JP2005137639A - Uprising assisting chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a structure by adopting a structure which never applies a concentrated load on a part of a link mechanism and to improve durability in an uprising assisting chair for assisting a user in standing up or being seated by displacing a seat part by the link mechanism. <P>SOLUTION: In the uprising assisting chair 11 which displaces the seat part 13 by a base 14 for supporting the seat part 13 at a prescribed height and an expanding and contracting means 33 mounted on the base 14, the seat part 13 comprises both a front seat part 13a and a rear seat part 13b which are connected in the cross direction through a hinge part 17. A four-bar linkage mechanism is constituted by pivotally attaching the front end part of the front seat part 13a to the front side part of the upper end of the base 14 and by connecting the base part 14 and the back end part of the rear seat part 13b by a supporting rod 30. The front end part 32a of the expanding and contracting means 33 is connected to the back side part of the front seat part 13a, and the front seat part 13a rotates around the front end part in the uprising assisting chair 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a standing support chair suitable for use by, for example, elderly people with weak legs and the sick.

  The stand-up assistance chair as described above is intended to make it easier for the user to sit and stand up by compensating for the lack of muscle strength when the user sits and stands up. For this reason, the seat is caused to reciprocate between the direction in which the human body sits and the direction in which the human body sits. However, in order to perform a more natural seating / standing operation, the seat is separated into two front and rear members ( There is one in which a parallel link is formed between a chair main body and a chair main body that supports the seat portion (see Patent Document 1).

  In the standing-up auxiliary chair described in Patent Document 1, the front seat portion and the rear seat portion are connected by a hinge, the lower front end of the rear seat portion and the chair main body are connected by a front link, and the rear seat portion A parallel link is configured by connecting the lower rear end and the chair body with a rear link. And the front-end | tip of the gas spring for the operation | movement which displaces a seat part is connected to the front-back direction intermediate | middle of the said rear seat part.

  Further, the front seat portion is not configured to form the parallel link, but is flexibly connected from the front end of the rear seat portion by the hinge so as to hang down by its own weight.

  However, if the force point, which is the point at which force is applied to displace the seat part, is present in the rear seat part, in the displacement operation, the rear seat part and the front link are between the force point and the fulcrum. Therefore, a large load is applied to the pivot portion. In addition, since the pivotal portion must support the weight of the user, the applied load is very large. For this reason, it is necessary to provide the pivotal support portion connecting the rear seat portion and the front link with sufficient strength to withstand the load.

  Furthermore, the front seat is configured to hang down from the front end of the rear seat connected via a hinge under its own weight, so that when the user stands up, there is a load in the direction in which the front seat is shifted downward due to contact with the user's thigh that stands up. Easy to hang. That is, a load is applied to the hinge. Also, when sitting, the user's thighs come into contact with the front seat part that hangs down under its own weight, and a force that lifts the front seat part with displacement is created, so the front seat part and the rear seat part are connected. There is a problem that the load applied to the hinge is large.

JP-A-10-179644

  Therefore, the main object of the present invention is to adopt a structure in which an extra load is not applied to a specific part to simplify the configuration and improve durability.

  Means for that purpose are a base that supports the seat at a predetermined height, and a stand-up auxiliary chair that displaces the seat by means of expansion and contraction means attached to the base, and the seat is connected via a hinge. A front seat portion and a rear seat portion connected in the front-rear direction, and a front end portion of the front seat portion is pivotally attached to an upper front side portion of the base, and the base and the rear seat portion A four-bar linkage mechanism is configured by connecting the rear end portion with a support rod, and the front end portion of the telescopic mechanism is connected to the rear side portion of the front seat portion, and the front seat portion is centered on the front end portion. It is a stand-up auxiliary chair that can be instigated.

  That is, since the front end portion of the expansion / contraction mechanism is connected to the rear side portion of the front seat portion, by driving the expansion / contraction means, the rear side portion of the front seat portion constituting the four-bar linkage mechanism becomes a power point, The front seat is instigated. If the extension means is extended when the user stands, the front seat and the rear seat can be bent from the front and back on the base by the hinge connecting the front seat and the rear seat. In accordance with this movement, the rear seat part moves upward while being supported by the support rod. Further, when the user is seated, if the telescopic means is contracted, the front seat part tilts backward, and the rear seat part descends while moving backward while being supported by the support rod according to this movement.

