JPH0537787Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a chair floor plate fixing device for attaching a chair to a floor plate supported at a distance from a floor base.

[Conventional technology]

Conventional chair fixing devices have a structure in which the lower end of the chair's spindle is inserted into a mounting hole drilled in the floor base, and then the diameter of the lower end is expanded to prevent it from slipping out. In addition, after inserting an anchor bolt into a mounting hole drilled in the floor base, adhesive or concrete is similarly poured and fixed, and the anchor bolt is fixed to a disc-shaped bottom plate fixed to the lower end of the chair's spindle. There is a structure that is inserted into a fixed hole and tightened with a nut (publication of Utility Model Publication No. 54-21215), but a structure that is fixed by expanding the diameter of the lower end of the support shaft is If the fixed position of the chair is changed or removed, the support shaft must be cut or the floor foundation must be dug up, and there is a risk that the support shaft may wobble during use. For anchors with a structure that requires adhesive or concrete that takes a certain amount of time to harden, fixing them is time-consuming and requires repositioning of anchor bolts once they are buried. Or, when removing it, the same problem as above occurred. Furthermore, in recent years, floor structures have emerged in which the floorboards are supported at a distance from the floorboard, and the space below the floorboards can be used for wiring and piping. It is desired to provide a fixing device that can be firmly installed in a short time with simple work.

[The problem that the idea aims to solve]

The present invention aims to solve the above-mentioned situation by making it possible to quickly and firmly attach the lower end of the chair spindle to the floorboard supported at a distance from the floor base with simple work. Another object of the present invention is to provide a chair floor plate fixing device that is easy to remove.

[Means to solve the problem]

In order to solve the above-mentioned problem, the present invention is a fixing device for attaching a chair to a floor plate supported at a distance from a floor base, in which a fixing plate is fixed approximately horizontally to the lower end of the support shaft of the chair, and the fixing plate is A plurality of mounting holes are formed around the support shaft of the chair, a through hole is formed at a position corresponding to the mounting hole of the floor plate to which the support shaft of the chair is to be fixed, and at least the upper part is formed as a spiral shaft. A substantially central portion of the locking member is pivotally attached to the lower end of the shaft by a horizontal pin so as to be rotatable in a vertical plane, and the weight of one side of the locking member is increased from the other side with the pin as a boundary. The anchor bolt is inserted into the mounting hole and the through hole from above with the locking member of the anchor bolt substantially parallel to the shaft body, and the locking member is placed horizontally on the lower surface of the floorboard. A chair floor plate fixing device is constituted by locking the floor plate with the screw shaft and screwing a nut onto the screw shaft.

[Effect]

The chair floor plate fixing device of the present invention having the above-mentioned contents aligns the mounting hole of the mounting plate fixed to the lower end of the support shaft of the chair with the through hole of the floor plate, and attaches the weight side of the locking member to the shaft of the anchor bolt. The locking member is inserted into the mounting hole and the through hole from above in a state in which it is approximately parallel with the light weight side facing down, and when the upper end of the locking member passes through the through hole of the floor plate, the weight side of the locking member is inserted into the shaft body. It pivots downward around the pivoted pin, pulls up the shaft with the locking member in a substantially horizontal position, locks the locking member in a horizontal position on the lower surface of the floorboard, and then lifts up the shaft. It is fixed by screwing a nut onto a screw shaft formed at the top, and when removing it, loosen or remove the nut, then push in the shaft and release the locking member from the bottom surface of the floorboard. The heavier side of the locking member rotates downward and the lighter side rotates upward, automatically becoming approximately parallel to the shaft, and when the shaft is pulled up in this state, the locking member passes through the through hole and the mounting hole. It is possible to pull it out.

〔Example〕

Next, the present invention will be further explained in detail based on the embodiments shown in the accompanying drawings.

1 and 2 show a typical embodiment of the present invention, in which A is a chair, 1 is a floor plate, 2 is a fixed plate fixed to the lower end of chair A, and 3 is a fixed plate 1 and 2. The anchor bolts to be connected are each shown.

