Mobile seating

Abstract

Movable stands comprise a plurality of floor stands (10) and a plurality of legs (30) that horizontally support the floor stands (10) and can move the floor stands forwards and backward. The leg (30) includes: a mode switching unit (50) provided with a first stopper (34) capable of moving forward the floor stand (10) and the floor stand (10) one level below while interlocking the floor stands in a state in which the floor stands are displaced stepwise, and a second stopper (52) that is provided at the leg (30) of a first floor stand constituting a set composed by some of the plurality of floor stands (10), that is configured to be capable of projecting toward the legs (30) of the remaining floor stands (10) of the set and retracting, and that engages with the legs (30) of the remaining floor stands (10) so that the floor stands (10) of the set can be moved while being interlocked and vertically aligned, the mode switching unit (50) being movable between a stowage position and a normal use position or a shortened use position, and switching between the protruding state and retracted state of the second stoppers (52); and a switching drive unit (60) arranged behind the legs in the stowage position. A plurality of sets of mode switching units (50) are integrally driven to switch between the protruding state and retracted state of the plurality of sets of second stoppers (52) in conjunction with the driving of the switching drive unit (60) in the stowage position.

Description

[Technical Field]

[0001] The present invention relates to a moving spectator seat. [Background technology]

[0002] Conventionally, movable spectator seats are known that can move back and forth in conjunction with each other between a use position in which multiple tiers of platform are deployed in a stepped manner overall and a storage position in which they are aligned overall in the vertical direction.

[0003] The movable spectator seating in Patent Document 1 comprises multiple tiers of platforms, connected 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 back and forth, and which engage with each other to link the platforms together.

[0004] The movable spectator seats in Patent Document 1 are provided with an inverted L-shaped angle stopper at the front end of the base of each leg connected to the platform except for the lowest platform, and by engaging this with a support column connected to the platform one level below, the platforms move in unison and are deployed one step at a time in a staircase-like manner to their normal usage position.

[0005] Furthermore, 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 some of the multiple tiers of platforms are aligned vertically and the length in the front-to-back 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 case of the movable spectator seats of Patent Document 1, in order to switch between a normal use position mode in which the seats are deployed to a normal use position and a shortened use position mode in which the seats are deployed to a shortened use position, it is necessary to individually change the mounting positions of the stoppers while the seats are stored in the storage position, which poses a problem of cumbersome work.

[0008] The present invention has been made in consideration of the above circumstances, and aims to provide a movable spectator seat that can be switched between a mode in which it is deployed to a normal use position and a mode in which it is deployed to a retracted use position in an integrated manner with a simple operation. [Means for solving the problem]

[0009] In order to achieve the above object, one embodiment of the present invention provides a movable spectator seating arrangement comprising: a plurality of tiers of platforms; and a plurality of legs that support the platforms horizontally and are movable in the front-to-rear direction; wherein the legs have a first stopper that engages with the leg of a platform one level below the platform that the legs support, allowing the platform and the platform one level below to advance in unison while being offset in a stepped manner; and a second stopper that is attached to the leg of a first platform that constitutes a group of platforms, forming a group of platforms from among the plurality of tiers, and is configured to be able to protrude and retract toward the leg of the remaining platform in the group, and engages with the leg of the remaining platform, allowing the platform of the group to advance in unison while being aligned vertically; and wherein the platforms can be positioned in a stored position where they are all aligned vertically; a normal use position where the platforms are deployed one level at a time in a stepped manner; is a movable spectator seating that can be moved between a shortened use position in which the sets of platforms are unfolded in a stepped manner, and includes a plurality of sets of platforms, and in each set, the leg of the first platform is provided with the second stopper and a mode switching unit having a switching lever that protrudes rearward from the leg of the first platform and switches the extension / retraction state of the second stopper, and the movable spectator seating further includes a switching drive unit fixed to the rear of the legs of the plurality of platform members that are aligned in the left-right direction in the stored position, and the switching drive unit is provided with a movable part that engages with the plurality of sets of switching levers in the stored position, and in conjunction with the drive of the movable part, drives the plurality of sets of switching levers together to switch the extension / retraction state of the plurality of sets of second stoppers.

[0010] For ease of understanding, the movable spectator seating of the above aspect will be described in accordance with the embodiment shown in Figs. 1 to 9. Adjacent even-numbered stage 10 and odd-numbered stage 10, which are part of a multi-stage structure, form a stage set. The first stage (i.e., one of the stage sets) that constitutes the set is the leg 30 (base 32) of the even-numbered stage 10. e ) is provided with a second stopper 52 and a mode switching unit 50 having a switching lever 55 for switching the protruding / retracted state of the second stopper 52. The second stopper 52 is also provided with a mode switching unit 50 having a second stopper 52 and a switching lever 55 for switching the protruding / retracted state of the second stopper 52. The second stopper 52 is provided with a mode switching unit 50 having a second stopper 52 and a second stopper 52 and a mode switching unit 50 having .... The second stopper 52 is provided with a mode switching unit 50 having a second stopper 52 and a mode switching unit 50 having a second stopper 52. o ) so that adjacent sets of even-numbered and odd-numbered platform slats 10 can move forward in unison while aligned vertically. The movable spectator seating 100 has a plurality of sets of even-numbered and odd-numbered platform slats 10, which are deployed in a stepped manner to assume the retracted use position. The switching drive unit 60 is disposed behind the legs 30 aligned in the left-right direction when the movable spectator seating 100 is in the stored position. The switching drive unit 60 engages with a plurality of sets of mode switching units 50 when in the stored position. When the movable part 62 of the switching drive unit 60 is driven, the switching levers 55 of the plurality of sets of mode switching units 50 engaged with the movable part 62 are driven together in conjunction with the drive, switching between the extended and retracted states of the plurality of set second stoppers 52.

