JPH09327351A - Chair for learning desk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain a crack of a foot placing plate without incurring a weight increase and an enlargement of the foot plating plate and without impairing external appearance design. SOLUTION: Installing recessed parts 38 running in the longitudinal direction are formed on respective inside surfaces opposed to each other in the lateral direction of leg parts 2, and a wooden foot placing plate 35 is installed over these left and right installing recessed parts 38 in a condition of projecting forward more than the front end of the leg parts 2. Installing members 36 having placing parts 36a to receive lateral directional end parts of the foot placing plate 35 from below, are fitted to and held by the respective both installing recessed parts 38, and a longitudinal directional length of the placing parts 36a is set larger than a longitudinal directional length of the installing recessed parts 38.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention forms a mounting recess along the front-rear direction on each of the inner side surfaces of a leg which are opposed to each other in the left-right direction, and extends over the mounting recess on the left and right to a wooden footrest plate. The present invention relates to a chair for a learning desk, which is attached so as to project forward from the front ends of the legs.

[0002]

2. Description of the Related Art Conventionally, in this type of learning desk chair, the left and right ends of the footrest plate are directly fitted and held in the mounting recesses (see, for example, Japanese Patent Laid-Open No. Hei 7-163438).

[0003]

In this type of learning desk chair, the footrest plate is used not only for placing the foot in the sitting posture, but, for example, the lower leg height is lower than the seat surface height. It is used as a step when school children get on and off, or as a stepping stone when books are taken in and out of a shelf provided on the top plate of a learning desk. Moreover, when it is used as a step or step, it is unlikely that the foot is placed at the front-rear center position of the footrest plate, and in most cases, the foot is placed on the protruding plate portion of the footrest plate that projects forward from the front end of the leg. I have posted it. Therefore, when the weight of the schoolchild is applied to the protruding plate portion of the footrest plate, it corresponds to the front end portion of the mounting recess of the left and right end portions of the footrest plate fitted in the mounting recess of the leg. A large bending moment may act as a shearing force on the part, causing cracking. Especially when putting books in and out of the upper shelf of the study desk, the front end edge of the footrest plate is stretched with the tip of the toe, and the dynamic load is applied along with the putting in and taking out action in that state. , It is easy to cause the foot rest to crack. Therefore, conventionally, as a measure to prevent the footrest plate from cracking, a wooden prismatic reinforcing member along the front-rear direction is attached to the back surface of the footrest plate with an adhesive or a nail. In this case, in order to withstand a large bending moment concentrated on a part of the footrest plate corresponding to the front end of the leg mounting recess, a large number of large reinforcing members are required, and the entire footrest plate is heavy. There is a problem in that the appearance and design are impaired as the size and size increase.

The present invention has been made in view of the above situation, and an object thereof is to devise a mounting structure of a footrest plate with respect to a mounting recess formed in a leg.
Without increasing the weight and size of the footrest plate, and
The purpose of the present invention is to provide a chair for a learning desk that can suppress cracks in the footrest plate without damaging the external design.

[0005]

[Means for Solving the Problems] A feature of a learning desk chair according to claim 1 of the present invention for achieving the above-mentioned object is to provide a front-back direction on each of the inner side surfaces of the leg portion which face each other in the left-right direction. A chair for a learning desk, in which mounting recesses are formed along the left and right mounting recesses, and a wooden footrest plate is mounted so as to project more forward than the front ends of the legs. A mounting member having a mounting portion that receives the left and right ends of the footrest plate from below is fitted and held, and the length of the mounting portion in the front-rear direction is set to the front-rear length of the mounting recess. The point is that it is configured to be larger than that. According to the above characteristic configuration, for example, even when the schoolchild stands on the protruding portion of the footrest plate that protrudes further forward than the front end of the leg, the weight at this time is determined by the length in the front-rear direction of the mounting recess of the leg. Can be dispersedly supported by the mounting portion of the mounting member configured to have a large length in the front-rear direction, and the distance from the front end of the mounting portion to the front end of the footrest plate can be shortened. The bending moment acting on a part of the footrest plate corresponding to the front end of the rest portion is also reduced. Therefore, since the front-back length of the mounting portion of the mounting member that is fitted and held in the mounting recess of the leg portion is only lengthened, it is not necessary to make major modifications to the thickness and shape of the footrest plate itself, Weighting of the mounting board,
It was possible to suppress cracking of the footrest plate without increasing the size and without impairing the appearance design.

