Movable seating

Abstract

The present invention provides moving spectator-stands capable of being selectively deployed at a normal use position and a shortened use position by simple operations. Moving spectator-stands (100) include a plurality of levels of floor bases (10) and a plurality of leg parts (30) that support each of the floor bases (10) so as to be horizontal and movable in a front-back direction. Each leg part (30) includes a first stopper (34) that engages with the leg parts (30) of adjacent floor bases (10) thereby enabling that floor base (10) and the floor base (10) one level below to move forward interlocked in a state offset in a stair-like manner; and a second stopper (50) that, with some of the plurality of the floor bases (10) bundled as a set of vertically aligned floor bases (10), enables such sets of floor bases (10) to move in an interlocked manner. The moving spectator-stands (100) are movable when at any position from among a storage position in which all of the floor bases (10) are aligned vertically, a normal use position in which the floor bases (10) are individually deployed in a stair-like manner, or a shortened use position in which sets of floor bases (10) are deployed in a stair-like manner.

Description

[Technical field]

[0001] The present invention relates to a movable spectator seat, and more specifically to a movable spectator seat having multiple stages that can be moved back and forth in conjunction with each other between a use position in which the stage is generally deployed in a stepped manner and a storage position in which the stage is generally aligned vertically. [Background technology]

[0002] Conventionally, movable spectator seats are known that can move back and forth in conjunction with each other between a usage position in which multiple tiers of platforms are deployed in an overall stepped manner and a storage position in which the platforms are generally aligned vertically.

[0003] The movable spectator seating in Patent Document 1 comprises multiple stages of platforms, linked chairs mounted on each platform and consisting of multiple chairs connected side by side, and legs that support each platform horizontally so that it can move forward and backward and engage with each other to link the platforms. The legs comprise multiple support columns whose upper ends are respectively connected to multiple parts of the platform spaced apart in the left-right direction and extending downward from the platform, and a base that is connected to the lower ends of each support column and extends in the front-to-rear direction.

[0004] The movable spectator seats in Patent Document 1 are equipped with flat stoppers at the front ends of the bases of each leg connected to the floor platforms other than the lowest one, and by engaging these with supports connected to the floor platform one level below, they move in unison and are deployed into their usage position.

[0005] In addition, the movable spectator seating in Patent Document 1 allows the attachment position of the stopper to the base to be changed. By changing the engagement position between the stopper and the support, the seating can be deployed to a shortened use position where a portion of the multiple tiers of platforms are aligned vertically and the length in the front-to-rear direction is shortened. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] International Publication No. 2016 / 139792 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the movable spectator seats of Patent Document 1, in order to deploy them to the shortened use position, the installation position of the stoppers, which are attached by screws or the like, must be changed each time, making the work complicated.

[0008] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a movable spectator seat that can be selectively deployed with a simple operation between a normal use position in which the platform is deployed step-by-step in a staircase-like manner, and a shortened use position in which some of the multiple platform steps are aligned vertically and the length in the front-to-rear direction is shortened. [Means for solving the problem]

[0009] In order to achieve the above object, one embodiment of the present invention provides a movable spectator seating structure comprising: a plurality of tiers of platforms; columns supporting the platforms horizontally; and a plurality of legs each having a base extending in the front-rear direction at the lower end of the columns and movable in the front-rear direction; the legs each comprising a first stopper that engages with the column of a platform one level below the platform supported by the legs, allowing the platform and the platform one level below to move forward in conjunction with each other while being offset in a staircase-like manner; and a second stopper that vertically aligns a portion of the plurality of tiers of platforms as a set, allowing the set of platforms to move in conjunction with each other; the platform is A movable spectator seating arrangement that can be moved between a storage position in which the platforms are generally aligned vertically, and a normal use position in which the platforms are deployed in a stepped manner one step at a time, or a retracted use position in which the groups of platforms are deployed in a stepped manner, wherein the legs of a first platform constituting each group are equipped with a second stopper body as the second stopper, the second stopper body having an interference member configured to protrude and be retracted toward the legs of a second platform constituting each group, and the legs of the second platform are equipped with a stopper stopper that interferes with the interference member when moved forward to link the first platform and the second platform.

[0010] In the above aspect, it is also preferable that the stopper holder has a contact portion that contacts the interference member when the stopper holder advances, and that the protruding length of the contact portion is adjustable.

[0011] In the above aspect, it is also preferable that the second stopper is provided behind the support pillar.

[0012] In addition, in the above aspect, it is also preferable that the second stopper body is provided with a regulating portion that regulates movement toward the protruding position when the interference member is in the stored position, and movement toward the stored position when the interference member is in the protruding position.

[0013] In the above aspect, it is also preferable that the restricting portion restricts movement of the interference member from the stored position toward the protruding position by being biased by an elastic member.

[0014] In the above aspect, it is also preferable that, in a storage position, the interference member extends in a front-rear direction of the leg, and moves from the storage position to the protruding position by a rotational movement about an axis extending in a vertical direction.

[0015] In addition, in the above aspect, it is also preferable that the interference members are arranged so as to be aligned in the left-right direction when the movable spectator seats are in the stored position, and that in the stored position, the interference members are provided with a deployment restricting portion that protrudes in the opposite direction to the protruding direction of the interference members when the interference members are in the protruding position, thereby restricting the movement of adjacent interference members, and that the deployment restricting portion is stored within the lateral range of the leg when the second stopper is in the stored position. Effect of the Invention

[0016] With the movable spectator seating of the above-described embodiment, by simply switching between extending and retracting the interference member of the stopper provided on the leg, the movable spectator seating can be deployed between a normal use position and a shortened use position in which the length in the fore-and-aft direction is shortened and at least some of the multiple tiers of platforms are aligned in the vertical direction. [Brief description of the drawings]

