JPH0546695Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention mainly relates to a moving device for connected chairs that are movably installed in orchestra pits of theaters and halls.

(Prior Art) Generally, movable connecting chairs are often installed in the orchestra pits of the aforementioned theaters and halls to accommodate various events. This movable connected chair has a moving device using casters at the bottom of a normal fixed connected chair. An example of this moving device is shown in Japanese Utility Model Publication No. 55-52846.

(Problem to be solved by the invention) By the way, in such a conventional articulated chair moving device, raising and lowering an arm provided with casters requires lifting and lowering the chair itself, operating a release lever, etc., and pressing the arm directly by hand. It has to be done by moving the machine, which is cumbersome and inefficient.
There was a problem in that it required a lot of effort and time to put away and take out a large number of connected chairs in a large hall.

This invention was developed in view of the above circumstances, and allows the arm equipped with casters to be raised and lowered with a very simple one-touch operation, such as lifting the connected chair a little or pressing the release control lever, making it possible to move the connected chair. It is an object of the present invention to provide a device for moving connected chairs that can be carried out efficiently.

[Structure of the idea]

(Means for Solving the Problems) In order to achieve the above-mentioned object, the moving device for connected chairs of the present invention includes a bracket fixedly installed near each of the lower legs on both sides of the connected chair, and a supporting shaft attached to the bracket. A pair of front and rear arms are provided which extend forward and backward so as to be rotatable up and down by pivotally connecting the lower base ends of each arm through the front and rear arms, and a caster is provided at the lower end of each of the front and rear arms, a pin, front and rear links that are rotatably connected to each other by the intermediate pin, a front pin that rotatably connects the front end of the front link to the upper base end of the front arm, and a rear end of the rear link. and a rear pin rotatably connected to the upper base end of the rear arm, and by expanding the front and rear links horizontally to each other, the front and rear arms are held in a horizontally expanded state. The caster at the bottom of each tip is grounded on the floor instead of the leg body, and the front and rear links are compressed into a V-shape by pressing down on the intermediate pin, causing the front and rear links to project against the front and rear arms. A toggle link mechanism is provided to release the tension, and the front and rear links of the toggle link mechanism are constantly biased in the direction of expanding each other, and when the worker lifts the chair, the toggle link mechanism is released. A spring that automatically sets the toggle state, and a stopper that prevents the intermediate pin from moving further upward from the toggle state where the front and rear links of the toggle link mechanism are extended horizontally are provided, and the stopper is further stepped on by the worker. The present invention is characterized in that a release operation lever is provided which rotates to push down the intermediate pin of the toggle link mechanism to release the toggle state.

(Function) In the connected chair moving device configured as described above, when a worker lifts up the connected chair a little by hand, the front and rear arms having casters at the bottom of the tips automatically rotate downward due to their own weight and spring force. As a result, the front and rear links of the toggle link mechanism automatically expand to a horizontal position, and further upward rotation is prevented by the stopper. The links hold the front and rear arms in a horizontally expanded state. That is, the toggle link mechanism is in a toggle state. As a result, the casters at the lower end of each of the front and rear arms are movably grounded on the floor instead of the legs, that is, the legs of the connected chair are held floating on the floor. In this state, by lightly pushing the connected chair by hand, it can be moved to the desired location.

Also. Once you have moved to the desired location, step down on the release control lever with your foot and push down the intermediate pin of the toggle link mechanism, and the front and rear links will contract together into a V-shape, tensioning the front and rear arms. Release. In other words, the toggle is released, and the connected chair descends while pushing up the front and rear caster arms by its own weight, and its legs touch the floor and become stable, allowing the audience to sit on it.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

First, the overall structure of the connected chair will be explained with reference to FIGS. 5 to 7. Reference numeral 1 in the figure is a connected chair for seating three people. are erected at equal intervals, and a seat 4a and a backrest 4b are installed between each of these side plates 3 to constitute a seat 4, and two legs 5 are installed on the lower side of the transverse 2. , 5 are attached in a hanging state, spaced apart from each other in the direction of both ends.
The legs 5 on both sides have a wide base plate 5a at the lower end which is long in the front and back so that the legs 5 can touch the floor A over a wide area and stand stably. It can also be fixed with bolts etc.

