JP2519189Y2 - Telescopic staircase - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Industrial field of application) The present invention relates to a telescopic staircase seat installed in a building such as a gymnasium or various halls, and particularly, a multi-stage movable floor stand. Telescopic staircase with a safety lock function to prevent the deck from slipping.

(Prior Art) In recent years, for the multipurpose use of buildings such as a gymnasium and various halls, many retractable staircase-like bleachers called rollback stands are installed. An example of this type of telescopic staircase is shown in Japanese Utility Model Publication No. 63-16777.

This will be briefly described with reference to FIG. First, 1 in the figure ...
Is a moving floor stand with a plurality of stages in front and back, which are arranged in a row in the front and back and have different heights in order. The movable floor bases 1 ... At each stage include a pair of left and right leg bases 3 having traveling wheels 2 at the front and rear, and a pair of left and right support columns 4 standing upright on approximately the middle portion of the left and right leg bases 3 in the front-rear direction. A cross-penetrating member 5 such as a lip grooved steel attached to the front surfaces of the upper ends of the left and right columns 4 and the left and right columns 4
It is composed of a deck 6 having a rear portion attached to the upper end portion thereof and extending horizontally forward. These movable beds 1 of the front and rear stages are arranged in order from the front stage to the rear stage by changing the lengths of the columns 4 so that they can be inserted into and removed from the lower side of the rear stage. The height is increased, and the left-right pedestals 3 and the left-right struts 4 are set to be wider in the left-right direction sequentially from the front stage to the rear stage. Thus, when in use, the movable bed 1 at the lowermost stage (frontmost stage) is sequentially moved forward by appropriate driving means to develop in a stepwise manner, and when not in use, it is sequentially retracted from the movable bedbed 1 at the frontmost stage. Rear movable floor 1
It can be stored under the deck 6 of the.

Also, the deck 6 above the moving floors 1 ...
Is a pair of left and right support beams 6a extending forward with the rear ends attached to the upper end portions of the left and right columns 4, and the support beams 6a.
It is composed of a floor board 6b laid so as to be mounted on the upper surface. The floor boards 6b of the decks 6 of the respective steps are configured such that the front-rear width and the left-right length of the respective steps are substantially the same. The left and right support beams 6a of the deck 6 of each stage are the moving floors 1 of the preceding stages.
Support rollers 7 provided on the upper ends of the left and right support columns 4
It is horizontally supported by being movably mounted on it.
The front end of the deck 6 above the movable bed 1 at the frontmost stage is fixed and supported by a fixing member 8 provided on the front ends of the left and right legs 3 to keep the deck 6 horizontal.

On the upper surface of the deck 6 of each stage, as shown in the drawing, many tilting type viewing chairs (connecting chairs) 9 are arranged in a row and mounted. The viewing chair 9 is a foldable chair including a leg 9a, a seat 9b, a backrest 9c and an armrest 9d which are interlocked with each other. The lower end of each leg 9a is pivotally attached to a mounting base 10 provided at the rear of the upper surface of the deck 6 so that it can stand and fall.
Further, by rotating the tilting rotation shaft 11 provided on the mounting base 10 by a driving means such as a motor, the entire viewing chair 9 stands up together with the legs 9a in association with this, and the viewer can sit. On the other hand, in the folded state, on the other hand, the legs 9a as well as the legs 9a can fall over so as not to interfere with the retreat of the rear stage of each of the movable floor beds 1 ...

Further, stoppers 12 are provided at the rear ends of the left and right leg bases 3 of the movable floor bases 1 ... In each stage, and the stoppers 12 are provided at the lower portions of the left and right columns 4 of the movable floor base 1 of the second and subsequent stages from the front. A lock lever 13 that can be engaged and disengaged is provided rotatably on a stopper 12 of the movable floor base 1 at the previous stage, and the engagement of the stopper 12 and the lock lever 13 allows the movable floor bases 1 at each stage to separate from each other. Instead, it is designed to be deployed and positioned in a step-like manner while maintaining the linked state.

(Problems to be solved by the invention) By the way, in the above-mentioned telescopic staircase seat,
When used in a staircase-like manner, the moving floors 1 at the front and rear stages ...
The lower part of each is linked and positioned by the engagement of the stopper 12 and the lock lever 13 and does not move forward and backward, but the deck 6 supported on the upper part of the pillar 4 of the moving floor base 1 at each stage has an earthquake or a viewer. 4 due to the extreme movement of
There is a great deal of swaying in the front, rear, left and right, and the decks 6 in the front and rear stages are displaced from each other.