[0017] [Figure 1] 1A is a side view of a movable spectator seat in an embodiment of the present invention, FIG. 1B is a side view of the seat in the retracted position, and FIG. 1C is a side view of the seat in the normal position. [Diagram 2] 1A is a plan view of the movable spectator seating in the stowed position, FIG. 1B is a plan view of the retracted position, and FIG. 1C is a plan view of the normal position. [Diagram 3] FIG. 2 is a partial perspective view of the movable spectator stand in its normal use position. [Figure 4] 13A, 13B, and 13C are diagrams showing the connecting chairs installed on each platform of the movable spectator seating, where (A) is a plan view, (B) is a front view, and (C) is a side view. [Diagram 5] (A) is a plan view of the legs connected to the second platform of a set of platforms that are aligned vertically in the shortened use position of the movable spectator seats, (B) is a front view of the same, and (C) is a left side view of the same. [Figure 6] 1A is a plan view of a leg connected to the first platform of a set of platforms that are aligned vertically when the movable spectator seating is in the shortened use position, FIG. 1B is a front view of the same, and FIG. [Figure 7] 13 is a perspective view of a stopper pad provided as a second stopper on the leg of the movable spectator stand. FIG. [Figure 8] 13A is a perspective view of a second stopper body provided as a second stopper on the left leg of the movable spectator stand in a stored state, as viewed from the left, and FIG. 13B is a perspective view of the second stopper body as viewed from the right. [Figure 9] 13A is a perspective view of the second stopper body in a stored state with the restriction bar released, as viewed from the left, and FIG. 13B is a perspective view of the second stopper body in a stored state with the restriction bar released, as viewed from the right. [Figure 10] 13A is a perspective view of the second stopper body in an expanded state with the restriction bar released, as viewed from the left, and FIG. 13B is a perspective view of the second stopper body in an expanded state with the restriction bar released, as viewed from the right. [Figure 11]13A is a perspective view of the second stopper body in an expanded state as viewed from the left, and FIG. 13B is a perspective view of the second stopper body as viewed from the right. [Figure 12] 13 is a plan view illustrating a protruding state of the second stopper body when the movable spectator seat is in the stored position. FIG. [Figure 13] 13 is a perspective view illustrating the details of the movement of the legs when the movable spectator seat is deployed from the storage position to the normal use position. FIG. [Figure 14] FIG. 13 is a plan view for explaining the movement of the entire left leg during the unfolding movement. [Figure 15] 13A to 13C are diagrams illustrating the movement of the legs when the movable spectator seats are deployed from the stored position to the shortened use position. [Figure 16] FIG. 13 is a plan view for explaining the movement of the entire left leg during the unfolding movement. [Figure 17] 13A and 13B are side views of the movable spectator seats when they are in a shortened use position after being deployed in a different state. [Figure 18] 1A and 1B are diagrams illustrating the mounting structure of the second stopper of a movable spectator seating according to one modified example of the present embodiment, in which (A) is a left side view showing the second stopper body attached to the leg connected to the first floor base, (B) is a left side view showing the stopper pad attached to the leg connected to the second floor base, and (C) is a plan view showing the protruding state of the second stopper body. [Figure 19] 11A and 11B are diagrams illustrating the mounting structure of the second stopper of a movable spectator seating arrangement according to yet another modified example of the present embodiment, in which (A) is a left side view showing the second stopper body attached to the leg connected to the first floor base, (B) is a left side view showing the stopper pad attached to the leg connected to the second floor base, and (C) is a plan view showing the protruding state of the second stopper body. [Figure 20] FIG. 13(A) is a perspective view of a second stopper in a stored state of a movable spectator seat according to yet another modified example of the present embodiment, and FIG. 13(B) is a perspective view of the second stopper in the extended state. [Figure 21] 13A to 13C are diagrams illustrating the operation of the legs moving from the stored position to the retracted use position in this modified example. [Figure 22]13A is a perspective view showing a second stopper body according to still another modified example of the present embodiment in a stored state, and FIG. 13B is a perspective view showing the same in a protruded state. [Figure 23] 10A to 10C are diagrams illustrating the configuration and operation of a second stopper according to the modified example. [Figure 24] 10A to 10C are diagrams illustrating the configuration and operation of a second stopper according to the modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The movable spectator seating 100 according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings. Note that the following embodiment is merely an example, and the present invention is not limited thereto. In addition, in the following description of the embodiment and modified examples, the same components are given the same reference numerals, and duplicated descriptions will be omitted as appropriate.

[0019] In this specification, the front of the movable spectator seating 100 refers to the direction in which the multiple tiers of the platform 10, which are laid out like a staircase, become lower, the "rear" refers to the direction in which they become higher, the "left direction" refers to the left when facing forward, and the "right direction" refers to the right when facing forward. In each figure, the front is indicated by the arrows F, the rear by B, the left by L, the right and R, the upper by U, and the lower by D.

[0020] In addition, the lowest stage of the bed platforms 10 is called the first stage bed platform 10, and the stages are counted in ascending order upwards, such as the second stage bed platform 10, the third stage bed platform 10, etc.

[0021] Furthermore, in each drawing, reference numerals indicating multiple identical components will be omitted as necessary.

[0022] The movable spectator seat 100 according to this embodiment is installed on the floor surface Fl of indoor stadiums, various halls, theaters, etc., and is used as spectator seats.

[0023] As shown in Figures 1 and 2, the movable spectator seating 100 generally comprises a number of platforms 10, linked chairs 20 consisting of a number of chairs 21 connected side-by-side and placed on each platform 10, legs 30 which support each platform 10 in a horizontal state so that they can move forward and backward and also engage the platforms 10 together to link them, and fixing parts 40 for fixing the platforms 10 to an installation position within a wall or the like.

[0024] The number of bed bases 10, the number of linkable chairs 20 arranged on one bed base, and the number of chairs 21 provided on one linkable chair 20 can be changed as necessary regardless of the illustrated example.

[0025] As shown in Figure 3, each floor base 10 comprises a cross member 11 extending horizontally in the left-right direction of the movable spectator seating 100, a floor material 12 whose rear end is supported on the underside of the cross member 11 and extends horizontally in front of the cross member 11, and two pairs of vertical beams 16 arranged at intervals in the horizontal direction of the floor base 10 and extending horizontally forward from the lower end of the cross member 11.