  In this way, the force applied by the expansion / contraction means is directly transmitted to the front seat portion, and the desired displacement of the seat portion is made.

  In addition, it is good to form an armrest part in the said back seat part. Since the rear seat portion can be displaced while maintaining substantially horizontal, the armrest portion that is displaced together with the rear seat portion is convenient for the user to support the body with the arm.

  The expansion / contraction means may be constituted by an electric expansion / contraction mechanism having an electric motor and an expansion / contraction rod that expands / contracts by driving of the electric motor, and an operation switch of the electric expansion / contraction mechanism may be provided at the tip of the armrest portion. Since it is electric, it can exert a sufficient force, and since the switch is provided on the armrest, the operation can be easily performed while supporting the weight with the arm.

  At the rear end of the rear seat portion, a backrest-like buttocks regulating portion that regulates the rear end position of the user's buttocks may be provided. If there is no backrest on the back seat, there will be nothing to support the user's body trying to sit or stand, but the buttocks control section regulates the position of the user's buttocks and Since it plays the role of drowning, it is possible to prevent a situation where the user falls back.

  If a rotation support means for rotatably supporting the base is provided at the lower part of the base, the chair can be erected and seated in the desired direction along with the base.

  The safety of the user can be ensured by providing a foot restricting portion that abuts the user's calf portion and restricts the position of the user's foot on the front surface of the base. That is, when standing up, the front seat part pushes the user's thigh forward, but at this time, if the foot restricting part positions the user's foot in front of the base, the front seat part Prevents the user from being pushed out before the standing position.

  As described above, according to the present invention, the four-bar linkage mechanism is configured by using the front seat portion and the rear seat portion that constitute the seat portion, and the support rod that supports the rear seat portion that rises upward. It can be simply configured without requiring a separate link other than the support rod. In addition, since the tip of the expansion / contraction means is connected to the rear side portion of the front seat portion having the fulcrum, the force applied from the expansion / contraction means acts directly on the front seat portion without going through the pivotally supported portion. There is no extra load on the area. For this reason, durability can be improved while simplifying the configuration.

  When the armrest portion is formed on the rear seat portion as in the invention according to claim 2, the armrest portion is displaced together with the rear seat portion in the same positional relationship as when the armrest is put on the seat. It is easy to support to support. For this reason, the effect that assistance of standing and seating can be performed more safely can be achieved.

  If the expansion / contraction means is constituted by an electric expansion / contraction mechanism as in the invention according to claim 3, a sufficient force can be exerted, and the displacement state of the seat portion can be freely operated depending on the control of the motor. Further, when the operation switch of the electric telescopic mechanism is provided at the distal end portion of the armrest portion, the operation can be easily performed while supporting the weight with the arm, so that the safety of the user can be ensured and the convenience thereof can be achieved.

  As in the invention according to claim 4, when a backrest-like buttocks regulating portion that regulates the rear end position of the user's buttocks is provided at the rear end of the rear seat, the backseat can be provided without any backrest. Can support the user's body when sitting and standing. When the back seat is provided with a backrest, the amount of deformation when the seat is displaced is large, and there is a sense of pressure and the balance of the standing chair is easily lost. The effect of ensuring safety can be achieved.

  If the rotation support means is provided at the lower part of the base as in the invention according to claim 5, the chair can be stood and seated in the desired direction along with the base of the chair. For this reason, even if the standing auxiliary chair is heavy, there is an advantage that it is easy to use.

  As in the invention according to claim 6, when a foot restricting portion for restricting the position of the user's foot is provided on the front surface of the base, the user is prevented from falling forward unexpectedly, and the safety of the user is improved. The effect that it can secure is acquired.

An embodiment for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is an explanatory view of the structure showing the operating state of the standing assistance chair 11. As shown in this figure, the standing assistance chair 11 assists the user 12 in supporting the body when sitting and standing, and includes a seat portion 13 which is a portion on which the user 12 sits, and the seat. It has the base 14 which supports the part 13 to predetermined height, and the expansion-contraction means attached to this base 14.

  FIG. 2 is a side view showing the basic structure of the standing auxiliary chair 11, and FIG. 3 is a plan view thereof. As shown in these drawings, the seat portion 13 includes a front seat portion 13a and a rear seat portion 13b. It is divided into two parts at the front and rear.

