JP6490452B2 - Seat structure and arrangement structure of bleachers - Google Patents

Description

  The present invention relates to a seat structure suitable as a viewing seat installed in a plurality of rows in a stadium, a gymnasium, a movie theater, and other theaters that perform sports, and a seating structure using the seat structure.

  A large number of chairs for viewing used in sports stadium stands for baseball, soccer, etc. are installed in a number of hundreds to tens of thousands of seats. For example, it is made of hard plastic and has a simple shape in which the backrest stands up at about 90 degrees with respect to the seat.

  On the other hand, as shown in Patent Document 2, the present inventor has proposed various vehicle seats using a three-dimensional solid knitted fabric.

JP 2004-147772 A WO2002 / 091881

  As described above, since a large number of seats for viewing in the stadium are installed, the seats are compact and can be manufactured at low cost. In other words, it is based on a simple work chair with a backrest arranged at a substantially right angle to the seat, and most of them are for general seats. Different structures are used. Basically, it is like an easy chair in which a thick urethane cushion member is loaded on the seat and back. However, it is difficult to say that such a chair that is only considered to be seated comfortably is suitable for watching games. Even for VIP seats, it is important to be suitable for watching games at the stadium, and in particular, it is important to ensure a comfortable sitting or comfort in the sense that it is easy to maintain emotions and postures suitable for watching games. is there. In addition, there are several types of VIP seats and the like, and many types are arranged in a plurality of rows and a pedestal like a general auditorium. However, in the case of VIP seats, even if they are arranged in multiple rows, the foot space is secured wider than ordinary seats, so there are usually fewer steps than ordinary seats, and the entire stadium can be accommodated. Considering the number of people, it is often installed in the range of 2 to several stages. On the other hand, compared to the front row (front row facing the ground or aisle etc.), the rear row (after the second row) tends to have a smaller space, and invited guests on the front row are seated. In the case where an invitee on the side of the rear row is seated, in the rear row, the frequency of people going in and out in front of the seated person is high, and while ensuring a comfortable sitting space, a predetermined traffic space It is also necessary to ensure.

  On the other hand, when addicted to watching the game, the seated person tends to take a relaxed posture with his back on his back and lean forward with his back away from the back, and sits close to the front edge of the seat. It tends to take. It may also stand up. That is, since such posture changes frequently occur while watching a game, it is desirable to have a function that helps the posture changes.

  In addition, the three-dimensional solid knitted fabric disclosed in Patent Document 2 is lightweight and thin, but is rich in cushioning properties, heat retaining properties, and air permeability. In the case of a thick urethane cushion member, the amount of sinking of the buttocks tends to be large, and it is difficult to take a forward leaning posture when addicted to watching games, and the stand-up property is also impaired. In this respect, the three-dimensional solid knitted fabric has characteristics such as high rigidity when pressed in a predetermined area or more, and can firmly support the human body even if it is thin, and does not press with a strong reaction force partially. It is suitable as a cushion member for stadium seats.

  The present invention has been made in view of the above, and can sit comfortably in a stable posture, has high followability to posture changes due to movement of the center of gravity, and is suitable for watching a game under the eyes, etc. It is an object of the present invention to provide a seat structure in which space can be easily passed. Moreover, this invention makes it a subject to provide the arrangement structure of a bleacher seat which utilized this seat structure for the back row of the bleacher seat arrange | positioned in the shape of a plurality of rows of steps.

  In order to solve the above problems, the seat structure of the present invention is a seat structure including a seat portion, a backrest, and a leg portion that supports the seat portion and the backrest at a predetermined height, and the seat portion includes: A cushion member for a seat and a cushion member support mechanism for supporting the cushion member for the seat, and is supported by the leg at a position spaced downward from the cushion member for the seat. A support shaft provided along a direction, and a rotation connecting member that rotatably connects the cushion member support mechanism along an outer peripheral surface of the support shaft. The structure is divided in the middle of the direction, and the division position is set immediately above or in front of the rotation center of the rotation connecting member that rotates around the support shaft, and the seat portion is used for the seat portion. Cushion member and said cushion Characterized in that with Deployment member support mechanism is rotatable in the forward tilting direction.

When the division position of the cushion member for the seat portion is set in front of the rotation center of the connecting member for rotation, it reaches from the immediately above to a length corresponding to the rotation radius of the connecting member for rotation. It is preferable to set in the range.
The cushion member support mechanism is disposed substantially parallel to the planar member supporting the lower surface of the cushion member for the seat portion with a predetermined interval in the front-rear direction, and the planar member is spanned, and the planar member And a front frame and a rear frame that support the planar member by generating a frictional force between them and the planar member, and extend and contract in response to a downward displacement of the seat cushion member. It is preferable to have an elastic member for a planar member that exhibits at least one of an elastic force and a damping force.
A lower frame disposed substantially parallel to the front frame at a position spaced downward from the front frame; and the planar member is hung on the front frame, the rear frame, and the lower frame. The planar member expansion / contraction member is stretched between an end edge portion wound around from the upper side of the rear frame and an end edge portion hung from the lower side of the lower frame. preferable.
Between the backrest or the leg part, the part located behind the seat part and the cushion member support mechanism are expanded and contracted to regulate the forward tilt angle, and either elastic force or damping force It is preferable that a forward tilt restricting expansion / contraction member exhibiting at least one of the functions is stretched.
It is preferable that the backrest is provided with a back support member capable of adjusting the height.