[0026] As shown in Fig. 4, the linked chair 20 is configured such that a plurality of chairs 21 are supported by a base 24 so as to be able to rise and fall via connecting pipes 22 and legs 23. Moreover, as shown in Figs. 4(B) and 4(C), the chairs 21 are seat-stand type chairs configured so that the seat surface 21a can rise.

[0027] In addition, the connecting chair 20 is driven by a motor-driven chair raising / lowering device (not shown) and is capable of swinging between an upright position for use and a forward-folded storage position as shown by the dashed line in FIG. 4(C).

[0028] 3, the legs 30 include a pair of left and right support columns 31 and a pair of left and right bases 32 connected to the lower ends of the support columns 31. The support columns 31 are connected to the back surface of the beam member 11 and extend vertically downward. The base 32 has a columnar shape with approximately the same width as the support columns 31, the support columns 31 are fixed to its middle portion, and the base 32 extends in the front-to-rear direction of the movable spectator stand 100.

[0029] As with the vertical beams 16, the support pillars 31 and bases 32 are not limited to one pair, but may be provided in multiple pairs depending on the left-right dimension of the movable spectator stand 100. The structure of the base 32 will be described later.

[0030] The legs 30 are provided with diagonal braces 36 that extend obliquely from near the base end of the support pillars 31 at each base 32 toward the inside of the beam members 11 and the movable spectator seats 100. The diagonal braces 36 form pairs corresponding to the support pillars 31. The upper ends of the diagonal braces 36 are connected to the back faces of the beam members 11. In this way, the legs 30 support the deck 10 in a cantilever fashion.

[0031] The columns 31 are longer by the step length from the column 31 connected to the first stage stool 10 toward the rear. The horizontal distance between each pair of columns 31 gradually narrows from the column connected to the top stage stool 10. In the retracted position of the movable spectator seating 100 shown in FIG. 1(A), the columns 31 connected to adjacent stages 10 are arranged in parallel in the horizontal direction. As a result, the distance between each pair of bases 32 connected to each column 31 also gradually narrows from the column connected to the top stage.

[0032] As shown in Figures 1(A) to 1(C), the fixed portion 40 includes a fixed member 44 extending along the base 32, a fixed pillar 43 extending downward from the rear end of the fixed member 44, a fixed beam 42 fixed to the fixed pillar 43 above the fixed pillar 43 and extending in the front-to-rear direction parallel to the fixed member 44, a chair-less top floor base 41 supported on the topmost floor base 10 via the fixed pillar 43, and a rear wall 45 erected at the rear end of the chair-less top floor base 41.

[0033] The fixed support 43, the fixed member 44, and the top floor base 41 define a storage space S of the movable spectator seat 100. In addition, a first stopper 34 provided on the base 32 described later is attached to the front end of the fixed member 44 in the same manner as the attachment to the base 32 shown in FIGS.

[0034] The movable spectator seating 100 can be selectively set between a stored position shown in Figures 1(A) and 2(A), a reduced use position shown in Figures 1(B) and 2(B), or a normal use position shown in Figures 1(C) and 2(C). In the stored position, the multiple tiers of platform 10 that make up the movable spectator seating 100 are generally aligned vertically. On the other hand, in the normal use position, the multiple tiers of platform 10 are deployed, shifted one tier at a time in a staircase-like manner.

[0035] In the shortened use position, some of the bed bases 10 are arranged in pairs of bed bases aligned vertically, and are deployed in a staircase-like manner overall. In the illustrated example, from the second tier onwards, adjacent bed bases 10 are aligned vertically in pairs of two tiers, such as the second and third tiers, the fourth and fifth tiers, etc., and each pair of bed bases 10 is deployed in a staircase-like manner overall. As a result, in the shortened use position, the length in the front-rear direction is shorter than in the normal use position.

[0036] The movable spectator seating 100 is equipped with a platform drive device (not shown) on the floor surface Fl of the storage space S. The platform drive device drives a drum in forward and reverse rotation using a motor with a brake, and functions to pay out a belt-like chain with wheels on each connecting piece wound around the drum when the drum rotates forward, and to wind up the belt-like chain on the drum when the drum rotates reversely.

[0037] The tip of the belt-shaped chain is connected to the first stage bed 10. The bed drive device moves the first stage bed 10 in the front-rear direction by unwinding and winding the belt-shaped chain. As a result, the first stage bed 10 and all the multiple stages of beds 10 that are directly or indirectly engaged with each other via its legs 30 can move in the front-rear direction.

[0038] Next, a detailed configuration of the base 32 will be described with reference to Figures 5 and 6. The structure of the pair of left and right bases 32 respectively coupled to the pair of left and right support columns 31 is symmetrical as shown in Figure 3. In the following explanation, the L-side base 32 will be described, and an explanation of the R-side base 32 will be omitted.

[0039] The base 32 includes a base 321 connected to the first stage bed base (hereinafter referred to as the "first stage base") and a base 322 connected to the lower stage bed base 10, which is the second bed base, of the two bed bases 10 that form a pair aligned vertically in the shortened use position (hereinafter referred to as the "lower stage base"). l and a base 32 (hereinafter referred to as the "upper stage base") connected to the upper stage bed 10, which is the first bed base. u The configuration is different.

[0040] Base 32 l ,32 u The legs 30 are generally U-shaped in cross section, opening downwards, and are made of long steel material extending in the front-rear direction. A number of running rollers 33 are attached in series to the opening. This allows the legs 30 to move in the front-rear direction while being supported horizontally by the bed 10.

[0041] Base 32 l ,32 u A stopper attachment hole (not shown) is provided on the front end upper surface of the base 32, and a plate-shaped first stopper 34 is screwed to the stopper attachment hole (not shown). l ,32 u The protruding portion 34a is attached to the base 32 so as to protrude in the R direction. l ,32 u The first stopper 34 is bent in the middle in the left-right direction so that the protruding portion 34a is positioned higher than the mounting portion 34b.

[0042] Also, base 32 l ,32 u On the lower end L side of the support 31, an engagement member 35 having a downward claw 35a at its front end and a lever-shaped release portion 35b is provided so as to be freely swingable up and down around a rotation shaft 35c, as shown by the double arrow in Figures 5(C) and 6(C).