  In other words, a metal pipe front seat frame 15 and a rear seat frame 16 having a predetermined width capable of supporting the user 12 are provided, and both left and right ends thereof are connected via a hinge portion 17 so as to be bent. Has been.

  The length of the front seat part frame 15 in the front-rear direction is formed shorter than the length of the rear seat part frame 16 in the front-rear direction, and a size corresponding to the size of each frame body 15, 16 is provided on each frame body 15, 16. Thus, mat members 18 and 19 having appropriate thicknesses are fixed. In other words, the front seat portion 13 a is formed by the front seat portion frame body 15 and the mat member 18, and the rear seat portion 13 b is formed by the rear seat portion frame body 16 and the mat member 19.

An armrest device 20 is fixed to the rear seat frame 16.
The armrest device 20 includes a support member 21 made of a substantially U-shaped metal pipe in a side view, and a receiving member 22 fixed to the upper upper horizontal bar portion 21 a of the support member 21. Fixing to the rear seat frame 16 is performed by fixing the lower lower horizontal bar portion 21b of the support member 21 from the left and right sides by appropriate means such as welding, rivets, and bolts.

  Further, a buttock regulating member 23 for regulating the rear end position of the buttock of the user 12 is provided at the rear end of the rear seat frame 16. The flange restricting member 23 is formed of a horizontal U-shaped metal pipe material, and the height of the flange restricting member 23 protrudes slightly higher than the mat members 18 and 19 in a fixed state. The flange part regulating member 23 is also fixed at its lower ends by appropriate means such as welding, rivets, bolts and the like.

  The seat 13 configured as described above is fixed on the base 14. The base 14 is formed using a metal pipe material in a rectangular parallelepiped frame shape. And, on the front end portion of the upper end of the base 14, pivot attachments 24 are projected in two places on the left and right sides, and a fulcrum suspended from the distal end portion of the front seat frame 15 with respect to the pivot attachments 24. A pivot attachment is rotatably connected to form a pivot portion 26. Thereby, the front seat part frame 15 of the seat part 13 is in a state in which it can be driven to rotate forward with the rear side raised from the horizontal posture with the pivot part 26 as the center.

  Further, a crosspiece member 27 is stretched in the horizontal direction on the intermediate portion in the vertical direction of the front surface of the base 14, and a pair of left and right pivot fixing tools 28 are fixed to the crosspiece member.

  A pivot fixture 29 similar to the pivot fixture 28 is attached to the lower surface of the rear end portion of the rear seat frame member 16 with the same width so as to support the base 14 and the rear seat frame 16. 30.

  When the front seat frame 15 and the rear seat frame 16 are arranged side by side, the support rod 30 is stretched between the pivot fixing fixtures 28 and 29 facing each other between the seat 13 and the base 14. It is.

  The end of the support rod 30 on the base 14 side may be provided at a portion other than the above in the base 14.

  The expansion / contraction means is a known electric expansion / contraction mechanism 33 having an electric motor 31 and an expansion / contraction rod 32 that expands / contracts when driven by the electric motor 31, and the expansion / contraction rod 32 is accommodated in the base 14.

  A base end portion of the electric telescopic mechanism 33 is rotatably fixed to a middle position in the left-right direction at a lower end rear end position in the base 14, and a distal end portion 32 a of the telescopic rod 32 is a rear end portion of the front seat frame body 15. It is rotatably connected to the intermediate position in the left-right direction on the lower surface via a connection fitting 32a.

  As described above, the front seat frame 15, the rear seat frame 16, the support rod 30, and the base 14 constitute a four-bar linkage mechanism, and the front seat frame 15 includes the electric telescopic mechanism 33. Since the distal end portion 32a is connected, as shown in FIG. 4, the front seat frame 15 is fanned forward by extending the telescopic rod 32, and the rear seat frame 16 is moved upward while the rear seat frame 16 is moved upward. A moving displacement is possible.

  A rotation support device 34 that rotatably supports the base 14 is provided below the base 14. The rotation support device 34 has a known structure including a base frame 35 made of a metal pipe having a circular frame shape and a rotation mechanism portion 36 having a bearing and the like positioned on the base frame 35.