According to a second aspect of the present invention, there is provided a characteristic structure of a chair for a learning desk, which is characterized in that, when the mounting member is fitted and held in the mounting recess, the inner surface of the leg portion located below the mounting recess. The point is that a contact portion that contacts the portion is formed. According to the above characteristic configuration, a part of the weight acting on the footrest plate is dispersed and supported also at the contact portion between the contact portion of the mounting member and the inner side surface portion of the leg portion located below the mounting recess. You can Therefore, while suppressing the occurrence of cracks in the footrest plate, the stress acting on the mounting recess of the leg can be reduced and the durability of the leg can be improved.

A characteristic configuration of the chair for a learning desk according to claim 3 of the present invention is that the leg portion, the mounting member, and the footrest plate are fastened together with a screw member. According to the above characteristic configuration, the leg portion, the mounting member, and the footrest plate can be simultaneously fixed with a common screw member. Therefore, even if the footrest plate and the mounting member are individually fixed, they are auxiliary. The simple fixing means is sufficient, and as a result, the mounting structure of the footrest plate can be simplified.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] The chair for a learning desk shown in FIGS.
Guide means A for moving and guiding the seating portion 5 including the seat portion 3 and the backrest portion 4 in the front-rear direction is provided for the leg portion 2 including the footrest portion 1 on the front side, and The seating section 5 is provided with front-back adjusting means B for adjusting the effective depth dimension of the seat section 3 with respect to the backrest section 4. Further, as shown in FIG. 5, FIG. 7, and FIG. 8, between the leg portion 2 and the seat portion 5, the seat portion 5 with respect to the leg portion 2 is provided at a specific position within the movement range (the relevant implementation). In the embodiment, the fixing means C1 which can be fixed at the rear end position) is provided so that the fixing can be released. Also,
As shown in FIGS. 1 and 6, when the seating portion 5 moves forward beyond the intermediate specific position within the front-back movement range, the seating surface 3a of the seating portion 3 is inclined downward to the front in the guide means A. Of the seat surface 3a so that the seat surface 5 becomes a surface and the seat surface 3a of the seat portion 3 becomes horizontal in a state substantially parallel to the floor surface when the seat portion 5 moves rearward beyond the intermediate specific position. Seating surface angle changing means D for changing the angle is provided.

As shown in FIG. 3, the leg portion 2 includes a pair of left and right wooden front legs 6 and a pair of left and right wooden rear legs 7.
A wooden upper frame 8 provided over the upper ends of the front legs 6 and the rear legs 7, and a wooden intermediate frame provided over the vertical middle part between the front legs 6 and the rear legs 7. 9, an upper connecting body 10 made of wood for fixing and connecting intermediate portions of both upper frame bodies 8 in the front-rear direction, and a wooden rod shape for connecting and fixing each of the intermediate frame bodies 9 and both rear leg bodies 7 to each other. Front and rear pair 1
It is composed of 3 and 12.

As shown in FIG. 3, the seating portion 5 includes a pair of left and right mounting frame bodies 14 whose rear end side is formed wider in the vertical direction than the front end side, and front end portions of both mounting frame bodies 14. The seat portion 3 via the front-rear adjusting means B on the upper portion of the mounting portion 16 which is formed in a rectangular shape in plan view and is formed by a pair of front and rear connecting frame bodies 15 that fixedly connect each other and rear end portions to each other.
And a horizontal portion of a pair of L-shaped left and right wooden columns 4b that support a wooden backrest plate 4a that is curved in an arc shape on each of the outer side surfaces of both mounting frame bodies 14 while arranging the wooden seat plates. The backrest portion 4 is composed of a backrest plate 4a and a pair of columns 4b.

As shown in FIGS. 1 to 3 and 11, each of the inner side surfaces of the front legs 6 of the leg portion 2 facing each other in the left-right direction is provided at three positions vertically spaced apart from each other by a predetermined distance. A mounting recess 38 is formed along the front-rear direction, and the footrest portion 1 is fixed with screws along the wooden footrest plate 35 and the left and right ends of the footrest plate 35, respectively. Further, it is composed of a pair of highly rigid mounting members 36 made of polycarbonate (an example of a synthetic resin) fitted and held in each of the mounting recesses 38 facing each other on the left and right. The footrest plate 35 is attached to the left and right mounting recesses 38 facing each other together with the mounting member 36 so as to project further forward than the front ends of the legs 2.

