JP4765086B2 - Standing upright chair and sitting upright unit - Google Patents

Description

  This invention includes chairs combined with student desks at schools, conference halls and theater chairs, stadium viewing chairs, various working chairs such as drafting, vehicle chairs such as trains, stations, parks, etc. The present invention relates to a seat standing type chair used as various chairs such as a waiting chair in a public facility and a seat standing unit used for the seat standing type chair.

  As a conventional seat upright chair, for example, the one previously disclosed in Patent Document 1 by the applicant of the present application is known, and this seat upright chair can be used in combination with a desk in a classroom or an auditorium. It is installed in a row, and it is connected to the leg of the desk on the back seat via the leg side bracket and connected to the lower surface of the seat on the front seat via the seat side bracket. Each of the four link links constitutes a four-bar link, and the two four-bar links serve as a seat for the front seat, and the seat is generally diagonally forward of the seat between a substantially horizontal use position and a substantially vertical standing position. By swinging in a pendulum shape with the upper position as a virtual center and supporting it to move backward and upward from the use position toward the standing position, and by a standing spring inserted between the leg side bracket and the left and right link members , Always urging the seat toward the standing position There.

  With such a configuration, the seat-standing chair can follow the movement of the seat in the natural seating and standing-up motion of the person, so that the person can smoothly take off and put on, and the seat stands up from the use position. Compared to a normal standing chair that moves upward toward the position, even if the seat and desk are in the same position, the seat at the intermediate position between the used position and the standing position Since the space between the desk and the desk becomes wide, when a person sits and stands up, the situation where the person is pinched with an unnatural posture between the seat and the desk like a normal sitting upright chair is eliminated. Can do.

JP-A-4-367622

  By the way, the inventor of the present application has further studied the above-described conventional seat-standing chair, and found the following room for improvement. That is, in the above-mentioned conventional seat-upright chair, since the seat is supported by forming a four-bar link with two sets of left and right link members in order to give the seat a pendulum-like movement, the links There is a disadvantage that the number of parts of the members and the dedicated parts such as the shaft member and the bearing member for supporting the members increases and the manufacturing cost increases.

  In addition, because it is necessary to link the left and right four-bar links to smooth the movement of the seat, the left and right link members are fixed to a common shaft member inserted through the seat side or leg side bracket when assembling the chair. There is also a disadvantage that it takes time to assemble.

  The present invention advantageously solves the problems of the conventional seat upright chair, and the seat upright chair of the present invention includes one seat, one leg, and a leg attached to the leg. One set of left and right links is connected to the leg via a side bracket and the other end is connected to the seat via a seat side bracket attached to the back of the seat. The member constitutes two left and right four-joint links together with the seat and the legs, and the four-joint links form the seat between the substantially horizontal use position and the substantially vertical standing position. A seat upright chair comprising: a seat swing support means that swings in a pendulum shape with a diagonally upper front position of the seat as an imaginary center and that moves backward from the use position toward the standing position. The front and rear two of the seat swing support means One of the pair of link members is one common link member common to the two left and right sets, and the other of the two front and rear link members of the seat swing support means is the left and right Two link portions that respectively constitute two sets of two link members, and one shaft portion that extends in the left-right direction of the seat and joins the end portions on the seat side of the link portions. A first U-shaped link member formed on each of the seat-side bracket and the back surface of the seat, the seat-side bracket being attached to the back surface of the seat, The first bearing portion of the seat-side bracket sandwiches the shaft portion of the U-shaped link member between the first bearing portion on the back surface of the seat.

  Further, the seat upright unit for a seat upright chair according to the present invention includes a leg side bracket attached to the leg, a seat side bracket attached to the back surface of the seat, and one end portion on the leg via the leg side bracket. Are connected to the seat via the seat-side bracket, and two sets of left and right link members are connected to the seat. The link member, together with the seat and the leg, constitutes a left and right four-joint link, and the seat is constituted by the four-joint link, and the seat is generally between a substantially horizontal use position and a substantially vertical standing position. In the seat standing unit for a seat standing type chair that swings in a pendulum shape with an obliquely upper front position of the seat as a virtual center, and supports to move backward from the use position toward the standing position, Said moving support means One of the rear two sets of link members is one common link member common to the left and right two sets, and the other of the front and rear two sets of link members of the seat swing support means However, the two link portions that constitute the two sets of the left and right two link members respectively, and the one that extends in the left-right direction of the seat and connects the end portions on the seat side of the link portions. A first U-shaped link member integrally formed on the seat-side bracket and the back surface of the seat, and the seat-side bracket is attached to the back surface of the seat. Thus, the first bearing portion of the seat-side bracket sandwiches the shaft portion of the U-shaped link member between the first bearing portion on the back surface of the seat.

