JPH09220137A - Structure of attaching footrest of chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with tools such as a spanner and the like which are conventionally used when the height of a footrest is changed, by constructing a plurality of holding parts for selectively holding the footrest at different use heights between a chair and the footrest and by forming a communicating route for communicating the holding parts in the chair or the footrest. SOLUTION: This structure 8 of attaching a footrest of a chair has a plurality of fitting slits 15, 16, and 17 for holding a footrest 7 at different use heights. The footrest 7 can be moved by using either one of the fitting slits 15, 16, and 17 via guide grooves 18 and 19. The footrest 7 held by either one of the slits 15, 16, and 17 is selectively restrained by a movable plate 14. Consequently, the height of the footrest 7 can be easily adjusted without needing a tool or troublesome work.

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 suitable for use as a learning chair or the like.

[0002]

2. Description of the Related Art A learning chair, together with a learning desk or the like attached to it, is usually constructed so that the height of the seat surface can be adjusted according to the growth process of a child.
In particular, many learning chairs of recent years have come to have not only a seating surface but also a footrest attached to the chair, which is provided with such an adjusting function.

[0003]

In the conventional footrest mounting structure, however, a plurality of bolt holes penetrating in the left-right direction in the left and right front legs of the chair are provided at intermittent positions in the vertical direction, and inserts are formed in both left and right end surfaces of the footrest. A nut is embedded, and a bolt inserted into a bolt hole of any step is screwed into the insert nut to selectively attach the footrest at a desired height position between the inner surfaces of the left and right front legs. For this reason, when readjustment of the footrest mounting height is required, it is essential to loosen the bolts using a tool such as a wrench and remove the footrest once, and it takes time and effort to find a tool in a general household. In many cases, no tools can be found on the top, which has the drawback of not being able to respond quickly. In addition, after that, it is necessary to perform the work of tightening the bolt again while holding the loosened footrest at a predetermined position, and even in that work, a high tightening force is applied to prevent the shearing force from acting on the bolt. It may be difficult for children and mothers to work, such as because it is necessary to keep in mind. In these respects, there is room for improvement in the conventional footrest mounting structure.

[0004]

In order to solve the above problems, the present invention provides a plurality of holding portions for holding the footrests in different use postures, and connects the footrests between the holding portions. And the footrest in the holding portion is selectively restrained by the restraining means. Then, when the restraint means is released, the footrest is moved from the current holding portion to another holding portion via the communication path. For this reason,
If each component including the restraint means is incorporated between the chair and the footrest, the restraint means and the footrest can be operated to change the use posture without separately using a tool. Moreover, when changing such a use posture, it is not necessary to completely remove the footrest from the chair, and the restraining means does not require a very high operating force.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A footrest mounting structure for a chair according to the present invention has a plurality of holding portions for selectively holding the footrest in different use postures 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 connecting between the holding portions, and the chair is provided with a restraining means for restraining the footrest in any holding portion at that position. The footrest can be moved from one holding portion to another holding portion via the communication path with the restraint means released.

[0006] In order to make the holding portion simple in construction and capable of exhibiting a good holding state, a pin is projected from one side of the chair or the footrest toward the side, and the footrest is provided on the other side of the chair or the footrest. It is preferable to provide an engaging recess, which is a holding portion, at a position where the pin is engaged when in the use position. In order to make the communication path simple and accurate, it is effective to use a guide groove for connecting the engagement recesses. As a specific embodiment in that case, a pair of pins are provided and these pins are simultaneously engaged with a common guide groove, or a pair of pins are provided, and these pins correspond to each other. A form in which the pair of guide grooves are engaged with each other is provided.

In order to make the restraint means have a simple structure and good operability, the restraint means is constituted by a movable plate which selectively abuts on the footrest which tries to enter the communication path from the holding portion and prohibits the behavior thereof. It is desirable to keep. Also,
As another form of the restraint means, the holding portion is configured so as to hold the footrest in a more stable position by utilizing its own weight than the communication path, and the holding portion plays a role of the restraint means. May be.

