed down in the front lower direction,
The upper end portion 5a of the rear leg 5 is pressed against a predetermined position P of the front frame 4 by a force greater than a predetermined value. As a result, as shown in FIG. 5, the engaging portion 15 temporarily engages with the front frame 4 at the tip thereof. That is, as shown in FIGS.
The lower ends of the front frame 4 and the rear leg 5 are largely opened in the front-rear direction, and the holding member 7 is fitted therein.
And the rear leg 5 and the front frame 4 hold the seat 6 in a substantially horizontal state inclined slightly backward. At this time, the holding member 7 is in contact receiving portion 14 is in position P of the front frame 4, at a predetermined position P of the engaging portion 15 is the front frame 4
As long as the upper end 5a of the rear leg 5 does not exert a predetermined force or more in a direction away from the predetermined position P, the engaging portion 15
And the front frame 4 is not disengaged.

Therefore, even if the chair 1 is lifted to move in the use state, the engaging portion 15 is engaged with the front frame 4, and the engagement between the upper end 5a of the rear leg 5 and the front frame 4 is not established. It will not be released. That is, hind legs 5
Of the front frame 4 is kept in contact with a predetermined position P of the front frame 4. Therefore, the predetermined position P of the front frame 4 is not exposed, and it is possible to prevent the user from unintentionally touching the vicinity of the predetermined position P where the finger or the like may be pinched. And so on.
Thus, the probability of occurrence of an unexpected accident can be reduced as much as possible.

Further, as shown in FIG. 6, when the rear leg 5 leans forward and the lower ends of the front leg 3 and the rear leg 5 approach each other, the distance between the back support rod 8 and the upper end 5a of the rear leg 5 is increased. There is a gap in which a finger can be inserted. However, in such a state, the seat 6 is inclined backward so sharply that it is impossible to seat. Therefore, since it is impossible for the user to sit on the seat 6 with the finger or clothes inserted into the gap, the finger or the clothes are not carelessly pinched in the gap.

On the other hand, in order to fold the folding chair 1 for storage, as shown in FIG. 5, the engagement between the engaging portion 15 and the front frame 4 is released by utilizing the elastic deformation of the engaging portion 15. In order to move the rear leg 5 in a direction in which the lower end of the front leg 3 and the lower end of the rear leg 5 approach each other, a force of a predetermined amount or more is applied in a direction in which the upper end 5a of the rear leg 5 is separated from the predetermined position P. . After the engagement between the engagement portion 15 and the front frame 4 is released in this way, when the lower end of the front leg 3 and the lower end of the rear leg 5 are further approached, as shown in FIG. The rear leg 5 and the seat 6 substantially overlap.

With this structure, the holding member 7 does not need to be specially formed with a hole or modified in order to be attached to the chair 1. It can be attached to a folding chair inside.

The present invention is not limited to the embodiment described above. For example, the holding members 107 and 207
As shown in FIG. 8, the engaging portions 115 and 215 are
14 and 214 may be formed only on one of the left and right ends. In this case, for example, as schematically shown in FIG. The holding member 107 having the mating portion 115 is attached, and the holding member 207 having the engaging portion 215 formed on the left side of the receiving portion 214 is attached to the left rear leg 5.
At 7 and 207, the rear leg 5 is engaged with the rear leg 5 and the right rear leg 5 is engaged with the left side of the receiving portion 214 as schematically shown in FIG. The holding member 207 having the joining portion 215 is attached, and the left rear leg 5 is provided with the receiving portion 11.
A holding member 107 having an engaging portion 115 formed is attached to the right side of the rear member 4, and the rear leg 5 is sandwiched and engaged with the rear leg 5 by both holding members 107 and 207.

Next, another embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG.

In this embodiment, unlike the above-described embodiment, the holding member 307 is configured to be openable and closable, and serves as a covering portion that covers the predetermined position P of the front frame 4 and the upper end 5a of the rear leg 5 in the closed state. A main body 321 extending downward from the lower edge of the main body 321 and engaging with the link member 10 in a closed state;
21 are provided with legs 322 and 323 serving as engaging pieces that prohibit the movement of 21. Since the configuration other than the holding member 307 is the same as that of the above-described embodiment, the same components are denoted by the same reference numerals in the drawings, and description thereof will be omitted.

