JP2900871B2 - Chair footrest mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair footrest mounting structure suitably used for a learning chair or the like.

[0002]

2. Description of the Related Art In general, a learning chair, together with a learning desk or the like used with the learning chair, is configured so that the height of a seat surface can be adjusted according to the growth process of a child.
In particular, recently, many learning chairs have been provided with such an adjustment function not only on the seat surface but also on a footrest attached to the chair.

[0003]

However, in the conventional footrest mounting structure, the left and right front legs of the chair are provided with a plurality of bolt holes penetrating in the left and right direction at intermittent positions in the vertical direction, and are inserted into the left and right end surfaces of the footrest. A footrest is selectively mounted at a desired height between the inner surfaces of the left and right front legs by screwing a bolt inserted through a bolt hole in any one of the steps into the insert nut. For this reason, when it is necessary to readjust the mounting height of the footrest, it is indispensable to loosen the bolt using a tool such as a wrench and temporarily remove the footrest. There are many cases where a tool cannot be found on the upper part, and there is a drawback that quick response cannot be performed. After that, it is necessary to re-tighten the bolts while holding the released footrest in place, and apply a relatively high tightening force to the bolts in order to prevent shearing force from acting on the bolts. The work may be difficult for children and mothers, such as the need to keep them, and there is still room for improvement in the conventional footrest mounting structure in these respects.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a plurality of holding portions for holding a footrest in different use postures, and connects a footrest between each holding portion by a communication path. And the footrest in the holding portion is selectively restrained by restraining means. Then, when the restraining means is released, the footrest is shifted from the current holding section to another holding section via the communication path. For this reason,
If each component including the restraining means is incorporated between the chair and the footrest, the use posture can be changed by operating the restraining means and the footrest without using a separate tool. In addition, it is not necessary to completely remove the footrest from the chair when performing such a change of the use posture, and there is no need to require a very high operating force for the restraining means.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The chair footrest mounting structure according to the present invention comprises a plurality of holding portions for selectively holding the footrest in different use positions between the chair and the footrest when the footrest is attached to the chair. The chair or the footrest is provided with a communication path for communicating between the holding portions, and a restraint means for restraining the footrest in an arbitrary holding portion at that position is permanently provided on the chair. This restraint
The step is a foot that attempts to enter the connection path from each holding part.
A movable plate that abuts the rest and inhibits its behavior
Operability with simple configuration
doing. Then, the footrest can be shifted from one holding portion to another holding portion via a communication path in a state where the restraining means is released.

[0006] In order to make the holding portion simple and capable of exhibiting a good holding state, a pin is protruded from one of the chair or the footrest to the side, and the footrest is attached to the other of the chair or the footrest. It is preferable that an engagement recess, which is a holding portion, is provided at a position where the pin is engaged when in the use position. In order to achieve a simple and accurate operation of the communication path, it is effective to provide a guide groove connecting between the engagement recesses. As a specific embodiment at that time, a pair of pins are provided, and these pins are simultaneously engaged in a common guide groove, or a pair of pins are provided, and these pins correspond to each other. And a pair of guide grooves provided at respective positions.

In such a configuration, the footrest
When changing the usage posture, use a permanent
Desired footrest along the connection path after releasing the steps
To the position of
If the strike is restrained, the footrest will
Is held stably.

According to the present invention, the restraining means is provided permanently on the chair.
Through this restraint and footrest operation
You can do the work described above, so the posture of the footrest
Can be changed without the need for a separate tool.
Not only can the footrest be contacted throughout the work,
Because it remains attached to the chair via the street,
Compared to the conventional structure that has to be repositioned
Work is also easy. Besides, the footrest
The overload is received by the holding part and the footrest lock
The holding is carried out by restraining means,
Even if it is strong, the operating force of the restraint means does not increase.
For this reason, the operating force is reduced to ensure better operability.
Can be kept.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The chair 1 shown in FIG. 1 is used for, for example, a learning chair or the like, and has a backrest 5 and a height-adjustable chair on front and rear legs 3 and 4 integrally fixed to two upper and lower horizontal members 2. The seat 6 is fastened with bolts, and a footrest 7 is attached between the inner surfaces of the left and right front legs 3 by a footrest mounting structure 8.