In such a structure, when the use posture of the footrest is changed, the restraint means permanently provided on the chair is released, the footrest is transferred to a desired position along the communication path, and then the restraint means is again used. When the footrest is restrained by the, the footrest is stably held in the use posture. Further, in the present invention, the restraint means is permanently installed in the chair, and the above-mentioned work can be performed through the operation of the restraint means and the footrest. Therefore, when changing the posture of the footrest, a separate tool is not required. Not only can the footrest remain attached to the chair through the communication path throughout the work,
The work is easier than the conventional structure which has to be once removed and repositioned. Moreover, since the top load of the footrest is received by the holding portion and the footrest is locked by the restraint means, structurally robust holding portions do not increase the operating force of the restraint means. Therefore, it is possible to reduce the operating force and ensure better operability.

[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 example, as 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 portion 6 is tightened 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 the side surfaces 9a of the footrest body 9, respectively. Each of the first and second pins 10 and 11 has a threaded portion at its tip, and is a dowel-shaped member screwed to the footrest body 9. As shown in FIGS. 2 and 3, the footrest mounting structure 8 is movably supported by a footrest holding plate 12 fixed to the inner side surfaces 3a of the left and right front legs 3 and a rear end surface 3b of the front legs with bolts 13. And a movable plate 14 which is a restraint means.

As shown in FIGS. 2, 3, and 5, the footrest holding plate 12 is, for example, a resin-made plate-like member,
First and second holding portions that hold the first and second pins 10 and 11 projecting from the footrest side surface 9a.
The third engagement recesses 15, 16, 17 and the respective engagement recesses 15,
It is provided with first and second guide grooves 18 and 19 which are connecting paths for connecting and connecting between 16 and 17. The first, second and third engaging recesses 15, 16 and 17 are horizontal recessed grooves, and their extending distance is set to be longer than the distance between the first and second pins 10 and 11. There is. The first guide groove 18 extends in the vertical direction from the first engaging recess base end portion 15a, and the second engaging recess 1
The base end portion 16a of 6 is connected to communicate with the second guide groove 19. The second guide groove 19 includes the second and third engagement recesses 16,
The base end portions 16a and 17a of 17 are connected to each other. Then, these engaging recesses 15, 16 and 17 and each guide groove 1
8 and 19 form an E-shaped groove. Each engaging recess 1
The groove widths of 5, 16, 17 and the guide grooves 18, 19 are first,
It is formed to be slightly larger than the diameter of the second pins 10 and 11. Further, the first and second pins 10 and 11 are configured so as not to be able to be pulled out from the engaging recesses 15, 16 and 17 and the guide grooves 18 and 19 at all times when the footrest 7 is attached. During the adjustment work, the footrest 7 is permanently attached to the chair 1.

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 can be moved to the rear end surfaces 3b of the left and right front legs 3 by bolts 13.
Supported by. That is, the face plate portion 14 of the movable plate 14
A through hole 20 having an L shape or an inverted L shape is provided in a,
The through hole 20 has a first engaging portion 21 and a second engaging portion 22 at both ends. The bolt 13 is a stepped one, and a space margin is formed between the bolt 13 and the movable plate 14 so that the movable plate 14 can be moved when tightened. That is, in the movable plate 14, as shown by the solid line in FIG. 7, in the restrained state P, the bolt 13 is engaged with the first engaging portion 21 of the through hole 20 so that the movable plate side edge 14 b is closer to the inner surface 3 a of the front leg 3. Also, the footrest 7 is stably projected by being inwardly projected and superposed on the rear surface 9b of the footrest, and in the released state Q shown by an imaginary line in the figure, the bolt 13 is engaged with the second engaging portion 22 to move the side edge of the movable plate 14b is configured to retract from the rear surface 9b of the footrest.

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

FIG. 8 shows the footrest 7 with the first engaging recess 1
5 shows a state in which the gear moves from 5 to the second engagement recess 16. When the footrest 7 is moved from the first engagement recess 15 to the second engagement recess 16, the movable plate 14 is placed in the released state Q, and the footrest rear surface 9b is lifted rearward and upward,
The first and second pins 10 and 11 are arranged in this order.
The second pin 11 is slid into the guide groove 18, and the second pin 11 is lifted up to the vicinity of the second engaging recess base end portion 16a with the rear surface 9b of the footrest facing upward. Next, the second and first pins 11 and 10 slide in the second engagement recess 16 in this order, and both pins 10 and 11 simultaneously engage with the second engagement recess 16, The second pin 11 slides until it comes into contact with the tip end portion 16b of the second engagement recess, and the footrest 7 is brought into a horizontal state. Therefore, the movable plate 14 in the released state Q is brought into the restrained state P, and the footrest 7 is stably held in the second engagement recess 16.