  According to the seat upright chair and the seat upright unit for the seat upright chair according to the present invention described above, two sets of left and right links are formed by one set of two front and rear constituting the left and right four-joint links of the seat swing support means. Since the member is composed of one common link member and one U-shaped link member, the number of dedicated parts such as the link member and the shaft member and the bearing member that support the link member are reduced, The manufacturing cost of the chair can be reduced.

  In addition, in order to make the movement of the seat smooth, it is necessary to link the left and right four-bar links, and one common link member also connects the end portions on the seat side of the two link portions at the shaft portion. Since each of the U-shaped link members interlocks the left and right four-bar links, when assembling the chair, one common link member is connected to the back surface of the seat with the seat side bracket, and the seat side bracket Since the shaft portion of one U-shaped link member only needs to be sandwiched between the first bearing portion and the first bearing portion on the back surface of the seat, it is possible to reduce the work of assembling. Manufacturing costs can be reduced.

  In the seat upright chair according to the present invention, a second bearing portion is formed on each of the seat side bracket and the back surface of the seat, the seat side bracket is attached to the back surface of the seat, and the seat side The second bearing portion of the bracket may sandwich the support shaft provided at the end portion on the seat side of the common link member between the second bearing portion on the back surface of the seat. According to this configuration, the support shaft provided at the seat-side end of the common link member is also seated between the second bearing portion of the seat-side bracket and the second bearing portion on the back surface of the seat. Since it can be connected to the back surface of the chair, it is possible to reduce the labor of assembling and to reduce the manufacturing cost of the chair.

  Further, in the seat upright chair according to the present invention, an upright spring having one end hooked on the common link member is inserted into the support shaft, and a screw member inserted from the outside into the seat side bracket is inserted into the support shaft. The nut screwed inside the seat side bracket is regulated in rotation by the seat side bracket and guided to move in the extending direction of the screw member, and the other end of the standing spring is connected to the nut. It may be hooked. According to such a configuration, the seat can be automatically returned to the standing position by the standing spring when the seated person is separated, and the weight of the seat varies depending on the presence or absence of the pad and the screw member is rotated to screw the nut. Since the strength of the return force of the standing spring can be adjusted by moving the member in the extending direction, the strength of the return force of the standing spring can be easily set to an appropriate strength according to the weight of the seat. it can.

  Further, in the seat upright chair according to the present invention, the seat is molded, and the seat upright chair further includes a single molded back, and the back has a single body. A bracket may be coupled to the leg and the spine may be fixed to the leg. According to such a configuration, since the seat is molded, the first bearing portion and the second bearing portion can be integrally formed on the back surface of the seat, and the back is also molded, so that the bracket can be integrally formed on the back. Thus, the manufacturing cost of the chair can be reduced by reducing the number of parts.

  Furthermore, in the seat upright chair according to the present invention, a hooking hole is formed in the leg, and at least one of the leg side bracket and the back bracket is hooked with the hooking hole and the leg side bracket or A temporary holding member for temporarily holding the back bracket may be provided. According to such a configuration, it is possible to attach a mounting member such as a bolt while temporarily holding the leg side bracket or the back bracket on the leg by engaging the temporary holding member with the engagement hole of the leg. The attachment work of the leg side bracket and the back to the leg can be facilitated.

  In the seat upright chair according to the present invention, a foot having a width of 1/3 to 1/4 of the width of the seat may be fixed to the lower end portion of the leg. According to such a configuration, since the support rigidity in the lateral direction of the legs is increased by fixing the feet to the floor surface, it is necessary to provide a penetrating material for connecting the chairs when the chairs are installed side by side. As a result, the number of parts and the labor for assembly can be reduced, and the manufacturing cost of the chair can be reduced.