[0043] Bottom row base 32 l A stopper pad 51 is provided as a second stopper 50 on the upper surface of the rear end portion of the holder 51 .

[0044] As shown in FIG. 7, the stopper 51 is attached to the base 32. l The mounting portion 52 is made of a channel steel having a U-shaped cross section that extends upward from the upper surface of the rear end of the base 32 and opens rearward, and a contact portion 53 that protrudes forward from the front surface of the mounting portion 52. The mounting portion 52 is attached to the base 32 by an appropriate means such as welding or screwing. The left-right width of the mounting portion 52 is configured to be slightly narrower than the left-right width of the base 32.

[0045] The abutment portion 53 is composed of a bolt having a thread formed on its shaft portion 53a, and is attached to a mounting hole (not shown) provided on the front surface of the mounting portion 52 by using an adjustment nut 53c and a washer (not shown). The head of the bolt forms an abutment surface 53b that abuts against an interference member 56 (described later). As a result, the amount of protrusion of the abutment surface 53b from the mounting portion 52 in the front-rear direction is adjustable.

[0046] The contact portion 53 does not necessarily have to be configured so that the protruding amount of the contact surface 53b is adjustable, and the contact surface 53b may simply protrude by a predetermined distance. Also, the contact portion 53 may have another shape regardless of the bolt shape.

[0047] On the other hand, the upper row base 32 u A second stopper body (hereinafter simply referred to as the "stopper body") 54 is provided as the second stopper 50 on the upper surface of the rear end portion of the housing.

[0048] Figures 8 to 11 are enlarged views of the stopper body 54. In each of Figures 8 to 11, (A) is a perspective view seen from the L direction, and (B) is a perspective view seen from the R direction. Also, Figures 8 and 9 show the stored state of the stopper body 54. Fig. 9 shows the state in which the restriction bar 59c has been released at the same time. Also, Figures 10 and 11 show the protruding state of the stopper body 54. Fig. 10 shows the state in which the restriction bar 59c has been released at the same time.

[0049] The stopper body 54 includes a body mounting portion 55 having the same shape as the mounting portion 52 of the stopper pad 51, a long, hollow, rectangular columnar interference member 56 extending from the front surface of the body mounting portion 55, and an upper wall 57 and a lower wall 58 extending forward from the body mounting portion 55 above and below the interference member 56. The interference member 56, the upper wall 57, and the lower wall 58 are arranged so that their L-side surfaces are flush with the L-side surface of the body mounting portion 55.

[0050] On the R-side surface of the upper wall 57, angled ribs 57d, 57e having the same width as the main body attachment portion 55 are provided so that one surface of each of them is aligned along the lower side of the upper wall 57. The other surfaces of the ribs 57d, 57e are arranged to face each other.

[0051] A substantially rectangular rib 58b having the same width as the main body attachment portion 55 is disposed on the R side surface of the lower wall 58 so as to extend along the upper side of the lower wall 58. A notch 58c complementary to the shape of a regulating bar 59c (described later) is formed near the center of the rib 58b in the front-rear direction.

[0052] A shaft hole 57f is formed in the rib 57d near the main body attachment portion 55. A shaft hole (not shown) is also formed in the surface of the rib 58b facing the shaft hole 57f in the up-down direction. Further, a shaft hole (not shown) is also formed in the interference member 56 at a position corresponding to the shaft hole 57f of the rib 57d and the shaft hole (not shown) of the rib 58b.

[0053] A rotating shaft 62 is attached to these shaft holes. The interference member 56 rotates about the rotating shaft 62 extending vertically relative to the upper and lower side walls 57, 58, and is capable of moving between a stored position shown in Fig. 8 and a protruding position shown in Fig. 11.

[0054] The stopper body 54 also includes a regulating portion 59 having a cylindrical shaft portion 59b extending in the front-rear direction, a cylindrical handle 59a attached to the front end of the shaft portion 59b perpendicular to the shaft portion 59b, and a cylindrical regulating bar 59c attached parallel to the handle near the rear end of the shaft portion 59b.

[0055] Shaft holes 57g and 57h are formed in the opposing surfaces of rib 57d and rib 57e, respectively. Shaft portion 59b of restriction portion 59 passes through shaft holes 57g and 57h, and the entire restriction portion 59 is fixed to be rotatable about the axis of shaft portion 59b and is movable between a restriction position shown in Figures 8 and 11 and a release position shown by solid lines in Figures 9 and 10.

[0056] Further, the shaft portion 59b has a rectangular flange 59d in front of the rib 57e. A torsion coil spring 61 is attached around the shaft portion 59b between the flange 59d and the rib 57e. Both ends of the torsion coil spring 61 are fixed to the rib 57e and the flange 59d, and the handle 59a and the restriction bar 59c are biased in the direction shown by the white arrow in FIG.

[0057] As a result, the restriction bar 59c is always held in the restriction position shown in Figures 8 and 11. Only when the handle 59a is lifted as shown by the arrow in Figure 9, the restriction bar 59c is moved to the release position shown by the solid line in Figures 9 and 10.

[0058] As a result, when the interference member 56 is in the stored position of Fig. 8, the interference member 56 is restricted from rotating in the R direction and protruding. Also, when the interference member 56 is in the protruding position of Fig. 11, the interference member 56 is restricted from rotating in the L direction and retracting.

[0059] In the storage position of the movable spectator seat 100 in which all the platforms 10 are aligned vertically and the legs 30 are aligned horizontally, when the bases 32 of the legs 30 of the vertically adjacent platforms 10 are aligned horizontally, as shown in FIG. 12, when the interference member 56 is in the protruding state, l The stopper 51 and the base 32 on the upper level u The stopper body 54 and the interference member 56 come into contact with each other.

[0060] It should be noted that the base 321 coupled to the first stage bed base does not include the engagement member 35 and the first stopper 34. Moreover, in the illustrated example, the first stage bed base does not include the second stopper 50.

[0061] (Moving seating operation) The following describes the operation of the movable spectator seats 100. The movable spectator seats 100 can be selectively set to a normal use position mode in which they are deployed to the normal use position, and a reduced use position mode in which they are deployed to the reduced use position.

