JP2012110505A - Chair convertible into bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair with structure in which hands are not pinched even though the hands is erroneously inserted in a parts separated and coming in close contact with each other in converting operation of the chair convertible into a bed.SOLUTION: The chair convertible into the bed is constituted such that a seat face sheet 10, a backrest sheet 20, a back face sheet 30, and a chair body frame are connected with hinges in series, a carriage 40 is arranged below the seat face sheet, and can be converted to the bed by the seat face sheet 10 being drawn forward. The carriage 40 has an overhanging part 41 in a backrest sheet side, a cutout parts 42 into which distal end of hands can be inserted are arranged in both the upper side parts of the overhanging part 41, a support part is arranged in the inside of the distance where the distal end of the hand can not reach from both the upper sides.

Description

  The present invention relates to a chair that can be converted into a bed, and more particularly to a bed-combined chair that can be converted into a bed by pulling out the seating sheet by interlocking a backrest sheet and a seating sheet.

  Various types of sofas and chairs for bed use have already been commercialized and used in hospitals, workplaces and homes. Many of these are of the type that converts the back of a sofa or chair to a bed by increasing the mat surface area. However, these types require a certain amount of indoor space and are difficult to use in places where indoor space is limited such as hospital rooms and homes. Recently, private rooms are preferred in hospitals, and chairs for visitors and attendants are placed in hospital rooms in addition to patient beds. If these chairs can be converted into beds, it is easier to accompany them at night. Therefore, there has been a demand for a chair that can be converted into a bed and a chair even in a limited space.

  Up to now, the seat has been divided into three parts and connected with hinges, etc., respectively, as seat seat, back seat, back seat back seat, folding each seat into a chair (sofa), pulling out the seat seat, As shown in Patent Documents 1 to 7, many types of chairs that can be used as a bed by stretching each seat in a continuous plane have already been proposed.

  And in order to perform drawing of a seat surface sheet smoothly, what uses the base frame of the mount frame of a chair main body and the slide frame built in this frame is proposed in patent documents 1, One using a guide path provided on a chair base frame and a guide roller provided on a seat surface base frame is proposed, and Patent Document 3 discloses a leg portion and a caster on the lower surface of a seat surface sheet (mat). It has been proposed that the leg is lifted and the seat sheet is pulled out using the caster. Those described in Patent Documents 1 and 2 require a complicated configuration. In addition, these chairs can be easily converted into a bed by pulling out the seat surface sheet, but the seat surface sheet is horizontal because it becomes the bed surface when converted into a bed. When used, it is not necessarily a comfortable chair.

  Further, in Patent Document 4, a substantially triangular locking piece and a lock piece are combined and locked when used as a chair, and when used as a bed, the lock is released and the seat is released. A chair combined bed with a structure that pulls out the face sheet is shown. In this chair, since the seat surface seat is freely movable with a leg with a roller, the inclination of the seat surface seat remains flat, and it is not necessarily a comfortable chair as in Patent Documents 1 to 3. . Patent Documents 5 and 6 show a chair that can be reclined by adjusting the angle of the backrest with a lock mechanism, but the inclination of the seat is not adjusted. On the other hand, in Patent Document 7, when a wedge is inserted only at the front front end of the seat, and the front is lifted by the action of the wedge, the seat is inclined downward toward the backrest. A combined chair / bed is shown. When this was set as a chair, the front end of the seat was lifted from the carriage for movement, and a gap was formed between the carriage and the device to cover this gap.

  In addition, the chair that can be converted into a bed with a three-part seat that has been proposed so far requires power to fold and pull out and can be quickly, easily and safely switched by one person. It wasn't. For this reason, the applicant of the present application previously proposed a chair that can be converted into a bed (Japanese Patent Application No. 2009-208044). This chair could be quickly and easily switched between a comfortable easy chair and a comfortable bed, alone, placed in a small space, and easily moved.