The floor plate 1 is supported by a plurality of spacers 5, . A plurality of through holes 6, . In addition, the through hole 6
Although it is possible to drill holes before installing the floorboard 1 on the floor, it is of course also possible to drill holes at appropriate positions after installation.

The fixing plate 2 was welded and fixed to the lower end of the support shaft 7 of the chair A in a substantially horizontal manner, and a mounting hole 8 having approximately the same diameter as the through-hole 6 of the floor plate 1 was formed at a position corresponding to the through-hole 6 of the floor plate 1. It is something. In this embodiment, it is formed into a circular disc shape in plan view, the lower end of the support shaft 7 is welded to the center of the disc shape to form a flange shape, and for further reinforcement, four pieces of a plate punched in a cross shape are inserted in one direction. A reinforcing member 11 is bent at a substantially right angle to form a leg piece 9 and a shaft hole 10 in the center of which the support shaft 7 is fitted is inserted into the shaft hole 10. In addition, with the lower ends of the legs 9 in contact with the upper surface of the fixing plate 2, the mouth edge of the shaft hole 10 is welded to the support shaft 7, and the legs 9 are welded to the fixing plate 2, respectively. Further, adjacent through holes 12, 12 are provided on both sides of each mounting hole 8.
At the same time, a screw hole 13 is formed at a suitable position midway between the adjacent mounting holes 8, 8.

As shown in detail in FIG. 3, the anchor bolt 3 is composed of a shaft body 14 and a locking member 15.
At least the upper part of the shaft body 14 is made into a screw shaft 16.
A pin 17 is attached to the lower end of the
The locking member 15 is rotatably provided with a protruding piece 21 formed integrally with one end of the locking piece 15, and is attached to the pin 17 by means of a fastening piece 22. The locking member 15 is rotatably provided with a protruding piece 21 formed integrally with one end of the locking piece 15, and is fixed to the pin 17 by means of a fastening piece 22. The locking member 15 is rotatably provided with a protruding piece 21. The locking member 15 is rotatably provided with a protruding piece 22. The locking member 15 is rotatably provided with a protruding piece 21.
When the locking member 15 is rotated about the pin 17 so as to be substantially parallel to the shaft body 14, the shaft body 14 is pressed against the two side pieces 18, 18 of the locking member 15.
In this state, the dimensions are set so that the shaft body 14 and the locking member 15 can be inserted simultaneously through the through hole 6 of the floor plate 1 and the mounting hole 8 of the fixed plate 2.
is provided at one end, making one side of the locking member 15 heavier than the other side; however, the position of the center of gravity can be offset by shifting the position at which the locking member 15 is pivotally attached to the shaft 14 to one side in the lengthwise direction of the locking member 15 or by making one side longer.

Therefore, in order to fix the chair A to the floor plate 1, the fixing plate 2 fixed to the lower end of the support shaft 7 of the chair A is attached to the floor plate 1.
The through hole 6 of the floor plate 1 and the mounting hole 8 of the fixing plate 2 are aligned, and the shaft body 14 is moved with the projecting piece 21 of the locking member 15 facing upward as shown in FIG. Anchor bolt 3 in a state approximately parallel to
is inserted into the mounting hole 8 and the through hole 6 from above, and if the upper end of the locking member 15 passes through the lower surface 22 of the floorboard 1 as shown in FIG. When the locking member 15 becomes approximately horizontal, the shaft 14 is pulled up and the locking member 15 is brought into contact with the locking member 15 as shown in FIG. The piece 20 is brought into contact with the lower surface 22 of the floorboard 1, and a flat washer is attached to the screw shaft 16 of the anchor bolt 3 as shown in FIG.
The nut 23 is screwed and fixed via a spring washer or the like.