It is a front view which shows one Example of the seat standing type chair of this invention in the state combined with the horizontally long desk. It is a top view which shows the seat standing type chair of the said Example in the state combined with the horizontally long desk. It is a side view which shows the seat standing type chair of the said Example in the state combined with the horizontally long desk. (A), (b) is the side view and bottom view which show the shape of the seat of the seat standing type chair of the said Example. (A), (b), (c) is the top view, back view, and side view which show the shape of the back of the seat stand-up type chair of the said Example. It is a side view shown in the state where the seat upright unit of the seat upright type chair of the above-mentioned example was attached to the seat. It is a side view which shows independently the seat upright unit of the seat upright type chair of the said Example. (A), (b), (c), (d), (e) are a plan view, a front view, a side view, a rear view, and a shape of a leg-side bracket of the seat-standing chair of the above embodiment. It is a bottom view. (A), (b), (c) is the top view, side view, and bottom view which show the shape of the seat side bracket of the seat standing type chair of the said Example. It is decomposition | disassembly explanatory drawing which shows the connection method of the common link member and the U-shaped link member to the leg side bracket of the seat standing type chair of the said Example. It is a top view which shows the connection method of the common link member to the seat side bracket of the seat standing type chair of the said Example, and a U-shaped link member. It is decomposition | disassembly explanatory drawing which shows the structure of the return spring attached to the leg side bracket of the seat stand-up type chair of the said Example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1, 2, and 3 are a front view, a plan view, and a side view, respectively, showing an embodiment of the seat-standing chair according to the present invention in combination with a horizontally long desk. Similarly to the above-described conventional example, the seat-standing chair is installed in a plurality of rows in combination with a horizontally long desk in a classroom or an auditorium. In the figure, reference numeral 1 denotes a seat-standing chair of the embodiment, Reference numeral 23 denotes a desk.

  Here, the seats in the front row (the left side in FIGS. 2 and 3) are the floors where the desk 23 is fixed to the floor F alone and the upright chair 1 is combined with the desks 23 in the rear row. The seat in the middle row (the center in FIGS. 2 and 3) is fixed to F, and the seat standing chairs 1 combined with the desk 23 in the rear row are arranged in front and back, and fixed to the floor F. In the last row (the right side in FIGS. 2 and 3), the desk 23 combined with the seat upright chair 1 of the front seat is fixed to the floor F and the seat upright chair 1 alone is the floor surface. The seat standing type chair 1 fixed to F and combined with the desk 23 is different from the single seat standing type chair 1 only in the configuration of the upper end of the leg, and the other parts are configured in the same manner. Has been.

  That is, the seat-standing chair 1 of this embodiment includes one seat 2, one back 3, and one leg 4, both in combination with the desk 23 and alone. Yes. Furthermore, the seat-upright chair 1 of this embodiment has a leg-side bracket 5 attached to the leg 4 and a seat-side bracket 6 attached to the back surface 2c of the seat 2 as a seat swing support means. The seat upright unit 7 includes a left and right four-joint link, and the seat 2 is a substantially horizontal use position shown in the central chair 1 in FIG. 3 and the right chair in FIG. 1 is supported in such a manner that it swings in a pendulum-like manner, with the front obliquely upper position of the seat as a virtual center, and moves backward from the use position toward the standing position.

  4 (a) and 4 (b) are a side view and a bottom view, respectively, showing the shape of the seat 2 of the seat-standing chair 1 of the above embodiment, and the seat 2 here is made by injection molding synthetic resin. It has a seat surface 2a having a deeper round shape along the human body than a conventional plywood seat, and a back surface 2c having ribs 2b for supporting the seat surface 2a. The rib 2b of the back surface 2c forms a semicircular first bearing portion 2d and a second bearing portion 2e that are semi-circular in the upper half when viewed from the side where the central axis extends in the left-right direction of the seat 2. Further, the rib 2b of the back surface 2c is used to fix two elastic stoppers (not shown) that abut against a later-described U-shaped link member and hold the seat 2 in the use position when the seat 2 moves to the use position. Two stopper receiving portions 2f which are rectangular concave portions are also formed.