As shown in FIGS. 9 to 11, each of the mounting members 36 has a mounting portion 36a for receiving the left and right ends of the footrest plate 35 from below and a mounting recess 38 for fitting and holding. When this happens, the contact portion 36b that comes into contact with the inner surface portions of the front legs 6 of the leg portion 2 located below the mounting recess 38, and the mounting projection 3 that fits into the mounting recess 38.
7 is integrally formed, and the placing portion 36a is described above.
The length in the front-rear direction is larger than the length in the front-rear direction of the mounting recess 38. The foot rest plate 35 and the mounting member 36 are formed by cutting the screw 28 from the lower surface side of the foot rest plate 35 to a notch hole 36d formed in the mounting portion 36a of the mounting member 36.
It is attached by being screwed and fixed to the footrest plate 35 through. In addition, the mounting projection 3 of the mounting member 36
7 is inserted into the mounting recess 38 from the front side of the leg portion 2, and the front leg body 6 of the leg portion 2 and the mounting member 3 are attached.
6 and the footrest plate 35, a male screw member as a screw member 39 made of metal is inserted from the outer surface of the front leg body 6 into one insertion hole 38a formed in the mounting recess 38 and the receiving member 36. By screwing and fixing to the footrest plate 35 through the hole 36c, the male screw member 39 is also tightened and fixed. Further, as shown in FIG.
8 is formed in an inclined posture inclining forward and downward, and in a state in which the footrest 1 is attached, the footrest surface of the footrest plate 35 is inclined forward about 4 degrees downward from the horizontal. It is configured to have an inclined surface. Therefore,
The mounting recess 38 and the mounting projection 37 of the mounting member 36
And a male screw member 39, and both insertion holes 38a and 36c into which the male screw member 39 is inserted, the footrest portion 1 is selectively fixed to the leg portion 2 at three positions in the vertical direction.
In other words, the footrest height changing means E is configured to change the height dimension between the seat surface 3a of the seatboard 3 and the footrest surface of the footrest plate 35 into three steps.

As shown in FIGS. 1 to 3 and FIG. 9, of the leg portion 2, the lower end portion of the front leg body 6 and the lower end portion of the rear leg body 7 are retracted upward when seated. A pair of left and right wooden auxiliary grounding bodies 41 for height adjustment having a pair of casters 40 are detachably attached. The auxiliary grounding body 4
1, four height adjusting holes 44 are formed at predetermined intervals in the vertical direction, and the height adjusting holes 44 are provided at the lower end of the front leg 6 and the lower end of the rear leg 7 of the leg. A metallic cylindrical female screw member 42 having one screw hole 42a into which a male screw member 43 inserted into one of the holes 44 is screwed is embedded so as to open in both left and right directions. Then, the male screw member 43 is selectively inserted into the plurality of height adjusting holes 44 of the auxiliary grounding body 41, and the tip side of the male screw member 43 is screwed and fixed to the female screw member 42 of the leg portion 2. By doing so, the extension height of the leg portion 2 by the auxiliary grounding body 41, in other words, the seat surface height of the seat surface 3a of the seat plate 3 from the floor surface can be adjusted in four steps. Further, even if the auxiliary grounding body 41 is removed from the leg portion 2, the leg portion 2 is configured so that it can be independently grounded stably.

As shown in FIGS. 3 to 7, the guide means A includes a pair of left and right guide rails 17 made of synthetic resin, which are provided on the leg portion 2 and extend in the front-rear direction, and the both guide rails 17.
Is engaged with the guide groove 18 formed in the front-rear direction,
It is composed of a synthetic resin roller 19 provided in the seat portion 5 in a state of rolling in the front-rear direction along a guide surface 18a composed of the lower surface in each guide groove 18. Specifically, each of the guide rails 17 is fixed to each of the inner surfaces of the upper frames 8 of the leg portion 2 facing each other with screws so as to face each other.
The guide groove 18 of No. 7 is formed in an arcuate groove protruding upward (in the embodiment, the radius of the center line L along the front-back direction of the guide groove 18 is set to 2500 mm).
Also, the guide groove 1 is located at a position about 3/4 from the front end in the front-rear direction.
It is configured to be the top of 8. Further, three rollers 19 that engage with the guide grooves 18 of each of the guide rails 17 are provided along the front-rear direction. These three rollers 19 are rotatably supported by box-shaped roller support members 20 made of synthetic resin, which are attached to the inner surfaces of the attachment frame 14 of the attachment portion 16 which face each other.