  The arrangement structure of the auditorium according to the present invention is an arrangement structure of an auditorium in which a plurality of rows of auditoriums are arranged, and includes a seat portion, a backrest, and legs that support the seat portion and the backrest at a predetermined height. First seat structure in which the seat portion and the backrest slide back and forth, and a second seat in which the seat portion and the backrest do not slide back and forth, and the seat portion has a function of turning in the forward tilt direction The first seat structure is arranged as a front row seat, and the second seat structure is arranged as a rear row seat.

It is preferable that any one of the seat structures is used as the second seat structure.
The first seat structure includes a seat cushion member having a structure divided in the middle in the front-rear direction, a front frame and a rear frame arranged substantially in parallel in the front-rear direction at a predetermined interval, and the front part A planar member that spans between the frame and the rear frame, supports the lower surface of the cushion member for the seat, and is connected to the planar member, and expands and contracts according to the downward displacement of the cushion member for the seat And it is preferable that it is a structure provided with the expansion-contraction member for planar members which exhibits at least one function of an elastic force or a damping force.

  In the seat structure of the present invention, the seat is supported so as to be rotatable around the outer peripheral surface of the support shaft disposed below the cushion member for the seat via the connecting member for rotation. The cushion member has a structure divided in the middle in the front-rear direction, and the division position is set immediately above or in front of the rotation center of the connecting member for rotation. For this reason, if the seated person puts weight on the front side, the seated person easily rotates by a predetermined angle in the forward tilt direction. In the stadium seats and the like, it is a form that looks down on the object to be viewed, so in conventional seats, if you are absorbed in a game or the like, it tends to sit shallowly near the front edge of the seat. However, according to the present invention, when the center of gravity is close to the front edge, the seat is tilted forward by turning forward by a predetermined angle, so that it is easy to take a posture according to the emotion and mood of the seated spectator during watching. Cheap. The seat cushion member is divided into front and rear parts, and when a load is applied, the seat part is displaced downward about the split position and becomes substantially concave. Hard to occur. As a result, the seat structure of the present invention provides a stable seating posture and is suitable for use as a viewing seat in a stadium or the like.

  In the seat structure of the present invention, since the seat portion rotates in the forward tilt direction, it is not necessary to shift the buttocks up to the vicinity of the front edge of the seat portion even if the spectator is enamored. If the buttocks are shifted near the front edge, the knee position protrudes forward, which hinders people who move in front of the seated person. However, the seat structure of the present invention can take a posture suitable for watching as described above by rotating in the forward tilt direction, and it is not necessary to shift the buttocks and knee positions forward, so the passage space is widened. It can be secured. In general, stadium seats are in the front row (front row facing the ground, etc.), and only those who are seated in the front row pass through the front row. Compared to, there is less traffic. Further, the front row can take a relatively large foot space. This is the same for general seats, but in particular, a high-grade seat called a VIP seat or a special seat is designed to have a large depth space per step. Therefore, in the front row of such seats, although a large installation space is required, a seat portion that can be seated comfortably and a seat structure in which the backrest can slide back and forth are arranged, and the rear row row has the above-mentioned seats. It is preferable to arrange a seat structure in which the seat portion rotates in the forward tilt direction. By rotating the seat in the forward tilt direction, the ability to follow changes in posture is high, and the knee position rarely protrudes forward. It can be used as a back row auditorium. Therefore, by providing the front row seats with a seat structure that slides back and forth so that it can be seated more relaxedly, the invitee side sits in the next row seats, so that the invitee side can relax while also inviting the invitee side You can enjoy watching games in the same posture.