  5 (a), (b) and (c) are a plan view, a rear view and a side view, respectively, showing the shape of the back 3 of the seat upright chair 1 of the above embodiment. It is formed by injection molding synthetic resin, and has a receiving surface 3a having a deep round shape along the human body more than a conventional plywood back, and a rib 3b for supporting the receiving surface 3a, and It has a back surface 3e integrally having a bracket 3c coupled to the rib 3b and a columnar temporary holding projection 3d as a temporary holding member that protrudes rearward inside the bracket 3c. A plurality of ribs 3b extend horizontally in a row like a fin for heat dissipation.

  FIG. 6 and FIG. 7 are side views showing a state where the seat standing unit 7 of the seat standing type chair 1 of the above embodiment is attached to the seat 2 and a side view respectively, and the seat standing unit 7 here is a leg side bracket. In addition to 5 and the seat-side bracket 6, it has one common link member 8 and one U-shaped link member 9 for constituting the left and right four-joint links.

  8 (a), (b), (c), (d) and (e) are a plan view, a front view, a side view, a rear view and a bottom view showing the shape of the leg bracket 5, respectively. The leg-side bracket 5 is formed by casting an aluminum alloy, and has two support shaft attachment portions 5a for the U-shaped link member 9 and two bearing portions 5b for the common link member 8 on the front side. And a leg mounting portion 5c having a groove shape with a U-shaped cross section on the back side, and a screw portion 5d for mounting the return spring 10 shown in FIGS. And an opening 5e for projecting the return piece 11 attached to the return spring 10 to the front side, and a screw part 5f for attaching a temporary holding screw 12 as a temporary holding member shown in FIGS.

  FIGS. 9A, 9B, and 9C are a plan view, a side view, and a bottom view showing the shape of the seat-side bracket 6, wherein the seat-side bracket 6 is formed by injection molding synthetic resin. In the state where the seat-side bracket 6 is fixed at a predetermined position on the back surface 2c of the seat 2, the circular bearings are respectively opposed to the first bearing portion 2d and the second bearing portion 2e of the back surface 2c of the seat 2 respectively. Each having a lower half semicircular first bearing portion 6a and a second bearing portion 6b as seen from the side of the seat 2 extending in the left-right direction, and the first bearing portion 6a It has an arc-shaped pressing portion 6 c that cooperates to hold the shaft portion 9 b of the U-shaped link member 9.

  Further, the seat-side bracket 6 has a screw hole 6d through which the standing force adjusting screw 13 shown in FIGS. 6 and 7 is inserted as a screw member, and the outside of the seat-side bracket 6 in the screw hole 6d (in FIG. 9B). The standing force adjusting screw 13 inserted from the lower side and the nut 14 screwed inside the seat side bracket 6 (upper side in FIG. 9B) are moved along the standing force adjusting screw 13 while restricting the rotation thereof. The nut guide groove 6e to be moved and the one end portion 15a of the standing spring 15 shown in FIGS. 6 and 7 are moved adjacent to the guide groove 6e along the standing force adjusting screw 13 while being held in the state of being hooked to the nut 14. The spring end guide groove 6f and six bolt holes 6g for fixing the seat side bracket 6 to the back surface 2c of the seat 2 are provided.

  The common link member 8 is formed by flattening one end of a straight round pipe as shown in FIGS. 6, 7, and 10. The support shaft 16 is inserted into the through hole formed in the side end portion 8a, and the support shaft 16 is hooked on the second bearing portion 2e of the seat side bracket 6, and the leg side end which is the other end portion. The portion 8b is disposed with the spacer 17 between the two bearing portions 5b of the leg side bracket 5, and is inserted into through holes formed in the bearing portion 5b, the spacer 17, and the leg side end portion 8b, respectively. It is pivotally supported on the leg-side bracket 5 by a fixed support shaft 18. Two upright springs 15 each consisting of a coil spring are inserted through a sleeve 19 into the support shaft 16 projecting on both sides of the seat side end 8a, and the one end 15a of the upright springs 15 is The nut 14 is hooked, and the other end 15b is hooked into hook holes formed at a plurality of positions on both sides of the seat side end 8a.