Further, as shown in FIG. 6, when the three rollers 19 corresponding to the guide grooves 18 of the respective guide rails 17 are engaged, each of the rotary shaft cores of these three rollers 19 becomes The center line L along the front-back direction of the guide groove 18
The rotary shaft cores of the rollers 19 are arranged so as to be located substantially above.

As shown in FIG. 6, the guide rail 17 is provided.
Each of the front and rear end portions of the guide rail 17 is formed with an opening 18b in which a guide groove 18 of the guide rail 17 is opened forward and backward, and a roller 19 is provided between the leg portion 2 and the seat portion 5. The restriction means 21 is provided for restricting the slip-out of the seat groove 5 from the guide groove 18 and for setting the front-back movement range of the seat portion 5 with respect to the leg portion 2.

As shown in FIGS. 4 to 8, the regulating means 2 is used.
Reference numeral 1 denotes a locking piece 22 integrally formed at the lower end of the roller supporting member 20 and a front portion made of a substantially L-shaped synthetic resin, which is fixed to the center portion in the left-right direction of the upper coupling body 10 of the leg portion 2. Locking body 2
3, a pair of substantially L-shaped rear locking members 24 made of synthetic resin fixed to both left and right sides of the upper connecting member 10, and a rear connecting frame member 15 of the mounting portion 16. ing. Then, when the seating portion 5 is moved and guided by the guide means A and moves forward with respect to the leg portion 2, the lower end portion of the rear side connecting frame body 15 abuts on the front portion locking body 23, and the leg portion When the seating portion 5 is prevented from further moving forward with respect to the portion 2 and the seating portion 5 is moved and guided by the guide means A and moves rearward with respect to the leg portion 2, the respective locking pieces 22. Abuts on the corresponding rear locking body 24, and further rearward movement of the seat 5 relative to the leg 2 is prevented.
That is, the range from the position where the rear side connection frame body 15 abuts the front locking body 23 to the position where the locking piece 22 abuts the rear locking body 24 of the seating portion 5 with respect to the leg portion 2. Front-back movement range, in other words, a seat plate 3 and a backrest plate 4 for the legs 2.
It is set in the front-back movement range integrated with a.

Moreover, by the guide means A thus constructed, the roller 19 rolls along the guide surface 18a of the guide groove 18 of the guide rail 17, and the seating portion 5 moves back and forth with respect to the leg portion 2. The rear end position of the range (Y in FIG. 6A)
Of the three rollers 19 along the front-rear direction, the central roller 19 is located at the top of the guide groove 18, and the seating surface of the seat plate 3 of the seating portion 5 is guided. Three
While a is horizontal in a state of being substantially parallel to the floor surface, the seating portion 5 is moved and guided with respect to the leg portion 2 to a front end position (a position corresponding to Y2 in (b) of FIG. 6) in the front-back movement range. Then, the seating surface 3a of the seat plate 3 of the seating portion 5 becomes a front-down inclined surface which inclines about 4 degrees from the horizontal downward toward the front. That is,
An arc-shaped guide surface 1 along the front-rear direction of the guide rail 17.
8a is configured as the seat surface angle changing means D.

As shown in FIGS. 5, 7, and 8, the fixing means C1 is provided on the upper connecting body 10 of the leg portion 2 on one rear locking body (in this embodiment, the seating posture is left. The engaging hole as the engaged portion 24a formed in the horizontal portion of the rear locking body 24 located at, and one roller support member attached to the seating portion 5 (in the present embodiment, the seating posture is left. Roller support member (20) located at the position of the seat supporting portion (20), is engageable with and disengageable from the engaging hole (24a), and prevents engagement of the seat portion (5) with respect to the leg portion (2) in the front-back direction in the engaged state. The engaging body 25 is composed of an engaging arm made of synthetic resin.

