JPS6361457B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to bleachers for accommodating a large number of spectators in general outdoors such as outdoor stadiums and other outdoor concerts, and particularly relates to bleachers that can be easily set up and removed. The present invention relates to a temporary bleacher system characterized by the following configuration.

[Conventional technology]

When erecting temporary bleachers to accommodate a large number of spectators for outdoor events, other outdoor theaters, and outdoor concerts, the construction has traditionally been done using prefabricated pipe scaffolding, etc., which is mainly used for construction work. is normal.

[Problem that the invention seeks to solve]

However, in order to set up the bleachers using such prefabricated pipe scaffolding, many workers are required to carry in and assemble the equipment, and many auxiliary materials are also required, making the construction process quite time-consuming. The problem was that it took time.

In other words, a large number of personnel were required to bring in and assemble the equipment, as well as to disassemble and remove it after use, and there were major problems, particularly in terms of the speed of assembly and disassembly required for temporary equipment, and the required setup costs.

Therefore, as a means to solve such problems, for example, as seen in the modular space construction device disclosed in Japanese Patent Application Laid-Open No. 51-73739, folding type bleachers or seats equipped with a carrier means and a lift means have been developed. Stairs for spectator seats, etc. have been developed.

However, the modular space configuration device shown in this paper, that is, the seats or stairs for grandstands, has wheels attached to the lower ends of the supporting legs that support them, and the supporting legs are constructed in a foldable format, and the folding of the legs is not possible with a jack. It is configured to perform this using a lift means formed by combining the following.

Therefore, when setting up the structure, the legs must be raised using a lift means to support the heavy seats or the entire staircase for the bleachers, and then moved to a predetermined position on the temporary ground using the wheels provided at the lower ends of the supporting legs. It is now possible to install it by letting it go.

Therefore, regardless of whether the ground of the temporary field, that is, the ground of the temporary field, is firm ground, when setting up outdoors in a place with many uneven surfaces that are not sufficiently leveled, it is extremely difficult to set up by moving to the setting position. Additionally, there were also disadvantages in removing the device after use, such as the wheels sinking into the ground, making it difficult to move.

In other words, the supporting legs that support the bleachers or the stairs for the grandstands, the lift device that opens the legs, and the wheels necessary for movement are attached to the lower end of the supporting legs, so it can be set up very quickly and in a short time at first glance. However, when setting up in a so-called temporary field where the ground of the field is not sufficiently leveled and is extremely uneven, the setting up process is time consuming and temporary bleachers or bleachers cannot be used. It was inadequate for use as a staircase.

SUMMARY OF THE INVENTION Therefore, the present invention has been made with the object of solving such conventional problems and providing a device exclusively for temporary bleachers, which is particularly easy to set up and take down, and which can be done in a short period of time. It is ivy.

[Means for solving problems]

Therefore, as a means for achieving the above object, the present invention has the following features: (1) In the case of a single or a plurality of seats installed at an angle connected to each other along the inclination direction, each seat is Attach fixed legs to both ends. Three connecting rods are sequentially connected to the lower end of one or both of the fixed legs, one end of a link member consisting of two nodes is pivoted, and the other end is attached to the fixed leg. Pivotally attached to the bottom of the bleachers inside the position.

Further, one end of a guide link member having a linear sliding groove in the axial direction is coaxially and pivotally connected to a pivot joint of a link member pivotally connected to the lower end of the fixed leg, and the sliding groove is One node of the link member is slidably engaged, and a ground shoe is rotatably attached to the other node. Then, when the nodes engaged with the sliding grooves of the guide link members are moved along the sliding grooves, the entire structure is constructed into a temporary bleacher system equipped with folding legs made of a link mechanism that folds into a dogleg shape. be.