FIG. 1 is a front view showing a seat structure according to an embodiment of the present invention. 2 is a cross-sectional view taken along line AA of FIG. 1 when not seated. 3 is a cross-sectional view taken along line AA of FIG. 1 when seated. 4 is a cross-sectional view taken along line AA of FIG. 1 in a state where the seat portion is tilted forward. FIG. 5 is an exploded perspective view for explaining the structure of the seat. FIG. 6 is an exploded perspective view for explaining the structure of the cushion member support mechanism. FIG. 7 is a perspective view of a configuration in which a plurality of sets of seat portions and backrests according to the embodiment of FIGS. FIG. 8 is an exploded perspective view of FIG. FIG. 9 is a front view showing an embodiment of a seat structure suitable for use in a front row (especially the front row) bleachers. 10 is a cross-sectional view taken along line AA of FIG. 9 when not seated. 11 is a cross-sectional view taken along line AA of FIG. 9 when seated. FIG. 12 is a perspective view of a configuration in which a plurality of sets of seat portions and backrests according to the embodiment of FIGS. 9 to 11 are connected via leg portions. 13 is an exploded perspective view of FIG. FIG. 14 shows a seat structure according to the embodiment shown in FIGS. 10 to 11 suitable as a first seat structure installed in a front row seat and a second seat structure installed in a rear row seat. It is a top view which shows the arrangement structure which combined the seat structure which concerns on embodiment of FIG. FIG. 15 is a side view of each seat structure in the arrangement structure shown in FIG. 14 when sitting in a state where the seat portion is not slid forward in the front row and in a state where the seat portion is not tilted forward in the rear row. FIG. 16 is a side view of each seat structure in the arrangement structure shown in FIG. 14 when sitting in a state where the seat portion is slid forward in the front row and in a state where the seat portion is tilted forward in the rear row. is there.

  Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings. The seat structure 1 according to this embodiment includes a seat portion 10, a backrest 20, and leg portions 30. FIG. 1 shows a mode in which the leg portions 30 and 30 are arranged on both sides of the seat portion 10 and the backrest 20 as a set. However, as shown in FIGS. It is also possible to adopt a configuration in which a plurality of sets of the portion 10 and the backrest 20 are connected to each other via the leg portions 30, and the leg portions 30 arranged between adjacent groups can be shared by the left and right seated persons.

  The seat portion 10 includes a cushion member 11 for a seat portion and a cushion member support mechanism 12, and the cushion member support mechanism 12 is supported by the leg portions 30 and 30. The leg portions 30 and 30 are formed in a substantially rectangular shape having a predetermined height from the installation surface, support the seat portion 10 and protrude to a position above the seat portion 10, and upper portions thereof are armrest portions 31 and 31. It has become.

  A backrest 20 is supported between the rear portions of the pair of leg portions 30, 30 above the substantially central portion in the height direction. Specifically, the side portions 21a and 21a are fixed at positions close to the rear portions of the leg portions 30 and 30, and the substantially central portion 21b in the width direction is fixed at a position behind the side portions 21a and 21a. The backrest frame 21 is provided so as to have a curved shape rearward, and the backrest cushion member 22 is supported by the backrest frame 21. The back cushion member 22 is a three-dimensional fabric having a predetermined thickness, preferably one or a plurality of three-dimensional solid knitted fabrics, which are used in a laminated manner. The front of the back frame 21 and the peripheral portion of the back frame 21 are provided. The surface is covered with a skin material 23. In addition, as the skin material 23, when the seat structure 1 of this embodiment is used for VIP seats or the like, it is preferable to use genuine leather having air permeability in order to show a high-class feeling.

  The backrest 20 is preferably provided with a cushion member, preferably a substantially rectangular backrest member 24 in which a three-dimensional solid knitted fabric is covered with a skin material such as genuine leather so that the height can be adjusted. The means for supporting the height adjustment is optional, but in the present embodiment, a fastener 23a is provided in the longitudinal direction on the skin material 23, a back support member 24 is connected to the slider of the fastener 23a, and the back support member 24 is attached. If the slider is moved up and down, the slider can be moved up and down along the fastener 23a to adjust the height. By providing such a backing member 24, the position can be adjusted according to the physique and preference of the seated person, and it becomes easier to maintain a more comfortable posture, which is useful for long-term watching and viewing.

  Here, the seat 10 will be described in more detail. First, the structure of the cushion member support mechanism 12 that supports the seat cushion member 11 will be described. As shown in FIGS. 2, 5 and 6, the cushion member support mechanism 12 is disposed at a position corresponding to both side portions of the seat portion 10 with a predetermined interval, and has a predetermined width and length. The two plate-like bodies 121 and 121 are formed in a substantially square shape as a whole. In the upper part between the two plate-like bodies 121, 121, a front frame 122 that spans the front edge side of the seat portion 10 is spanned, and the front portion A rear frame 123 is spanned substantially parallel to the frame 122, and a lower frame 124 is spanned substantially parallel to the front frame 122 at a predetermined distance below the front frame 122. As a result of the arrangement of the front frame 122, the rear frame 123, and the lower frame 124 as described above, the front frame 122, the rear frame 123, and the lower frame 124 have a substantially triangular shape with the lower frame 124 as a vertex when viewed from the side.

  Further, each plate-like body 121, 121 is located slightly rearward and upward from the attachment position of the lower frame 124, and is spaced apart by a predetermined distance below the imaginary line connecting the front frame 122 and the rear frame 123. In addition, substantially semicircular cutout portions 121a and 121a are formed, and one semicircular portion 125a constituting the rotation connecting member 125 is spanned and fixed between the cutout portions 121a and 121a. The rotation connecting member 125 is used together with the other semi-annular portion 125b shown in FIG. 5, and forms an annular shape by connecting flanges 125a1 and 125b1 close to each other with a support shaft 32 to be described later and connecting them with bolts 125c. .