As shown in FIGS. 1 to 4, the footrest 7 has a pair of first and second pins 10 and 11 projecting laterally from both side surfaces 9a of the footrest body 9. The first and second pins 10 and 11 each have a threaded portion at the tip and are dowel-shaped and screwed to the footrest body 9. 2 and 3, the footrest mounting structure 8 is supported by a bolt 13 so as to be movable on a footrest holding plate 12 fixed to the inner surface 3a of the left and right front legs 3 and a rear end surface 3b of the front legs. And a movable plate 14 serving as a restraining means.

As shown in FIGS. 2, 3 and 5, the footrest holding plate 12 is, for example, a resin plate.
First, second, and a plurality of holding portions that hold the first and second pins 10 and 11 projecting from the footrest side surface 9a.
Third engagement recesses 15, 16, 17 and each engagement recess 15,
It has first and second guide grooves 18 and 19 which are communication paths for connecting and connecting between 16 and 17. The first, second, and third engagement recesses 15, 16, 17 are horizontal grooves, and the extending distance thereof is provided to be longer than the separation distance between the first and second pins 10, 11. I have. The first guide groove 18 extends in the vertical direction from the first engagement recess base end portion 15a, and the second engagement recess 1
6 is connected to the second guide groove 19. The second guide groove 19 includes the second and third engagement recesses 16,
17 are connected between the base ends 16a and 17a. And these engagement recesses 15, 16, 17 and each guide groove 1
8 and 19 form an E-shaped concave groove. Each engagement recess 1
The groove width of 5, 16, 17 and each guide groove 18, 19 is the first,
The second pins 10 and 11 are formed slightly larger in diameter. In addition, the first and second pins 10 and 11 are configured such that they cannot be pulled out of the engagement recesses 15, 16 and 17 and the guide grooves 18 and 19 at all times when the footrest 7 is attached. The footrest 7 is always provided on the chair 1 during the adjustment work.

As shown in FIGS. 3 and 6, the movable plate 14 is made of resin and has a plate-like movable L-shape. The movable plate 14 is provided with bolts 13 so as to be movable to the rear end surfaces 3b of the left and right front legs 3.
Supported by. That is, the face plate portion 14 of the movable plate 14
a is provided with an L-shaped or inverted L-shaped through hole 20;
The through hole 20 has a first engagement portion 21 and a second engagement portion 22 at both ends. The bolt 13 is stepped, and has a space between the bolt 13 and the movable plate 14 when the bolt 13 is tightened, such that the movable plate 14 can be moved. That is, as shown by the solid line in FIG. 7, the movable plate 14 engages the bolt 13 with the first engaging portion 21 of the through hole 20 in the restrained state P, and the movable plate side edge 14 b is moved from the inner surface 3 a of the front leg 3. Also, it projects inward and overlaps with the rear surface 9b of the footrest to stably hold the footrest 7, and in the released state Q shown by the imaginary line in FIG. 14b is configured to retract from the footrest rear surface 9b.

Next, the operation of this embodiment will be described. 7 shows a state where the movable plate 14 is in the restrained state P and the footrest 7 is stably held in the use posture, and an imaginary line part shows a state where the movable plate 14 is in the released state Q. I have. When the movable plate 14 is in the restrained state P, the bolt 13 is engaged with the first engagement portion 21 of the through hole 20 provided in the movable plate face plate portion 14a. The movable plate side edge 14b overlaps with the rear surface 9b of the footrest to hold the footrest 7 immovably. When the movable plate 14 is in the release state Q, the movable plate 14 is moved outward and upward, and the bolt 13 is moved from the first engagement portion 21 to the second engagement portion 2.
2 and engage. As a result, the movable plate 14 is retracted from the rear surface 9b of the footrest and does not overlap, so that the footrest 7 can be shifted to another engagement recess.

FIG. 8 shows that the footrest 7 is connected to the first engagement recess 1.
5 shows a state where the transition from 5 to the second engagement recess 16 is made. When shifting the footrest 7 from the first engagement recess 15 to the second engagement recess 16, the movable plate 14 is set to the release state Q, and the footrest rear surface 9 b is lifted rearward and upward.
In the order of the second pins 10, 11, both pins 10, 11
The second pin 11 is slid into the guide groove 18, and the second pin 11 is raised to the vicinity of the second engagement recess base end 16a while the rear surface 9b of the footrest is in the upward vertical state. Next, the second and first pins 11 and 10 are slid in the second engagement recess 16 in this order, and both pins 10 and 11 are simultaneously engaged with the second engagement recess 16, The second pin 11 slides until it abuts the second engagement recess tip portion 16b, and the footrest 7 is set in a horizontal state. Therefore, the movable plate 14 that has been in the released state Q is set to the restrained state P, and the footrest 7 is stably held in the second engagement recess 16.