As shown in FIG. 7, the engaging arm 25 is
Among the rotary operation shafts 26 rotatably supported by the one roller support member 20 around the left and right axis, one end portion located inside the roller support member 20 is moved up and down by a rotary operation of the rotary operation shaft 26. Is suspended and supported so as to be movable in the direction, and the lower end portion of the locking arm 25 projects downward from the bottom portion of the roller support member 20,
It is configured to be disengageable with respect to the engagement hole 24a.
The other end of the rotary operation shaft 26 protruding from the one roller support member 20 has a mounting frame body 14 to which the roller support member 20 is mounted, and a backrest portion 4 mounted to the mounting frame body 14. Through the through hole formed over the column 4b of the column 4b, the one hand (left hand in the embodiment) in the sitting posture is led to the outer surface side of the column 4b. Then, at the other end of the rotary operation shaft 26 led out to the outer surface side of the support column 4b of the backrest part 4, an operating tool made of a synthetic resin having a substantially teardrop shape in a side view for operating the engaging arm 25. 27 is detachably attached. That is, the operation tool 27 is provided at a position where it can be operated while seated on the seat plate 3.

Further, a rectangular through hole 25a is formed in the upper end portion of the engaging arm 25, and one end portion of the rotary operation shaft 26 is provided with the rotation operation of the rotary operation shaft 26. Cylindrical protrusion 2 that rotates around its axis of rotation
6a is integrally formed at a portion deviated from the axis of rotation. The engaging arm 25 is suspended and supported by the rotary operation shaft 26 by engaging the projection 26a with the through hole 25a. The rotation angle range of the rotary operation shaft 26 is restricted to a range of about 180 degrees, and the protrusion 26a is located above the rotary shaft center of the rotary operation shaft 26 by the rotation operation of the rotary operation shaft 26. It is configured to pivotally move between an ascending position and a most descending position located below the axis of rotation. Then, the rotation operation shaft 26
When is rotated, the engaging arm 25 is moved in the vertical direction by the crank action that accompanies the rotation of the protrusion 26a. The opening size of the through hole 25a in the width direction is configured to allow the rotation of the protrusion 26a.

The fixing means C1 thus constructed
As shown in FIG. 8, when the operating tool 27 is positioned on the fixed side (the posture in which the sharp side of the operating tool 27 faces rearward as shown in FIG. 8B), the engagement arm 25 is rotated. By moving downward through the shaft 26, the lower end of the engaging arm 25 and the horizontal portion of the rear locking body 24 overlap in the front-rear direction, and the operation tool 27 is released from the fixing side (( ), The engagement arm 25 is lifted upward via the rotary operation shaft 26, and the lower end portion of the engagement arm 25 is moved to the above position. It is set so as to be located above the horizontal portion of the rear locking body 24. Then, with the operation tool 27 positioned on the fixing release side, the attachment member 16 is attached to the leg portion 2.
Is located at the rear end position within the movement range and the operation tool 27 is rotated to the fixed side, the lower end portion of the engagement arm 25 moves downward and engages with the engagement hole 24a of the rear locking body 24. Then, the fixing means C1 is locked and the mounting member 16 is fixed to the leg portion 2. Further, when the operation tool 27 is rotated to the fixing release side from the state where the fixing means C1 is locked, the lower end portion of the engaging arm 25 moves upward and slips out of the engaging hole 24a of the rear locking body 24. , The fixing means C1
Of the mounting member 16 to the leg portion 2 is released.
Is released. Furthermore, the rear end surface of the lower end portion of the engagement arm 25 and the front end surface of the horizontal portion of the rear locking body 24 are
Both are formed on the inclined surfaces 25b and 24b that are directed rearward and upward, and in the state where the operation tool 27 is located on the fixed side, the leg portion 2
On the other hand, even when the mounting member 16 moves from the front end side to the rear end side of the movement range, the rear end surface of the lower end portion of the engagement arm 25 and the front end surface of the horizontal portion of the rear locking body 24 are brought into contact with each other. As a result, the engagement arm 25 rides on the horizontal portion of the rear locking body 24 by the cam action of both the inclined surfaces 25b and 24b,
After that, the lower end portion of the engagement arm 25 falls into the engagement hole 24a of the rear engagement body 24 by its own weight, and the fixing means C1 is locked. Further, when the lower end portion of the engaging arm 25 rides on the horizontal portion of the rear locking body 24, the engaging arm 25 and the projection 26 a of the rotary operation shaft 26.
The relative movement with respect to is permitted by the through hole 25a of the engaging arm 25.