  Here, a support shaft 32 straddling between the leg portions 30 and 30 is disposed at a predetermined height position between the adjacent leg portions 30 and 30. The support shaft 32 is solid or pipe-shaped, and is formed so that the outer peripheral surface has a circular cross section. As in this embodiment, the outer peripheral surface of the support shaft 32 is preferably covered with a sliding member 33 having a low coefficient of friction such as a dry bearing. In addition, as shown in FIG. 8, in the case of a configuration in which a plurality of sets of the seat portion 10 and the backrest 20 are connected via the leg portion 30, a length that spans the plurality of sets of support shafts 32 is common. The sliding member 33 and the rotation connecting member 125 can be provided corresponding to each set.

  Thus, the entire cushion member support mechanism 12 supported by the rotation connecting member 125 rotates around the outer peripheral surface of the support shaft 32 via the sliding member 33. In other words, since it operates at a position that is separated by an amount corresponding to the rotation radius from the rotation center C (axis of the support shaft 32) to the outer peripheral surface of the rotation connecting member 125, it rotates in a direction that follows the displacement of the center of gravity of the seated person. It's easy to do.

  A rear support frame 34 is stretched between the adjacent leg portions 30 at a predetermined interval behind the support shaft 32. Stopper members 126, 126 projecting downward are provided behind the substantially semicircular cutout portions 121a, 121a of the respective plate-like bodies 121, 121. The stopper members 126, 126 are provided on the rear support frame 34. Contact is possible. As shown in FIGS. 2 and 3, when the seat portion 10 is not tilted forward, the stopper members 126 and 126 are supported in contact with the rear support frame 34, and as shown in FIG. When 10 is tilted forward, the stopper members 126 and 126 are separated from the rear support frame 34.

  Between the plate-like bodies 121, 121, two reinforcing frames 127, 128 are spanned between the rear frame 123 and the stopper members 126, 126 at different heights. Among them, a reinforcing member (hereinafter referred to as “upper reinforcing frame”) 127 disposed on the upper side is engaged with a connecting member 127a having an L-shaped cross section, and the connecting member 127a has a forward tilt restricting elastic member 129 made of a coil spring. Is engaged (see FIGS. 5 and 6). The other end of the forward tilt restricting expansion / contraction member 129 is engaged with a bent piece 21a protruding forward at the lower portion of the backrest frame 21 located behind the seat portion 10 (see FIG. 2). By the forward tilt restricting expansion / contraction member 129, the cushion member support mechanism 12 is restricted in the forward tilt angle when the forward tilt operation is performed, and is quickly returned to the direction in which the stopper members 126 and 126 are in contact with the rear support frame 34. The force to act acts. In addition, it is preferable to set so that the maximum forward inclination angle of the surface (seat surface) of the seat portion 10 with respect to the horizontal state is in a range of 2 to 8 degrees. The forward tilt restricting expansion / contraction member 129 may be a member that restricts the forward tilt angle while applying an elastic force, such as a coil spring, as in the present embodiment. Further, it is possible to use a device that regulates the forward tilt angle while applying a damping force. It is also possible to have a configuration in which both are combined.

A planar member 130 is wound around the front frame 122, the rear frame 123, and the lower frame 124. The planar member 130 is composed of a two-dimensional or three-dimensional fabric. In order to allow the seat cushion member 11 to be displaced downward, the planar member 130 is preferably configured to expand and contract in the plane direction by a load. In order to expand and contract in the surface direction, in the present embodiment, a planar member 130 made of a two-dimensional fabric is hung so as to pass above the rear frame 123 and the front frame 122, and further, the front frame 122 is routed so as to pass through the lower side of the lower frame 124, and passes through the upper side of the rear frame 123 and goes downward, and passes through the lower side of the lower frame 124 and passes upward. A planar member elastic member 131 made of a coil spring is disposed between the other edge portion 130b to be displaced, and the edge portions 130a and 130b are connected to each other. Accordingly, when a person is seated and a load is applied on the seat cushion member 11, the upper surface portion 130c of the planar member 130 positioned between the front frame 122 and the rear frame 123 is displaced downward from the initial position. At the same time, the elastic member 131 for the planar member extends. When a person stands up, the planar member elastic member 131 contracts, and the upper surface portion 130c of the planar member 130 returns to the initial position. Further, the planar member expansion / contraction member 131 may extend and absorb the displacement of the planar member 130 by applying an elastic force, such as a coil spring, as in this embodiment. It is possible to use a damper that absorbs the displacement of the planar member 130 while applying a damping force, such as a damper having a piston, or a combination of both.
The planar member 130 that has passed through the lower side of the lower frame 124 is provided so as to pass through the upper surface side of one semi-annular portion 125a that constitutes the connecting member 125 for rotation (see FIG. 5). For this reason, a frictional force acts on the planar member 130 between the front frame 122, the rear frame 123, and the lower frame 124, and also a frictional force acts on one of the semi-tubular portions 125a. Therefore, the seat cushion member 11 is supported by combining these frictional forces with the elastic force or damping force of the planar member elastic member 131 described above. Further, before passing through the lower side of the lower frame 124 and passing through the one semi-tubular portion 125a, the planar member 130 contacts the flange 125a1 protruding toward the front side of the one semi-tubular portion 125a, and the bent portion In 130d, after being bent in a substantially square shape, it is in contact with the upper surface of one semi-tubular portion 125a (see FIGS. 5 and 6). The bent portion 130d bent in a substantially square shape serves as a fixed end when the planar member elastic member 131 is expanded and contracted.