FIG. 9 shows the footrest 7 in the second engagement recess 1.
6 shows a state where the state has shifted from 6 to the third engagement recess 17. When the footrest 7 is shifted from the second engagement recess 16 to the third engagement recess 17, the movable plate 14 is set to the release state Q, and the footrest rear surface 9b held in the second engagement recess 16 is moved rearward and downward. The first and second pins 10 and 11 are slid and moved into the first guide groove 18 in the order of the first and second pins 10 and 11. With the front surface 9c of the footrest facing upward,
The second pin 11 is raised until it reaches the third engagement recess base end 17a. In the order of the second and first pins 11 and 10, the third
The second pin 11 slides into the engagement recess 17 and slides until the second pin 11 comes into contact with the tip end 17b of the third engagement recess, thereby bringing the footrest 7 into a horizontal state. Therefore, the movable plate 14 that has been in the released state Q is set to the restrained state P, and the footrest 7 is stably held in the third engagement recess 17.

With such a configuration, the engagement recesses 15, 16, 17 which are a plurality of holding portions for selectively holding the footrest 7 in different use postures, and each engagement recess 1
Since the footrest holding plate 12 having the guide grooves 18 and 19, which are communication paths for connecting and connecting between 5, 16, and 17, is fixed to the inner surface 3a of the front leg of the chair 1, the posture of the footrest 7 can be changed. When changing, the height of the footrest 7 can be easily adjusted without the need for a conventional tool such as a spanner. Also, during the operation, the footrest 7 is always engaged with each of the engagement recesses 15, 16, 17 and each of the guide grooves 18, 19.
, The work is easier than in the conventional structure, which must be once removed and repositioned.

Further, optional engagement recesses 15, 16, 17
Since the movable plate 14 is permanently installed on the chair 1 as a restraining means for restraining the footrest 7 at the position, the footrest 7 is transferred to a desired position along the guide grooves 18 and 19, and then is moved again. When the footrest 7 is brought into the restraining state P, the footrest 7 is stably held in the use posture. Further, the movable plate 14 has a structure that can easily be switched between the restrained state P and the released state Q,
In the restrained state P, the footrest 7 is
Since the behavior of approaching the guide grooves 18 and 19 from 6 and 17 is selectively abutted on the footrest 7 and prohibited, the structure can be simplified and the operability can be improved. In addition, the load on the footrest 7 is received by each of the engagement recesses 15, 16, and 17, and
Is locked by the movable plate 14, so that even if the engaging recesses 15, 16, 17 are structurally robust, the operating force of the movable plate 14 does not increase. For this reason, the operation force can be reduced to ensure better operability.

The connection route and the restraining means are not limited to those described above, but may be as described below. In the communication path shown in FIG. 10, the guide groove protrudes further upward than the uppermost third engagement recess 17 of the above-described embodiment to form a third guide groove 23. The operation in this case will be described. The first engagement recess 15 moves from the second engagement recess 16
The transition to is similar to that of the above embodiment, but when the footrest 7 moves from the second engagement recess 16 to the third engagement recess 17, the footrest rear surface 9 b is lifted rearward and upward, and The second guide grooves 19 are arranged in the order of the second pins 10 and 11.
The first pin 10 is slid and moved in the third guide groove 23 while the rear surface 9b of the footrest is kept vertically upward, and the second pin 11 is moved to the third engagement recess base end. Raise to 17a. Next, the second and first pins 11, 10
Slidably into the third engagement recess 17 in the order of
The footrest 7 is slid so that the footrest 7 comes into contact with the third engagement recess tip 17b, thereby bringing the footrest 7 into a horizontal state. With such a configuration, as compared with the above-described embodiment, the second engaging member is moved in exactly the same procedure as when the footrest 7 is shifted from the first engaging recess 15 to the second engaging recess 16. Third from concavity 16
It is possible to shift to the engagement recess 17.

Next, the communication path shown in FIG. 11 is composed of two guide grooves 24, 2 connecting the plurality of engagement recesses 26 in communication.
5 are arranged in parallel, and a pair of first and second pins 1 are provided.
A pair of guide grooves 2 provided at positions corresponding to 0 and 11 respectively.
4 and 25 respectively. With such a configuration, when the footrest 7 is shifted from one engagement recess to another engagement recess, the footrest 7
It is possible to shift while keeping the horizontal state.