A through member 6 made of a single steel plate is provided between the base plates 5a, 5a of the legs 5, 5 on both sides of the connected chair 1.
is attached by welding. And this piercing material 6
The moving device 7 of the present invention is provided near both side legs 5, 5, which are near both ends.

The configuration of this moving device 7 will be described with reference to FIGS. 1 to 4. First, a bracket 8 is fixed to the upper surface of the through member 6 using a fastener 9 such as a countersunk bolt and a cap nut with a spring. This bracket 8 has a structure having a bearing plate 8a standing upright from front to back in the center of a flat plate, and a pair of front and rear support shafts 10, 10 are inserted in the front and rear shaft holes of the bearing plate 8a of this bracket 8 in the left-right direction. It penetrates horizontally.

A pair of front and rear arms 11, 11 are provided which extend forward and rearward by having their lower proximal ends pivotally connected to the front and rear support shafts 10, 10, respectively. These front and rear arms 11, 11 are each made of square steel tubes, and have an inverted U-shaped hanging plate 1 that straddles the bearing plate 8a at the bottom of the base end.
1a, and by fitting this into the support shaft 10, the front and rear arms 11, 11 are attached so as to be vertically rotatable. These front and rear arms 11, 11
A swivel caster 12 is provided at the bottom of each tip.

Further, a toggle link mechanism 13 is provided that connects the base end portions of the front and rear arms 11, 11 so as to be expandable and retractable. This includes a pair of links 14, 14 and 15, 15 on both sides of the front and rear, an intermediate pin 16 that pivotally connects these front and rear links, and a front end of the front links 14, 14 connected to the base of the front arm 11. A front pin 17 is pivotally connected to both sides of the rear arm 11 via a spacer, and a rear pin 18 is pivotally connected to both sides of the base end of the rear arm 11 via a spacer. It consists of

A torsion coil spring 20 is wound around the intermediate pin 16 of the toggle link mechanism 13 via a collar 19, and the extending portions at both ends are connected to the front and rear links 14, 15.
is locked from above to the front and rear links 14,1.
5 are always urged in the direction of expanding each other (that is, in the direction of pulling the intermediate pin 16 upward).
Note that this spring force is weaker than the load of the connected chair 1. That is, by lifting the connected chair 1 a little to reduce the load, the spring force expands the toggle link mechanism 13 and rotates the front and rear arms 11, 11 downward, and the casters 12, 12 at the lower end of each are rotated as described above. Instead of the legs 5, it can be grounded to the floor A so that it can run.

Furthermore, a hat-shaped cover 22 is provided on the upper surface of the bracket 8 with hexagon socket head bolts 21 to cover the upper side of the toggle link mechanism 13, and a stopper is attached to the top plate of the cover via a high nut 23 so that the height can be adjusted. 24 is attached, and this receives the upward movement of the intermediate pin 16 of the toggle link mechanism 13 against the spring 20 from directly above, and the toggle link mechanism 1 is expanded by the force of the spring 20.
3 toggle state (a state in which the front and rear links 14 and 15 are horizontally spread and stretched) is maintained.

Further, a release operation lever 25 for releasing the toggle state of the toggle link mechanism 13 is provided.
This release operation lever 25 is a foot-operated type made by bending a round steel pipe into a planar substantially U-shape. A hanging plate 25a made of a steel plate or the like is welded to the rear lower side of both pipe parts, and this rear end The lower part is the toggle link mechanism 1
3, so that it can be rotated up and down by fitting into the rear pin 18 of 3, and the front part rests on the intermediate pin 16, and if you step down on the front end part slightly with your foot, it can be toggled. The toggle state can be released by pushing down the intermediate pin 16 of the link mechanism 13 against the spring 20.