FIG. 9 shows the footrest 7 with the second engagement recess 1
6 shows a state in which the shift from 6 to the third engagement recess 17 is made. When moving the footrest 7 from the second engagement recess 16 to the third engagement recess 17, the movable plate 14 is brought into the released 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 slidably moved into the first guide groove 18 in this order. Keep the front 9c of the footrest facing upwards,
The second pin 11 is raised until it reaches the third engagement recess base end portion 17a. The second and first pins 11 and 10 are third in this order.
The second pin 11 slides into the engagement recess 17 and slides until the second pin 11 comes into contact with the tip 17b of the third engagement recess, so that the footrest 7 becomes horizontal. Therefore, the movable plate 14 in the released state Q is brought into the restrained state P, and the footrest 7 is stably held in the third engagement recess 17.

With such a structure, the engaging recesses 15, 16, 17 which are a plurality of holding portions for selectively holding the footrest 7 in different use postures, and the engaging recesses 1 are provided.
Since the footrest holding plate 12 provided with the guide grooves 18 and 19 which are communication paths for connecting and connecting 5, 16, and 17 is fixed to the front inner surface 3a of the front leg of the chair 1, the posture of the footrest 7 is changed. When changing the height, it is possible to easily adjust the height of the footrest 7 without using a tool such as a spanner as in the related art. In addition, during the work, the footrest 7 is constantly in contact with the engagement recesses 15, 16, 17 and the guide grooves 18, 19 respectively.
Since it is still attached to the chair 1 via the, the work is easier than the conventional structure which has to be once removed and repositioned.

Further, any engaging recesses 15, 16, 17
Since the movable plate 14 is permanently installed in the chair 1 as a restraint means for restraining the footrest 7 at the position, the footrest 7 is transferred to the desired position along the guide grooves 18 and 19, and then the movable plate 14 is again moved. When the footrest 7 is brought into the restrained state P by, the footrest 7 is stably held in the use posture. Further, the movable plate 14 is structured so that the restrained state P and the released state Q can be easily switched.
In the restrained state P, the footrest 7 has the engagement recesses 15 and 1
Since the behaviors of entering the guide grooves 18 and 19 from 6 and 17 are selectively brought into contact with the footrest 7 to be prohibited, the structure can be simplified and the operability can be improved. In addition, the top load of the footrest 7 is received by the engaging recesses 15, 16, 17 and
Since the locking of the movable plate 14 is performed by the movable plate 14, even if the engaging recesses 15, 16, 17 are structurally robust, the operating force of the movable plate 14 does not increase. Therefore, it is possible to reduce the operating force and ensure better operability.

Further, the communication route and the restraint means are not limited to the above-mentioned ones, but may be those described below. In the communication path shown in FIG. 10, the guide groove is projected further upward than the uppermost third engaging recess 17 of the above-described embodiment to form the third guide groove 23. The operation in this case will be described. From the first engagement recess 15 to the second engagement recess 16
However, when the footrest 7 moves from the second engaging recess 16 to the third engaging recess 17, the rear surface 9b of the footrest is lifted upward and rearward to move to the first, The second guide groove 19 in the order of the second pins 10 and 11
Slidingly moves the first pin 10 into the third guide groove 23 while keeping the rear surface 9b of the footrest upward and vertically, and the second pin 11 moves the base end of the third engaging recess. Raise until it reaches 17a. Next, the second and first pins 11 and 10
In the order of sliding into the third engaging recess 17 to move the second pin 1
1 slides until it comes into contact with the tip 17b of the third engaging recess, and the footrest 7 is brought into a horizontal state. With such a configuration, compared with the above-described embodiment, the second engagement is performed in exactly the same procedure as when the footrest 7 is moved from the first engagement recess 15 to the second engagement recess 16. Third from recess 16
It is possible to move up to the engagement recess 17.

