JP2007202768A - Chair whose seat height is freely adjustable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multifunctional chair excellent in handleability for which the depth (cross length) of a seat surface is freely changed together with the change of a height. <P>SOLUTION: The chair comprises a pair of left and right X-shaped legs, a base, a back plate and a seat plate. The front part upper end of one support leg in the X-shaped legs is attached to the front back surface side of the seat plate and the rear part lower end of the support leg is attached to the lower end side of the right and left columns of the back plate so as to be swung respectively. In the meantime, the front lower end of the other support leg in the X-shaped legs is attached to the front upper surface side of the base and the rear part upper end is attached to a fixed length range on the lower side from the middle height of the right and left columns of the back plate through an appropriate engaging means so as to be freely detachable. The lower end of the right and left columns of the back plate is made changeable by using an appropriate position change means at the rear half part in the length direction of the base. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a universal chair that uses a pair of X-shaped legs, can freely change the height of a seating surface, and can be folded.

Many chairs that use X-shaped legs to adjust their height are shown (see Patent Documents 1 to 7).
However, although the height can be adjusted in any case, the depth (front / rear length) of the seating surface does not change even if the height is changed, so that the purpose of different use of the height cannot be sufficiently satisfied.
JP 09-154661 A No. 04-039725 No. 13-010063 JP 09-037883 Actual Kosho 02-007072 Jinsho Sho 56-097046 Jinsho Sho No.56-155644

  Therefore, the present invention freely changes the depth (longitudinal length) of the seating surface as the height changes, that is, it is used as a table chair or scaffolding work for an infant by hanging it shallowly on a high seating surface, and on a lower seating surface. The purpose is to provide a chair that is multifunctional and easy to use.

  A seat height adjustable chair according to the present invention includes a pair of left and right X-shaped legs, a pedestal, a back plate, and a seat plate, and the pair of X-shaped legs are configured to be rotatable about a crossing axis as well as a seat. One of the support legs in the X-shaped leg is placed on the same pedestal at the width of the board, and the upper end of the front part is directed to the front back side of the seat board, and the lower end of the rear part of the support leg is the back plate. At the lower end of each of the left and right columns, each is pivotably mounted. On the other hand, the lower end of the front part of the other leg of the X-shaped leg is to the front upper surface of the base, and the upper end of the rear is the middle height of the left and right columns of the back plate. It is detachably attached to the fixed length range from the bottom to the lower side through appropriate engagement means, and the back side of the rear half of this seat plate is placed horizontally on a horizontal bar that bridges the upper end of the rear support leg. None, and the right and left struts of the back plate are properly positioned at the rear half of the pedestal in the length direction. Characterized changeably be configured Te.

  The above-mentioned engaging means at the rear upper end of the X-leg support leg is provided with a sliding groove of a certain length range on the opposite inner surface side of the left and right columns of the back plate. A trochanter is attached to the upper end, and the trochanter is engaged with the sliding groove. A protruding metal fitting is attached to the lower end of the support column, and a concave hole that engages with the protruding metal fitting is provided at an appropriate interval of the pedestal.

  The length of the pair of pedestals described above is 450 mm to 600 mm, the width interval is 400 mm to 500 mm, the length of the seat plate is 450 mm to 600 mm, the height of the back plate column is 850 mm to 950 mm, and the seat plate is the first half. The part is wide and the latter part is made narrower, or between the left and right struts of the back plate described above, a range of 1/3 to 2/3 of the height direction is formed in the space part, and the above part is formed in the space part. Makes it possible to move in and out of the rear part of the seat.

  The product of the present invention is configured as described above, and the lower ends of the left and right columns of the back plate are the latter half of the pedestal in the length direction, and in conjunction with the change of position, the pair of left and right X-shaped legs use the cross axis as a fulcrum. The height of the seat plate is changed from high to low or from low to high. Specifically, when the back plate column is moved forward on the base, in the present invention, the X-shaped leg pushes up the seat plate and the height of the seat plate is increased. When the pedestal is moved rearward, the seat plate is lowered contrary to the above. At this time, in the present invention, the seat surface depth of the seat plate (the longitudinal length of the back plate and the seat plate) is automatically changed to be shallow in the former and deep in the latter. Therefore, it is possible to sit down and relax as a scaffolding work on a high seating surface or as a dining chair for an infant or the like, and on a low seating surface with a leg thrown forward. Therefore, since the height position variation of the seat plate in the above is all performed in the upper space of the pedestal (see FIG. 3), even if the seat plate is raised, it is excellent in stability and does not fall down. And extremely safe.