Therefore, when the moving floors 1 of the respective stages are in a stepwise expanded state, the lock pins are projected upward from the rear portion of the upper deck 6 of the moving floors 1 of the respective stages, and these are moved to the moving floors of the respective subsequent stages. The deck 6 at the top of the platform 1 was locked to the front end of the deck 1, and the decks 6 of the respective stages were linked to each other to prevent shaking and slippage.
However, vibrations between the front and rear decks may propagate through the lock pins, causing the respective decks to resonate with each other and cause a large shake.

Therefore, it is possible to suppress the propagation of vibration by inserting the lock pin into the anti-vibration rubber provided on the deck of the movable floor base 1.

For this purpose, a structure is used in which a vibration proof rubber having an engagement hole is fixed to the lower front end portion of the deck, and a lock pin is inserted into the engagement hole of the vibration proof rubber.

By the way, since the moving floors 1 ... Add the weight of a large number of viewers sitting on the bleachers, when the viewers move or the like, a large force is applied between the moving floors in the direction of shift. Yes (displacement occurs).

However, as described above, simply inserting the lock pin into the anti-vibration rubber cannot support the excessive force in the direction in which the moving floor base 1 ... The rubber itself may be damaged.

In this case, there is a problem that the effect of suppressing the propagation of vibration cannot be stably maintained, and improvement is desired.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an extendable staircase-type bleaching seat that can stably maintain the effect of suppressing the propagation of vibrations between decks.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above-mentioned object, the telescopic staircase of the telescopic staircase according to claim 1 is projected on the upper part of the movable floor base when it is deployed. The lock pins are provided, and the anti-vibration rubber provided with the engaging hole into which the protruding lock pin is inserted is provided at the lower front end portion of the deck above the moving bed in each subsequent stage. A fixing member that is fixed to the lower front end portion of the vibration damping rubber is provided on the wall portion that covers the vibration damping rubber from the periphery and stores the vibration damping rubber inside and also that covers the engagement hole side of the vibration damping rubber. Is a receiving frame having a pin insertion / extraction hole larger than the engagement hole for exposing the engagement hole to the outside, and when the displacement between the movable floor bases occurs, the lock pin and the inner surface of the pin insertion / extraction hole are contacted with each other. It is supposed to be accessible.

In the telescopic staircase according to claim 2, the end portion of the engagement hole according to claim 1 on the side of the pin insertion / extraction hole is arranged so that the lock pin can be smoothly inserted into the engagement hole. , And the pin insertion / extraction holes are tapered holes whose diameters change in sequence.

The retractable staircase seat according to claim 3 has the engagement hole according to claim 1 or 2 in order to smoothly insert the lock pin into the engagement hole. It is formed with a diameter larger than the outer diameter.

(Operation) According to the telescopic staircase seat according to claim 1, even if a force in a direction of displacement is applied to the movable floor pedestals at the front and rear stages, the lock pins are inserted even if the positional displacement occurs between the movable floor pedestals. Since the periphery of the anti-vibration rubber is covered by the receiving frame that constitutes the fixing member, unreasonable deformation of the anti-vibration rubber is restricted,
The anti-vibration rubber will not fall off or be damaged.

Moreover, even if an excessive force that damages the anti-vibration rubber is applied, the lock pin deforms the anti-vibration rubber and makes contact with the inner surface of the engaging hole, so that the lock pin directly applies force to the moving floor. Therefore, the anti-vibration rubber will not fall off or be damaged, and a stable vibration propagation reduction effect can be expected.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The overall structure of the retractable staircase seat is basically the same as the structure shown in FIG.
Further, in the figure, the same components as those shown in FIG. 3 are designated by the same reference numerals to simplify the description.

FIG. 1 is a partial cross-sectional view showing the positional relationship between the upper decks 6 of the movable floors 1 and 1 at the front and rear stages on the way in the stepwise expanded state,
FIG. 2 is a partial cross sectional bottom view taken along the line II-II of FIG.

As shown in FIGS. 1 and 2, lock pins 20 are provided near the left and right columns 4 on the rear surface of the cross member 5, which is the rear portion of the deck 6 above the movable floor 1. A drive mechanism 30 that drives the lock pin 20 up and down is provided. Engagement portions 40 that engage with each other by the lock pins 20 projecting upward are provided at the left and right side portions of the lower front end portion of the deck 6 above the movable floor 1 at the subsequent stage (upper stage). There is.