  In the case where the planar member elastic member 131 is used, as in the present embodiment, it is inclined between the edge portion 130a hung on the rear frame 123 side and the edge portion 130b hung on the lower frame 124 side. It is preferable to provide it. As shown in FIGS. 2 to 4 and the like, this arrangement position is a position separated by a predetermined distance from the upper surface portion 130c of the planar member 130 located on the lower surface of the seat cushion member 11 on which a person is seated. In addition, when a person is seated, there is no feeling of foreign matter in the planar member elastic member 131 made of a coil spring.

  As long as the planar member 130 includes elastic yarn and has the necessary stretchability and durability, the planar member stretchable member 131 is not necessarily essential.

  The seat cushion member 11 is disposed on the upper surface portion 130 c of the planar member 130 of the cushion member support mechanism 12. In this embodiment, the lower layer cushion member 111 made of a bead foam whose lower surface is supported by the upper surface part 130c of the planar member 130, and the middle layer cushion member 112 made of a three-dimensional solid knitted fabric laminated on the lower layer cushion member 111, The upper layer cushion member 113 made of a three-dimensional solid knitted fabric laminated on the middle layer cushion member 112 is constituted by a laminated structure. The material of the cushion member 11 for the seat portion is not limited, and a thin urethane material or the like can be used. However, the seat cushion member 11 has characteristics such as high rigidity when pressed in a predetermined area or more. It is preferable to use a three-dimensional three-dimensional knitted fabric for at least one of the layers, because it can be firmly supported and is not partially pressed with a strong reaction force. The lower-layer cushion member 111 made of a bead foam has a higher spring constant than the middle-layer cushion member 112 and the upper-layer cushion member 113 using a three-dimensional solid knitted fabric, and fulfills the function of enhancing the feeling of supporting the load.

  The lower layer cushion member 111, the middle layer cushion member 112, and the upper layer cushion member 113 are all divided into two in the front-rear direction in the front-rear direction (division position A), and the front lower layer cushion member 111 a and the front middle layer cushion member 112a and a front upper cushion member 11a, and a rear cushion member 11b, a rear lower cushion member 111b, a rear middle cushion member 112b, and a rear upper cushion member 113b. (See FIG. 5). The front upper cushion member 113a extends from the front frame 122 toward the lower frame 124 on the front edge side, and the extended portion (cushion member extension portion) 113c extends from the back of the seated person's knee. Reduce the feeling of hitting the nail. Between the cushion member extension 113c and the planar member 130, an auxiliary cushion member 114 made of a three-dimensional solid knitted fabric, a thin urethane material, a bead foam or the like is further loaded to further enhance the cushioning property.

  The seat cushion member 11 is further provided with a skin material 115 that covers the upper surface of the upper cushion member 113. In the present embodiment, since the front seat cushion member 11a and the rear seat cushion member 11b are divided into two, the skin material 115 covers the upper surface of each, and the front seat cushion member. The retracting portion 115a is retracted into the gap at the dividing position A between the 11a and the rear seat cushion member 11b. As shown in FIG. 5, the skin material 115 covers not only the upper surfaces of the front seat cushion member 11a and the rear seat cushion member 11b, but also the front, lower, and rear portions of the seat 10. The internal structure is not exposed to the outside. Specifically, the surface of the cushion member extension 113c located at the front is covered, hung on the lower frame 124, and further hung on the lower reinforcing frame 128 located at the rear to cover the whole. Like to do. The material of the skin material 115 is not limited. However, when the seat structure 1 of the present embodiment is for a VIP seat, it is preferable to use genuine leather with air permeability in order to give a high-class feeling.

  Here, the division position A of the seat portion 10 of the present embodiment is set to a position immediately above or in front of the rotation center C of the rotation connecting member 125 that rotates the outer peripheral surface of the support shaft 32 ( 2 and 3). When the division position A is set in front of the position directly above the rotation center C, it is preferable to set the division position A in a range up to the length corresponding to the rotation radius from the rotation center C to the outer peripheral surface of the rotation connecting member 125. By being positioned within the range of the rotation track on the outer peripheral surface of the rotation connecting member 125, the seat portion 10 can be smoothly rotated in the forward tilt direction and in the return direction.