Although not shown, the other roller supporting member 20 can be provided with the locking arm 25 and the rotation operating shaft 26, like the one roller supporting member 20. At the same time, the other mounting frame body 14 to which the other roller supporting member 20 is mounted
And the support column 4b of the backrest portion 4 mounted on the mounting frame body 14, the other end of the rotary operation shaft 26 can be led out to the outer surface side of the support column 4b which the other hand can reach in the sitting posture. A through hole is formed. Then, in a state where the locking arm 25 and the rotation operation shaft 26 are not provided on the other roller support member 20, a cap that closes the through hole is fitted to the outer surface side of the column 4b of the through hole. ing. Therefore, the fixing means C1 may be configured on the side of the other roller supporting member 20 contrary to the embodiment depending on the usability, and in this case, it is formed on the horizontal portion of the other rear locking body 24. The engaged hole 24a is formed in the engaged portion.

By the way, when the seating portion 5 is located at the front end of the front-rear movement range, the three rollers 19 are arranged in the guide groove 18 of the guide rail 17 in a front-down posture along the front-rear direction. However, since the component force of rolling toward the front acts on the roller 19, the seating portion 5 does not freely move rearward with respect to the leg portion 2.

As shown in FIGS. 4 and 5, the front-rear adjusting means B provided on the seating portion 5 has the seat plate 3 at a plurality of positions (four positions in this embodiment) in the front-rear direction with respect to the backrest plate 4a. ), The front-to-back dimension from the front end of the seat portion 3 to the front surface of the backrest plate 4a, which is the effective depth dimension of the seat plate 3, can be adjusted. More specifically, the front-rear adjusting means B embeds a metal tubular female screw member 30 in a state of opening downward in a wooden block piece 29 fixed to the lower surface of the seat plate 3 and extending in the front-rear direction. A metallic guide rail member 31 having a concave cross-section, which is laid across the left and right central portions of both connecting frame bodies 15 of the mounting member 16, is made of metal that can be screwed and fixed to the female screw member 30. A state in which insertion holes 33 for selectively inserting the male screw member 32 are formed so as to penetrate through four places at predetermined intervals in the front-rear direction, and the lower surface side of the block piece 29 is fitted in the concave portion of the guide rail member 31. Then, the block piece 29 is slidably guided in the front-rear direction along the concave portion of the guide rail member 31. Then, the male screw member 32 is selectively inserted through the plurality of insertion holes 33, and the front end side of the male screw member 32 is screwed and fixed to the female screw member 30, whereby the mounting portion 16 is seated. The plate 3 is selectively fixed at four positions in the front-rear direction, and the effective depth dimension of the seat plate 3 can be adjusted in four steps. On the lower surface of the seat plate 3, a pair of left and right L-shaped synthetic resin withdrawal restricting members 34 for restricting upward movement of the seat plate 3 by contact with the guide rail member 31 are screwed. It is fixed.