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

As another form of restraint means, FIG.
As shown in FIG. 7, downward recesses 26b are provided at the front end portions 26a of the engaging recesses 26 of the two guide grooves 24, 25 arranged in parallel, and a more stable position is provided by utilizing the weight of the footrest. There is one that can hold the pin. When using the footrest 7, the downward recess 26b
By fitting the first and second pins 10 and 11 to the footrest 7, the footrest 7 can be restrained. That is, the downward recess 26b also serves as the restraint means. With such a configuration, the restraint means can be made simpler.

In the above embodiment, the case where the engaging recess is provided in the chair and the pin is provided in the footrest has been described, but the engaging recess may be provided in the footrest as the holding portion and the pin may be provided in the chair. Of course. It should be noted that the specific configuration of each unit is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

[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 attaching the footrest to the chair, attaches a plurality of holding portions between the chair and the footrest to selectively hold the footrest in different use postures. Since the connecting path for connecting the respective holding portions is provided, a tool such as a conventional spanner is unnecessary when changing the posture of the footrest. Further, since the footrest remains attached to the chair through the communication path during the work, the work is easier than the conventional structure which has to be removed and repositioned once. Furthermore, since the restraint means for restraining the footrest in an arbitrary holding portion to that position is permanently installed in the chair, the footrest is transferred to a desired position along the connection path, and then the restraint means restrains the footrest again. If so, the footrest is stably held in the use posture. Moreover, since the top load of the footrest is received by the holding portion and the footrest is locked by the restraint means, structurally robust holding portions do not increase the operating force of the restraint means. Therefore, it is possible to reduce the operating force and ensure better operability.

A pin is provided so as to project laterally from one of the chair and the footrest, and the holding portion is an engaging recess that is recessed at a position where the pin is engaged when the footrest is in the use position. Then, it is possible to give a good holding function to the holding portion with a simple configuration. If the communication path is formed as a guide groove that connects between the engagement recesses, a simple and accurate action can be performed when the footrest is moved from one holding portion to another holding portion. .

If the restraint means is a movable plate that selectively abuts against the behavior of the footrest attempting to enter the communication path from the holding portion by inhibiting it from contacting the footrest, the restraint means has a simple structure and good operability. Can be something. Further, as another form of the restraint means, the holding portion is configured so as to hold the footrest in a more stable position by utilizing its own weight than the communication path, and the holding portion plays a role of the restraint means. With such a configuration, the restraint means can have a simpler configuration.

[Brief description of 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 the operation procedure of the footrest of the same 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.

FIG. 12 is a diagram showing a modification of FIG. 11.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Chair 7 ... Footrest 8 ... Footrest mounting structure 10 ... 1st pin 11 ... 2nd pin 14 ... Movable plate (restraining means) 15 ... 1st engagement recess (holding part) 16 ... 2nd engagement Recess (holding part) 17 ... Third engaging recess (holding part) 18 ... First guide groove (contact route) 19 ... Second guide groove (contact route) 23 ... Third guide groove (contact route) 24 ... Guide groove (communication path) 25 ... Guide groove (communication path) 26 ... Engagement recess (holding portion) 26b ... Recess (restriction means)

Claims (7)

[Claims] 1. A mounting structure for a footrest attached to a chair, comprising: a plurality of holding portions formed between the chair and the footrest for selectively holding the footrest in different use postures; And a restraint means for restraining the footrest on any holding portion that is permanently installed in the chair in that position, and the restraint means is released. A footrest mounting structure for a chair, characterized in that it is configured such that it can be moved from one holding portion to another holding portion via a communication path. 2. A member having a pin protruding laterally from one of a chair and a footrest, and a holding portion recessed in the chair or the footrest for engaging the pin when the footrest is in a use position. The footrest mounting structure for a chair according to claim 1, wherein the structure is a recess. 3. The footrest mounting structure for a chair according to claim 2, wherein the communication path is formed of 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 with a common guide groove. 5. A footrest mounting structure for a chair according to claim 3, wherein a pair of pins are provided, and these pins are respectively engaged with a pair of guide grooves provided at corresponding positions. 6. The mounting of a footrest for a chair according to claim 1, wherein the restraint means comprises a movable plate which selectively abuts on the footrest that tries to enter the communication path from the holding portion and prohibits its movement. Construction. 7. The footrest has a holding portion rather than a communication path,
The footrest mounting structure for a chair according to claim 1, wherein the footrest mounting structure is configured so as to be held in a more stable position by utilizing its own weight, and the holding portion also serves as a restraint means.