[0011] The above description has been given of the present invention in accordance with one embodiment shown in Figures 1 to 9, but the present invention is not limited to the illustrated embodiment. Various modifications are possible, including those described below. [Effects of the Invention]

[0012] According to the movable spectator seating of the above aspect, switching between a mode in which it is deployed to the normal use position and a mode in which it is deployed to the retracted use position can be performed in an integrated manner with a simple operation. [Brief explanation of the drawings]

[0013] [Figure 1] 1A and 1B are side views of a movable spectator seating system according to an embodiment of the present invention, showing the system in the stored position, the system in the retracted use position, and the system in the normal use position. [Figure 2] This is an oblique view of the movable spectator seating with a portion of the platform cut away in its normal use position. [Figure 3] 10A and 10B are perspective views of the movable spectator seat with the second stopper of the mode switching unit stored, where FIG. 10A is a front perspective view and FIG. 10B is a rear perspective view. [Figure 4] 10A and 10B are perspective views of the mode switching unit with the second stopper protruding, where FIG. 10A is a front perspective view and FIG. 10B is a rear perspective view. [Figure 5] 10A and 10B are diagrams illustrating the operation of the mode switching unit. [Figure 6] FIG. 2 is a perspective view of a switching drive unit of the movable spectator seating. [Figure 7] 10(A) to 10(E) are diagrams illustrating the structure of the switching drive unit of the moving spectator seat. [Figure 8] 10(A) and 10(B) are diagrams illustrating the operation of the switching drive unit. [Figure 9] 10A and 10B are diagrams illustrating the unfolding operation of the movable spectator seats, in which (A) shows the unfolded state in the normal use position mode, and (B) shows the unfolded state in the retracted use position mode. [Figure 10] FIG. 10 is a diagram showing a switching drive unit of one modified example of the movable spectator seats according to the present embodiment. [Figure 11] FIG. 10 is a diagram showing a switching drive unit of another modified example of the movable spectator seats according to the present embodiment. [Figure 12] FIG. 10 is a side view illustrating the configuration of the movable spectator seats in the expanded state according to the modified example. [Figure 13] 10A and 10B are diagrams illustrating another example of the configuration of the movable part of the switching drive unit according to the modified example. DETAILED DESCRIPTION OF THE INVENTION

[0014] The movable spectator seating according to the embodiment of the present invention will be described below with reference to the accompanying drawings. Note that the embodiment is merely an example and the present invention is not limited thereto. In the following description of the embodiment, the same components are designated by the same reference numerals, and duplicated descriptions will be omitted as appropriate.

[0015] In this specification, the "front" of the movable spectator seating 100 refers to the direction toward the lowest tier when in the used position, "rear" refers to the direction toward the highest tier, "left" refers to the left when facing forward, and "right" refers to the right when facing forward. In each figure, the front is indicated by arrows F, rear by B, left by L, right and R, up by U, and down by D. Furthermore, symbols indicating multiple identical components in each figure will be omitted as necessary.

[0016] The movable spectator seats 100 according to the embodiment are installed on the floor surface FL of an indoor stadium, various halls, etc., and are used as spectator seats.

[0017] As shown in Figure 1, the movable spectator seating 100 generally comprises a plurality of platforms 10, linked chairs 20 arranged side by side and arranged on each platform 10, legs 30 that support each platform 10 horizontally so that it can move forward and backward, and that engage and link the platforms 10 together, and fixing parts 40 for fixing to a storage space S within a wall or the like. Hereinafter, the bottommost platform 10 will be referred to as the first platform 10, and the platforms 10 will be counted in ascending order.

[0018] The movable spectator seating 100 can be selectively set to a storage position shown in Fig. 1(A), a shortened use position shown in Fig. 1(B), or a normal use position shown in Fig. 1(C). In the storage position, the multiple tiers of platform 10 that make up the movable spectator seating 100 are aligned vertically as a whole, and in the normal use position, the multiple tiers of platform 10 are deployed, offset one tier at a time in a staircase-like manner.

[0019] In addition, in the shortened use position, except for the first tier, pairs of adjacent even-numbered and odd-numbered tiers of bed stands 10 are aligned vertically to form pairs, such as the second and third tiers, the fourth and fifth tiers, and so on, and the multiple pairs of bed stands 10 are deployed in a staircase-like pattern overall.

[0020] The connecting chair 20 is a set of multiple stand-up chairs that are fixed to the platform 10 via connecting pipes and legs extending in the left-right direction, allowing them to swing and rise and fall between a use state shown by 20a in Figures 1(A) to (C) and a storage state shown by 20b.