  In addition, the seat structure 1 of the present embodiment is provided with a height of the seat portion 10 in preparation for being arranged as a rear-row viewing seat. Therefore, a footrest 36 is attached to a position at a predetermined height from the lower ends of the leg portions 30 and 30. By attaching the footrest 36, the leg of the seated person has an acute angle between the thigh and the lower knee, so that the urinal can easily contact the lower part of the front frame 122 of the seat 10 from the back of the knee. However, in this embodiment, since the cushion member extension 113c is provided as described above, a soft contact feeling is obtained.

  In the seat structure 1 of the present embodiment, the surface (seat surface) of the seat portion 10 is substantially flat as shown in FIG. 2 before the person is seated. When a person is seated, the seat cushion member 11 is pressed downward by the weight of the person. In the present embodiment, since the front seat cushion member 11a and the rear seat cushion member 11b are divided with respect to the split position A, as shown in FIG. The front seat cushion member 11a has a slope that increases toward the front from the divided position A, and the rear seat cushion member 11b has a slope that increases toward the rear from the split position A. Sink into a concave shape.

  With the movement of the seat cushion member 11, the planar member 130 is expanded by the planar member elastic member 131, and, like the seat cushion member 11, the portion corresponding to the division position A is the lowest. It is displaced to become. As a result, the center of gravity of the seated person is supported at the most depressed position, and the front of the seat surface of the seat part 10 becomes higher. Therefore, even if the seated person sits in a relaxed state with the back on the backrest 20, It is possible to take a stable seating posture that prevents slipping.

  The front lower cushion member 111a, the front middle cushion member 112a, and the front upper cushion member 113a, and the rear seat cushion member 11b, which constitute the front seat cushion member 11a, are configured. Each of the rear end portions of the rear lower layer cushion member 111b, the rear middle layer cushion member 112b, and the rear upper layer cushion member 113b is pressed by the skin material 115, but is not fixed to the front frame 122 or the rear frame 123. The configuration is preferably a free end. Thereby, the inclination to the front end part direction of the cushion member 11a for front seat part and the inclination to the rear end part direction of the cushion member 11b for rear seat part are surely generated from the divided position A at the time of sitting. Thus, the stability of the sitting posture is improved.

  When the seated person's body is tilted forward and the center of gravity is moved forward as shown in FIG. 4, the connecting member for rotation of the cushion member support mechanism 12 is obsessed with watching a game or the like being performed under the eyes. 125 rotates forward around the outer peripheral surface of the support shaft 32, and the entire seat 10 rotates in the forward tilt direction. Even in this state, since the split position A is displaced downward most in the cushion member 11 for the seat portion, the front portion of the buttocks remains less likely to slip, and a stable seating posture can be ensured even in the forward tilted state. When rotating in the forward tilt direction, the forward tilt restricting expansion / contraction member 129 made of a coil spring extends a predetermined length, and the forward tilt angle is regulated. In addition, when the user leaves the seat, the seat portion 10 tilts forward so that the user can easily stand up.

  In the seat structure 1 of the present embodiment, the divided position A of the seat portion 10 is displaced downward most to support the buttocks, and the seat portion 10 moves forward to stabilize the sitting posture and to watch a game or the like The aim is to improve the ability to follow the movement of the person corresponding to the emotions of the time, to leave the seat or to stand up. That is, as the movement of the seat portion 10, for example, it is possible to provide a comfortable sitting comfort in a limited installation space even though the seat portion 10 does not have a forward / backward slide function. Therefore, the seat structure 1 of the present embodiment is suitable for use as a rear-row viewing seat in a VIP seat or the like that is arranged in a stepped platform. For example, when an invitee who welcomes an invitee sits down, the invitee often leaves and passes in front of other seats more frequently than the invitee for entertainment. In this respect, since the seat structure 1 of the present embodiment requires a limited installation space, it is easy for a person to pass in front of a seated person. On the other hand, since it can provide a comfortable sitting comfort, it is suitable as a rear-row viewing seat in a VIP seat or the like.

  Of course, the seat structure 1 of the present embodiment can be used in a front row (front row facing the ground or the like) having a larger space than the rear row in a VIP seat or the like. However, since the front row has a relatively large installation space and is often used by invited guests on the front side, the seat structure 1000 that can be seated more relaxedly can be used. For example, the seat structure 1000 can be used so that the user can slide the seat portion 1100 and the backrest 1200 forward when watching the game. Then, the seat structure 1000 that can slide the seat portion 1100 and the backrest 1200 back and forth is used as the first seat structure installed in the front row seat, and the seat portion 10 and the backrest 20 according to the above embodiment slide back and forth. Without using the seat structure 1 having the function of turning the seat portion 10 in the forward tilt direction as the second seat structure installed in the rear row of the viewing seat, the invitee and the invitee The arrangement structure of the bleachers suitable for use can be obtained.