(2) Furthermore, when the folding legs made up of the link mechanism are bent and extended to support the load of the bleachers via the shoe, the node position that engages with the sliding groove of the guide link pivots to the lower part of the bleachers. A folding leg made of a link mechanism in which the length of the guide link member and the length of the sliding groove are regulated so that the length of the guide link member and the length of the sliding groove are regulated so that they are located inside the straight line connecting the fulcrum of the link member that is attached to the ground and the node of the link member that is attached to the shoe for grounding. This is because it was configured as follows.

(3) Furthermore, the folding leg made of the link mechanism is constructed with a locking device for restraining folding.

[Effect]

As described above, the temporary bleacher seat device according to the present invention has the folding legs made of the link mechanism attached to one or both ends of the bleachers, a rotatable shoe attached to the ground contact part of the legs, and the folding legs Since the locking device is installed in the unit, the following operational effects can be achieved.

First, the legs that support the bleachers are constructed by assembling fixed legs and folding legs made up of link mechanisms, so the folding legs are locked in the folded state, and a lift device (described later) is installed on the bottom of the center of the bleachers. The whole thing can be lifted up and transported by using a transport vehicle equipped with it.

In other words, the bleachers can be transported anywhere as a single unit.

After transporting the vehicle to a predetermined setting position, the lift device mounted on the transport vehicle is lowered and the grounding shoe is rotated to release the locking device that restrains the folding legs consisting of a link mechanism from being folded. If you turn up the car lift device,
The folding legs, which are made up of a link mechanism, automatically extend under their own weight to support the bleachers. Therefore, the setup can be completed extremely easily.

At that time, the installation position of the spectator seats can be freely determined by handling the transport vehicle and operating the lift device.
Therefore, the setting position can be adjusted in a very appropriate manner.

If you wish to remove it, simply follow the above procedure in reverse. That is, the temporary bleacher system according to the present invention is characterized in that it can be set up and removed extremely easily and quickly.

〔Example〕

Next, the present invention will be explained in more detail based on examples. Fig. 1 shows the bleachers according to the present invention divided into two units, a lower bleacher 1 and an upper bleacher 2, which are connected with connecting pins 3 that are easily detachable and set up in an inclined manner. ing. Fixed legs 4 are installed at both the left, right, top and bottom ends of the upper bleachers 2, respectively.
5 is fixedly installed, and one side of the fixed legs 4 and 5, the first
A folding leg 6 consisting of a link mechanism is attached to the fixed leg 5 on the left side as shown in the figure.

7 is a transport vehicle for bleachers 1 and 2. This carrier 7 has a pantograph 7b on a chassis 7a.
This is a transport vehicle equipped with a lift device and has a horizontal floor 7c supported by a horizontal floor 7c. In other words, the pantograph 7b is configured as a lift device-type transport vehicle that moves the pantograph 7b up and down using hydraulic pressure. Furthermore, a support arm 7d is engaged with the horizontal floor 7c so that it can be tilted in the directions of arrows A and B by hydraulic pressure.

In other words, it is configured to function as a dedicated transport vehicle for grounding the lower seats 1 and the upper seats 2 at predetermined positions, respectively, or for removing them.

In Fig. 1, reference numerals 8 and 9 are rotatable shoes, which are attached to the ground contact portions of the fixed leg of the lower seating 1, the right fixed leg 4 of the upper seating 2, and the folding leg 6 on the left side, respectively. It is.

Next, based on FIG. 2, the fixed leg 5 on the left side of FIG.
Folding leg 6 consisting of a ring mechanism assembled on the side
The configuration and operation of the system will be explained.

First, the folding legs 6 made of this link mechanism
As shown in the figure, three connecting rods 6a, 6e, 6c
The upper end of the first connecting rod 6a is connected to the lower end of the fixed leg 5 by a support shaft 6b.
The third connecting rod 6c is rotatably pivoted with the rear end of the third connecting rod 6c inside the mounting position of the fixed leg 5,
In FIG. 2, the fixed leg 5 is rotatably supported at the lower part of the upper audience seat 2 on the right side by a support shaft 6d.