[0021] As shown in Figure 2, each platform 10 comprises a cross member 11 extending horizontally in the left-right direction of the movable spectator seating 100, a floor member 12 whose rear end is supported on the underside of the cross member 11 and which extends horizontally in the lateral direction in front of the cross member 11, and two pairs of vertical beams 16 spaced apart in the lateral direction of the platform 10 and which extend horizontally forward from the lower end of the cross member 11.

[0022] The legs 30 comprise a pair of left and right support posts 31 and a pair of left and right bases 32 connected to the lower ends of the support posts 31. The support posts 31 are connected to the back of the beam member 11 and extend vertically downward. The base 32 has approximately the same width as the support posts 31, extends in the front-to-rear direction of the movable spectator seating 100, and has the support posts 31 fixed to its middle section.

[0023] The legs 30 are provided with braces 38 that extend obliquely from near the base ends of the support columns 31 at each base 32 toward the inside of the cross members 11 and the movable spectator seats 100. The upper ends of the braces 38 are connected to the back surfaces of the cross members 11. In this way, the legs 30 support the platform 10 in a cantilevered manner.

[0024] The columns 31 are lengthened by the column difference for each column 10, starting from the column 31 connected to the first column 10. The horizontal distance between each pair of columns 31 narrows by approximately twice the horizontal width of the base 32 for each column 10, from the column connected to the top column 10. As a result, in the storage position shown in Figure 1(A), the columns 31 connected to adjacent columns 10 on the top and bottom are aligned in the left-right direction.

[0025] 2, the pair of left and right bases 32, which are respectively coupled to the bed base 10, are symmetrical. In the following description, the L-side base 32 will be described, and a description of the R-side base 32 will be omitted.

[0026] The base 321 (FIG. 8) connected to the first stage platform (hereinafter referred to as the "first stage base"; the same applies to the other bases 32) and the odd-numbered bases 32 other than the first stage base 321 are connected to the first stage platform platform. o In the following description, when there is no need to distinguish between them, they will be referred to as base 32, and when there is a need to distinguish between them, they will be referred to as bases 321 and 32e, respectively. o ,32 e It will be explained as follows.

[0027] The base 32 is made of a long channel steel that extends in the front-to-rear direction and has a U-shaped cross section that opens downward. A number of running rollers 35 are attached in series to the opening, allowing the legs 30 to move in the front-to-rear direction while supporting the platform 10 horizontally.

[0028] Base 32 o ,32 e The first stopper 34 is a plate-like member in the shape of an inverted L-shape, and its upper surface faces the base 32 toward the base of the platform 10 one level below. e ,32 o The first stopper 34 is fixed by suitable means such as screws so that it projects out approximately the same width as the base 32. The upper surface of the first stopper 34 is slightly spaced from the upper surface of the base 32 when in the storage position. o ,32 e When aligned in the left-right direction, they do not interfere with the adjacent bases 32.

[0029] Also, base 32 o ,32 e An engaging member 36 having a downward-facing claw at its front end and a lever-shaped release portion is provided on the lower end L side of the support pillar 31 so as to be able to swing freely up and down as shown by the double arrow in Figure 2.

[0030] Odd-numbered base 32 oA stopper stopper 37 is provided on the upper surface of the rear end of the stopper stopper 37. The stopper stopper 37 is a channel steel having a U-shape that opens forward in a plan view, and is attached by an appropriate means such as welding.

[0031] On the other hand, the even-numbered base 32 e The same base 32 is attached to the top surface of the rear end of the e A mode switching unit 50 is provided to switch between a normal use position mode in which the platform 10 coupled to the platform 10 is deployed in a stepped manner offset from the odd-numbered platform of the same group, and a shortened use position mode in which the platform 10 is deployed in alignment with the odd-numbered platform of the same group. The mode switching unit 50 will be described in detail later.

[0032] Returning to Figure 1, the fixed section 40 comprises a fixed member 44 extending along the base 32, a fixed support 43 extending upward from the rear end of the fixed member 44, a fixed beam 42 fixed to the fixed support 43 above the fixed support 43 and extending in the front-to-rear direction parallel to the fixed member 44, a top surface floor platform 41 without a chair that is supported on the topmost platform 10 via the fixed support 43, and a rear wall 45 erected at the rear end of the top surface floor platform 41 without a chair.

[0033] The first stopper 34 is attached to the front end of the fixed member 44 in the same manner as the first stopper 34 is attached to the base 32 .

[0034] 1(A), in the storage position, a switching drive unit 60 is fixed at a position facing the bases 32 aligned in the left-right direction. As shown in FIG. 2, a pair of switching drive units 60 are provided corresponding to the pair of left and right bases 32. The switching drive unit 60 will be described later. Since the switching drive unit 60 is also symmetrical, the L side will be similarly described, and a description of the R side switching drive unit 60 will be omitted.

[0035] 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 pays out a belt-like chain with wheels on each connecting piece when the drum rotates forward, and winds it up onto the drum when the drum rotates backward. The tip of the belt-like chain is connected to the first platform 10. Paying out and winding up the belt-like chain moves the first platform 10 in the forward and backward directions, and the entire multi-level platform 10 that is directly or indirectly engaged with the first platform 10 via the legs 30 can be moved in the forward and backward directions.