In the above embodiment, the engaging recess is provided in the chair,
The case where the pin is provided on the
An engaging recess is provided in the footrest as a holding part, and a pin is provided in the chair.
Needless to say, it can be opened.

The specific configuration of each part is as described above.
The present invention is not limited to only the examples, but
Various modifications are possible without departing from the scope.

[0022]

The present invention is embodied in the above-described embodiment, and has the following effects. The footrest mounting structure of the chair according to the present invention, when the footrest is attached to the chair and attached, the plurality of holding portions for selectively holding the footrest in different use postures between the chair and the footrest, the chair or the footrest. Since a communication path is provided to communicate between the holding portions, a tool such as a conventional wrench is not required when changing the posture of the footrest. Also, during the operation, the footrest remains attached to the chair via the communication path from time to time, so that the operation becomes easier as compared with the conventional structure in which the footrest has to be once removed and repositioned. Further, a footrest in any of the holding portion, and restrained in its position holding
Footrest trying to enter the connection route from
Since a restraining means consisting of a movable plate that selectively abuts and prohibits its behavior is permanently installed in the chair, the footrest is transferred to a desired position along the communication path, and then the footrest is again restrained by the restraining means. This will simplify the restraint
That it can be made easy to operate with a simple configuration
In addition, the footrest is stably held in the use posture. In addition, the load on the footrest is received by the holding portion, and the locking of the footrest is performed by the restraining means. Therefore, even if the holding portion is structurally robust, the operating force of the restraining means does not increase. For this reason, the operation force can be reduced to ensure better operability.

A pin protrudes from one side of the chair or the footrest, and the holding portion is an engagement recess formed at a position where the pin is engaged when the footrest is in the use position. Then, it is possible to provide a good holding function to the holding section with a simple configuration. If the communication path is formed as a guide groove connecting between the engagement recesses, a simple and accurate operation can be performed when the footrest is shifted from one holding portion to another holding portion. .

[0024]

[Brief description of the drawings]

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

FIG. 2 is a partial perspective view showing a main part of the embodiment.

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

FIG. 4 is a diagram showing a main part of the embodiment.

FIG. 5 is a diagram showing a main part of the embodiment.

FIG. 6 is a diagram showing a main part of the embodiment.

FIG. 7 is an operation explanatory view showing an operation procedure of the movable plate of the embodiment.

FIG. 8 is an operation explanatory view showing an operation procedure of the footrest of the embodiment.

FIG. 9 is an operation explanatory view showing an operation procedure of the footrest of the embodiment.

FIG. 10 is an operation explanatory view corresponding to FIG. 9 showing another embodiment of the present invention.

FIG. 11 is a diagram showing still another embodiment of the present invention.

[Description of Signs] 1 ... Chair 7 ... Footrest 8 ... Footrest mounting structure 10 ... First pin 11 ... Second pin 14 ... Movable plate (restraining means) 15 ... First engagement recess (holding portion) 16 ... Second engagement recess (holding portion) 17 ... Third engagement recess (holding portion) 18 ... First guide groove (communication route) 19 ... Second guide groove (communication route) 23 ... Third guide groove ( (Contact path) 24: guide groove (connection path) 25: guide groove (connection path) 26: engaging recess (holding portion) 26b: recess (restraining means)

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A47C 7/50 A47C 7/52

Claims (5)

(57) [Claims] 1. A mounting structure for a footrest attached to a chair, comprising: a plurality of holding portions configured between the chair and the footrest to selectively hold the footrest in different use postures; and provided on the chair or the footrest. And the contact path that connects between the holding sections and the footrest that is permanently installed in the chair and is in contact with the footrest that attempts to enter the communication path from the holding section by restraining the footrest in any holding section at that position Restraining means comprising a movable plate for inhibiting the movement of the footrest from the one holding part to the other holding part in a state where the restraining means is released. A footrest mounting structure for a chair. 2. A pin is protruded from one side of a chair or a footrest toward a side, and a holding portion is recessed in the chair or the footrest to engage the pin when the footrest is in a use position. 2. The chair footrest mounting structure according to claim 1, wherein the chair is a recess. 3. The footrest mounting structure for a chair according to claim 2, wherein the communication path comprises a guide groove connecting between the engagement recesses. 4. A footrest mounting structure for a chair according to claim 3, wherein a pair of pins are provided, and these pins are simultaneously engaged in a common guide groove. 5. A footrest mounting structure for a chair according to claim 3, wherein a pair of pins are provided, and said pins are respectively engaged with a pair of guide grooves provided at corresponding positions.