[0062] (Normal use position mode) 13 and 14, the operation in the normal use position mode will be described. In the normal use position mode, all the stopper bodies 54 are in the stored state. In addition, in the storage position, the connecting chairs 20 are in the stored state in which they are folded forward.

[0063] When the movable spectator seats 100 move forward from the storage position to the normal use position, as shown in Figs. 13(A) and 14(A), the base 321 of the first stage moves forward from the rear end position A of the fixed member 44. l 13B, the first stopper 34 comes into contact with the support column of the base 321.

[0064] As the first-stage base 321 continues to advance, the support 31 of the first-stage base 321 is pulled toward the second-stage base 32, as shown in FIG. 13(C). l and then move further forward in conjunction with each other while shifted by a predetermined distance.

[0065] 2nd tier base 32 l The advance of the third base 32 u The first stopper 34 of the second stage base 32 l When the first stopper 34 abuts against the front end of the engagement member 35 of the second stage, the engagement member 35 swings upward around the rotation shaft 35c, during which the first stopper 34 retreats relatively, and as shown in FIG. 13(D), the first stopper 34 is brought into contact with the front end of the second stage base 32. l At this time, the hook 35a of the engagement member 35 contacts the front surface of the third-stage base 32. u The first stopper 34 engages with the front end of the first stopper 34.

[0066] By this engagement, the third stage base 32u But the second row base 32 l As the rods advance further, the second-stage support 31 contacts the third-stage base 32, as shown in FIG. 13(E). u 3. Press the first stopper 34 of the third stage base 32 u The first and second rows are base 32 1, 32 l It works in conjunction with this to begin moving forward.

[0067] Similarly, the first stopper 34 advances while sequentially engaging with the support 31 of the base 32 in the next step, and is shifted by a predetermined length from the step below, so that the first stopper 34 advances to the top step of the base 32 as shown in FIG. 14(B). u The first stage base 321 moves forward until the support pillar 31 engages with the first stopper 34 at the front end of the fixed member 44. The linked chairs 20 are then raised. In this way, the movable spectator seating 100 is positioned in the normal use position shown in FIG. 1(C) where the platforms 10 are shifted by one step and generally deployed in a staircase shape.

[0068] On the other hand, when moving backward from the normal use position to the storage position, although not shown in the drawings, first, the connecting chairs 20 on each platform 10 are tilted forward to be in a storage state. When the first stage base 321 is moved backward by the platform driving device, the first stage base 321 is moved backward by the second stage base 32. l and lined up left and right.

[0069] Then, the crosspiece 11 extending horizontally in the left-right direction of the first-stage bed base 10 pushes the release portion 35b of the engagement member 35 at the lower end of the support 31 of the second-stage bed base 10 backward, causing the engagement member 35 to swing upward, and the third-stage base 32 u This disengages the first stopper 34 at the front end from the engaging member 35. The crosspiece 11 further pushes the support 31, causing the first stage bed 10 and the second stage bed 10 to move backward together.

[0070] Next, the first base 321 and the second base 32 l Then, go back further and the third stage, base 32 of platform 10, uWhen the first and second floor bases are aligned in the left-right direction, the cross member 11 of the first floor base presses the release portion 35b of the engagement member 35 of the third floor base 10. Then, the engagement member 35 is swung to the fourth floor base 32. l The engagement with the first stopper 34 of the third stage 10 is released and the support pillar 31 is pushed. As a result, the third stage 10 of the bed frame 10 of the first stage 10 and the second stage 10 of the bed frame 10 of the second stage 10 are moved backward together while being vertically aligned.

[0071] Similarly, as the bases 32 of each stage are retracted while the engagement between the engaging member 35 and the first stopper 34 of the base 32 one stage above is sequentially released, the bases 32 of the multiple stages of the bed bases 10 are positioned in the storage position shown in Figure 1 (A) in which they are aligned with each other in the left-right direction and also with the fixing member 44.

[0072] (Shortened Use Position Mode) Operation in the retracted use position mode will be described with reference to Figures 15 and 16. In the retracted use position mode, all stopper bodies 54 are in a protruding state. When the movable spectator seats 100 move forward from the stored position to the retracted use position, as shown in Figures 15(A) and 16(A), first, the base 321 of the first stage platform 10 moves forward from the rear end position A of the fixing member 44. The forward movement of the base 321 causes the base 32 of the second stage to move forward. l The first stopper 34 comes into contact with the support column of the first-stage base 321 as shown in FIG. 15(B).

[0073] As the first-stage base 321 continues to advance, the support 31 of the first-stage base 321 is pulled up against the support 32 of the second-stage base 32. l The first stopper 34 is pushed and the robot advances while being shifted by a predetermined distance.

[0074] At this time, the third row base 32 u The interference member 56 of the second stage base 32 l The stopper 51 interferes with the forward movement of the second stage base 32. l And the third row base 32 u They line up on the left and right and move forward as one.

[0075] When the first stage base 321 further advances, the forward movement of the fourth stage base 32 l The first stopper 34 is fixed to the third base 32 in the same manner as in FIG. 13(D). u The engaging member 35 is swung upward to engage the third stage base 32. u The hook 35a of the engagement member 35 is brought into contact with the support 31 and engaged with the hook 35a.

[0076] Thereafter, the stopper pad 51 and the stopper body 54 interfere with each other, and the first stopper 34 of the upper step engages with the support 31 of the base 32 of the step above. As a result, the stopper pad 51 advances while repeating the above-mentioned interference between the stopper pad 51 and the stopper body 54 ... shown in FIG. 16(B), the stopper pad 51 advances to the uppermost step. u The first stage base 321 advances until the first support 31 engages with the first stopper 34 at the front end of the fixed member 44. Thereafter, the linked chair 20 of the top stage (upper stage) of the platform 10 of each set is raised.

[0077] In this way, the movable spectator seats 100 are arranged in the shortened use position shown in FIG. 1(B) in which the platform 10 is arranged in pairs in the vertical direction and deployed in a stepped manner overall.