[0036] (Mode switching unit) 3 and 4 are perspective views of the mode switching unit 50, with FIG. 3 showing a state in which the second stopper is stored (hereinafter referred to as the "stored state"), and FIG. 4 showing a state in which the second stopper 52 is protruded (hereinafter referred to as the "protruded state"). Also, FIGS. 5(A) and (B) show a set of bases 32 in the retracted position of the movable seats 100. o ,32 e 5(A) and (C) show the second stopper 52 in a retracted state, and Fig. 5(B) and (D) show the second stopper 52 in a protruding state.

[0037] The mode switching unit 50 generally comprises a base portion 51, a second stopper 52, a stopper rotation shaft 53 connected to the second stopper 52, a lever connecting plate 54, and a mode switching lever (hereinafter referred to as the "switching lever") 55.

[0038] The base 51 is a metal member that extends in the front-rear direction, opens upward, and has a substantially U-shaped cross section with a high R-side wall 51a and a low L-side wall 51b. e The second stopper 52 is a square tube having a width approximately the same as the width of the base 51 in the left-right direction, and its base end 52a is closed. A notch is formed in the middle of the R-side wall 51a so as to match the shape of the second stopper 52. Support walls 56, 57 are erected from the bottom surface of the base 51, following the notch.

[0039] Between the support walls 56 and 57, a stopper rotation shaft 53 extending in the front-rear direction is supported rotatably about an axis (axis line) A shown in Figures 5(A) and (B). A base end portion 52a of the second stopper 52 is connected to the stopper rotation shaft 53 with a bolt 52c. A bolt 52b is attached to the front surface of the second stopper 52. The upper portion of the support wall 57 forms a bent portion 57a ​​that is bent forward at a right angle.

[0040] The rear end of the stopper rotation shaft 53 is connected to a first end 54a of an oval-shaped lever connecting plate 54. In the stored state, the longitudinal axis of the lever connecting plate 54 is inclined at 45 degrees in the R direction around the stopper rotation shaft with respect to the second stopper 52. A rod-shaped switching lever 55 that extends rearward and has a tapered rear end is connected to a second end 54b of the lever connecting plate 54.

[0041] In the stored state of the second stopper 52, the second stopper 52 is attached in a position in which the longitudinal direction is the up-down direction, and the R side surface of the second stopper 52 is flush with the R-side wall 51a. In this state, when the switching lever 55 is moved 90° in the L direction, the stopper rotation shaft 53 rotates 90° via the lever connecting plate 54, and accordingly, the second stopper 52 is rotated around the stopper rotation shaft 53 by the base 32 in the adjacent odd-numbered stage (one stage above). o 4. The second stopper 52 is tilted in the direction L toward the lower wall 51b and stops when it abuts against the upper end 51c of the lower wall 51b. At this time, the second stopper 52 is in the protruding state shown in FIG.

[0042] In the protruding state, the second stopper 52 is positioned on the L side, i.e., on the upper base 32. o In this state, by moving the switching lever 55 from the L side to the R side, the second stopper 52 swings around the stopper rotation shaft 53 in conjunction with the stopper rotation shaft 53 until it abuts against the bent portion 57a ​​of the support wall 57, and the second stopper 52 enters a stored state.

[0043] Bolts are provided as spring mounting portions 58a and 58b on the upper end portion of the front surface of second stopper 52 and on support wall 56, respectively, shifted toward the R side from stopper rotation shaft 53. A linear tension coil spring 59 is attached between spring mounting portions 58a and 58b as an elastic member.

[0044] The second stopper 52 is biased in the storage direction (R direction) by the tension coil spring 59 when the axis B of the tension coil spring 59 is in the storage direction (R direction) relative to the stopper rotation axis 53 as viewed from behind in Figures 5(C) and 5(D), and is biased in the protruding direction (L direction) when the axis B of the tension coil spring 59 is in the protruding direction (L direction).

[0045] As a result, when moving the second stopper 52 from the stored state to the extended state, the switching lever 55 only needs to be moved until the axis B of the tension coil spring 59 exceeds the stopper rotation axis 53 in rear view, and when moving the second stopper 52 from the extended state to the stored state, the switching lever 55 only needs to be moved halfway until the axis B of the tension coil spring 59 exceeds the stopper rotation axis 53 in rear view, and thereafter the elastic force of the tension coil spring can completely transition the stopper to the extended state or the stored state, preventing incomplete mode switching. The mode switching unit 50 may be detachably attached to the base 32 with bolts and nuts, or may be fixed by welding or the like.

[0046] (Switching drive unit) Figures 6(A) and 6(B) are perspective views of the switching drive unit 60. Figures 7(A) and 7(B) are plan views of the switching drive unit 60, Figure 7(C) is a cross-sectional view in the front-rear direction, and Figures 7(D) and (E) are front views. Figures 6(A), 7(A), and 7(D) show a mode in which the second stopper 52 is stored (normal use position mode), and Figures 6(B), 7(B), and 7(E) show a mode in which the second stopper 52 is protruded (reduced use position mode).

[0047] The switching drive unit 60 includes a fixed part 61 and a movable part 62. The fixed part 61 is a rectangular metal member that has a generally U-shaped cross section in the front-to-rear direction that opens downward and extends in the left-to-right direction. A blade-shaped grounding part 63 is formed in the front-to-rear cross section, extending in the front-to-rear direction from the opening at the lower end, and is fixed to the floor surface FL of the storage space S at the grounding part 63 by bolts or the like (not shown).