Japanese Utility Model Publication No. 63-159548 Japanese Patent Publication No. 3-8762 JP-A-8-242773 Japanese Utility Model Publication No. 62-73751 Japanese Utility Model Publication No. 6-15556 Registered Utility Model No. 3063848 JP-A-57-134117

  In the bed and chair proposed by the prior art as described above and the applicant of the present application, the backrest seat and the seating seat are interlocked, and the seating seat is utilized by using a carriage provided at the lower part of the seating seat. By pulling out or pushing in, you can switch between bed and chair. However, this cart is provided with an overhang part, and the overhang part projects from the seat surface to the backrest seat side. Then, when the seat is pulled out and the backrest is leveled and converted into a bed, the connecting end of the backrest with the seat is supported by the overhang of the carriage so that the backrest remains horizontal. It has become. Therefore, there is a possibility that a hand is caught between the overhanging portion and the end portion of the backrest sheet during the conversion work.

  Therefore, the present invention is intended to provide a chair having a structure that is not sandwiched even if a hand is accidentally put between the overhanging portion of the carriage and the backrest seat when the chair is convertible to the bed. is there

  The chair that can be converted into the bed of the present invention has a seat surface seat, a backrest seat, a back seat, and a chair body frame sequentially connected with hinges, and a carriage is provided below the seat surface seat. Is a chair that can be converted into a bed by being pulled forward, and the carriage has a protruding portion on the backrest seat side, and is provided with a notch portion that is large enough to fit a hand on both upper sides of the protruding portion. And a support portion is provided within a distance that the hand cannot reach from both upper side portions. Here, the size that the hand can enter is the size that has enough space around even if the hand is inserted into the notch, and the distance that the hand cannot reach is that the hand cannot reach even if the hand is inadvertently inserted into the notch There is no distance.

  In the chair that can be converted to the bed, the side surface of the carriage provided in the lower part of the seat seat is provided with a resin rail having a lower sliding surface, and the chair body frame is provided with a resin rail storage part, A wedge-shaped bracket having a front surface as an inclined surface and a rear surface as a vertical surface is provided at the front end of the storage portion, and the wedge-shaped bracket can lock the resin rail on the rear surface after the resin rail is stored. The resin rail is also slidable at the top of the wedge-shaped bracket when being pulled out or pushed backward. The resin rail used here is a rail made of a synthetic resin having a low friction coefficient and excellent wear resistance at least on its sliding surface, and is slidable on the top of the wedge-shaped bracket. . Therefore, the entire rail is made of a synthetic resin with excellent wear characteristics, or a support material such as a metal is combined with this resin so that the lower surface, which is a sliding surface, becomes a resin surface. Also good.

  Further, in the above-mentioned chair, the chair body is provided with a directional caster, the carriage is provided with a caster fixed in the pull-out direction, and the caster provided on the carriage after the carriage is stored in the chair body frame is a floor. It is preferable to be in a more floating state. The drawer resin rail provided on the side surface of the carriage is provided to be inclined downward toward the front, and the storage section of the resin rail provided on the chair body frame accommodates the resin rail and holds the carriage on the floor. It is also preferable to be provided horizontally at a position where it can float more. In this case, the seat sheet is tilted downward toward the backrest after being stored in the chair body frame, and has a preferable shape as an easy chair, and is supported by the cart after being pulled forward, and becomes a preferable shape as a bed.

  Further, in the above chair, a rail-like stopper is provided below the resin rail provided on the side surface of the carriage, and the stopper restricts the height of the seat surface when the seat surface is pulled forward, and It is preferable to increase the safety of the conversion work.

  In the chair that can be converted into the bed of the present invention, the overhanging portion of the carriage is provided with cutout portions on both sides thereof, so that the support portion of the carriage and the end portion of the backrest seat at the time of conversion to the bed. There is a space for the hand to be in between, and even if the hand is accidentally inserted, it can be safely switched without being caught. And since the support part is provided in the center part of the overhang | projection part, the edge part of a backrest sheet | seat can be supported by the support part which a hand does not enter at the time of bed change, and a backrest sheet | seat can be kept horizontal.