With the connected chair moving device 7 having the above configuration, if the connected chair 1 is slightly lifted by hand to reduce the load, the front and rear arms 11, 11 having the casters 12 at their tips can be moved by their own weight and springs. With the force of 20, the links 14 and 15 of the toggle link mechanism 13 automatically rotate downward and become horizontal with each other. The rotation of the toggle link mechanism 1 is prevented by the stopper 24.
The front and rear links 14 and 15 of 3 are the front and rear arms 1
1 and 11 are stretched horizontally and held against each other. That is, the toggle link mechanism 13 is in a toggle state. With this, the caster 12 at the lower tip of each of the front and rear arms 1 and 11 is movably grounded on the floor surface A in place of the leg body 5, that is, the leg body 5 of the connected chair 1 is kept floating on the floor surface A. do. By lightly pushing the connected chair 1 in this state, it can be moved to the desired location.

Once the user has moved to the desired location, he/she depresses the release lever 25 with his or her foot once. As a result, the intermediate pin 16 of the toggle link mechanism 13 is momentarily pushed down by the hanging plate 25a of the release operation lever 25, and the toggle state of the toggle link mechanism 13 is released. As it is, the connected chair 1 descends by its own weight while pushing up the arms 11, 11 with the front and rear casters 12 against the spring 20, and is stabilized by landing on the floor A with the legs 5, so that the audience etc. can be seated. It becomes like this.

[Effect of idea]

Since the present invention is configured as described above, the arm equipped with casters can be raised and lowered with a very simple one-touch operation, such as lifting the connected chair a little or pressing the release operation lever, and the movement of the connected chair can be carried out. This is an extremely practical mobile device that can efficiently perform the following tasks.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a partially sectional side view of the main part, Fig. 2 is a partially sectional plan view of the main part, and Fig. 3 is a partially sectional side view of the main part. 4 is a partially sectional side view showing the operating state of the main parts of the chair, FIG. 5 is a side view of the entire connected chair, FIG. 6 is a front view of the same, and FIG. FIG. DESCRIPTION OF SYMBOLS 1... Connecting chair, 5... Leg body, 7... Moving device, 8... Bracket, 10... Support shaft, 11...
Arm, 12... Caster, 13... Toggle link mechanism, 20... Spring, 24... Stopper, 2
5...Release operation lever.

Claims (1)

[Claim for Utility Model Registration] A bracket is fixed near each of the legs on both sides of the lower part of the connected chair, and the lower base end of each is pivotally connected to the bracket via a support shaft, so that each can be rotated up and down. A pair of front and rear arms extending forward and rearward is provided, a caster is provided at the lower end of each of the front and rear arms, and an intermediate pin, a front and rear link rotatably connected to each other by the intermediate pin, and A front pin rotatably connects the front end of the front link to the upper base end of the front arm; and a rear pin rotatably connects the rear end of the rear link to the upper base end of the rear arm. By deploying the front and rear links horizontally, the front and rear arms are held in a horizontally spread state, and the casters at the bottom of each tip run on the floor instead of the legs. A toggle link mechanism is provided in which the toggle state allows the robot to make contact with the ground, and the toggle release state where the front and rear links are compressed into a V-shape by pressing down on the intermediate pin to release the tension on the front and rear arms. A spring that constantly biases the front and rear links of the toggle link mechanism in the direction of expanding each other and automatically turns the toggle link mechanism into a toggle state when the worker lifts the chair; A stopper is provided to prevent the intermediate pins from moving further upward from the toggle state in which they are expanded horizontally, and the intermediate pin of the toggle link mechanism is rotated by stepping on it with the foot of the worker, and the intermediate pin of the toggle link mechanism is pushed down to return to the toggle state. A moving device for a connected chair, characterized in that it is configured with a release operation lever for release.