[0048] An electrically driven linear drive device 65 is provided inside the fixed part 61. In this example, the linear drive device 65 is a rod actuator. However, the linear drive device 65 is not limited to this, and known linear drive mechanisms such as a ball screw, linear guide, servo motor unit, air cylinder, etc. can also be used. The linear drive device 65 couples a rod 65a to the movable part 62, and moves the movable part 62 in the left-right direction by extending and retracting the rod 65a.

[0049] Guide windows 69a are formed on the front and back of the fixed part 61, through which a connecting part 68 that connects the rod 65a and the movable part 62 is inserted and which guide the rod 65a in the left-right direction. The fixed part 61 also has a guide pin 69b that penetrates and protrudes in the front-rear direction and is inserted into a guide window 67 of the movable part 62, which will be described later. A pair of limit switches 71 that determine the left-right stopping positions of the connecting part 68 are provided on the R-side back of the fixed part 61, at positions corresponding to the R-side end and L-side end of the guide window 69a.

[0050] The movable part 62 is composed of a flat plate part 64 that is approximately rectangular and extends in the vertical and horizontal directions, and a guide part 62a with an inverted L-shaped cross section that is provided on the back surface of the flat plate part 64 and matches the upper part of the fixed part 61. The guide part 62a is capable of running on the upper surface of the fixed part 61 like a straddle-type monorail.

[0051] Elliptical lever insertion holes 66 are provided at a predetermined interval in a row in the left-right direction on the upper part of the flat plate portion 64. The number of lever insertion holes 66 corresponds to the number of mode switching units 50 provided on the movable spectator seat 100. The interval d (FIG. 7(D)) between the lever insertion holes 66 is approximately twice the width of the base 32.

[0052] The switching drive unit 60 is fixed to the floor surface FL of the storage space S opposite the base 32 aligned in the left-right direction in the storage position so that the position of the lever insertion hole 66 corresponds to the position of the switching lever 55 where the second stopper 52 of the mode switching unit 50 is stored in the normal use position mode shown in Figures 6(A), 7(A), and 7(D).

[0053] The left-right dimension w (FIG. 7(D)) of the lever insertion hole 66 is set to be slightly larger than the dimension of the switching lever 55, taking into consideration the positional accuracy during the deployment and storage movement of the base 32. The up-down dimension h (FIG. 7(D)) is set in consideration of the up-down movement that occurs as the switching lever 55 moves left-right when switching modes.

[0054] A rod-shaped connecting part 68 connected to the linear drive device 65 is attached to the lower part of the L side of the movable part 62 so as to penetrate the back surface of the guide part 62a from the flat plate part 64 and protrude rearward. In addition, an oval guide window 67 extending in the left-right direction is formed in the lower part of the R side of the flat plate part 64, through which a guide pin 69b protruding from the fixed part 61 is inserted to guide the horizontal movement of the movable part 62.

[0055] By driving the linear drive device 65, the movable part 62 moves left and right together with the connecting part 68 connected to the linear drive device 65, switching the limit switches 71 at both ends. In this way, it is possible to move between the normal use position mode shown in Figures 6(A), 7(A), and 7(D) and the retracted use position mode shown in Figures 6(B), 7(B), and 7(E).

[0056] 8, when the movable seats 100 are in the retracted position and the rear end of the switching lever 55 corresponding to the lever insertion hole 66 is inserted into the lever insertion hole 66, driving the linear drive device 65 will cause the movable part 62 to be driven in the L direction, thereby switching all of the mode switching units 50 together from the normal use position mode shown in FIG. 8(A) to the retracted use position mode shown in FIG. 8(B). Driving the movable part 62 in the R direction will also enable switching from the retracted use position mode to the normal use position mode.

[0057] (Deploying the retractable seats) The unfolding operation of the movable seats 100 will be described below with reference to the schematic plan view of a portion (first to fourth rows) of the movable seats 100 in FIG.

[0058] (Normal position mode) When the normal use position mode of FIG. 8(A) is set, all the second stoppers 52 are in the stored state.

[0059] As shown in FIG. 9(A), when the movable seats 100 move forward from the storage position to the normal use position, the base 321 of the first tier moves forward first. e The first stopper 34 comes into contact with the support 31 of the base 321. When the first-stage base 321 continues to move forward, the support 31 of the first-stage base 321 comes into contact with the support 31 of the second-stage base 321. e and moves further forward while shifted by a predetermined distance.

[0060] Second level base 32 e The advance of the third base 32 o The first stopper 34 is connected to the second stage base 32. e When the first stopper 34 abuts against the front end of the engaging member 36, the engaging member 36 swings upward around the rotation axis, during which the first stopper 34 moves backward relatively, and the second-stage base 32 e At this time, the hook of the engaging member 36 contacts the front surface of the third-stage base 32. o The first stopper 34 engages with the front end of the first stopper 34.

[0061] Similarly, the first stopper 34 advances while sequentially engaging with the support posts 31 of the base 32 of the next higher step, and the linked chair 20 is unfolded to the normal use position shown in Fig. 1(C) by shifting from the next lower step by a predetermined length. Then, the linked chair 20 is raised.

[0062] 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 platform driving device moves the first base 321 backward, the first base 321 moves backward to the second base 32 e and lined up left and right.