In the chair for a learning desk of the present invention thus constructed, the seat surface height of the seat surface 3a of the seat plate 3 from the floor surface is set in five levels according to the growth of the height of the school children. (Leg 2
The auxiliary grounding body 41 is attached to the four stages and the auxiliary grounding body 41 is detached from the leg 2 in one stage). 2 is attached with an auxiliary grounding body 41,
By adjusting the seat height of the seat surface 3a of the seat board 3 from the floor surface, the upper and lower body positional relationship of the upper body of the school child seated in the seat portion 5 with respect to the upper surface of the top plate T1 of the learning desk T is adjusted. Is adjusted to have a positional relationship suitable for reading, writing, etc., and further, under the condition that the height of the lower leg of the schoolchild is shorter than the seat height, the foot rest 1 according to the height of the lower leg is adjusted. The optimum footrest height is adjusted by the footrest height adjusting means E, and a stable seated posture is obtained by placing the foot on the footrest surface of the footrest 1 whose footrest height is adjusted. be able to. Therefore, when a school child who is under the above conditions sits on the chair for the learning desk of the present invention arranged on the front side of the learning desk T for the purpose of reading or writing, first, as shown in FIG. In addition, the seat portion 5 is positioned at the rear end position of the front-rear movement range, and the schoolchild is left and right between the front edge of the seat plate 3 of the seat portion 5 and the front edge of the top plate T1 of the learning desk T. The chair for a learning desk of the present invention is arranged in a state in which a front and rear space is secured so that the chair can be transferred from one side in the direction onto the footrest portion 1 of the chair, and the footrest portion 1 is used as a step to sit on the seat portion 5. Then, when reading or writing, as shown in FIG. 2B, the sitting portion 5 is moved by the guide means A to the front end side of the forward and backward movement range by itself, and the upper half of the upper body of the school child is seated. By bringing it closer to the top plate T1 side of the learning desk T together with 5,
The distance between the front edge of the top plate T1 and the upper half of the upper body of the school child in the sitting posture can be adjusted to a distance suitable for reading, writing, etc. in a state where the user sits deep in the seat surface 3a. Moreover, in this state, since the seat surface 3a of the seat plate 3 is a front downward slope, the upper body of the schoolchild is naturally suitable for reading and writing, and
Can be leaned forward with less fatigue. Further, FIG.
As shown in (C), when the seating portion 5 is positioned at the intermediate specific position in the front-back movement range or rearward of the intermediate specific position, the front edge of the top plate T1 and the upper body of the school child in the sitting posture Since the drawer T2 can be pulled out from the learning desk T and the seat surface 3a of the seat plate 3 is horizontal, a sitting posture suitable for taking in and out the drawer T2 and resting can be obtained. In addition, by locking the fixing means C1 in a fixed state in a state where the seat portion 5 is moved to the rear end position of the front-rear movement range, the position of the seat portion 5 with respect to the leg 2 is changed to the rear end position of the front-rear movement range. Can be fixed in position.

After the height of the children grows up and it is no longer necessary to use the foot rest portion 1 and the auxiliary grounding member 41, the leg rest portion 2 and the auxiliary grounding member 41 are removed from the leg portion 2. The chair for a learning desk of the present invention in which the footrest 1 and the auxiliary grounding body 41 are thus removed is in the form of a chair that can be used by adults.

[Second Embodiment] FIG. 12 shows a second embodiment of the chair for a learning desk according to the present invention, in which both front legs 6 of the leg portion 2 are provided.
The mounting member 36 that is fitted and held in the mounting recess 38 formed on the upper portion has a mounting portion 36a that receives the left and right end portions of the footrest plate 35 from below and a left and right end portion of the footrest plate 35. A receiving portion 36e for receiving from above, and a contact portion 36b for contacting the inner side surface portions of both front leg bodies 6 of the leg portion 2 located below the mounting recess 38 when fitted and held in the mounting recess 38, The mounting projection 37 that fits into the mounting recess 38 is integrally formed, and the front-rear length of the mounting portion 36a is longer than the front-rear length of the mounting recess 38. Other configurations are
The configuration is similar to that of the first embodiment.

[Third Embodiment] FIG. 13 shows a third embodiment of the chair for a learning desk according to the present invention, in which both front legs 6 of the leg portion 2 are provided.
Mounting recesses 38 extending in the front-rear direction are formed on the respective inner side surfaces facing each other in the left-right direction, and the footrest portion 1 includes a wooden footrest plate 35 and the left and right footrest plates 35. A pair of highly rigid mounting members 36 made of polycarbonate (an example of a synthetic resin) fixed by screws along each of the end portions in the direction and fitted and held in each of the left and right mounting recesses 38 facing each other. It consists of The footrest plate 35 is attached to the left and right mounting recesses 38 facing each other together with the mounting member 36 so as to project further forward than the front ends of the legs 2.

