JPH0220901B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a kotatsu yagura used in ordinary households.

[Technical background of the invention and its problems]

During the cold season, there are many opportunities to use kotatsu in each household, but traditional kotatsu are both ``horigotatsu'' and ``okikotatsu''. It was impossible to adjust.

Therefore, depending on the user's conditions of use, for example, the purpose is simply to keep warm, or the ``yagura'' is used as a desk for reading or writing, or it is used as a table for meals or a mahjong table. Depending on the purpose of the tower, the height may be too high or too low, and if the tower is used as a study table for a child, a certain height of the tower will not suit the height and will naturally force an incorrect posture. However, the fact that the height of the tower remains constant has resulted in more inconvenience and inconvenience.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and is designed to provide support legs at the four corners of the "yagura" so that the height of the "yagura" can be adjusted to the optimal state for the work each time according to the purpose of keeping warm. make it elastic,
However, the object of the present invention is to provide a kotatsu tower whose height can be easily and reliably adjusted to an average level by operating only one of the four legs in conjunction with the other tripods.

[Summary of the invention]

The outline of the present invention for achieving the above object is that fixed shafts are installed vertically at the four corners of a frame body, the upper half of each fixed shaft is formed into a round bar, the lower half is formed into a square bar, and the upper half is formed into a round bar. An operating tube to which a chain gear with an endless chain is fixed is rotatably fitted onto the fixed shaft, and a screw is carved on the outer circumferential surface of the operating tube to be screwed into the screw provided on the inner circumferential surface of the operating tube. and screwing a support leg having a square hole for inserting the square rod in the center into the operation tube,
It is characterized by a structure in which the height of the tower can be adjusted freely.

[Embodiments of the invention]

Hereinafter, embodiments of the kotatsu yagura according to the present invention will be specifically described based on the drawings.

Reference numeral 1 denotes a frame of a kotatsu yagura, and nuts 15 are connected to the four corners of the frame through washers 13 and 14 from the upper surface of the frame 1, respectively.
The fixed shaft 2, which is fastened by the above, hangs down. The upper half of each fixed shaft 2 is a round bar 2a having a step G, and the lower half is a square bar 2b. Reference numeral 3 denotes an operating barrel rotatably fitted onto each fixed shaft 2. A chain gear 4 is fixed to the upper part of this operating barrel 3, and as shown in FIG. 4 and one endless chain 5 in order so as to interlock with other chain gears 4. A screw groove 6 is provided on the inner circumferential surface of each operating barrel 3.

Reference numeral 7 denotes a support leg that is screwed into the operation cylinder 3, and each support leg 7 has a thread 8 formed on its upper outer peripheral surface to be screwed into the screw groove 6, and the center part of the support leg 7 has the corner. A square hole 9 is bored into which the rod 2b is inserted.

Incidentally, reference numeral 10 denotes a collar provided at the intermediate portion of the fixed shaft 2, which rotatably holds the operation tube 3 in a fixed position. Further, reference numeral 11 denotes a chain cover provided on the lower surface of the frame 1 to surround the chain 5, and is provided to prevent the chain 5 from being directly exposed to the outside. moreover,
Reference numeral 12 denotes long holes drilled at the four corners of the frame 1 to fasten the fixed shaft 2, and the shaft can be moved so that the tension of the chain 5 can be adjusted.

In the present invention, when adjusting the height of the Kotatsu Yagura, by rotating any one of the operation tubes 3 fitted in the four corners of the frame 1 in either the forward or reverse direction, the operation tube can be adjusted. The screw groove 6 on the inner peripheral surface guides the screw thread 8 of the support leg, and the square rod 2b is inserted into the square hole 9.
The support leg 7 is moved upward or downward along. At this time, since the square rod 2b of the fixed shaft is inserted into the square hole 9 of the support leg 7, the support leg 7 is prevented from rotating together with the rotation of the operating barrel 3, and therefore the screw groove The support leg 7 is guided by the screw thread 8 which is screwed into the support leg 6.
can be reliably moved only in the vertical direction, and the height of the "tower" can be adjusted to an appropriate position by rotating the operation tube 3. In addition, for this height adjustment, when one of the operating tubes 3 fitted to the fixed shaft 2 is manually rotated, the other tripods are simultaneously linked by the endless chain 5 that spans each chain gear 4. Since the other supporting legs 7 similarly move in the vertical direction, the height of the "tower" can be adjusted to the average height with a single operation.

Although not shown in the figure, for example, if the operation tube is equipped with a switch that lowers the temperature of the heat source of the kotatsu when the supporting legs move up inside the operation tube and the ``yagura'' is in a low position. , which is more preferable in terms of safety.

〔Effect of the invention〕

As explained above, according to the present invention, the Kotatsu Yagura can be adjusted to the optimal height position at any time depending on the purpose of use such as keeping warm and the physique of the user, so the Kotatsu Yagura can be used in many ways. It is very convenient to use, and has excellent effects, such as being able to adjust it by simply rotating only one of the four legs by hand. Further, even if the operation tube is rotated when adjusting the height of the kotatsu tower, the supporting legs do not rotate accordingly, so there is no risk of damaging the floor or tatami surface.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing the main parts of the kotatsu yagura according to the present invention, FIG. 2 is an exploded perspective view of the main parts, and FIG. 3 is a perspective view showing one embodiment of the kotatsu yagura FIG. 4 is a plan view thereof, and FIG. 5 is a partially cutaway bottom view. 1...Frame body, 2...Fixed shaft, 2a...Round bar, 2
b...Square bar, 3...Operation cylinder, 4...Chain gear, 5...Endless chain, 6...Screw groove (screw),
7... Support leg, 8... Screw thread, 9... Square hole.

Claims (1)

[Claims] 1 Fixed shafts were installed vertically at the four corners of the frame, the upper half of each fixed shaft was formed into a round bar, and the lower half was formed into a square bar, and a chain gear with an endless chain stretched over the upper part was fixed. An operating tube is rotatably fitted onto the fixed shaft, and a screw is carved on the outer circumferential surface of the operating tube to be engaged with a screw provided on the inner circumferential surface of the operating tube, and an insertion angle of the square rod is formed in the center of the operating tube. A kotatsu tower characterized by a supporting leg having a hole screwed into an operating tube.