[0063] Then, the cross member 11 extending horizontally in the left-right direction of the first stage bed base 10 pushes the engagement member 36 at the lower end of the support 31 of the second stage bed base 10 backward, causing the engagement member 36 to swing upward, and the third stage base 32 o The engagement between the first stopper 34 at the front end of the support 31 and the engaging member 36 is released. The support 31 is further pushed by the cross member 11, and the first stage slab 10 and the second stage slab 10 are thereby moved backward together.

[0064] Next, the first base 321 and the second base 32 e retreats to the third base 32 o When the first and second bases 10 are aligned in the left-right direction, the cross member 11 of the first base 10 pushes the release portion of the engaging member 36 of the third base 10. Then, the engaging member 36 is swung to release the fourth base 32. e The first stopper 34 is released from engagement with the second stopper 34 and the support post 31 is pushed. This is repeated in sequence until the support post 31 is positioned in the storage position.

[0065] (Shortened use position mode) On the other hand, when the shortened use position mode of FIG. 8(B) is set, all of the second stoppers 52 are in the protruding state. When the movable seats 100 move forward from the storage position to the shortened use position, the base 321 of the first tier moves forward first. eThe first stopper 34 comes into contact with the support column 31 of the first stage base 321 as shown in FIG. 9(B).

[0066] As the first-stage base 321 continues to move forward, the support 31 of the first-stage base 321 moves toward the second-stage base 32. e The first stopper 34 is pushed and the robot advances while being shifted by a predetermined distance.

[0067] At this time, the second base 32 e The head of the bolt 52b of the second stopper 52 is inserted into the base 32 of the third stage. o The stopper 37 of the third stage abuts against the rear surface of the base 32. o The stopper 37 is connected to the second base 32. e The second stopper 52 engages with the second stage base 32. e Then, the third stage bases 320 move forward together in a state of being aligned on the left and right.

[0068] When the first stage base 321 further advances, the fourth stage base 32 e The first stopper 34 is connected to the third stage base 32. o The engaging member 36 is swung upward to the third stage base 32. o The support rod 31 abuts against the support rod 31 and engages with the engaging member 36.

[0069] Thereafter, the platform 10 advances while repeating the interference between the stopper stopper 37 and the second stopper 52, and the engagement between the first stopper 34 on the upper level and the support 31 of the base 32 one level above it, so that each platform 10 is arranged in a set of two levels, shifted by a predetermined length, and aligned vertically in a set of two levels, with each set deployed in a stepped manner overall, to a shortened use position.

[0070] The movable spectator seating of this embodiment is configured with a switching drive unit that can switch between the normal use position mode and the retracted use position mode, i.e., the extended / retracted state of the second stoppers 52 of all platform sets, all in one unit.This makes it possible to easily perform the mode switching work, which was previously complicated as it was necessary to extend and retract each one individually.

[0071] Furthermore, in the movable spectator seating of this embodiment, the mode switching unit 50 for switching the protruding / storing state of the second stopper 52 is configured to connect the second stopper 52 to a stopper rotation shaft 53 that can rotate around an axis extending in the front-to-rear direction, and is equipped with a switching lever that is connected to the stopper rotation shaft 53 and protrudes rearward from the leg, so that the mode switching operation can be easily performed behind the storage position of the movable spectator seating 100.

[0072] Furthermore, in the movable spectator seat 100 according to this embodiment, the second stopper 52 can be switched between the extended and retracted states simply by moving the switching lever of the mode switching unit left and right from the rear of the leg, which is advantageous because the mode switching can be driven by a very simple device that comprises a movable part 62 that moves linearly left and right and a fixed part 61 that supports the movable part 62.

[0073] Furthermore, for this reason, it is particularly preferable that the switching drive unit 60 can be switched using a simple linear drive device such as a rod actuator.

[0074] <Variation 1> 10A and 10B are front views of a switching drive unit 60A of a movable spectator seat 100A according to a first modified example, with FIG. 10A showing the normal use position mode and FIG. 10B showing the retracted use position mode.

[0075] The fixed portion 61A and the movable portion 62A have roughly the same configuration as the fixed portion 61 and the movable portion 62. However, the switching drive unit 60A does not include the linear drive device 65. The switching drive unit 60A includes a swing lever 82 connected to a first connecting plate 81 attached to the R side of the fixed portion 61A so as to be swingable around a fulcrum 83 provided at one end. The first connecting plate 81 is connected to a second connecting plate 84 at its other end 85. The second connecting plate 84 is attached to the movable portion 62A so as to be rotatable around a connecting portion 68A. As a result, swinging the swing lever 82 left and right moves the movable portion 62A left and right. In the movable seating 100A, the limit switch 71 is provided on the L side and is switched by a guide pin 69bA.

[0076] In this way, the switching drive unit 60A does not necessarily have to be driven electrically, but may be driven manually.

[0077] The switching drive unit 60A according to this embodiment is configured to switch the protruding / retracted state of the second stopper 52 of the mode switching unit 50 with the simple action of moving straight left and right, so that mode switching can be performed manually without the need for any particularly complicated mechanism.