As shown in FIG. 13, the holding member 307 of this embodiment is made of synthetic resin, has a hole 320 through which the front frame 4 is inserted, opens downward, and halves the hole 320 to the right and left. Hollow half-split body 321 that can be split and opened
And the link member 1 integrally formed below the main body 321.
FIG. 11 includes legs 322 and 323 that are locked to the main body 321 and an engaging portion 324 that is formed integrally with the main body 321 and engages when the main body 321 is closed to hold the closed state. As shown in FIGS. 12 and 13, the chair 101 in use is covered with the predetermined position P and the front frame 4 and the rear leg 5 in the vicinity of the predetermined position P, and the lower side thereof is substantially coincident with the upper surface of the link member 10. Be worn.

As shown in FIG. 13, the main body 321 is composed of a right piece 331 and a left piece 330 that can be opened and closed via a resin hinge 327 formed using the characteristics of a synthetic resin. At the opposite open end, a ridge 32
8 protrudes integrally, and a groove 329 with which the ridge 328 can be engaged when the right piece 331 is closed is formed in the open end of the right piece 331. The right piece 331 has a long oblique side 331a whose right side surface is inclined forward and downward at substantially the same angle as the front frame 4, and a rear leg 5
A short hypotenuse 331b inclined rearward and downward at substantially the same angle as
The base 33 that connects the lower ends of the long oblique side 331a and the short oblique side 331b and inclines rearward and upward at substantially the same angle as the link member 10
1c and a horizontal upper side 331d connecting the upper ends of the long oblique side 331a and the short oblique side 331b. The left piece 330 has a left side surface that is mirror-symmetric with the right piece 331.

The legs 322 and 323 are connected to the left side 3 of the main body 321.
30 and a vertical portion 322a, 323a extending vertically downward from the right piece 331 and elastically deformable inward, and horizontal portions 322b, 323b formed at the lower ends of the vertical portions 322a, 323a and projecting horizontally outward. As shown in FIG. 14, the vertical portions 322a and 323a are arranged such that their outer surfaces can be positioned flush with the inner surface of the link member 10.
It is formed inside the main body 321.

The engaging portion 324 is provided with a concave portion 325 and a convex portion 326 which are engaged when the main body 321 is closed to maintain the closed state.
The concave portion 325 is formed in the vertical portion 323b of the foot 323, and the convex portion 326 is formed in the vertical portion 322 of the foot 322.
b.

In such a configuration, the chair 101 is used, that is, as shown in FIGS. 11 and 12, the lower ends of the front frame 4 and the rear leg 5 are widely opened in the front-rear direction, and the upper end 5a of the rear leg 5 is opened. After supporting the back support rod 8 and holding the seat 6 in a substantially horizontal state with the rear leg 5 and the front frame 4 inclined slightly backward, the holding member 307 is connected to the link member 1.
Attach it by locking it to 0. At this time, the holding member 307
The holding member 307, which can be attached to both the left and right link members 10 and is attached to the right side of the seat 6,
23 is locked to the link member 10, and the holding member 307 attached to the left side of the seat 6 has the foot 322 of the left piece 330 locked to the link member 10.

Therefore, in the use state, the chair 101
To move the link member 10
The legs 322 and 323 of the holding member 307 are locked to
Since the holding member 307 does not move from the position surrounding the upper end 5 a, the state in which the upper end 5 a of the rear leg 5 abuts on the predetermined position P of the front frame 4 is maintained. In other words, the predetermined position P of the front frame 4 is not exposed, and it is possible to prevent the user from unintentionally engaging the predetermined position P where the finger or the like may be pinched. And the probability of occurrence of an unexpected accident can be reduced as much as possible.