  Further, as shown in FIGS. 6, 7 and 11, the U-shaped link member 9 is formed by bending a round pipe into a U-shape, thereby extending the two link portions 9 a and the seat 2 in the left-right direction. And is formed so as to integrally have one shaft portion 9b that joins the ends of the link portions 9a on the seat 2 side, and welds sleeves to both ends of the round pipe. , Two bearing portions 9c are provided at the end opposite to the shaft portion 9b, and as shown in FIG. 10, a support shaft 21 inserted through the bush 20 through the bearing portions 9c, Each of the leg-side brackets 5 is pivotally supported by the leg-side bracket 5 by being screwed to the two support shaft attachment portions 5a, and the shaft portion 9b is connected to the first bearing of the seat-side bracket 6 as shown in FIG. Pushed between the part 6a and the arc-shaped pressing part 6c. Retained.

  As shown in FIG. 6, when the seat-side bracket 6 is attached to a predetermined position on the back surface 2 c of the seat 2 with a set screw, the seat upright unit 7 having such a configuration has a U-shaped first bearing portion 6 a. The shaft portion 9 b of the link member 9 is rotatably held between the first bearing portion 2 d of the back surface 2 c of the seat 2, and the second bearing portion 6 b of the seat side bracket 6 is connected to the common link member 8. The support shaft 16 provided at the end 8a on the seat side is rotatably held between the second bearing portion 2d on the back surface 2c of the seat 2.

  Further, as shown in FIGS. 6 and 7, a base portion of a return spring 10 made of a leaf spring as shown in FIG. 12 is attached to the screw portion 5 d on the back side of the seat side bracket 6, and a tip portion of the return spring 10 is attached. The return piece 11 attached with the screw 11a protrudes from the opening 5e of the seat side bracket 6 to the front side so as to contact the common link member 8 and return the seat 3 to the upright position. A felt 11b is attached to the surface so as to suppress the generation of abnormal noise when contacting the common link member 8.

  The seat upright chair 1 according to this embodiment is mounted with the leg side bracket 5 of the seat upright unit 7 fixed to a predetermined position of the leg 4 with a set screw and the bracket 3c of the back 3 of the leg 4 on the seat upright. The unit 7 is configured by being fixedly attached to a predetermined position above the attachment position of the unit 7 with a set screw, and at the time of the attachment, a temporary holding screw attached to the screw portion 5f on the back side of the seat side bracket 6 Another head 12 is inserted into a not-shown engagement hole formed on the leg 4 to be hooked on the edge of the hole, and a temporary holding projection 3d on the back surface 3e of the back 3 is formed on the leg 4. The leg-side bracket 5 and the spine 3 are temporarily held at predetermined positions until they are fixed by a set screw by being press-fitted into the engaging holes not to be engaged and being engaged with the edges of the holes. A substantially shield-shaped foot 22 having a width of 1/3 to 1/4 of the width of the seat 2 is fixed to the lower end of the leg 4.

  The seat upright chair 1 according to this embodiment is configured such that one end of the seat upright unit 7 is connected to the leg 4 via the leg side bracket 5 attached to the leg 4 and attached to the back surface 2c of the seat 2. The left and right four-joint links are formed together with the seat 2 and the leg 4 by two sets of left and right link members 8 and 9 that are connected to the seat 2 via the side bracket 6 at the other end. Since the seat 2 is supported by these four-bar links, the seat 2 swings in a pendulum shape between the substantially horizontal use position and the substantially vertical standing position, with the front obliquely upper position of the seat 2 as a virtual center. Then, when moving from the use position toward the standing position, it moves backward and upward.

  The standing position is a state in which the return spring 10 abuts the return piece 11 at the tip thereof against the common link member 8 and pushes the seat 3 slightly forward so that a person can easily push down the seat 3 with the buttocks. In this seat standing unit 7, the seat 2 is further separated from the desk 23 by pushing the seat 2 backward against the return spring 10 from the standing position, so that the seat 2 is further separated from the desk 23. If the seat 2 is stopped from being pushed backward, the seat 2 is pushed back by the return spring 10 and returned to the standing position.

  Therefore, according to the seat upright chair 1 and the seat upright unit 7 of this embodiment, the movement of the seat 2 can be made to follow the seating and standing up motions of the person in a natural posture, so that the person can be separated smoothly. Even if the distance between the seat 2 and the desk 23 in the use position is the same as that of a normal seat standing type chair that can be seated and the seat 2 moves upward from the use position toward the standing position, Since the space between the seat 2 and the desk 23 at a position intermediate between the use position and the standing position is wide, when the person is seated and standing up, the seat 2 and the desk are like a normal upright chair. It is possible to eliminate a state in which a person is sandwiched between 23 and 23 in an unnatural posture.