  Also, by using a combination of a resin rail and a wedge-shaped bracket provided at the tip of the storage portion of this rail, the work of drawing out the seat surface sheet and converting it to a bed, or pushing the seat surface sheet back into the chair Can be quick, easy and safe alone. That is, when pulling out the seating sheet, the seating sheet is lifted together with the carriage, the resin rail locked to the storage portion is lifted by the wedge-shaped bracket, the sliding surface is placed on the top of the wedge-shaped bracket, and the wedge-shaped bracket By sliding at the top and making full use of the characteristics of the resin rail with excellent slidability, the seat can be pulled out smoothly with a small force and converted into a bed. On the other hand, when the seat sheet is pushed in to fold the backrest sheet in order to change from the bed to the chair, the rear end of the sliding surface of the resin rail extends to the top of the wedge-shaped bracket along the entire slope of the wedge-shaped bracket. Then, the sliding surface of the resin rail slides smoothly on the top of the wedge-shaped bracket, and the resin rail fits in the storage portion, is locked on the rear surface of the wedge-shaped bracket, and can be easily converted into a chair. This conversion work can be done quickly and easily by one person with a simple structure that combines a resin rail with excellent slidability and a wedge-shaped bracket, and the presence of a notch provided in the support part of the carriage allows the seating surface Even when the sheet is pulled out, it can be safely performed without pinching the hand.

It is a perspective view of the chair which can be converted into the bed of this invention. It is the perspective view of the chair which can be converted into the bed of this invention converted into the bed. It is a side view of the frame of the state converted into the bed. It is an isometric view explanatory drawing of the trolley body in the chair of the present invention. It is an isometric view explanatory drawing of the trolley body in the conventional chair. It is side explanatory drawing of each step which changes from a chair to a bed. It is explanatory drawing of the accommodating part of a resin rail, a wedge-shaped metal fitting, and a stopper.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a chair that can be converted into a bed. The side surfaces 50 are provided on the left and right sides, and armrests 51 are provided on the upper portions thereof. Between the left and right side surfaces 50, a seat surface sheet 10, a backrest sheet 20, and a back sheet 30 are provided, and these sheets are respectively connected to the support body with hinges and can be rotated around the hinges. It has become. Therefore, the seat surface sheet 10 can be converted into the bed shown in FIG. 2 by pulling forward together with the carriage 40 provided in the lower part thereof. This bed is usually used with the seat sheet 10 on the foot side and the back sheet 30 on the head side, and a pillow 70 is arranged in FIG. The belt 60 attached to the backrest seat 20 is used to grasp and pull up when changing from a bed state to a chair state.

  In the above conversion, in the chair state shown in FIG. 1, the backrest seat 20 is in a standing state, but in the bed shown in FIG. 2, the backrest seat 20 is leveled and connected to the seat surface seat 10. The end portion to be supported is supported by the upper surface of the projecting portion 41 of the carriage 40 toward the backrest seat 20 side. In the present invention, notches 42 are provided on both upper sides of the overhanging portion 41 of the carriage 40 so as not to be caught even if the hand is accidentally inserted during the conversion to the bed. Even when the hand is inserted, the notch 42 may have a space around the hand, and preferably has a height of about 3 cm or more and a width of about 8 cm or more.

  FIG. 3 shows the chair body, the carriage, and the frame of each seat support in a state converted to the bed shown in FIG. The seat surface sheet 10, the back seat 20 and the back seat 30 shown in FIG. 3 are attached to the seat surface support 11, the back seat support 21 and the back seat support 31, respectively. Are connected by hinges 12, 23 and 35, and are rotatable around the hinge. On the other hand, the carriage 40 is joined to the lower part of the seating surface support 11 and constitutes an overhanging portion 41 at a portion that protrudes from the seating surface support 11. The upper surface of the overhanging portion 41 plays a role of supporting the end portion 21a of the backrest sheet support 21, but in the carriage 40 of the present invention, the notch portions 42 are provided on both upper side portions, and the supporting portion 43 provided on the upper inside. The end 21a is supported by. FIG. 4 is an explanatory perspective view of the main body of the carriage 40 of the present invention. Since the support portion 43 is provided in a distance that the hand cannot reach from the side surface of the carriage 40, the support portion 43 is not pinched even if the hand is inadvertently inserted into the notch portions 42 provided on both side surfaces. The distance that the hand cannot reach is preferably about 8 cm or more.