Each of the mounting members 36 has a footrest plate 35.
36a for receiving the left and right ends of the lower part from below
When the fitting concave portion 38 is fitted and held, the abutting portion 36b which comes into contact with the inner side surface portions of both front leg bodies 6 of the leg portion 2 located on the lower side of the mounting concave portion 38, and the mounting concave portion 38 The fitting projection 37 to be fitted is integrally formed, and the front-rear length of the mounting portion 36a is longer than the front-rear length of the mounting recess 38. In addition, the mounting member 36 has a plurality of positions (three positions in the present embodiment) that are spaced at predetermined intervals along the front-rear direction.
The insertion hole 36c is formed in the
The left and right ends of 5 are formed with screw holes at respective portions corresponding to the insertion holes 36c. Then, the mounting projection 37 of the mounting member 36 is inserted into the mounting recess 38 from the front side of the leg portion 2 and the leg portion 2
The front leg body 6, the mounting member 36, and the footrest plate 35 are formed in the mounting recess 38 with a male screw member as a metal screw member 39 from the outer surface of the front leg body 6 to the outer surface of the front leg body 6. Through the insertion hole 38a and one selected insertion hole 36c among the insertion holes 36c formed in the receiving member 36, the male screw member 39 is jointly held by being screwed and fixed to the screw hole of the footrest plate 35. It is fastened and fixed. Therefore, by selecting which of the plurality of insertion holes 36c the male screw member 39 is inserted into, the leg portion 2
The forward projection size of the footrest plate 35 and the attachment member 36 from the front end of the can be adjusted. Further, the mounting recess 38 is formed in an inclined posture that is inclined forward and downward, and when the footrest 1 is mounted, the footrest plate 3 is attached.
The foot rest surface of No. 5 is configured to be a front-down inclined surface that inclines about 4 degrees forward and downward from the horizontal. Other configurations are the same as those of the first embodiment.

Other Embodiments The material of the mounting member 36 is not limited to polycarbonate, but can be changed as appropriate as long as it is a synthetic resin having high rigidity. Also, mounting member 3
The material of 6 may be a metal such as an aluminum alloy. In each of the above-described embodiments, a chair for a learning desk in which a seat portion 5 including a seat portion 3 and a backrest portion 4 is provided movably in the front-rear direction with respect to a leg portion 2 including a footrest plate 35. However, the present invention is not limited to this configuration,
For example, the structure of the present invention may be adopted in a chair for a learning desk in which the leg portion 2 having the footrest plate 35 is integrally provided with the seat portion 3 and the backrest portion 4.

[0032]

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of a chair for a learning desk according to the present invention.

[Fig. 2] Fig. 2 shows a use state of a chair for a learning desk, (a) is a side view before sitting, (b) is a side view in which the seating portion is positioned at the front end position after sitting, (c) is sitting After that, the side view of the state where the seat part is located at the intermediate specific position

FIG. 3 is an exploded perspective view of a chair for a learning desk.

FIG. 4 is a side sectional view of a connecting portion between a leg portion and a seat portion.

FIG. 5 is a front sectional view of a connecting portion between a leg portion and a seat portion.

FIG. 6 shows a guide means, (a) is a side sectional view in a state where the seating portion is located at a rear end position, and (b) is a side sectional view in which the seating portion is located at a front end position.

FIG. 7 is a front sectional view showing guide means and fixing means.

FIG. 8 shows a fixing means, (a) is a side sectional view in a fixed state, and (b) is a side sectional view in a released state.

FIG. 9 is a front sectional view showing a mounting state of an auxiliary grounding body.

FIG. 10 shows a mounting member for the footrest portion, (a) is a side view of the mounting member on the mounting projection side, and (b) is a plan view of the mounting member.

FIG. 11 is a plan sectional view of a footrest portion.

FIG. 12 is a front sectional view of a mounting member of a second embodiment of the chair for a learning desk of the present invention.

FIG. 13 is a side view of the attachment member of the third embodiment of the chair for a learning desk of the present invention.

[Explanation of symbols]

 2 legs 35 foot plate 36 mounting member 36a mounting part 36b contact part 38 mounting recess 39 screw member (male screw member)

Claims (3)

[Claims] 1. A mounting recess extending along the front-rear direction is formed on each of the inner side surfaces of the leg that are opposed to each other in the left-right direction, and a wooden footrest plate extends from the front end of the leg over the mounting recess on the left and right. Is a chair for a learning desk mounted so as to project forward, and a mounting member having a mounting portion for receiving the left and right end portions of the footrest plate from below is fitted into each of the mounting recesses. A chair for a learning desk, which is configured to be held and configured such that a front-rear length of the mounting portion is larger than a front-rear length of the mounting recess. 2. The mounting member is provided with a contact portion which, when fitted and held in the mounting recess, comes into contact with an inner side surface portion of a leg portion located below the mounting recess. Chair for study desk described in 1. 3. The chair for a learning desk according to claim 1, wherein the leg portion, the mounting member, and the footrest plate are fastened together with a screw member.