Furthermore, when removing the anchor bolt 3, by removing or loosening the nut 23 and pushing in the shaft body 14, the locking member 15 is separated from the lower surface 22 of the floor plate 1 and can freely rotate around the pin 17. The heavy side of the locking member 15 rotates downward and the light side rotates upward, so that it becomes approximately parallel to the shaft 14 as shown in FIG. 7, and in this state, the shaft 14 is pulled upward. As a result, the anchor bolt 3 can be removed, and the support shaft 7 of the chair A can be easily removed from the floorboard 1.

Furthermore, in this embodiment, a cover 24 that can cover the lower part of the fixed plate 2 and the support shaft 7 can be attached. As shown in FIGS. 1 and 2, the cover 24 is made of a dish-shaped curved body that is circular in plan view and larger than the fixing plate 2, and has an opening 25 in the center through which the support shaft 7 can be inserted, and a peripheral edge. A pressing part 27 that curves downward and presses a floor surface sheet such as a carpet 26.
A hole 28 is formed at a position corresponding to the screw shaft 16 of the fixing plate 2, and a bolt 29 inserted through the hole 28 is screwed into the screw shaft 16 of the fixing plate 2. , the carpet 2 is pressed by the pressing part 27.
The opening edge of the notch 30 which accommodates the fixing plate 2 formed in 6 is pressed to prevent it from turning over, and the fixing plate 2 and the reinforcing member 11 are covered to improve the appearance. In this embodiment, the fixing plate 2
A cylindrical body 31 of a predetermined height is inserted over the bolt 29 between the cover 24 and the cover 24, so that the pressing force of the carpet 26 by the pressing part 27 does not become excessive, and the cover 24 can be attached without rattling. I have to. Furthermore, as shown in FIG. 8, it is also possible to wind a compression coil spring 32 in place of the cylinder 31. Furthermore, a cap 34 made of soft synthetic resin is fitted over the head 33 of the bolt 29 in an outer covering manner to improve the appearance.

Further, as in the present invention, the fixing plate 2 at the lower end of the support shaft 7 of the chair A and the floor plate 1 can be firmly fixed with the anchor bolts 3, but with the floor plate 1 made of plywood such as plywood, it is necessary to further increase the mounting strength. It is also possible to insert wood screws 35 into the through holes 12 formed in the fixing plate 2 and screw them into the floorboard 1.

The support shaft 7 also has an annular groove 36 on the outer periphery of the upper edge.
A ring member 37 having a ring member 37 is fitted onto the outside and its lower edge is brought into contact with the mouth edge of the opening 25 of the cover 24, and a ring member 37 is further formed on the inner periphery of the lower edge of the bellows 38 wound around the entire length of the support shaft 7. The retaining pawl 39 is engaged with the annular groove 36, and the upper end of the bellows 38 is pressed and connected to the lower surface of the seat 40 in a compressed state to constantly press the ring member 37 downward, so that the ring member 37 cover 2
I try not to stray away from 4.

[Effect of idea]

According to the chair floor plate fixing device of the present invention as described above, in the fixing device for attaching a chair to a floor plate supported at a distance from a floor base, the fixing plate is fixed substantially horizontally to the lower end of the support shaft of the chair, and , a plurality of attachment holes are formed around the support shaft of the fixed plate, a through hole is formed at a position corresponding to the attachment hole of the floor plate to which the support shaft of the chair is to be fixed, and at least the upper part is screwed. A substantially central portion of the locking member is pivotally attached to the lower end of the shaft body using a horizontal pin so as to be rotatable in a vertical plane, and the weight of one side of the locking member is reduced by using the pin as a boundary. An anchor bolt made larger than the other side is used, and the locking piece of the anchor bolt is inserted into the mounting hole and the through hole from above with the locking piece being approximately parallel to the shaft, and the locking member is attached to the floor plate. Since it is fixed horizontally on the lower surface and fixed by screwing a nut onto the screw shaft, the fixing plate is placed on the floor plate with the through hole and the mounting hole aligned, and the axis of the anchor bolt is fixed. The locking member is inserted into the mounting hole and the through-hole from above from above in a state in which the weight side of the locking member is at the top and the light side is at the bottom, and the locking member is approximately parallel to the body, and when the upper end of the locking member passes through the through-hole. The weight side rotates downward, and the shaft is pulled up with the locking member in a substantially horizontal state, and the locking member is locked horizontally on the lower surface of the floorboard, and the screw formed on the top of the shaft is By simply screwing a nut onto the shaft and fixing it, you can attach the chair to the floorboard extremely easily and in a short time.Moreover, with post-processing that only requires drilling a through hole in the pre-installed floorboard,
The lower end of the support shaft of the chair can be firmly fixed to the floorboard. Further, in many cases, it is not possible to form screw holes for bolt tightening in ordinary floorboards due to the material and strength thereof, and even in such cases, the chair can be firmly fixed to the floorboard by using the fixing device of the present invention.