  As shown in FIG. 5, the base 14 provided with the rotation support device 34 is rotatable in the left-right direction with the center point of the rotation support device 34 as the rotation center a.

  Further, on the front surface of the base 14, a foot restricting portion 37 that is appropriately formed by combining an appropriate cushion material and a core material is provided. The foot restricting portion 37 is formed to be inclined so as to protrude forward as it goes down. As shown in FIG. 1, the amount of protrusion is determined by the front seat portion 13 a having a displaced front foot portion 13 a by causing the front surface to abut the calf portion of the user 12 who uses the standing support chair 11. It is set so that it can be restricted to a position where it is not pushed forward unnecessarily. Specifically, the lower portion of the foot restricting portion 37 may be protruded to the same position as the tip position of the front seat portion 13a that is displaced and tilted forward.

  The entire circumference of the base 14 is appropriately decorated and covered together with the foot restricting portion 37.

  The operation switch 38 for driving the electric telescopic mechanism 33 is provided at the tip of the receiving member 22 of the armrest device 20 as shown in FIG. In the figure, 38a is a main power source, 38b is a switch that is used when standing and extends the telescopic rod 32, and 38c is a switch that is used when sitting and contracts the telescopic rod 32.

  Such an operation switch may be a remote control type as shown in FIG. 7 and may be configured to be detachably attached to the receiving member 22 of the armrest device 20. When the remote control type operation switch 38 is provided, the direction of the operation switch 38 can be changed. Therefore, when the user is a person requiring assistance, there is an advantage that even the assistant can easily operate.

  Further, since the mat member 18 of the front seat portion 13a and the mat member 19 of the rear seat portion 13b are opened before sitting and are closed according to the seating, there is a possibility that the clothes of the user 12 may be pinched. As shown in FIG. 8, the space between the mat member 18 of the front seat portion and the mat member 19 of the rear seat portion occupies the space when both are open, so that they do not get in the way when both are closed. The pinching prevention means 39 may be provided. The pinching prevention means 39 is made of a flexible sheet-like body, such as a rubberized cloth, and is hung in an arch shape between the facing portions of the front seat mat member 18 and the rear seat mat member 19. It is good to pass.

  When such a pinching prevention means 39 is provided, the pinching prevention means 39 is stretched in an arch shape as shown in FIG. 8A before seating, and the mat member 18 and the rear seat part 13b of the front seat part 13a. The mat member 19 is occupied to prevent intrusion. Further, when seated, as shown in FIG. 8 (b), the pinching prevention means 39 is sandwiched between the mat member 18 of the front seat portion 13a and the mat member 19 of the rear seat portion 13b and becomes thin. It does not hinder 13a and the rear seat part 13b from taking a substantially horizontal posture.

  In the figure, reference numeral 40 denotes a backrest portion attached to the rear end portion of the base 14 so as to rise upward.

  In the standing auxiliary chair 11 configured as described above, when the electric extension mechanism 33 is driven by the operation switch 38 provided at the distal end portion of the armrest device 20 and the extension rod 32 is extended when standing up from the seated state. As shown in FIG. 4, the rear side portion of the front seat frame 15 constituting the front seat portion 13a constituting the four-bar linkage mechanism becomes a power point, and the front seat portion 13a is instigated. Then, the rear seat part 13b moves up and moves forward with the fan motion of the front seat part 13a. At this time, since the buttocks restricting member 23 is provided at the rear end of the rear seat portion 13b, the buttocks of the user 12 can be prevented from being positioned more than necessary, and the user 12 can be stably supported and used. The situation where the person 12 falls back can be prevented in advance. When the user 12 tries to stand up while putting his / her weight on the armrest device 20, the buttocks of the user 12 move away from the rear seat portion 13b. At this time, the front seat portion 13a, as shown in FIG. Twelve lower thighs are supported. For this reason, even the user 12 with weak leg strength can easily stand up.

  In addition, since a foot restricting portion 37 that restricts the position of the user's 12 foot by abutting the calf portion of the user 12 is provided on the front surface of the base 14, the user 12 holds his / her foot on the near side. Even if it approaches, it can be prevented and the position of the landing foot can be set before the predetermined position. For this reason, it can prevent that the displaced front seat part 13a pushes the user 12 ahead of a standing position, can prevent the user 12 falling down unexpectedly, and can ensure safety.