  FIG. 5 shows a main body of a chair carriage 40 'that can be converted into a conventional bed. This main body has a rectangular parallelepiped shape and supports the end portion 21a of the backrest sheet support 21 on the upper surface 41a of the overhanging portion 41. Therefore, between the upper surface 41a and the end portion 21a, There was a possibility of accidentally putting a hand and getting caught. On the other hand, in the trolley | bogie 40 of this invention, since the notch part 42 is provided as shown in FIG. 4, a hand is not pinched. As shown in FIG. 3, since the end portion 21a is supported by the support portion 43 provided at a position where the hand cannot reach, the backrest seat can be kept horizontal without being pinched by the hand.

  Although the support part 43 shown in FIGS. 3 and 4 is made of a round pipe-like material, it only needs to be able to support the end part 21a of the backrest sheet support 21 and is disposed inside, so that its shape is particularly The material is not limited, and the material may be a square steel pipe, an angle steel material, or the like, similar to the frame material constituting the carriage.

  A mechanism for switching from the chair shown in FIG. 1 to the bed shown in FIG. 2 will be described with reference to the side view of FIG. FIG. 6 is an explanatory side view showing that the state 1 becomes the bed state 5 through the state 2 to 4 from the state 1 of the chair. As described above, the seat support 11 that supports the seat 10 and the back support 21 that supports the back seat 20 are connected by the hinge 12, and the back seat support that supports the back support 21 and the back seat 30. The body 31 is connected by a hinge 23, and the back seat support 31 and the chair body frame 53 are connected by a hinge 35, which are rotatable around the hinges connecting each other. Therefore, as shown in the state 1, the seats 10, 20, and 30 are folded to form a chair, and then the seat sheet 10 is pulled forward to pass through the states 2 to 4. Thus, each of the sheets 10, 20, and 30 can be connected in a planar shape to form a bed. FIG. 3 shows a chair body, a carriage, a frame of each seat support, and a hinge in a state converted to a bed.

  As shown also in each figure, the resin rail 44 comprised by the resin part 44a and the support part 44b is provided in the side surface of the trolley | bogie 40 provided in the lower part of the seat sheet 10. The chair body frame 53 is provided with a storage portion 54 for the resin rail 44 horizontally, and a wedge-shaped metal fitting 55 is provided at the tip of the storage portion 54. The wedge-shaped metal fitting 55 has an inclined front surface and a vertical rear surface. In the chair state 1, the resin rail 44 is stored in the storage portion 54, and the front end of the resin rail 44 is locked by the vertical surface of the rear surface of the wedge-shaped metal fitting 55. The storage portion 54 is adjusted to a height at which the direction fixing caster 45 provided on the carriage 40 can float above the floor surface FL. Therefore, in the state 1 of the chair, the chair body is supported by the directional caster 52 and can freely move. Enlarged views A to C are explanatory views in which the combined portion of the wedge-shaped metal fitting 55 and the resin rail 44 is enlarged. As shown in the enlarged view A, the resin rail 44 includes a resin portion 44a and a support body 44b. It is stored in the storage portion 54 with the resin portion 44 a that bears the sliding surface down, and is locked on the rear surface of the wedge-shaped metal fitting 55.

  As shown in FIG. 7, the storage portion 54 and the wedge-shaped metal fitting 55 are attached to the chair body frame 53 so that the upper surface of the storage portion is horizontal, and the resin rail 44 is stored on the upper surface of the storage portion. Is done. A wedge-shaped metal fitting 55 is attached to the tip of the storage portion 54. In FIG. 7, a metal plate is processed into a wedge shape and combined with the metal fitting base material 57 to form a wedge-shaped metal fitting 55. The front surface of the wedge-shaped metal fitting 55 is a slope, and the rear surface is a vertical surface and is integrated with the storage portion 54. The seat surface sheet 10 can be pulled out or pushed in by sliding the resin portion 44a of the resin rail 44 at the apex 56 that changes from the inclined surface to the vertical surface.