In addition, when removing the anchor bolt, remove or loosen the nut and push in the shaft body to separate the locking member from the bottom surface of the floorboard. The chair can be removed very easily by simply rotating it and pulling it up with the locking member substantially parallel to the shaft, and the chair can be repositioned or removed in a short period of time. Ta.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional side view of the main parts showing a typical embodiment of the chair floor plate fixing device of the present invention, Fig. 2 is an exploded perspective view of the main parts, Fig. 3 is an overall perspective view of the anchor bolt, and Fig. 4 Figures 6 to 6 are explanatory vertical sectional views showing how the anchor bolt is inserted into the mounting hole of the fixing plate and the through hole of the floor plate to lock the locking member to the bottom surface of the floor plate, and Figure 7 is an explanatory longitudinal sectional view showing how the anchor bolt is inserted into the mounting hole of the fixed plate and the through hole of the floor plate, and the locking member is locked to the lower surface of the floor plate. FIG. 8 is an explanatory vertical cross-sectional view showing the state in which the cover is removed, and FIG. 8 is a partial vertical cross-sectional view showing the structure for attaching the cover to the fixing plate. A...chair, 1...floorboard, 2...fixing plate, 3...
... Anchor bolt, 4 ... Floor base, 5 ... Spacer, 6 ... Through hole, 7 ... Support shaft, 8 ... Mounting hole,
9... Leg piece, 10... Shaft hole, 11... Reinforcement member,
12...Through hole, 13...Threaded hole, 14...Shaft, 1
5... Locking member, 16... Screw shaft, 17... Pin,
18...Side piece, 19...Mounting piece, 20...Stopping piece, 21...Protruding piece, 22...Bottom surface, 23...Nut, 24...Cover, 25...Opening, 26...Carpet, 27... Pressing part, 28... Hole, 29...
...Bolt, 30...Notch, 31...Cylinder, 32...
... Compression coil spring, 33 ... Head, 34 ... Cap, 35 ... Wood screw, 36 ... Annular groove, 37
... Ring member, 38 ... Bellows, 39 ... Locking claw, 40 ... Seat.

Claims (1)

[Claims for Utility Model Registration] In a fixing device for attaching a chair to a floor plate supported at a distance from a floor base, a fixing plate is fixed approximately horizontally to the lower end of the support shaft of the chair, and the support shaft of the fixing plate is A lower end of a shaft body having a plurality of mounting holes formed around the periphery, a through hole formed at a position corresponding to the mounting hole of the floor plate to which the support shaft of the chair is to be fixed, and further having at least an upper portion formed as a helical shaft. An anchor in which a substantially central portion of a locking member is pivotally attached to a horizontal pin so as to be rotatable in a vertical plane, and the weight of one side of the locking member is greater than the other side with the pin as a boundary. Using a bolt, the locking piece of the anchor bolt is inserted into the mounting hole and the through hole from above in a state substantially parallel to the shaft, and the locking member is locked horizontally to the lower surface of the floorboard. A chair floor plate fixing device comprising a nut screwed onto a screw shaft.