[0078] On the other hand, when moving backward from the shortened use position to the storage position, first, the connecting chairs 20 on each platform 10 are tilted forward to the storage position. Then, the first base 321 moves backward, and the second base 32l and the third base 32 u and lined up left and right.

[0079] Furthermore, when the first tier base 321 moves backward, the first tier cross member 11 pushes rearward the release portion 35b of the engagement member 35 provided on the third tier support 31, causing the engagement member 35 to swing upward, releasing the engagement with the first stopper 34 at the front end portion of the base 32l of the fourth tier bed base 10 and pushing the support 31, thereby causing the first to fifth tier bed bases 10 to move backward together.

[0080] Similarly, while sequentially releasing the engagement of the first stoppers 34 provided every two tiers, the bed bases 10 of each tier move backward, and are positioned in a storage position in which the bases 32 of the bed bases 10 of the multiple tiers are aligned with each other in the left-right direction and also with the fixing members 44, as shown in Figures 1(A) and 15(A).

[0081] In this manner, the movable spectator seat 100 according to the present embodiment is provided with a first stopper that engages with the support 31 of the floor platform one level below the leg 30 that is connected to the second and subsequent floor platforms, and a second stopper 50 that allows the leg 30 of the floor platform 10 to be moved in conjunction with each other for each set of two floor platforms. The second stopper 50 is also provided with a stopper stopper 51 having an abutment portion 53, and a stopper body 54 having an interference member 56 that interferes with the abutment portion during forward movement to interlock the leg 30, and the interference member 56 is configured to be protruding / retracting. With the above configuration, when switching between the normal use position and the retracted use position, the normal use position and the retracted use position can be selectively deployed by a simple operation of switching the protrusion / retraction of the interference member 56 of the second stopper body.

[0082] Particularly in this embodiment, the second stopper 50 is composed of a stopper body 54 and a stopper pad 51. In the movable spectator seat of Patent Document 1, the stopper for deploying to the retracted use position needs to be provided in a position corresponding to the support pole in order to engage with the support pole, but in this embodiment, the stopper body 54 and the stopper pad 51 can be attached to the desired position of the leg.

[0083] Furthermore, by configuring the second stopper 50, particularly the stopper body 54, to be positioned behind the support pillar 31 of the leg 30, an operator can switch the stopper body 54 from the stored position to the extended position, or vice versa, with ample space when the movable spectator seats 100 are in the stored position, thereby improving workability.

[0084] In this embodiment, if the amount of protrusion of the contact surface 53b of the stopper stopper 51 is adjustable, it becomes possible to adjust the contact with the interference member 56, which is affected by the finish of the building floor, when the movable spectator seat 100 is operated in the retracted use position mode, and it becomes possible to prevent shocks and abnormal noises during operation. If the contact portion 53 is constructed with a bolt as in the above example, it is particularly easy to adjust the amount of protrusion of the contact surface 53b.

[0085] In this embodiment, the second stopper body 54 is provided with a restricting portion 59 that restricts movement of the interference member 56 from the stored position to the protruding position and from the protruding position to the stored position. This makes it possible to prevent the interference member 56 from erroneously moving between the protruding position and the stored position.

[0086] In this embodiment, the restricting bar 59c of the restricting portion 59 is configured to be biased by a torsion coil spring 61, which is an elastic member, in a direction to hold the interference member 56 in the stored position. As a result, unless an operator lifts the restricting portion 59 to release the restriction, the interference member 56 cannot be moved from the stored position to the protruding position, making it possible to more reliably prevent malfunction.

[0087] In the above example, the shortened use position has been described as being one in which all bed platforms except the first bed platform are deployed in a stepped manner in pairs of two as shown in Fig. 1(B). However, the deployed state of the shortened use position is not limited to this, and can be changed so that some bed platforms are deployed in pairs of two and the remaining bed platforms are deployed one platform at a time in a stepped manner, as shown in Figs. 17(A) and (B).

[0088] Specifically, the stopper body 54 of the legs 30 connected to the 9th and 11th stage bed bases 10 is set in an extended state, and the second stopper body 54 of the legs 30 connected to the 3rd, 5th and 7th stage bed bases 10 is set in a stored state, and the movable spectator seat 100 is unfolded, thereby achieving the unfolded state shown in Figure 17(A).

[0089] In addition, the stopper body 54 of the legs 30 connected to the third, fifth and seventh tiers of bed bases 10 can be set to an extended state, and the stopper body 54 of the legs 30 connected to the ninth and eleventh tiers of bed bases 10 can be set to a stored state, thereby unfolding the movable spectator seating 100, thereby achieving the unfolded state shown in Figure 17(B).

[0090] (Modification) The above embodiment may be modified as follows. The modifications may be made alone or in combination. Configurations that are not specifically described in the following description are the same as those in the above embodiment.

[0091] Variation 1 In the retracted use position, the movable spectator seat 100A according to the first modification is deployed in a stepped manner with the floor base 10 arranged in a set of two steps aligned vertically, as in FIG. 1B. However, as shown in FIG. 18A, the base 32 of the lower step l 18B, the stopper body 54B of the second stopper 50B is attached in the front-rear direction opposite to that of the above embodiment. u In the first modified example, the stopper pads 51 are attached in the opposite positions to those in the above-described embodiment. Therefore, in the first modified example, the lower stage bed 10 is the first bed base, and the upper stage bed 10 is the second bed base.

[0092] In the shortened use position mode, as shown in Fig. 18(C), the interference member 56 of the stopper main body 54 is in a protruding state and comes into contact with the stopper mating member 51 of the upper tier base adjacent to the L side. Therefore, as in the embodiment, when the base of the lower tier moves forward, it interferes with the base of the upper tier and moves forward in conjunction with it. If the base of the lower tier interferes with the base of the upper tier when it moves forward, and the legs of the lower tier are configured to interlock with the legs of the upper tier, the same effects as in the embodiment can be achieved regardless of whether the stopper main body 54 and the stopper mating member 51 are attached to the base of the upper tier or the base of the lower tier.