[0078] <Variation 2> Fig. 11 is a diagram illustrating a switching drive unit 60B of a movable spectator seating 100B according to a second modified example. Fig. 11(A) is a plan view showing the overall configuration of the switching drive unit 60B set to the reduced use position mode in the stored position of the movable spectator seating 100B, Fig. 11(B) is a cross-sectional view in the front-rear direction of the same, Fig. 11(C) is a front view of the first movable part 162 of the same, and Fig. 11(D) is a front view of the second movable part 262 of the same.

[0079] The switching drive unit 60B is generally configured such that two switching drive units 60 are arranged offset in the front-to-rear direction. That is, a first fixed part 161 and a first movable part 162 are arranged in the front, and a second fixed part 261 and a second movable part 262 are arranged in the rear. The first fixed part 161 and the second fixed part 261 are integrally configured and continuous at their intermediate parts in the front-to-rear direction. The flat plate portion (first flat plate portion) 164 of the first movable portion 162 is disposed so as to face the leg portions (second to fifth leg portions) 30 of a part of the plurality of sets (of the platform 10) that are provided with the mode switching unit 50, and the flat plate portion (second flat plate portion) 264 of the second movable portion 262 is disposed so as to face the leg portions (sixth to eleventh leg portions) 30 of the remaining part of the plurality of sets that are provided with the mode switching unit 50B. The first flat plate portion 164 is attached to the front surface of the guide portion 162a of the first movable portion 162. The second flat plate portion 264 is bent backward at its lower end and attached so as to protrude forward from the front surface of the guide portion 262a of the second movable portion 262. The second movable portion 262 is configured so as not to interfere with the first movable portion 162 when moved left and right.

[0080] The switching lever 55B of the mode switching unit 50B is extended to a length that allows it to pass through the lever insertion hole 66 of the second movable part 262 in the stored position. Furthermore, the first and second flat plate parts 164, 264 are sized so that the first flat plate part 164 and the second flat plate part 264 do not interfere with each other even when the first movable part 162 is set to the retracted use position mode and the second movable part 262 is set to the normal use position mode as shown by the dashed dotted line in Figure 11 (C).

[0081] In the example of Figure 11, the first movable unit 162 can switch the deployment mode for the bottom two sets of five platforms 10, i.e., the second to fifth stages, and the second movable unit 262 can switch the deployment mode for the top three sets, i.e., the sixth to eleventh stages. The first movable unit 162 and the second movable unit 262 can be moved independently in the left-right direction by a linear drive device 65 provided separately. This makes it possible to set the deployment patterns shown in Table 1 below.

[0082] [Table 1] In this way, it becomes possible to respond to development patterns that meet the needs of consumers.

[0083] The first and second flat plate portions 164, 264 are removably attached to the first and second movable portions 162, 262, respectively, by through holes 74 and screws 75 (and nuts not shown) provided in the first and second movable portions 162, 262.

[0084] The first and second flat plate portions 164, 264 are not necessarily detachable, and may be fixed by welding or the like, or may be formed as one unit. However, if they are detachable, it is advantageous to prepare sets of first and second flat plate portions with different combinations of the number of lever insertion holes 66 as shown in Figure 13, and make them interchangeable with the first and second flat plate portions 164, 264, since this allows for a wider variety of patterns to be developed.

[0085] Specifically, if the number of lever insertion holes 66 is configured to be one on the first flat plate portion 164A and four on the second flat plate portion 264A as shown in Figures 13(A) and 13(B), the deployment modes of the second and third stage beds 10 and the fourth to eleventh stage beds 10 can be changed independently. Also, if the number of lever insertion holes 66 is configured to be three on the first flat plate portion 164B and two on the second flat plate portion 264B as shown in Figures 13(C) and 13(D), the deployment modes of the second to seventh stage beds 10 and the eighth to eleventh stage beds 10 can be changed independently.

[0086] At this time, the mode switching units 50 and 50B are attached to the legs 30 facing the first flat plate portions 164A, 164B and the second flat plate portions 264A, 264B, respectively. Alternatively, the switching lever 55 may be detachable from the lever connecting plate 54, allowing the switching levers 55 and 55B to be replaced as needed.

[0087] This will make it possible to realize a deployment pattern that meets the needs of a wider variety of consumers.

[0088] In addition to the above modifications, the following modifications are possible. (1) When the second stoppers 52 are in a protruding state, the length of the second stoppers 52 protruding in the left-right direction is set to two bases 32, and the remaining two bases 32 that make up the same set are provided with stopper pads 37, so that in the retracted use position, the sets of bed stands aligned vertically are configured to be three levels in one set. In other words, the sets of bed stands aligned vertically in the retracted use position are not limited to two levels, but may be three or more levels.

[0089] (2) In the above embodiment, the second stopper 52 is attached to the lowest step of a set of platform stands. However, conversely, the second stopper 52 may be attached to the leg of the highest step of a set of platform stands, and the stopper stopper 37 may be attached to the base of the lowest step, rearward of the second stopper 52, so that the stopper stopper 37 engages with the second stopper 52 from behind.

[0090] (3) The attachment position of the second stopper 52 is not limited to the rear end of the base 32, but may be the support 31, as long as it is behind the support 31. The stopper stopper 37 may be replaced by the support 31.