  In the present invention, the engaging means of the left and right support columns of the back plate and the rear support upper end of the X-shaped leg is configured as described in claim 2, and the height of the left and right supporting legs in the X-shaped leg according to the position change of the back plate. The change of the position can be smoothly performed in connection with the sliding movement of the trochanter.

  On the other hand, in the present invention, various means for changing the position between the left and right support columns and the pedestal of the back plate can be adopted. However, the apparatus configured as described in claim 3 is inexpensive to manufacture and easy to operate. It can be done.

  In general use in the present invention, the length of the base is 450 mm to 600 mm, the length of the seat plate is 450 mm to 600 mm, the height of the back plate column is 850 mm to 950 mm, and the seat plate is The first half is wide and the second half is narrow. In addition, between the left and right support columns of the back plate, a range of about 1/3 to 2/3 in the height direction is formed in the space portion, whereby the space portion is rearward of the seat plate. It is possible for the portion to perform a horizontal entry / exit operation without any trouble, and a suitable depth of the seating surface can be obtained smoothly in relation to the height difference.

Embodiments shown in the drawings will be described below.
FIG. 1 is a perspective view of a chair according to the present invention, FIG. 2 is a perspective view of a state in which a seat plate is raised, FIGS. 3A, 3B, and 3C are explanatory views of a state in which the height of a seat surface changes, and FIG. FIG. 5 and FIG. 5 are explanatory views of the folded state.

  The chair 1 according to the present invention is composed of a pair of left and right X-shaped legs 2, a pair of left and right pedestals 3, a back plate 4, and a seat plate 5, and the back plate 4 is left and right at the same width interval as the pair of left and right pedestals. It has a pair of support | pillars 4a and 4a. Here, each of the above members is in general use. The length dimension L1 of the pedestal 3 is 450 mm to 600 mm, the width interval S is 400 mm to 500 mm, the length dimension L2 of the seat plate 5 is 450 mm to 600 mm, and the back plate column 4a. The height dimension h1 is 850 mm to 950 mm.

  Each of the pair of X-legs 2 includes two support legs 2a and 2b, and each of the support legs 2a and 2b is rotatable at a fulcrum portion of the intersecting shaft 2c. Thus, these support legs are erected at a width interval between the pair of bases 3a and 3a, respectively, to support the seat plate 5.

  The support legs 2a, 2a at the rear upper end of the pair of X-shaped legs 2 are bridged by a horizontal bar 2d as seen in FIG. 2, and the front lower ends are connected at the front end positions of the bases 3a, 3a, respectively. The metal fitting 6 is used to swing freely. On the other hand, the front upper end of the other support leg 2b of the X-shaped leg 2 is swingably attached to the front rear surface side of the seat plate 5 via the connecting fitting 7, respectively, while the rear lower end of the support leg 2b is It is attached to the inner surface of the lower end of the supporting columns 4a, 4a opposite to the back plate by using a connecting bracket 8 so as to be swingable.

  The pedestal 5 used in the present invention has a width that is approximately the same as or slightly larger than that between the pair of pedestals 3a and 3a arranged in parallel, and the latter half of the pedestal 5 is opposed to the back plate 4. The support columns 4a and 4a are formed to have a narrow width that can be inserted into the space m, and the entire length L2 thereof is the same as the length dimension L1 of the base 3. Thus, the seat plate 5 is placed on a horizontal bar 2d that bridges between the rear support legs 2a and 2a of the X-shaped leg, and the left and right support columns 4a and 4a of the back plate 4 are mounted on the base 3 as described below. Is displaced in the space m of the back plate 4 in a state where a horizontal seating surface is formed.

  Here, except for the backrest portion 4b, the back plate 4 has a space m formed downward on the opposed inner surfaces of the left and right support columns 4a, 4a, and approximately 1/3 in the height direction. Sliding grooves 9 and 9 are formed in a certain length range from about 2/3 to the lower side. By the way, the trochanters 10 and 10 which are inserted into the sliding grooves 9 and 9 and are slid are attached to the upper ends of the rear support legs 2a and 2a of the X-shaped leg 2 described above. 10 and 10 are respectively guided from the guide grooves 11 and 11 into the slide grooves 9 and 9 and slide in the engaged state in the respective grooves.

  Thus, in the present invention, the left and right support columns 4a and 4a of the back plate 4 are arranged so that their mounting positions can be changed in the approximately second half of the pedestal 3, and various positioning means can be used for this purpose. However, in the illustrated example of the present invention, as a simple manufacturing process, the protruding metal parts 12 and 12 are attached to the lower ends of the columns 4a and 4a, respectively, and the above-described intervals are set at appropriate intervals on the upper surface side of the bases 3a and 3a. A large number of recessed holes 13 that are engaged with the protruding metal fittings 12 and 12 and can be fixed in position are formed.