  In order to pull out the seat sheet 10 from the state 1 in FIG. 6, the front part is lifted, the tip of the resin rail 44 is lifted from the storage part 54, the resin rail 44 is unlocked by the rear surface of the wedge-shaped bracket 55, As shown in the enlarged view B of state 2, the resin portion 44a is placed on the top portion 56 of the wedge-shaped metal fitting 55, and the seat sheet 10 is pulled forward together with the carriage 40 while sliding the resin portion 44a on the top portion 56. . In the state 3 where the vehicle is pulled out to some extent, the caster in front of the casters 45 provided on the carriage 40 is in contact with the floor surface FL. In the pulled-out state 4, the rear end 48 of the resin portion 44 a slides down the slope of the wedge-shaped bracket 55 as shown in the enlarged view C, and the seat surface sheet 10 is supported by the casters 45 of the carriage 40. Furthermore, the seat surface sheet 10 is pulled forward together with the carriage 40 to reach the bed state 5. As shown in the enlarged view C, the rear end 48 has a shape cut off obliquely, so that the slope can be smoothly slid down. Furthermore, as will be described later, when the slope of the wedge-shaped metal fitting 55 is slid up to be in the state 1 of the chair, it can be smoothly slid.

  In the state 5 of the bed, as shown in FIG. 3, the hinges 12 and 23 are completely opened, the hinge 35 is closed, and the sheets 10, 20, and 30 are connected in a flat shape. Yes. In this state 5, the end portion 21a of the backrest seat support 21 is supported by the support portion 43, and the backrest seat 20 is horizontal. In the process from the state 4 to the state 5, the end 21a may be grasped with the hand. In that case, there is a possibility that the hand is pinched when the conventional cart is in the state 5, but in the cart of the present invention, since the notch portion 42 is provided, pinching is avoided.

  And in said state 5, the seat surface sheet | seat 10 is horizontal and becomes a bed surface which is comfortable to sleep. On the other hand, the resin rail 44 is inclined to the front and provided on the side surface of the carriage 40. In the state 1 of the chair, the resin rail 44 is stored in the storage portion 54 provided horizontally, Therefore, the seat surface sheet 10 is inclined downward toward the backrest sheet 20, so that a comfortable seat is obtained.

  In contrast to the above, in order to switch from a bed to a chair, the state can be changed from state 5 to state 1 through states 4 and 2 in FIG. First, in the state 5, the seat sheet 10 is pushed backward. At this time, when the belt 60 is attached as shown in FIG. 2, the belt 60 is gripped and the backrest sheet 20 is slightly pulled up. However, the seat sheet 10 is pushed backward together with the carriage 40. In state 4, the rear end 48 of the resin portion 44 a of the resin rail 44 hits the slope of the wedge-shaped metal fitting 55, and further slides up the slope by pressing, and in states 3 to 2, the resin portion 44 a is wedge-shaped metal fitting 55. When the tip of the resin portion 44 a gets over the top portion 56, the resin portion 44 is stored in the storage portion 54 and becomes the state 1, and the resin rail 44 is locked on the rear surface of the wedge-shaped metal fitting 55.

  The carriage 40 is provided with a rail-like stopper 46 below the resin rail 44. The stopper 46 restricts the height of the seat 10 to be lifted. When the carriage 40 is lifted as shown in FIG. 7, the height of the lifting is restricted by the wedge-shaped metal fitting 55 hitting the stopper. Yes. In this example, the stopper 46 includes a resin portion 46 a and a support 46 b, and has a structure in which the resin rail 44 is inverted up and down, and is provided in front of the carriage 40 in parallel with the resin rail 44. Yes. This is because the seat surface sheet 10 is pulled up at the beginning of the pulling out of the seat, but the pulling out may be performed in the pulled up state. Therefore, with such a structure, the drawing operation can be performed smoothly. Because. Here, the stopper 46 is provided in the first half of the side surface of the carriage, but this is because the pulling is performed at the beginning of the drawer, and it can be provided on the entire side face of the carriage 10. Furthermore, since it only needs to function as a stopper, it is not always necessary to use a combination of the resin portion 46a and the support 46b as shown in the figure.

  In the form shown in each figure, the resin rail 44 is composed of the resin portion 44a and the support body 44b. However, the resin rail 44 is a composite having at least a sliding portion on the lower surface with a small friction coefficient and excellent wear resistance. Any resin may be used, and the present invention is not limited to such a configuration. Accordingly, a plate made of such a synthetic resin may be bonded to a support such as a square steel pipe, or the entire resin rail may be made of such a synthetic resin. Furthermore, the surface of the square steel pipe may be coated with such a synthetic resin to form a sliding surface.