  An embodiment of a seat structure 1000 suitable as a first seat structure installed in a front row seat will be described with reference to FIGS. The seat structure 1000 includes a seat 1100, a backrest 1200, and left and right legs 1300, 1300. Support frames 1310 and 1310 are disposed between the left and right legs 1300 and 1300 with a space in the front-rear direction. The lower rails 1410 and 1410 of the slider 1400 are spaced apart from the support frames 1310 and 1310 in the width direction by a predetermined distance. Attached. Upper rails 1420, 1420 that slide along the lower rails 1410, 1410 are provided, and side frames 1111, 1111 on both sides constituting the seat frame 1110 of the seat 1100 are coupled to the upper rails 1420, 1420. The The slider 1400 is provided with a lock mechanism 1430 that locks the upper rails 1420 and 1420 at desired positions with respect to the lower rails 1410 and 1410, and an operation lever 1440 that operates the lock mechanism 1430 is provided below the front edge of the seat 1100. It is provided so as to protrude.

  The seat frame 1110 includes a front frame 1112 disposed in the width direction, and a rear frame 1113 disposed behind the front frame 1112 at a predetermined interval. A planar member 1120 made of a two-dimensional fabric or the like similar to that in the above embodiment is stretched between the rear frames 1113. The planar member 1120 is hung from the upper side between the front frame 1112 and the rear frame 1113, and a planar member expansion / contraction member 1121 made of a coil spring is spanned between the end edges located on the lower side.

  The planar member 1120 supports a seat cushion member 1130 as in the above embodiment. The seat cushion member 1130 is also laminated on the lower layer cushion member 1131 made of bead foam, the middle layer cushion member 1132 made of a three-dimensional solid knitted fabric laminated on the lower layer cushion member 1131, and the middle layer cushion member 1132. Each is composed of a laminated structure with an upper cushion member 1133 made of a three-dimensional solid knitted fabric, and both are divided into two in the front-rear direction from the split position A in the middle in the front-rear direction of the seat portion 1100. The surface of the seat cushion member 1130 is covered with a skin material 1140.

  A plate-like back frame 1210 is connected to the seat frame 1110. The backrest 1200 includes a backrest cushion member 1220 such as a three-dimensional solid knitted fabric similar to the above-described embodiment supported by the backrest frame 1210, and a skin material 1230 provided on the surface thereof. Moreover, the back support member 1240 which can adjust height is provided similarly to the said embodiment.

  Also in the present embodiment, when a person is seated, as shown in FIG. 11, the seat cushion member 1130 sinks. At this time, the split position A is displaced downward most, and the seat moves toward the front and rear. It is deformed into a substantially concave shape so that the surface becomes higher. Therefore, the position of the center of gravity of the seated person is stable, the front part of the buttocks is not easily slipped, and a relaxed and stable seating posture can be maintained. Further, when the player is crazy about a game or the like and wants to move forward, the operation lever 1440 of the slider 1400 is operated to release the lock, and the buttock is shifted forward. Thereby, the seat part 1100 and the backrest 1200 move forward. Therefore, it is possible to watch a game such as looking under a game under the eyes. As shown in FIGS. 12 and 13, the seat structure 1000 according to the present embodiment can also include a plurality of sets of a seat portion 1100 and a backrest 1200 via a leg portion 1300. In this case, Support frames 1310 and 1310 for supporting the slider 1400 are provided so as to straddle each set.

  Since the seat structure 1000 of this embodiment has the slider 1400, the seat 1100 and the backrest 1200 can be slid back and forth to watch a game or the like at a desired position, and is suitable for a front row seating area with a wide installation space. ing. Then, the seat structure 1 of the above embodiment is arranged in the rear row of the audience seats, and the arrangement structure is a combination of the two so that the invited guests on the VIP seat or the like are in a relaxed posture and the desired position On the other hand, inviting guests on the hospitality side can also watch the game in their favorite posture in a limited space. In addition, the seat structure 1 of the above embodiment is suitable for use as a rear row seat because it can easily stand up. Therefore, the seat structure 1000 of the present embodiment suitable for the first seat structure installed in the front row of the bleaching seat and the seat structure 1 of the above embodiment suitable for the second seat structure of the rear row of the viewing seat are provided. The combined arrangement structure is suitable as an arrangement structure for a viewing seat in a VIP seat or the like. 14 to 16 show an example of the arrangement structure. FIG. 14 is a plan view of the seat structure 1000 on the left side of the front row, in which the seat portion 1100 and the backrest 1200 are slid forward, and the other seat structures 1000 are positioned rearward without being slid. FIG. 15 shows a state in which the seat portion 1100 and the backrest 1200 are positioned rearward in the seat structure 1000 in the front row, and the seat portion 10 is seated without being tilted forward in the seat structure 1 in the rear row. FIG. 16 shows a state in which the seat portion 1100 and the backrest 1200 are slid forward in the seat structure 1000 on the left side of the front row, and the seat portion 10 is seated with the seat portion 10 tilted forward in the rear row seat structure 1.