Next, a guide link member 6h having a linear sliding groove 6i is provided, and this guide link member 6h
The base end of the support shaft 6b is attached to the lower end of the fixed leg 5.
is pivotally mounted as a common support shaft, and the sliding groove 6i
Then, the connecting shafts 6g forming the node F between the second connecting rod 6e and the third connecting rod 6c in the connecting rods 6a, 6e, 6c are engaged, and the supporting shafts 6b and 6d are connected to the supporting points C and D. It is configured with a link mechanism.

Further, a rotatable grounding shoe 9 is attached to the connecting shaft 6f forming a node E between the connecting rods 6a and 6e as a common axis, and the whole structure is configured into a foldable leg 6. There is.

In addition, in the embodiment, when the folding leg 6 made of the link mechanism is extended as a whole and supports the upper spectator seat 2 as shown in FIG. connecting rod 6
The position of the connection point with c, that is, the position of the node F, connects the node E of the first connecting rod 6a and the second connecting rod 6e and the fulcrum D of the third connecting rod 6c on the upper seating 2 side E'-
The lengths of the connecting rods 6a, 6e, 6c and the positions of the fulcrums C and D are set so that they are located on the right side of line D'.

That is, when the load of the upper seating area 2 acts on the folding leg 6, a moment K about the node E acts on the connecting rod 6e of the link mechanism forming the folding leg 6, and the node F is always The folding leg 6, which is held on the right side of the '-D' line and can support the load of the upper seating area 2, is configured as a link mechanism that can stably support the load as a supporting leg.

Next, a locking device, which is a means for restraining the folding of the folding leg 6 made of the link mechanism, will be explained. First, as shown in FIG. 2, insertion holes 6j and 6k for the stopper pins 6l are bored near the front end of the sliding groove 6i of the guide link member 6h and near the bottom end of the first connecting rod 6a, respectively. When restraining the folding legs 6 in the extended state, insert the stopper pin 6l into the insertion hole 6j, and conversely, when restraining the folding legs 6 in the folded state, insert the stopper pin 6l into the insertion hole 6k. It is configured so that it can be locked.

The stopper pin 6l is suspended from the upper bleachers 2 with a chain 6n, and the chain 6n
The length of the folding leg 6 is regulated to a length that allows the folding leg 6 to be inserted into the insertion hole 6j in the state shown in FIG. If you insert
The chain 6n is also long enough to suspend the folding leg 6. Note that 6m is a stopper pin 6l to prevent it from coming off.

Normally, this upper bleacher seat 2 is used in the installed state shown in FIG. 1, but next we will explain how to move it.

In this embodiment, the lower bleacher seat 1 and the upper bleacher seat 2 are connected, so first, the stopper pin 6l of the locking device that restrains the folding operation of the connecting pin 3 and the folding legs 6 is pulled out from the insertion hole 6j. Then, as shown in FIG. 3, the hydraulic system (not shown) of the carrier vehicle 7 is operated to raise the horizontal floor 7c supported by the pantograph 7b. At the same time, the tilting of the support arm 7d in the directions of arrows A and B is adjusted so that the support arm 7d is brought into contact with the bottom surface of the upper bleacher seat 2, and the weight of the upper bleacher seat 2 is supported by the carrier vehicle 7.

When the lifting height of the transport vehicle 7 is further increased, the weight of the upper seats 2 is no longer applied to the folding legs 6, and the folding legs 6 become in a so-called floating state.
c is suspended from the support shaft 6d (the third
(See figure) It becomes almost a straight line.

Next, as shown in Figure 4, mark the link mechanism with the arrow L.
When a force is applied in the direction, connecting rods 6c and 6e are not under any load, so they easily move arrows J' and 6e.
The connecting shaft 6 is rotated in the K' direction, that is, folded in.
g (node F shown in FIG. 2) approaches fulcrum C.

Subsequently, as shown in FIG. 5, when the horizontal floor 7c and support arm 7d of the transport vehicle 7 are lowered, the weight of the upper bleachers 2 is applied to the folding legs 6, so the connecting rods 6e and 6c are automatically moved. When folded up, the upper seating area 2 is supported by fixed legs 4 and 5 as shown in FIG.