  In addition, according to the seat upright chair 1 and the seat upright unit 7 of this embodiment, two sets of left and right link members are formed by two sets of front and rear that constitute the left and right four-joint links of the seat upright unit 7. Since the common link member 8 and the single U-shaped link member 9 are configured, the number of dedicated members such as the link members 8 and 9 and the shaft members and bearing members that support the link members 8 and 9 is reduced. The manufacturing cost of the chair 1 can be reduced. Further, as described above, two sets of left and right link members are composed of one common link member 8 and one U-shaped link member 9 in a pair of two front and rear, so a pair of two front and rear links. When the seat 2 moves between the use position and the standing position, the gap between the members and between the two right and left link members, that is, the gap between the common link member 8 and the U-shaped link member 9 can be made sufficiently large. Further, there is little or no possibility that a finger or an object is caught between the link members.

  Further, in order to make the movement of the seat smooth, it is necessary to interlock the left and right four-bar links, and one common link member 8 is also formed by connecting the end portions on the seat 2 side of the two link portions 9a to the shaft portion. Since each of the U-shaped link members 9 joined at 9b interlocks the left and right four-bar links, when assembling the chair 1, one common link member 8 is attached to the back surface of the seat 2 by the seat side bracket 6. 2c, and the first bearing portion 6a of the seat-side bracket 6 only holds the shaft portion 9b of the U-shaped link member 9 between the first bearing portion 2d of the back surface 2c of the seat 2. Therefore, it is possible to reduce the assembling work and to reduce the manufacturing cost of the chair 1 in this respect.

  In the seat upright chair 1 and the seat upright unit 7 of this embodiment, the second bearing portions 6b and 2e are formed on the seat side bracket 6 and the back surface 2c of the seat 2, respectively. The second bearing portion 6b of the seat-side bracket 6 attached to the back surface 2c and the support shaft 16 provided at the end portion 8a on the seat 2 side of the common link member 8 are also the second bearing portion of the back surface 2c of the seat 2. Since it can be connected to the back surface 2c of the seat 2 simply by being sandwiched between the seat 2e, the labor for assembling can be reduced and the manufacturing cost of the chair 1 can be reduced in this respect as well.

  Furthermore, according to the seat upright chair 1 and the seat upright unit 7 of this embodiment, the upright spring 15 having the one end portion 15b hooked to the common link member 8 is inserted into the support shaft 16, and the seat side bracket 6 is inserted into the seat side bracket 6. A nut 14 screwed inside the seat side bracket 6 to the standing force adjusting screw 13 inserted from the outside is restricted in rotation by the seat side bracket 6 and extends in the extending direction of the standing force adjusting screw 13. Since the movement is guided and the other end 15a of the standing spring 15 is hooked on the nut 14, the seat 2 can be automatically returned to the standing position by the standing spring 15 when the seated person leaves the seat. The weight of the seat 2 varies depending on the presence or absence of a pad, and the strength of the return force of the standing spring 15 is adjusted by rotating the standing force adjusting screw 13 and moving the nut 14 in the extending direction of the standing force adjusting screw 13. can it be done , Easily the strength of the restoring force of the upright spring 15 can be set to an appropriate intensity depending on the weight of the seat 2. And in the seat stand-up type chair 1 of this Example, the standing spring 15 is arrange | positioned inside the seat side bracket 6, and a return torque is given to the seat 2 side edge part 8a of the common link member 8 from the standing spring 15. Since the load of the standing spring 15 is reduced, the standing spring 15 can be made more compact than before.

  In addition, according to the seat upright chair 1 of this embodiment, the seat 2 is molded, and the seat upright chair 1 further includes one molded back 3, and the back 3 Since the seat 3 is molded because the back 3 is fixed to the leg 4 because the back 3 is fixed to the leg 4 with the bracket 3c that is integrally formed with the leg 4, the first bearing portion 2d and the second bearing portion are formed on the back surface 2c of the seat 2. 2e can be formed integrally, and the back 3 is also molded, so that the bracket 3c can also be formed integrally with the back 3, and the manufacturing cost of the chair 1 can be reduced by reducing the number of parts.