  3A, 3B, and 3C are side views when the mounting position is changed. When moving to the front of the pedestal 3 as in A, the trochanter 10 faces the sliding groove 9 upward. It slides and lifts the seat plate 3, and reverses when it is moved back like B and C. That is, the crossing angle θ of the X-shaped legs 2 is appropriately changed along with the upward and downward directions, and the height of the seat plate 5 held on the upper surface thereof can be changed at the same time.

  The above is an explanation of the essential components for demonstrating the objective function of the present invention, but as structural accessories and safety reinforcement members, these members are appropriately attached to various places, In the drawings, reference numerals 14 to 18 denote various members for this purpose. It should be noted that the relationship between the sliding groove 9 drilled in a certain length range in the height direction of the left and right support columns 4a and 4a of the back plate 4 and the trochanter 10 attached to the rear upper end supporting leg of the X-shaped leg 2 is as described above. Instead of the coupling means, the rack and gear engaging means, that is, the rack is provided on the column side of the back plate, and on the other hand, the gear engaging with the rack is attached to the support leg of the X-shaped leg. Also good. Further, as a means for changing the position of the back plate column and pedestal, a sliding groove is provided in a certain length range on the upper surface of the pedestal 3a, 3a, and the lower end of each column 4a, 4a. May be performed by providing a trochanter and engaging them. In this case, the position may be fixed by turning a handle screw outside a wedge or hooking, and various other means are also employed.

  4A and 4B are explanatory diagrams of the usage state, in which A is a use state as a table chair for an infant with a raised seat surface, and B is a use state diagram in which an adult is relaxing by lowering the seat surface. As is clear from this figure, in the present invention, regardless of the height difference of the seat plate, the seat plate is located in a state where it does not protrude from the vertical space on the pedestal, so that the load on the seat surface is stabilized. At the same time, it contributes to improved functionality.

  When the position changing means in the above embodiment, that is, when the engagement relationship between the left and right columns of the back plate and the pedestal is released, the present invention can be folded as shown in FIG. It is very convenient when handling.

It is a perspective view of the chair concerning the present invention. It is a perspective view in the state where a seat board was raised. A, B, and C are explanatory diagrams of a state in which the height position of the seating surface changes. It is said use condition figure. It is explanatory drawing in the folded state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chair 2 X-shaped leg 2a, 2b Support leg 3 Seat plate 4 Back plate 4a Support column 5 Base 6 Connection metal fitting 7 Connection metal fitting 8 Connection metal fitting 9 Sliding groove 10 Trochanter 12 Protrusion metal fitting 13 Concave hole

Claims (5)

  It consists of a pair of left and right X-legs, the same pedestal, a back plate, and a seat plate. The pair of X-legs can be pivoted about the axis of intersection, and stands on the same pedestal at the width of the seat plate. One of the support legs in the X-leg swings at the front upper end to the front back side of the seat plate, and the rear lower end of the support leg swings to the lower end side of the left and right columns of the back plate. On the other hand, the lower end of the front part of the other support leg in the above X-shaped leg is to the front upper surface side of the pedestal, and the upper end of the rear part is a certain length range from the middle height to the lower side of the left and right columns of the back plate The back of the rear part of the seat plate is mounted horizontally on a horizontal bar that bridges between the upper ends of the rear support legs. The lower end of the left and right struts can be changed using appropriate position changing means in the latter half of the pedestal in the length direction. I was sitting height adjustable chair.   The above-mentioned engaging means at the rear upper end of the X-leg support leg is provided with a sliding groove of a certain length range on the opposite inner surface side of the left and right columns of the back plate. 2. The seat height adjustable chair according to claim 1, wherein a trochanter is attached to the upper end, and the trochanter is engaged with the sliding groove.   The above-mentioned means for changing the position of the left and right struts and the pedestal of the back plate is provided with a protrusion metal fitting at the lower end of each left and right support pillar of the back plate. The seat height adjustable chair according to claim 1 or 2, wherein the chair is adjustable.   The length of the pair of pedestals described above is 450 mm to 600 mm, the width interval is 400 mm to 500 mm, the length of the seat plate is 450 mm to 600 mm, the height of the back plate column is 850 mm to 950 mm, and the seat plate is the first half. 4. A seat height adjustable chair as claimed in claim 1, wherein the portion is wide and the latter half portion is narrow.   Between the left and right support columns of the back plate described above, a range of 1/3 to 2/3 in the height direction is formed in the space portion, and the entrance / exit operation of the rear portion of the seat plate can be performed in the space portion. The seat height adjustable chair according to claim 1, 2, 3, or 4.

Images