[0091] It goes without saying that the number of platforms 10, the number of connecting chairs 20 placed on one platform 10, the number of chairs 21 on one connecting chair 20, and the number of pairs of legs 30 on one platform 10 can be changed as needed regardless of the example shown in the figure. [Explanation of symbols]

[0092] 10: Bed base 30: Leg 34: First stopper 40: Fixed part 50: Mode switching unit 51: Base part 52: Second stopper 53: Stopper rotation axis 55, 55B: Switching lever 59: Tension coil spring 60, 60A, 60B: Switching drive unit 61, 61A: Fixed part 62, 62A: Movable part 64: Flat part 65: Linear drive device 66: Lever insertion hole 82: Swing lever 83: Fulcrum 100, 100A, 100B: Moving spectator seat 161: First fixed part 162: First movable part 261: Second fixed part 262: Second movable part 164, 164A, 164B: First flat part (flat part of first movable part) 264, 264A, 264B: Second flat plate portion (flat plate portion of second movable portion) FL: Floor surface

Claims

1. Multi-level platform; and a plurality of legs that each horizontally support the platform and are movable in the forward and backward directions; the leg engages with the leg of a platform one level below the platform supported by the leg, allowing the platform and the platform one level below to move forward in conjunction with each other in a stepped manner; a second stopper that is provided on the leg of a first platform that constitutes a group of platforms, and that is configured to be able to protrude and retract toward the legs of the remaining platforms of the group, and that engages with the legs of the remaining platforms to enable the platforms of the group to move forward in conjunction with one another while being aligned vertically; A movable spectator seat that can be moved between a storage position in which the platform is generally aligned vertically, and a normal use position in which the platform is deployed stepwise one step at a time, or a shortened use position in which the set of platform is deployed stepwise, A plurality of sets of the bed bases are provided, In each set, the leg of the first platform is provided with the second stopper and a mode switching unit having a switching lever that protrudes rearward from the leg of the first platform and switches between a protruding state and a retracted state of the second stopper, The movable spectator seats further include a switching drive unit fixed to the rear of the legs of the plurality of stages of platform that are aligned in the left-right direction in the storage position, The switching drive unit is provided with a movable part that engages with the multiple sets of switching levers in the storage position, and a fixed part that supports the movable part, and is characterized in that it drives the multiple sets of switching levers integrally in conjunction with the drive of the movable part, switching between the protruding and retracted states of the multiple sets of second stoppers.

2. the mode switching unit includes a stopper rotation shaft that extends in a front-rear direction, is coupled to the second stopper, and is configured to be rotatable about an axis that extends in the front-rear direction, and a base portion that rotatably supports the stopper rotation shaft, The switching lever is coupled to the stopper rotation shaft to rotate the stopper rotation shaft, 2. The movable spectator seating according to claim 1, wherein the switching lever is moved left and right by the driving of the movable portion, thereby switching between the protruding and retracted states of the second stopper.

3. the movable portion includes a flat plate portion facing the leg portion aligned in the left-right direction at the storage position, and the flat plate portion has a lever insertion hole into which the switching lever protruding rearward is inserted when the movable portion is at the storage position, the lever insertion hole being formed at a distance corresponding to the spacing of the switching lever; 3. The movable spectator seating according to claim 1, wherein a plurality of sets of the switching levers move left and right in conjunction with left and right movement of the movable portion.

4. The movable spectator seating according to claim 2 or claim 3 dependent on claim 2, wherein the second stopper is biased in the retracting direction by a tension coil spring attached between the second stopper and the base portion when the second stopper is in the retracting direction of the second stopper relative to the stopper rotation axis relative to the axis of the tension coil spring, and when the second stopper is in the protruding direction of the second stopper, the second stopper is biased in the protruding direction.

5. The movable spectator seating according to claim 3 or claim 4 dependent on claim 3, characterized in that the movable portion is movable in the left-right direction by a linear drive device provided on the fixed portion.

6. The movable portion of the switching drive unit is connected to a swinging lever configured to be swingable left and right around a fulcrum provided on the fixed portion, and the movable portion is movable left and right by swinging the swinging lever left and right. This is a movable spectator seat as described in claim 3 or claim 4 dependent on claim 3.

7. The switching drive unit is a first fixed portion and a first movable portion, and a second fixed portion and a second movable portion, each configured similarly to the fixed portion and the movable portion except for the length in the left-right direction and the number of the lever insertion holes; the first fixed portion and the first movable portion are disposed to face some pairs of leg portions among the plurality of pairs, the second fixed portion and the second movable portion are disposed behind the first fixed portion and the first movable portion, facing the remaining pairs of legs among the plurality of pairs; the flat plate portion of the first movable portion is formed with the lever insertion holes, the number of which corresponds to the number of the mode switching units facing the first movable portion; the flat plate portion of the second movable portion is formed with the lever insertion holes, the number of which corresponds to the number of the mode switching units facing the second movable portion; A movable spectator seat as described in claims 3, 5, 6 or claim 4 dependent on claim 3, wherein the switching lever of the mode switching unit facing the second movable part has a length that allows it to be inserted into the lever insertion hole of the second movable part when in the stored position.

8. the flat plate portion of the first movable portion is configured to be detachable from the first movable portion, the flat plate portion of the second movable portion is configured to be detachable from the second movable portion, The movable spectator seats according to claim 7, characterized in that the flat plate portion of the first movable part and the flat plate portion of the second movable part are replaceable with flat plate portions of the first movable part and flat plate portions of the second movable part each having a different combination of numbers of lever insertion holes.

Images