JPH0453707Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an extendable support column suitable for use in movable furniture such as chairs.

[Prior Art] As this type of support, a telescopic type has been developed in which an inner pillar member and an outer pillar member are vertically slidably combined with an inner pillar member that is erected on a base portion. However,
In a conventional support column of this type, both the inner column member and the outer column member are pipe-shaped.

[Problems to be solved by the invention] Unlike fixed furniture such as desks and chests of drawers, movable furniture such as chairs is frequently moved and used, so it is extremely important that the furniture be lightweight. However, since the telescoping column requires the use of an inner column member and an outer column member made of metal, there is a problem in that the weight of these parts increases.

Therefore, it is conceivable to make the inner column member held by the outer column member into a channel-shaped one, which can be constructed with less material than a pipe, in order to reduce the weight. However, simply making the inner column member into a channel-shaped one causes a major problem in terms of strength. That is, when a torsional force acts on the channel-shaped inner column member a, as shown by the imaginary line in Figure 6, the opening edges b of the inner column member a are displaced in the longitudinal direction, causing the inner column member a to be significantly twisted. Therefore, when such a support is used, the rigidity of the entire furniture is impaired, which is a problem.

The present invention was developed to solve the above-mentioned problems, and it makes it possible to reduce the weight of the column without impairing the rigidity of the entire column, and thereby prevent the appearance of the column as a whole from being impaired. The purpose is to provide supports for movable furniture such as chairs.

[Means for solving the problem] In order to achieve the above purpose, the present invention
The following configuration is adopted.

That is, the support according to the present invention is for movable furniture such as a chair, which is formed by combining an inner pillar member and a pipe-shaped outer pillar member so as to be able to slide up and down, and in which the inner pillar member is connected to one side wall. a channel-shaped member body having an opening, a connecting plate rigidly attached to the upper end of the member body and connecting the opening edges, and a connecting plate rigidly attached to the inner periphery of the lower end of the member body. a lid plate that connects the opening edges of the member body; a notch formed in the lid plate for releasing the tip edges of both opening edges of the member body from the lid plate; and an inner surface of the tip edges on both side edges. It has an inner engaging part that contacts the side and an outer engaging part that contacts the outer surface, and the inner engaging part and the outer engaging part sandwich each tip edge to attach the lid to the opening of the member body. The present invention is characterized in that the cover plate is attached to the upper surface of the base part and the lower end of the blind plate is locked by the upper surface of the base part.

[Function] According to such a configuration, the inner column member can be constructed using less material than a pipe-shaped member. Therefore, weight reduction is possible.

Further, the upper ends of the opening edges of the inner pillar members are connected by a connecting plate, and the lower ends of the opening edges are connected by a cover plate rigidly attached to the inner periphery of the lower end of the inner pillar member. , the edges of the openings are unlikely to shift in the longitudinal direction. Therefore, even if a torsional force is applied, it will not be significantly deformed.

Further, the blind plate is attached to the opening with the inner engaging part and the outer engaging part engaged with the tip edges of both opening edges of the member main body from the inside and the outside, respectively, and the cover plate is Since a notch is provided on the inner periphery of the lower end of the inner column member to release the tip edge of the opening edge, the lower end of the blind plate can be hung down to a position covering the front surface of the cover plate. The inner engaging portion of the blind plate is housed in the notch, so that the blind plate and the cover plate do not interfere with each other. Therefore, the lower end side of the opening of the inner column member, which is particularly easily visible, can be completely hidden. Furthermore, by attaching the lid plate to the top surface of the base, the inner pillar member is supported by the base, and at the same time, the lower end of the blind plate is locked by the top surface of the base to prevent it from being pulled out from the opening. Therefore, the connecting portion between the inner column member and the base portion can be completely hidden, and a fastening device for fixing the blinding plate can also be made unnecessary.

[Example] Hereinafter, an example in which the present invention is applied to the support of a chair, which is movable furniture, will be described with reference to FIGS. 1 to 5.

As shown in FIG. 1, this chair has a support 3 erected on the base 2 of a leg 1, a seat 4 supported at the upper end of the support 3, and crossbars 5 attached to both sides of the seat 4. A backrest 6 is provided between the upper ends of these crossbars 5.

The leg 1 has a pair of columns 3 erected on both sides of the upper surface of a base portion 2, and the column 3 is formed by combining an inner column member 7 and an outer column member 8 so as to be vertically slidable.