The lock pin 20 is composed of a single long round bar, and has a head portion 21 having a taper on the upper end and the head portion 21.
It has a long shaft portion 22 continuous with a slightly smaller diameter at the lower end of 21 and a bulge detecting portion 23 formed at the lower end of the shaft portion 22 with a larger diameter.

The vertical drive mechanism 30 for the lock pin 20 uses a small reversible motor 31 and a gear transmission 32 called a linear head directly connected to the motor 31.
The gear transmission is attached to the bracket 33 that is bolted to the rear surface of
The whole is attached by fastening 32 base parts. The motor 31 with the gear transmission 32 is commercially available, and the shaft portion 22 of the lock pin 20 is provided inside the gear transmission 32.
Is penetrated vertically. The lock pin 20 can be moved up and down by the forward and reverse rotations of the motor 31 via a rack (not shown) such as a rack and a pinion built in the gear transmission 32.

As described above, the lock pin 20 has the shaft portion 22 penetrated by the gear transmission portion 32, and the head portion 21 slides on the rectangular tubular guide portion 34 integrally formed on the upper portion of the bracket 33 via the bush 35. By being fitted, it is supported so as not to move except in the vertical direction.

Further, a hanging plate 36 is projectingly provided at a lower portion of the bracket 33, and a pair of upper and lower limit switches 3 which are detectors are provided on the hanging plate 36.
7, 38 are installed. These limit switches 3
7, 38 respond to the bulge detecting portion 23 as the lock pin 20 moves up and down, detect the rising and falling states of the lock pin 20 and feed them back to the motor 31.

On the other hand, the engaging portion 40 is a receiving frame 41 (constituting a fixing member) having a U-shaped cross section and made of a hat-shaped steel, which is fixed to the bottom surface of the floor plate 6b of the deck 6 with screws or the like, and a protective frame housed therein. It is composed of a vibrating rubber 42. This anti-vibration rubber
Reference numeral 42 is a thick square shape that fits into the receiving frame 41, and a round engagement hole 42a is vertically formed in the central portion.

The anti-vibration rubber 42 is restricted from moving by the wall portion of the receiving frame 41 that covers the periphery of the anti-vibration rubber 42.

Further, a pin insertion / extraction hole is formed in the central portion of the bottom plate portion of the receiving frame 41 that covers the periphery of the receiving frame 41 on the side of the engaging hole 42a.
A large-diameter hole 41a having a larger diameter is formed, and the head portion 21 of the lock pin 20 can be inserted into and removed from the engagement hole 42a of the vibration-proof rubber 42 from here. And this anti-vibration rubber 42
The vibration propagation between the front and rear decks 6 is reduced.

Further, the end portion of the engagement hole 42a on the pin insertion / extraction hole side is formed with a tapered hole 42b whose diameter changes in sequence with the large diameter hole 41a so as to guide the lock pin 20 to be inserted. .

The operation of the telescopic staircase of the telescopic type according to the above embodiment will be described.

Moving floor stand 1 at each front and back for use as a viewing seat
When ... is sequentially moved forward from the frontmost stage and positioned in a state where it is deployed in a staircase manner, the motor 31 of the drive mechanism 30 is moved by the deployment completion signal and the lock transmission pin 32 is raised by the gear transmission 32. Let As a result, the lock pin 20 projects upward from the state shown by the solid line in FIG. 1, and the head portion 21 penetrates deeply into the engagement hole 42a of the anti-vibration rubber 42 in the receiving frame 41 of the engagement portion 40 as shown by the imaginary line. Raise to the engaging position. At this point, the bulging detection unit 23 at the lower end kicks the upper limit switch 37 to operate, and the detection signal causes the motor 31 to stop and hold the lock pin 20 in the raised position. As a result, the decks 6 of the movable floors 1 ... In the front and rear stages are kept in a linked state by the engagement of the lock pin 20 and the engagement hole 42a of the engagement portion 40.

In this state, the moving floor base 1 tries to sway as the viewer runs around.

Here, since the decks 6 at the front and rear stages are linked to each other by the engagement of the lock pin 20 and the engagement hole 42a, the front and rear stages are not displaced from each other. Moreover, the lock pin 20
Since the engaging hole 42a of the engaging portion 40 which is engaged with is formed of the vibration-proof rubber 42, it is prevented that the vibrations of the upper decks 6 at the front and rear stages propagate to each other and resonate, and Upper deck 6
The shaking and vibration of the are extremely reduced.