DESCRIPTION OF SYMBOLS 1,1000 Seat structure 10,1100 Seat part 11,1130 Seat cushion member 12 Cushion member support mechanism 121 Plate-like body 122,1112 Front frame 123,1113 Rear frame 124 Lower frame 125 Rotating connecting member 129 Forward tilt restriction Telescopic members 130, 1120 Planar members 131, 1121 Stretch members for planar members 20,1200 Backrest 30, 1300 Legs 32 Support shafts 33 Sliding members

Claims (9)

A seat structure including a seat, a backrest, and legs that support the seat and the backrest at a predetermined height,
The seat portion is configured to include a cushion member for a seat portion and a cushion member support mechanism that supports the cushion member for the seat portion,
A support shaft provided along the width direction and supported by the leg portion at a position spaced downward from the cushion member for the seat portion;
A rotation connecting member that rotatably connects the cushion member support mechanism along the outer peripheral surface of the support shaft;
The seat cushion member has a structure divided halfway in the front-rear direction, and the division position is set immediately above or in front of the rotation center of the rotation connecting member that rotates around the support shaft, The seat part is rotatable in a forward tilt direction together with the cushion member for the seat part and the cushion member support mechanism ,
The cushion member support mechanism is
A planar member that supports the lower surface of the cushion member for the seat,
A front frame and a rear frame that are arranged substantially in parallel in the front-rear direction, the planar member is spanned, and a frictional force is generated between the planar member and the planar member. When,
An expansion member for a planar member that is connected to the planar member and that expands and contracts in response to a downward displacement of the seat cushion member and exhibits at least one of an elastic force or a damping force;
A seat structure characterized by having a structure.   When the division position of the cushion member for the seat portion is set in front of the rotation center of the connecting member for rotation, it reaches from the immediately above to a length corresponding to the rotation radius of the connecting member for rotation. The seat structure according to claim 1, which is set in a range of. A lower frame disposed substantially parallel to the front frame at a position spaced downward from the front frame;
The planar member is hung on the front frame, the rear frame, and the lower frame, and the edge that is hung from the upper side of the rear frame and the edge that is hung from the lower side of the lower frame The seat structure according to claim 1 or 2 , wherein the expansion member for a planar member is stretched between the two portions. Between the backrest or the leg part, the part located behind the seat part and the cushion member support mechanism are expanded and contracted to regulate the forward tilt angle, and either elastic force or damping force 4. The seat structure according to any one of claims 1 to 3, wherein a forward tilt restricting expansion / contraction member that exhibits at least one function is stretched. The seat structure according to any one of claims 1 to 4 , wherein a height-adjustable backrest member is provided on the backrest. An arrangement structure of a bleacher seat, in which a plurality of rows of bleachers are arranged,
A first seat structure including a seat portion, a backrest, and a leg portion that supports the seat portion and the backrest at a predetermined height; and the seat portion and the backrest slide back and forth;
A second seat structure in which the seat portion and the backrest do not slide back and forth, and the seat portion has a function of rotating in the forward tilt direction;
Are used in combination,
The first seat structure is arranged as a front row seat, and the second seat structure is arranged as a second row seat. The second seat structure is :
The seat portion is configured to include a cushion member for a seat portion and a cushion member support mechanism that supports the cushion member for the seat portion,
A support shaft provided along the width direction and supported by the leg portion at a position spaced downward from the cushion member for the seat portion;
A pivot connecting member that pivotably couples the cushion member support mechanism along the outer peripheral surface of the support shaft;
Have
The seat cushion member has a structure divided halfway in the front-rear direction, and the division position is set immediately above or in front of the rotation center of the rotation connecting member that rotates around the support shaft, The arrangement structure of a bleacher seat according to claim 6, wherein the seat portion is rotatable in a forward tilt direction together with the cushion member for the seat portion and the cushion member support mechanism . The seat structure according to claim 6 , wherein the seat structure according to any one of claims 1 to 5 is used as the second seat structure. The first seat structure includes:
A cushion member for a seat with a structure divided in the middle in the front-rear direction;
A front frame and a rear frame that are arranged substantially in parallel in the front-rear direction at a predetermined interval;
A planar member that spans between the front frame and the rear frame and supports the lower surface of the cushion member for the seat;
A planar member expansion / contraction member connected to the planar member and extending / contracting according to the downward displacement of the seat cushion member and exhibiting at least one of an elastic force and a damping force. The arrangement structure of the bleachers according to any one of claims 6 to 8 .