  Furthermore, according to the seat upright chair 1 of this embodiment, the leg 4 is formed with an engaging hole, and the leg side bracket 5 and the bracket 3c of the back 3 are engaged with the engaging hole and temporarily hold them. Since the temporary holding screw 12 and the temporary holding projection 3d are provided as the temporary holding members, the leg-side bracket 5 and the back 3 can be obtained by engaging the temporary holding screw 12 and the temporary holding projection 3d with the engaging holes of the legs 4. Since the attachment member such as a bolt can be attached while the bracket 3c is temporarily held on the leg 4, the attachment work of the leg side bracket 5 and the back 3 to the leg 4 can be facilitated. it can.

  And according to the seat standing type chair 1 of this embodiment, a substantially shield-shaped foot 22 having a width of 1/3 to 1/4 of the width of the seat 2 is fixed to the lower end portion of the leg 4. Then, since the supporting rigidity in the lateral direction of the legs 4 is increased by fixing the feet 22 to the floor surface F, it is necessary to provide a penetrating material for connecting the chairs 1 to each other when the chairs 1 are installed side by side. As a result, it is possible to reduce the number of parts and the time and effort of assembly, and to reduce the manufacturing cost of the chair 1.

  As shown in FIG. 3, when a single chair 1 is configured, a cap is provided at the upper end of the leg 4, and when the chair 1 is combined with the desk 23, the top plate 24 is fixed to the upper end of the leg 4. To do.

  Although the present invention has been described based on the illustrated examples, the present invention is not limited to the above-described examples, and can be appropriately changed within the scope of the claims. For example, the common link member 8 and the U-shape The link member 9 can be interchanged between front and rear, and the material of each member can be changed as appropriate. Furthermore, the desk combined with the chair 1 can be changed from a long desk 23 spanning a plurality of seats in the illustrated example to a narrow one for one person.

  Thus, according to the seat upright chair and the seat upright unit for the seat upright chair according to the present invention, two sets of left and right link members are formed by two sets of front and rear, which constitute the left and right four-joint links of the seat swing support means. Is composed of one common link member and one U-shaped link member, so that the number of parts of the dedicated members such as the link member and the shaft member and bearing member for supporting the link member can be reduced. The manufacturing cost can be reduced.

  In addition, in order to make the movement of the seat smooth, it is necessary to link the left and right four-bar links, and one common link member also connects the end portions on the seat side of the two link portions at the shaft portion. Since each of the U-shaped link members interlocks the left and right four-bar links, when assembling the chair, one common link member is connected to the back surface of the seat with the seat side bracket, and the seat side bracket Since the shaft portion of one U-shaped link member only needs to be sandwiched between the first bearing portion and the first bearing portion on the back surface of the seat, it is possible to reduce the work of assembling. Manufacturing costs can be reduced.

  And according to the seat upright unit of this invention, the seat upright type chair which attached the seat of a different specification according to an order can be easily manufactured in a short period of time by assembling the seat upright unit beforehand. .

DESCRIPTION OF SYMBOLS 1 Seat standing type chair 2 Seat 2a Seat surface 2b Rib 2c Back surface 2d 1st bearing part 2e 2nd bearing part 2f Stopper receiving part 3 Back 3a Reception surface 3b Rib 3c Bracket 3d Temporary holding protrusion 3e Back surface 4 Leg 5 Leg side bracket 5a Support shaft mounting portion 5b Bearing portion 5c Leg mounting portion 5d Screw portion 5e Opening portion 5f Screw portion 6 Seat side bracket 6a First bearing portion 6b Second bearing portion 6c Holding portion 6d Screw hole 6e Nut guide groove 6f Spring end guide Groove 6g Bolt hole 7 Seat standing unit 8 Common link member 8a Seat side end portion 8b Leg side end portion 9 U-shaped link member 9a Link portion 9b Shaft portion 9c Bearing portion 10 Return spring 11 Return piece 11a Screw 11b Felt 12 Temporary holding Screw 13 Standing force adjusting screw 14 Nut 15 Standing spring 15a One end portion 15b The other end 16 support shaft 17 spacer 18 support shaft 19 sleeve 20 bush 21 supporting shaft 22 foot 23 desk 24 top plate
F floor

Claims (7)