When the folding leg 6 is folded and stored in the posture shown in FIG. 6, the stopper pin 6 shown in FIG.
1 into the insertion hole 6k. Then, the folding leg 6 is locked in the same state by the chain 6n, and assumes the shape shown in FIG.

Next, when the horizontal floor 7c of the transport vehicle 7 is moved upward horizontally as shown in FIG. 6 leaves the ground. Therefore, in this state, the upper seating area 2 can be freely moved to any desired location by the transport vehicle 7.

In addition, as shown in FIG. 8, the lower seating area 1 allows the transport vehicle 7 to enter under the lower seating area 1,
As shown in FIG. 9, by raising the horizontal floor 7c, it can be moved to a desired location.

The temporary bleacher system according to the present invention includes the transport vehicle 7.
By using this, it can be quickly transported to a temporary location and set up easily. Incidentally, the maximum ground height H during transportation of the upper bleachers 2 shown in Figure 7 is lower than the ground height H' during installation shown in Figure 1, so gates, entrances, and electrical cables may be removed during transportation. There is no risk of interference with aerial obstacles such as

Furthermore, in the transportation position shown in FIG. 7, the center of gravity of the upper seating area 2 is lower than in the installation position shown in FIG. 1, so that the transportation is stable and safe.

To extend the folding legs 6 of the upper bleachers 2 again after transportation to the installation position shown in Figure 1, remove the stopper pin 6l and reverse the folding and storage operation described above from the state shown in Figure 6. By raising the horizontal floor 7c of the transport vehicle 7, the state shown in FIG. 5 can be changed to the state shown in FIG. 3. During this time, the folding legs 6 extend due to their own weight without requiring any special human effort.

When the state shown in FIG. 3 is reached, a force is applied to the connecting rod 6e of the link mechanism that constitutes the folding leg 6 in the direction of arrow L' as shown in FIG.
This time, the horizontal floor 7c is lowered. Then, the folding legs 6 automatically assume the posture shown in FIG. As a result, as explained earlier based on FIG.
It is stabilized by being pressed against the end of the sliding groove 6i, that is, the right end.

Therefore, in the installed state, it is not necessarily necessary to apply a locking device for restraining the folding of the folding legs 6. However, as shown in Figure 2, if the stopper pin 6l that forms the locking device is inserted into the insertion hole 6j, the folding operation of the link mechanism will be restricted, making it extremely safe even when subjected to strong wind pressure such as a typhoon. It is.

Next, when the upper seating area 2 and the lower seating area 1 are installed as shown in FIG. Shoes 9, 8, and 8 are rotatably attached to the ground contact parts of the fixed legs of the lower bleachers 1, so even if the ground surface is slightly uneven, or if the ground surface is slightly soft or Even if the seats are weak, the seats can be firmly supported without the legs sinking into the ground or damaging the ground surface.

FIG. 10A shown in the drawings shows another example of how the upper bleachers 2 shown in FIGS. 1 and 2 are used, and is grounded in close contact with the concrete wall surface 10 around the ground. The folding legs 6' of the upper bleachers 2' are constructed with a link mechanism similar to that shown in FIGS. 1 and 2. 8' and 9' are shoes for grounding.

In the embodiment shown in FIG. 10A, an entrance/exit 11 is provided in the concrete wall surface 10, and a connecting corridor 12 is constructed to connect the entrance/exit 11 and the upper seating area 2'. This connecting corridor 12 has a structure that can be bent and rotated around a support shaft 13 so as not to get in the way when the folding legs 6' are folded and stored.

Next, FIG. 10B is an enlarged detailed view of the shoe 9', which has a ground plate 9'a at the lower end, and a stay 9'b erected at the center of the ground plate 9'a. It is rotatably mounted by a connecting shaft 9c to a connecting portion between connecting rods 6'a and 6'e of a link mechanism that constitutes a leg by folding the upper end of the leg.