As shown in FIGS. 4 and 5, the inner column member 7 includes a channel-shaped member body 71 having a continuous opening 71b in one side wall 71a, and is rigidly attached to the upper end of this member body 71. It includes a connecting plate 72 that connects the opening edges 71c of the member main body 71, and a cover plate 73 that is rigidly attached to the inner periphery of the lower end of the member 71. The connecting plate 72 is a rectangular metal plate, and is welded to the opening edge 71 of the member main body 71.
It is rigidly attached to the inner surface of c. The central part of this connecting plate 72 and the member main body 71 opposite thereto
Nut holding holes 74 and 75 are formed in the other side wall 71d, respectively. On the other hand, the cover plate 73 is a flat plate that fits on the inner periphery of the inner column member 7, and is rigidly attached to the inner column member 7 by welding. A bolt 76 is fixedly fixed to the cover plate 73 through the cover plate 73, and a notch 73a is formed for releasing the tip edges 71d of both opening edges 71c of the member main body 71 from the cover plate 73. Then, as shown in FIG. 3, this bolt 76 is inserted into the bolt hole 77 of the base part 2, and a nut 78 is fixed to the insertion end from the lower surface side of the base part 2. The pillar member 7 can be attached to the base part 2. Further, a blind plate 79 is attached to the opening 71b of the inner column member 7. Blindfold board 79
As shown in FIG. 5, a face plate portion 79a that covers substantially the entire area of the opening 71b of the inner column member 7;
It consists of an inner engaging part 79b that is provided on both side edges of the face plate part 79a and contacts the inner surface side of the tip edge 71d, and an outer engaging part 79c that contacts the outer surface side, and is integrally molded from synthetic resin. There is.
Then, the blind plate 79 is attached to the opening 71b of the member main body 71 with each tip edge 71d being sandwiched between the inner engaging portion 79b and the outer engaging portion 79c. The installation work can be done by pushing in the surface direction using the elastic deformation of the blind plate 79, or by inserting it along the longitudinal direction from the lower end side of the opening 71b before attaching it to the base part 2. It can be done easily. In addition, after installation, the first
As shown in the drawings and FIG. 3, the lower end 79d of the blind plate 79 is in contact with and latched to the upper surface 2a of the base portion 2.

The outer column member 72 is pipe-shaped and is slidably mounted on the outside of the inner column member 7 via a synthetic resin bushing 72e. Then, while fixing the seat bracket 81 to the upper end of the outer column member 8,
A horizontal member 82 is installed between the upper ends of both outer pillar members 8.

A lift position adjustment mechanism 9 for changing the vertical relative positions of the inner column member 7 and the outer column member 8 is built into the column 3 constructed as described above, and inside the horizontal member 82. A transmission mechanism 10 is housed therein, which transmits the rotational operating force applied to the operating handle 11 to the elevating position adjustment mechanism 9 to move the seat 4 up and down.

As shown in FIG. 3, the elevating position adjustment mechanism 9 is
It comprises a nut 91 held in the nut holding holes 74, 75 of the inner column member 7, and a threaded shaft 92 screwed into the nut 91. A small diameter shaft portion 92a provided at the upper end of this screw shaft 92 projects into the horizontal member 82, and the operating force applied to the operating handle 11 is transmitted to the screw shaft 92 through the transmission mechanism 10. The transmission is made to the small diameter shaft portion 92b of the.

As shown in FIG. 3, the transmission mechanism 10 includes a driven crank 101 fixed to the small diameter shaft portion 92b of the screw shaft 92, and a rotating shaft 11 of the operating handle 11.
1, and the rotational force of this driving crank 102 is transferred to the driven crank 10.
1 and a crank lever 103 for transmitting power to the engine.

With such a configuration, when the operating handle 11 provided at the center of the lower surface of the horizontal member 82 is rotated, the rotational operating force is transferred from the driving crank 102 to the left and right driven cranks 101 via the crank lever 103. Transmitted, both left and right lifting position adjustment mechanism 9
The respective screw shafts 92 of are rotated synchronously. As a result, both the screw shafts 92 support the outer column member 8 and move forward and backward into the nut 91 held by the inner column member 7 in the vertical direction, and both the left and right columns 3 expand and contract at the same time. The seat 4 will move up and down.

Since the inner column member 7 of the column 3 is shaped like a channel, it can be constructed using less material than a pipe-shaped column. Therefore, the weight can be reduced, and the usability of the chair, which is frequently moved and used, can be effectively improved. Further, the upper ends of the opening edge 71c of the inner column member 7 are connected by a connecting plate 72, and
Since the lower ends of the opening edges 71c are connected by the lid plate 73, the opening edges 71c are unlikely to shift from each other in the longitudinal direction. Therefore, even if a torsional force is applied, the inner column member 7 will not be significantly deformed. Therefore, even though the inner column member 7 has a channel shape, the rigidity of the column 3 can be maintained at a high value. Moreover, if the inner column member 7 is made into a channel shape, the interior can be more reliably treated to prevent rust.