In order to release the use state, as shown by an imaginary line in FIG.
The horizontal portions 322b and 323b of the two and 323 are elastically deformed inward, and the engagement between the link member 10 and the legs 322 and 323 is released. After that, the holding member 307 is moved upward so that the contact state between the front frame 4 and the upper end portion 5a of the rear leg 5 can be eliminated, and then the lower end of the front leg 3 and the lower end of the rear leg 5 are brought close to each other. The front frame 4, the rear leg 5, and the seat 6 substantially overlap, and the chair 101 is folded.

With such a configuration, the holding member 307 is attached to the chair 101 so that the chair 10
Since there is no need to drill a hole or perform any other special processing on the folding chair 1, it can be attached to a folding chair currently in use.

The holding member 307 has a left piece 33 thereon.
Foot 322 and foot 323 on each of 0 and right piece 331
Is provided, one type can be used for the right and left mounting positions of the seat 6, and the number of parts can be reduced.

The present invention is not limited to the embodiment described above. For example, when the mode of the link member is different from that of the present embodiment, the foot of the holding member can be locked to the link member. The configuration is not limited to the illustrated embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0037]

According to the present invention, as described in detail above, in use, the rear leg is held at the predetermined position of the front frame by the holding member in the use state. The contact support state of the front frame is not released, and no gap is formed between the upper end of the rear leg and a predetermined position of the front frame. Therefore, it is possible to prevent a finger or clothes from being inadvertently caught in the gap, and it is possible to reduce the probability of occurrence of an unexpected accident as much as possible.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention.

FIG. 2 is a side view showing the same embodiment.

FIG. 3 is a perspective view showing a main part of the embodiment.

FIG. 4 is a sectional view of the main part.

FIG. 5 is an explanatory diagram of an operation of the main part.

FIG. 6 is an operation explanatory view of the embodiment.

FIG. 7 is a side view showing the folded state of the embodiment.

FIG. 8 is a view corresponding to FIG. 3, showing a modification of the embodiment.

FIG. 9 is a schematic diagram showing the modification.

FIG. 10 is a view corresponding to FIG. 9 showing another modification.

FIG. 11 is a perspective view showing another embodiment of the present invention.

FIG. 12 is a right side view showing the embodiment.

FIG. 13 is an exemplary perspective view showing the inside of a state where the holding member of the embodiment is opened.

FIG. 14 is an exemplary sectional view showing an engagement state between a foot of the holding member and the link member according to the embodiment;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 101 ... Chair 2 ... Backrest 3 ... Front leg 4 ... Front frame 5 ... Rear leg 5a ... Upper end part 6 ... Seat 7, 107, 207, 307 ... Holding member 10 ... Link member P ... Predetermined position

Claims (2)

(57) [Claims] 1. A front frame made of a round pipe comprising a front leg extending downward continuously from an upper end having a backrest, and a rear leg whose upper end can abut a predetermined position on a rear surface of the front frame. A seat that is pivotally attached to the rear leg and the front frame, and a link member that connects the front frame and the vicinity of the upper end of the rear leg. The upper end of the rear leg is brought into contact with the predetermined position of the front frame. A holding member that holds the upper end of the rear leg in contact with a predetermined position of the front frame in a use state, wherein the holding member is
Provided at the upper end of the
With an engaging part that applies more than a predetermined force in use.
The engagement part is released from the front frame so that the engagement can be released by
Around the first half of the previous frame
A folding chair characterized by being engaged with a side surface of the folding chair. 2. A front frame comprising a front leg extending downward continuously from an upper end having a backrest, a rear leg whose upper end can abut a predetermined position on a rear surface of the front frame, and the rear leg. And a seat pivotally attached to the front frame, and a link member that connects the front frame and the vicinity of the upper end of the rear leg,
In a chair used with the upper end of the rear leg abutting on the predetermined position of the front frame, a holding member for holding the upper end of the rear leg in contact with the predetermined position of the front frame in use is provided . , The holding member is configured to be openable and closable.
Hold the specified position of the front frame and the upper end of the rear leg
Covering part, extending below the lower edge of the covering part
That engages the link member in a state and prohibits the movement of the covering part
And a lower edge of the holding member in use.
A folding chair which is attached so as to substantially coincide with an upper surface of a member.