Furthermore, wheels 9'd are pivotally supported on the connecting shaft 9c, and when the ground plate 9'a is reversed 90 degrees as shown by the imaginary line, the wheels 9'd touch the ground and function as running wheels. It's getting old.

By attaching the wheels 9'd in this way, they not only function as running wheels, but also allow the folding legs 6 to be folded and extended smoothly in locations where the ground is rough.

Furthermore, when the device according to the present invention is used on relatively uneven ground, it is preferable that the shoe 9' be of a turnbuckle type that can be expanded and contracted.

FIG. 10C shows an embodiment in which the shoe 9' is configured in a turnbuckle type. Its structure is to divide the stay 9''b, which corresponds to the stay 9'b shown in FIG.
A left-handed female thread is drilled in the lower stay 9″b-2, and a male thread 9″ is screwed into both sides.
By screwing in the adjustment screw 9''b-5 having upper and lower adjustment screws 9''b-3 and 9''b-4, and rotating the adjustment screw 9''b-5, it is possible to perform expansion and contraction adjustment using a so-called turnbuckle method. .

Next, a specific embodiment of the transport vehicle 7 shown in FIG. 1 will be described based on the front view of FIG. 11, the side view of FIG. 12, and the plan view of FIG. 13.

The transport vehicle is provided with a backbone chassis 7E at the center over its entire length, and two axle chassis 7F, 7F' shown in FIG. The whole structure is supported by wheels 7G...7G pivotally supported at each end.

Reference numeral 7H is a hydraulic steering device for rotating wheels 7G by 90 degrees around a steering shaft 7H-1, which utilizes the vehicle steering device disclosed in Japanese Patent Publication No. 52-2168.

An engine 7I or a hydraulic power source device 7J is mounted on both ends of the backbone chassis 7E.

Front view (Fig. 11) and plan view (Fig. 13)
The chassis 7A shown in FIG.
It corresponds to the chassis 7a in the figure, and supports a horizontal floor 7C via a pantograph 7B.

The support arm 7D is attached to the horizontal floor 7C via a short link 7K. That is, one end of the short link 7K is rotatably attached to the horizontal floor 7C by a shaft 7K-1, and the other end is rotatably attached to the support arm 7D by a shaft 7K-2. Further, it can be rotated in the directions of arrows M and N by a hydraulic cylinder 7L.

In addition, the hydraulic cylinder 7P is connected to the shaft 7P-1 and the shaft 7.
P-2 to the horizontal floor 7C and the support arm 7D, and the support arm 7D is tilted in the directions of arrows A and B about the shaft 7K-2 by the expansion and contraction movement of the hydraulic cylinder 7P. It's summery. Furthermore, the pantograph 7B is configured to be extended and contracted by a hydraulic cylinder 7Q, as shown in FIG. That is, when the rod of the hydraulic cylinder 7Q is extended, the pantograph 7B changes from the position shown by the solid line to the position 7B' shown by the imaginary line, and the horizontal floor 7C on which it is supported changes from the position shown by the solid line to the position 7B shown by the imaginary line.
It is now possible to lift it to the C′ position. Along with this, the support arm 7D attached to the horizontal floor 7C is also lifted from the illustrated position 7D' to the illustrated position 7D''.

〔Effect of the invention〕

As explained above, the temporary bleacher system according to the present invention can be easily carried into and out of a temporary location, and in particular, the folding legs that support the bleachers are configured with a link mechanism, so that during construction The work is extremely easy.

Furthermore, if a transport vehicle equipped with the above-mentioned lift device is prepared for use in carrying in and out, there is an effect that setting up and removal can be done quickly.

That is, if the transport vehicle 7 is configured as described in the above embodiment, the following effects can be expected in carrying in, setting up, removing, etc. the temporary bleacher system according to the present invention.