Further, the blind plate 79 is mounted on the member main body 71 with the tip edges 71d of both opening edges 71c of the member main body 71 sandwiched between the inner engaging part 79b and the outer engaging part 79c. The opening 71b is sealed with a lid, and the lid plate 73 is provided on the inner periphery of the lower end of the inner column member 7 and forms a notch 73a for releasing the tip edge 71d of the opening edge 71c from the lid plate 73. Therefore, even if the lower end 79d of the blind plate 79 is placed so as to hang down to a position covering the front surface of the cover plate 73, the inner engaging portion 79b of the blind plate 79 will not be accommodated in the notch 73a. Then, the blind plate 79 and the cover plate 73
will not interfere. Therefore, the lower end side of the opening 71b of the inner column member 7, which is particularly easy to see, can be completely hidden. Moreover, by attaching the cover plate 73 to the upper surface 2a of the base part 2, the inner column member 7 is supported by the base part 2, and at the same time, the blind plate 7
Since the lower end 79d of the inner column member 9 is locked with the upper surface 2a of the base portion 2 to prevent it from coming out from the opening 71b, the connecting portion between the inner column member 7 and the base portion 2 can be completely hidden. It is also possible to eliminate the need for a fastener for fixing the blind plate 79. Therefore, the structure can be simplified compared to a structure that requires a cylindrical cover or the like.

Note that the support according to the present invention is not limited to those for chairs, and can be applied to various types of supports, such as those for movable tables, for example.

In addition, the configuration for attaching the support to the base can be changed, for example, by inserting a bolt from the bottom side of the base and passing it through the cover plate, and fixing a nut at the penetrating end, or by screwing the bolt into the cover plate itself. Various modifications can be made without departing from the spirit of the present invention, such as drilling a hole and screwing a bolt inserted from the lower surface of the base into the screw hole.

[Effects of the invention] Since the present invention has the above-described configuration, it is possible to reduce the weight without reducing the rigidity, and moreover, it is possible to reliably treat the inner surface of the inner column member. Moreover, it is possible to provide a support for furniture such as a chair, which can reliably hide the part attached to the base part with a simple structure.

That is, according to the present invention, the inner column member that is vertically slidably combined with the outer column member is formed into a channel shape, and the upper opening edges and the lower opening edges are connected by the connecting plate and the cover plate. In addition to reducing the weight without reducing rigidity, it is possible to reliably process the inner surface of the inner column member through the opening, and the cover plate is provided on the inner periphery of the lower end of the opening. Since a notch is formed in the opening, the blind plate can be placed in a position where it hangs down to hide the lower end of the opening without interfering with the cover plate. In order to support the member on the base part, the connecting part between the inner column member and the base part is completely hidden, and in addition, the lower end of the blind plate is locked by the upper surface of the base part to prevent it from coming out. Therefore, various effects such as eliminating the need for a separate fastening tool for fastening the blind plate can be obtained.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the present invention,
Fig. 1 is a perspective view of the entire structure, Fig. 2 is a perspective view showing the legs, Fig. 3 is a front sectional view showing the inside of the column and horizontal member, and Fig. 4 is a perspective view showing the inner column member of the column. , FIG. 5 is a plan sectional view of the inner column member. FIG. 6 is an explanatory diagram for explaining the conventional problems. 3... Support column, 7... Inner column member, 8... Outer column member, 71... Member main body, 71a... One side wall, 71
b...Opening, 71c...Opening edge, 72...Connection plate, 73...Lid plate, 79...Blind plate, 2...Base part, 2a...Top surface, 71d...Tip edge, 73
a...notch part, 79b...inner engaging part, 79c...
...Outer engaging portion, 79d...lower end.

Claims (1)

[Scope of Claim for Utility Model Registration] A support for movable furniture such as a chair, which is formed by combining an inner column member and a pipe-shaped outer column member in a vertically slidable manner, wherein the inner column member is connected to one side wall in a continuous manner. a channel-shaped member body having an opening; a connecting plate rigidly attached to the upper end of the member body and connecting the opening edges; and a connecting plate rigidly attached to the inner periphery of the lower end of the member body and the opening of the member body. a lid plate that connects the edges; a notch formed on the lid plate for opening the tip edges of both opening edges of the member main body from the lid plate; It has an inner engaging part that contacts and an outer engaging part that contacts the outer surface side, and the inner engaging part and the outer engaging part sandwich each tip edge and are attached to the opening of the member main body. A movable furniture such as a chair, characterized in that the cover plate is attached to the upper surface of the base and the lower surface of the blind plate is locked by the upper surface of the base. pillar of.