At this time, even if an excessive force is applied in the displacement direction between the moving floors 1 at the front and rear stages, the periphery of the anti-vibration rubber 42 in which the lock pin 20 is inserted is covered by the receiving frame 41. Since the vibration damping rubber 42 is prevented from being deformed excessively, the vibration damping rubber 42 can be prevented from falling off or being damaged.

Even if an excessive force that damages the anti-vibration rubber 42 is applied, the lock pin 20 deforms the anti-vibration rubber 42 and contacts the inner surface of the engagement hole 42a, so that the lock pin 20 directly Since the force will be transmitted to the moving floor 1, it is a rubber vibration isolator.
42 does not fall off or break, and a stable vibration propagation reduction effect can be expected.

Moreover, the end portion of the engagement hole 42a on the pin insertion / extraction hole side is provided with the taper hole 4
Since it is set to 2b, the lock pin 20 can be smoothly inserted into the engagement hole 42a using the inner surface of the tapered hole 42b as a guide.

Moreover, since the engagement hole 42a is formed with a diameter larger than the outer diameter of the lock pin 20, even if the position of the engagement hole 42a varies, the lock pin 20 is smoothly inserted into the engagement hole 42a. Like

[Effect of device]

According to the first aspect of the present invention, the propagation of the vibration between the decks can be reduced by the engagement of the lock pin and the engagement hole of the anti-vibration rubber. At this time, the vibration-proof rubber is prevented from being deformed unnecessarily by the receiving frame that covers the periphery of the rubber, so that the vibration-proof rubber will not fall off or be damaged. Moreover, even if an excessive force that damages the anti-vibration rubber acts in the displacement direction between the moving floors, the lock pin deforms the anti-vibration rubber and contacts the inner surface of the engagement hole, Since the force is directly transmitted from the lock pin to the moving floor base 1, the vibration-proof rubber will not fall off or be damaged.

Therefore, a stable vibration propagation reduction effect can be expected, and the effect of suppressing vibration propagation between decks can be stably maintained.

According to the second aspect of the invention, in addition to the above effects, the lock pin can be smoothly inserted into the engagement hole using the inner surface of the tapered hole as a guide.

According to the invention as set forth in claim 3, in addition to the above effect, the lock pin can be smoothly inserted into the engagement hole even if the position of the engagement hole varies.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention, and FIG.
The figure shows a partially cross-sectional view taken along the line II-II in FIG.
FIG. 1 is a side view of the entire telescopic staircase seat as a conventional example. 1 ... moving floor, 6 ... deck, 9 ... view chair, 20 ...
… Lock pin, 30 …… Vertical drive mechanism, 40 …… Engagement part, 41
…… Receiving frame (fixing member), 42 …… anti-vibration rubber, 42a …… engaging hole, 42b …… taper hole.

Claims (3)

(57) [Scope of utility model registration request] 1. A plurality of stages of movable floors each having a deck on which an observer can ride and having different heights are sequentially advanced from the lowermost movable floor during use to develop in stages. At the time of use, in an extended staircase-like pedestal that is retracted sequentially from the foremost moving bed to be stored under each trailing moving bed, above the moving bed and above the unfolded floor. A lock pin that is made to protrude is provided on the lower front end portion of the deck above each moving stage on the rear stage of the lock pin, and an anti-vibration rubber having an engagement hole into which the projecting lock pin is inserted is provided. A fixing member for fixing the vibration rubber to the lower front end portion of the deck is provided, and the fixing member stores the vibration damping rubber from the surroundings by the wall portion and stores the vibration damping rubber inside, and the engagement hole side of the vibration damping rubber. Engaging the engaging hole to the outside on the wall that covers It is composed of a receiving frame having a pin insertion / extraction hole larger than a hole, and when the displacement between the movable floor bases occurs, the lock pin and the inner surface of the pin insertion / extraction hole can be brought into contact with each other. Auditorium. 2. An end portion on the pin insertion / extraction hole side of the engagement hole is formed as a tapered hole whose diameter changes in sequence between the engagement hole and the pin insertion / extraction hole. Telescopic staircase seats. 3. The telescopic staircase according to claim 1, wherein the engagement hole has a diameter larger than an outer diameter of the lock pin.