  Synthetic resins having a small coefficient of friction and excellent wear resistance used in the resin part of the resin rail of the present invention include polyamides such as polyacetal (polyoxymethylene), nylon 66, nylon 12, nylon 46, and polytetrafluoroethylene. Fluorine resin such as polypropylene, ultra high molecular weight polyethylene having a molecular weight exceeding 1 million, etc. are preferably used. In particular, polyacetal is preferable from the viewpoints of processing characteristics and sliding characteristics. In order to further improve the sliding characteristics, a lubricating oil may be blended or a fluororesin may be filled, and either a copolymer or a homopolymer may be used. These types of polyacetals can also be used. These synthetic resins may be molded into a prismatic shape to form a resin rail, or formed into a plate-shaped body and bonded to a support such as a square steel pipe, or coated on the support surface to form a resin rail.

  As described above, the wedge-shaped metal fitting may be a metal plate such as a steel plate processed into a wedge shape, or a metal material cast into a wedge shape. Furthermore, it is also possible to use not a metal material but also a synthetic resin that is excellent in wear resistance as described above and molded into a wedge shape.

  Further, in the chair of the present invention, the cart 40 is provided with a direction fixing caster 45 so that the seat surface sheet 10 can be pulled out and pushed in more easily. The chair main body is provided with a directional caster 52 so that the chair main body can be easily moved. The directional universal caster 52 is preferably provided with a stopper. And after moving, you can use the stopper to fix it in the place after moving, or you can use the stopper during the above-mentioned bed and chair conversion work so that you can work safely, and even when you switch to bed It is preferred that it can work as well.

  Thus, in the chair of this invention, since the notch part 42 is provided in the upper both sides of the overhang | projection part 41 of the trolley | bogie 40, it can work safely without pinching a hand at the time of a mutual change of a chair and a bed Further, by adopting a simple structure combining the resin rail 44 and the wedge-shaped metal fitting 55 having excellent slidability, the seat surface sheet 10 can be easily fixed and released, so that the chair and the bed Mutual conversion with can be done quickly, safely and easily by one person.

  The chair that can be converted into the bed of the present invention is safe, can be converted into a comfortable easy chair and a comfortable bed by one person quickly and easily, and can be placed in a small space, In addition, because it can be easily moved, it can be used suitably for an attendant in a hospital room where the indoor space is limited, an emergency in a waiting room in a hospital, a guest in a hospital, etc. It can also be used as a rest room in general households, factories and offices.

DESCRIPTION OF SYMBOLS 10 Seat surface sheet 11 Seat surface sheet support body 20 Backrest sheet 21 Backrest sheet support body 21a End part 30 Back sheet 31 Back sheet support body 12, 23, 35 Hinge 40 Cart 40 'Dolly (conventional type)
41 Overhanging part 42 Notch part 43 Support part 44 Resin rail 44a Resin part (resin rail)
44b Support (resin rail)
45 direction fixed caster 46 Stopper 46a Resin part (stopper)
46b Support (stopper)
48 Resin portion (resin rail) rear end 50 Side surface 51 Armrest 52 Directional caster 53 Chair body mount 54 Storage portion 55 Wedge-shaped bracket 56 Top portion 57 Base material 60 Belt 70 Pillow

Claims (2)

  Seat seat, back seat, back seat, and chair body frame are connected sequentially with hinges, a carriage is provided under the seat seat, and it can be converted into a bed by pulling the seat seat forward The trolley has an overhanging portion on the backrest seat side, and is provided with a cutout portion having a size that allows the hand to enter on both upper sides of the overhanging portion. A chair that can be converted into a bed, characterized in that a support portion is provided inside.   The chair convertible into a bed according to claim 1, wherein a resin rail having a lower sliding surface is provided on a side surface of a carriage provided at a lower portion of the seat surface seat, and a resin rail storage portion is provided on the chair body frame. And a wedge-shaped bracket having a front surface as an inclined surface and a rear surface as a vertical surface, and the wedge-shaped bracket can lock the resin rail on the rear surface after the resin rail is stored. A chair that can be converted into a bed, in which a resin rail is slidable at the top when the face sheet is pulled forward or pushed backward.

Images