One seat (2),
One leg (4),
One end is connected to the leg via a leg-side bracket (5) attached to the leg, and the other end to the seat via a seat-side bracket (6) attached to the back surface (2c) of the seat. The left and right four-links together with the seat and the legs are constituted by two sets of left and right link members (8, 9) in a set of two front and rear, which are connected to each other. The seat swings in a pendulum shape between a substantially horizontal use position and a substantially vertical standing position, with the front obliquely upper position of the seat as a virtual center, and rises backward from the use position toward the standing position. Seat swing support means (7) for supporting movement;
In the standing chair (1) with
One of the front and rear two sets of link members of the seat swing support means is one common link member (8) common to the left and right sets,
The other of the pair of front and rear link members of the seat swing support means is the two link portions (9a) respectively constituting the two sets of left and right two link members, and the left and right direction of the seat A single U-shaped link member (9) integrally extending with one shaft portion (9b) extending to the seat side ends of the link portions.
First bearing portions (6a, 2d) are formed on the seat side bracket (6) and the back surface (2c) of the seat (2), respectively.
The seat side bracket (6) is attached to the back surface (2c) of the seat (2), and the first bearing portion (6a) of the seat side bracket is the shaft portion (9b) of the U-shaped link member (9). ) Between the first bearing portion (2d) on the back surface of the seat. Second bearing portions (6b, 2e) are formed on the seat-side bracket (6) and the back surface (2c) of the seat (2), respectively.
The seat-side bracket (6) is attached to the back surface (2c) of the seat (2), and the second bearing portion (6b) of the seat-side bracket is the end of the common link member (8) on the seat side. The seat upright chair according to claim 1, characterized in that a support shaft (16) provided in the section is sandwiched between a second bearing portion (2e) on the back surface of the seat. An upright spring (15) having one end (15b) hooked to the common link member (8) is inserted through the support shaft (16),
A nut (14) screwed inside the seat side bracket to a screw member (13) inserted from the outside into the seat side bracket (6) is restricted in rotation by the seat side bracket and the screw member. Is guided to move in the extending direction,
The seat upright chair according to claim 1 or 2, wherein the other end portion (15a) of the standing spring is hooked on the nut. The seat (2) is molded,
The upright chair (1) further comprises a molded back (3),
The bracket (3c) that the spine integrally has is joined to the leg (4), and the spine is fixed to the leg, according to any one of claims 1 to 3. Standing chair. A hooking hole is formed in the leg (4),
At least one of the leg-side bracket (5) and the back bracket (3c) is provided with a temporary holding member (12, 3d) for temporarily holding the leg-side bracket or the back bracket by engaging with the engagement hole. 5. The seat upright chair according to claim 4, further comprising:   The leg (22) having a width of 1/3 to 1/4 of the width of the seat is fixed to a lower end portion of the leg, according to any one of claims 1 to 5. The sitting upright chair described. A leg bracket (5) attached to the leg (4);
A seat side bracket (6) attached to the back surface (2c) of the seat (2);
One pair of front and rear is connected to the leg via the leg bracket (5) and the other end is connected to the seat via the seat bracket (6). A link member (8, 9),
The left and right two sets of link members in the front and rear two sets constitute the left and right four-joint links together with the seat and the legs, and the seat is substantially horizontal when the four-joint links are used. And a substantially vertical standing position that swings in a pendulum manner with the front obliquely upper position of the seat as an imaginary center, and is supported to move backward from the use position toward the standing position. In the chair upright unit (7)
One of the front and rear two sets of link members of the seat swing support means is one common link member (8) common to the left and right sets,
The other of the pair of front and rear link members of the seat swing support means is the two link portions (9a) respectively constituting the two sets of left and right two link members, and the left and right direction of the seat A single U-shaped link member (9) integrally extending with one shaft portion (9b) extending to the seat side ends of the link portions.
First bearing portions (6a, 2d) are formed on the seat side bracket (6) and the back surface (2c) of the seat (2), respectively.
The seat side bracket (6) is attached to the back surface (2c) of the seat (2), and the first bearing portion (6a) of the seat side bracket is the shaft portion (9b) of the U-shaped link member (9). 8) between the first bearing portion (2d) on the back surface of the seat, and the seat upright unit for a seat upright chair according to any one of claims 1 to 6.

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