[0093] Variation 2 In the retracted use position of the movable spectator seat 100B according to the second modification, the platform 10 is arranged in a vertically aligned set of two steps, and is deployed in a stepped manner as a whole, as in Fig. 1(B). As shown in Fig. 19(A), the stopper body 54B, which is the second stopper 50B, is attached to the leg 30 connected to the lower platform, which is the first platform, in the same orientation as in the first modification.

[0094] However, what is attached is the lower level base 32 l 19(B), the leg 30 connected to the upper bed base 10 has a stopper pad 51B, which is a second stopper, attached to the rear surface of the pillar 31. The stopper pad 51B does not have an attachment portion, and the abutment portion 53, which is made up of a bolt and a nut, is attached directly to the pillar, as in the above embodiment.

[0095] As shown in FIG. 19(C), in the retracted use position mode, as the first tier base 321 moves forward, the upper tier stopper stopper 51B interferes with the interference member 56 of the lower tier stopper main body 54B, and the movable spectator seats 100B are deployed to the retracted use position with a predetermined length shift between every two tiers, similar to the movable spectator seats in the embodiment.

[0096] In this way, the attachment position of the second stopper on the leg 30 is not limited to the base 32, but may be the support pillar, as long as it is located behind the support pillar. In this modified example as well, due to the interference between the stopper stopper 51B and the stopper body 54B, the legs 30 connected to the set of bed bases aligned vertically can be deployed to the retracted use position in unison with the forward movement of the first stage base 321.

[0097] Variation 3 In the movable spectator seat 100C according to the third modification, as shown in Fig. 20, the stopper body 54C of the second stopper 50C is configured to be longer in the front-rear direction than the stopper body 54C, and the protruding amount at the protruding position is large. Specifically, while the protruding amount of the interference member 56 according to the embodiment is a length equivalent to the width of the base 32 in the left-right direction, the protruding amount of the interference member 56 according to the present embodiment is configured to be approximately twice that.

[0098] In the movable spectator seating 100C, as shown in FIG. 21, three adjacent tiers in the vertical direction are grouped together, such as the 2nd to 4th tiers, the 5th to 7th tiers, . . . , and the base 32 of the lowest tier, which is the first tier of each group, is l The stopper body 54D is attached to the base 32 of the upper two stages of the second stage. u2, 32 u1 A stopper stopper 51 is provided in the same direction as in the second modification.

[0099] An interference member 56C of the stopper body 54C is movable in the direction of the double arrow, similarly to the stopper body 54, between a stored position shown by a chain line in FIG. 21(A) and a protruding position shown by a solid line.

[0100] As a result, in the normal use position mode, the movable spectator seats 100C are deployed in a staircase-like manner, with each platform 10 being shifted by one level, as in the movable spectator seats 100. On the other hand, in the contracted use position mode, as shown in FIG. 21(B), the bases 32 of the upper and lower three platforms 10 of the set of platforms 10 are l, 32 u2, 32 u1 As a result, the movable spectator seating 100C is deployed in a staircase-like manner with the floor bases 10 aligned in the vertical direction in three tiers each.

[0101] In this way, by changing the amount of protrusion of the interference member 56C of the stopper body and changing the leg 30 to which the stopper pad 51 is attached corresponding to the length, the number of bed bases aligned vertically in the retracted use position can be changed.

[0102] The second stopper 50C of this modification may be disposed in the same orientation as in the embodiment. In this case, the stopper body 54C is attached to the base of the uppermost bed base 10 of the three bed bases that are aligned vertically in the retracted use position. The stopper pad 51 is attached to the base of the lower two bed bases 10.

[0103] When the stopper body 54C is in the protruding state and the bottom base moves forward, the stopper pad 51 of the bottom base interferes with the stopper body 54C of the top base, and the top and bottom bases try to move forward in alignment. At the same time, the top support 30 pushes the cross members 11 of the lower two levels and moves forward. As a result, the bases of the upper and lower three levels of the bed base 10 move forward together in left-right alignment, and each set is deployed with a predetermined distance offset in the front-rear direction.

[0104] Variation 4 In the movable spectator seat 100D according to the fourth modification, the stopper body 54D of the second stopper 50D has a structure generally similar to that of the stopper body 54. However, as shown in Figures 22(A) and (B), it is different in that the interference member 56D has a deployment restricting portion 56Dd that, in the stored position, projects in the opposite direction (L direction) to the protruding direction (R direction) in the protruding position. The deployment restricting portion 56Dd has a trapezoidal column shape that opens rearward in the stored position.

[0105] 22(B), when the interference member 56D is in the protruding position, the deployment restricting portion 56Dd is stored within the range of the lateral width of the upper and lower side walls 57, 58, that is, the left-right width of the base 32.

[0106] In the reduced use position mode, the movable spectator seating 100D is set so that the second and subsequent tiers of platforms are all aligned vertically in pairs, as shown in FIG. 1(B).

[0107] 23(A) is an enlarged plan view of the rear end of the base 32 of the movable spectator seats 100D when the movable spectator seats 100D are in the stored position. In this stored position, the stopper bodies 54D are aligned from right (R) to left (L) from the lower tier to the upper tier, similar to the movable spectator seats 100 according to the embodiment.

[0108] In FIG. 23(A), a normal use position mode is set in which all stopper bodies 54D are in the stored state.

[0109] The movement of the stopper main bodies 54D for switching from the normal use position mode to the retracted use position mode in which the stopper main bodies 54D are in a protruding state is restricted by the deployment restricting portions 56Dd.

[0110] Specifically, as shown in Fig. 23(B), when the adjacent interference member 56D on the right side (i.e., the lower stage side) is in the protruding position, the L-side interference member 56D can move from the stored position to the protruding position without hindrance. On the other hand, as shown in Fig. 23(C), when the adjacent interference member 56D on the R side (i.e., the lower stage side) is in the stored position, the protrusion 56Ga of the L-side interference member 56D interferes with the deployment restricting portion 56Dd of the R-side interference member 56D and cannot move to the protruding position.

[0111] In order to switch from the normal use position mode to the retracted use position mode, the interference members 56D must be in the protruding position in all of the stopper bodies 54D. Therefore, in this modified example, the operations must be performed in order from the R side (i.e., the lower stage side) to the L side (i.e., the upper stage side).