A backbone chassis 7E is provided perpendicularly to the axle chassis 7F, and a chassis frame 7 is attached to this.
By constructing the chassis frame A, the chassis frame 7A can be placed at a low position without interfering with the wheels 7G and the steering device 7H. As a result, the support arm 7 of the carrier
Since the height H'' above the ground at the lowest point of D is lower, it is easier to enter the space below the bleachers.

The support arm 7D can be operated in three ways: vertical movement by the hydraulic cylinder 7Q, vertical tilting in the directions of arrows A and B by the hydraulic cylinder 7P, and overall width shifting movement in the directions of arrows M and N by the hydraulic cylinder 7L. Yes, by these operations the support arm 7
It is easy to evenly bring D into close contact with the lower surface of the upper bleacher 2 or the lower surface of the lower bleacher 1.

The wheels 7G can rotate 90 degrees around the steering shaft 7H-1 without interfering with the vehicle body or engine, so the vehicle can be driven straight ahead with the lower seats 1 or the upper seats 2 loaded, or immediately transversely at right angles thereto. or turn on the spot,
This not only allows for freedom of movement during transportation, but also facilitates the work of connecting and assembling a plurality of seats 1 and 2.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1 is a side view showing the configuration of the device of the present invention, and FIG.
The mechanism shown in the figure is an enlarged view of the main parts of the folding legs. Figures 3, 4, and 5 are side views showing the folding legs in the extended and retracted state. Figure 6 shows the folding legs in the folded and stored state. Side view, Figure 7, Figure 8 and Figure 9 are side views showing the transportation state, Figure 10.
Figure A is a side view showing another embodiment of the upper seating area, Figure 10B is an enlarged structural view of the main part of the shoe in Figure 10A, and Figure 10C is a side view showing another embodiment of the shoe in Figure 10A. Fig. 11 is a front view showing an embodiment related to a transport vehicle;
2 is a side view, and FIG. 13 is a plan view. 1... Lower bleachers, 2... Upper bleachers, 3...
Connecting pin, 4, 5...Fixed leg, 6...Folding leg, 6a, 6e, 6c...Connecting rod, 6f, 6g...
...Connection shaft, 6b, 6d... Support shaft, 6i... Sliding groove, 6h... Guide link member, 6l... Stopper pin, 6j, 6k... Insertion hole, 6n... Chain,
6m...Retainer, 7...Transporter, 7a, 7A...
...Shiashi, 7b, 7B...Pantograph, 7
c, 7C...Horizontal plate, 7d, 7D...Support arm, 7
F...Axle chassis, 7G...Wheels, 7H...Steering device, 7K...Short link, 7K-1,
7K-2...Shaft, 7L, 7P, 7Q...Hydraulic cylinder.

Claims (1)

[Scope of Claims] 1. In a bleacher seat in which a single or a plurality of bleacher seats installed at an angle are connected and installed along the inclination direction, fixed legs are attached to both ends of each bleacher seat, One end of a link member consisting of two nodes is pivotally connected to the lower end of one or both of the fixed legs by sequentially connecting three connecting rods,
The other end of the guide link member is pivotally connected to the lower part of the bleachers inside the mounting position of the fixed leg, and the guide link member has a linear sliding groove in the axial direction.One end of the guide link member is attached to the fixed leg of the link member. one node of the link member is slidably engaged with the sliding groove, a ground shoe is rotatably attached to the other node, and the A temporary spectator seat device having folding legs made of a link mechanism that is folded into a dogleg shape as a whole when a node engaged with a sliding groove of a guide link member is moved along the sliding groove. 2. When the folding legs made of the link mechanism are flexed and extended to support the load of the bleachers via the shoe,
The position of the node that engages with the sliding groove of the guide link is located inside a straight line connecting the fulcrum of the link member pivoted to the lower part of the audience seat and the node of the link member to which the ground shoe is attached. 2. The temporary seating system according to claim 1, comprising folding legs made of a link mechanism in which the length of the guide link member and the length of the sliding groove are regulated. 3. The temporary spectator seat system according to claim 1, wherein a locking device for restraining folding is assembled to the folding leg made of the link mechanism.