[0112] FIG. 24(A) is similarly an enlarged plan view of the rear end of the base 32 when the movable spectator seat 100D is in the stored position, with the (fully) retracted use position mode set and all stopper bodies 54G in a protruding state.

[0113] The movement of the stopper main body 54D for switching from the retracted use position mode to the normal use position mode is also restricted by the deployment restricting portion 56Dd.

[0114] Specifically, as shown in Fig. 24(B), when the adjacent interference member 56D on the L side (lower stage side) is in the storage position, the L-side interference member 56D can move from the protruding position to the storage position without hindrance. On the other hand, as shown in Fig. 22(C), when the adjacent interference member 56D in the L direction (lower stage side) is in the protruding position, the deployment restricting portion 56Dd of the R-side interference member 56D interferes with the deployment restricting portion 56Dd of the L-side interference member 56D and cannot move to the storage position.

[0115] To switch from the retracted use position mode to the normal use position mode, the interference members 56D must be in the extended position in all stopper bodies 54D. Therefore, in this modified example, the operation must be performed in order from the L side (lower stage) to the R side (upper stage). When the interference member 56D of the topmost stopper body 54D is in the extended position, all interference members 56D are in the extended position.

[0116] 23(A) and 24(A), a first limit switch LS1 is attached to the stopper body 54D of the third base, which is turned ON when the interference member 56D moves to the stored position and turned OFF when the interference member 56D moves to the protruding position. Also, a second limit switch LS2 is attached to the stopper body 54D attached to the top base, which is turned OFF when the interference member 56D moves to the stored position and turned ON when the interference member 56D moves to the protruding position.

[0117] Therefore, for example, by connecting it to an indicator or the like, the first limit switch LS 1と By making it possible to confirm the ON / OFF state of the second limit switch LS2 by an electrical signal, it is possible to easily confirm whether the stopper is in the extended / retracted state that matches the desired mode.

[0118] [Table 1]

[0119] As described above, when the interference member 56D is provided with the deployment restricting portion 56Dd that protrudes in the opposite direction to the protruding direction and restricts the operation of the adjacent interference member 56D, it becomes necessary to perform operations in a predetermined order to set all the stopper bodies 54D to the protruding state or the stored state. Therefore, the operator always performs operations in the predetermined order, which makes it possible to prevent erroneous operations.

[0120] Furthermore, according to the above configuration, when all the stopper bodies 54D are set to the protruding state or the retracted state, the protruding / retracted state of all the stopper bodies 54D can be confirmed simply by checking the stopper bodies 54D that should be operated first and last. Therefore, it is not necessary to provide limit switches on all the stopper bodies 54D to confirm the state of the stopper bodies 54D. Limit switches need only be attached to the stopper bodies that should be operated first and last in each state, which makes it possible to reduce manufacturing costs.

[0121] As another variant, the movable spectator seats may be configured as a single movable spectator seat by combining a set of floor stands connected to legs having a second stopper for vertically aligning two tiers of floor stands as a set in the shortened use position, and a set of floor stands connected to legs having a second stopper for vertically aligning a different number of tiers (for example, three tiers) of floor stands as a set. [Explanation of symbols]

[0122] 10 floor; 30 legs; 31 pillars; 32,321,32 l ,32 u, 32 u1, 32 u2 Base; 34 First stopper; 34b Mounting portion; 50, 50A to 50E Second stopper; 52 Mounting portion; 53, 53A Contact portion; 54, 54B to 54D, 54F, 54G Second stopper body; 56, 56B to 56G Interference member; 56Gd Deployment restriction portion; 59 Restriction portion, 61 Torsion coil spring (elastic member); 100, 100B to 100G Movable spectator seat

Claims

1. A multi-level platform; and a plurality of legs each including a support column for horizontally supporting each of the plurality of stages of platform beds, and a base extending in the front-rear direction at a lower end of the support column and movable in the front-rear direction; a first stopper that engages with a support column of a bed platform one level below the bed platform supported by the leg, and enables the bed platform supported by the leg and the bed platform one level below to advance in conjunction with each other in a stepped manner; a second stopper that vertically aligns a part of the plurality of stages of bed tables as a set of bed tables and enables the set of bed tables to be moved in conjunction with each other; A movable spectator seat that can be moved between a storage position in which the multiple levels of floor platforms are generally aligned vertically, and a normal use position in which the multiple levels of floor platforms are deployed stepwise one level at a time, or a shortened use position in which the sets of floor platforms are deployed stepwise, The leg of the first bed base constituting each set is provided with a second stopper body having an interference member configured to be protruded toward and retracted into the leg of the second bed base constituting each set, as the second stopper; the leg of the second bed base includes a stopper stopper that, when moving forward, interferes with the interference member to link the first bed base and the second bed base, The interference members are arranged to be aligned in the left-right direction when the movable spectator seats are in the stored position, and are provided with a deployment restricting portion that protrudes in a direction opposite to the protruding direction of the interference members when the interference members are in the protruding position in the stored position to restrict movement of the adjacent interference members, A movable spectator stand characterized in that the deployment restricting portion is stored within the lateral range of the leg of the second platform when the interference member is in the stored position.

2. 2. The movable spectator stand according to claim 1, wherein the stopper stopper has an abutment portion that abuts against the interference member when moving forward, and the protruding length of the abutment portion is adjustable.

3. 3. The movable spectator stand according to claim 1, wherein the second stopper is provided behind the support pillar.

4. A movable spectator seat as described in any one of claims 1 to 3, characterized in that the second stopper body is provided with a regulating portion that regulates movement toward the protruding position when the interference member is in the stored position, and movement toward the stored position when the interference member is in the protruding position.

5. The movable spectator stand according to claim 4, wherein the restricting portion is biased by an elastic member to restrict the movement of the interference member from the stored position toward the protruding position.

6. A movable spectator stand as described in any one of claims 1 to 5, characterized in that, in the stored position, the interference member extends in the front-to-rear direction of the leg, and moves from the stored position to the protruding position by rotational movement about an axis extending in the up-down direction.

Images