  Further, since the armrest device 20 is formed on the rear seat portion 13b that is displaced while being kept substantially horizontal, the armrest device 20 that is displaced together with the rear seat portion 13b is easy to support the user 12 to support the body with the arm, and is safe. Can increase the sex.

  On the contrary, when sitting from the standing state, the electric expansion / contraction mechanism 33 is driven by the operation switch 38 to contract the expansion / contraction rod 32. Then, the front seat part frame 15 of the front seat part 13a is pulled, and the rear seat part 13b is displaced backward while descending while being instigated backward. That is, if the lower part of the thigh of the user 12 is supported by the front seat part 13a before the switch operation, the front seat part 13a moves backward while supporting the user 12, and the front seat part 13a and the rear seat part 13b are moved. When lined up front and rear, the rear seat portion 13b and the buttocks regulating member 23 support the buttocks of the user 12, and the seating is completed. The user 12 holds the armrest device 20 that is displaced together with the displacement of the rear seat portion 13b, and applies the weight. For this reason, even the user 12 with weak leg strength can be seated without placing a burden on the leg.

  As described above, a four-bar linkage mechanism is configured by using the front seat frame 15 and the rear seat frame 16 constituting the seat 13 and the support rod 30 that supports the rear seat frame 16 rising upward. Therefore, it can be simply configured without requiring a separate link other than the pair of support rods 30. Further, since the front end portion 32a of the electric telescopic mechanism 33 is connected to the rear side portion of the front seat portion frame body 15 having the fulcrum, the force due to the expansion and contraction directly acts on the front seat portion frame body 15, so that the hinge or the like No extra load is applied to the connecting part. For this reason, it is possible to obtain the standing auxiliary chair 11 having a simple structure and high durability.

  Further, since the electric telescopic mechanism 33 is used, a desired operation can be performed regardless of the weight of the user 12. And since the operation switch 38 is provided in the front-end | tip part of the armrest apparatus 20, the operation can be performed easily, supporting a weight with an arm, and safety | security is improved.

  Further, since the base 14 is rotatably supported by the rotation support device 34, the base 14 can be erected and seated in the direction desired by the user. For this reason, even if the standing auxiliary chair 11 is heavy, it becomes easy to use.

In correspondence between the configuration of the present invention and the configuration of the above-described one form
The expansion / contraction means of the present invention corresponds to the electric expansion / contraction mechanism in the one aspect described above,
Similarly,
The front seat part corresponds to the front seat part 13a and the front seat part frame 15,
The rear seat corresponds to the rear seat 13b and the rear seat frame 16,
The armrest corresponds to the armrest device 20,
The rotation support portion corresponds to the rotation support device 34,
The present invention is not limited to the configuration of the above-described one form.

Structure explanatory drawing which shows the effect | action state of a standing assistance chair. The side view which shows the basic structure of a standing assistance chair. The top view which shows the basic structure of a standing assistance chair. Structure explanatory drawing which shows the state which displaced the seat part. The top view of an action state. The perspective view of an operation switch. The perspective view of the operation switch which concerns on another example. Sectional drawing of the seat part which concerns on another example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Standing auxiliary chair 12 ... User 13 ... Seat part 13a ... Front seat part 13b ... Rear seat part 14 ... Base 15 ... Front seat part frame body 16 ... Rear seat part frame body 17 ... Hinge part 20 ... Armrest device 23 ... Buttocks part Restricting member 26 ... Pivoting part 30 ... Supporting rod 31 ... Electric motor 32 ... Telescopic rod 32a ... Tip part 33 ... Electric telescopic mechanism 34 ... Rotation support device 37 ... Foot restricting part 38 ... Operation switch

Claims (6)

A base that supports the seat at a predetermined height, and a stand-up auxiliary chair that displaces the seat by means of expansion and contraction attached to the base,
The seat part is composed of a front seat part and a rear seat part connected in the front-rear direction via a hinge part,
While pivotally attaching the front end of the front seat to the upper front side of the base,
The base and the rear end of the rear seat are connected with a support rod to form a four-bar linkage mechanism,
A standing auxiliary chair in which a front end portion of the telescopic mechanism is connected to a rear side portion of the front seat portion, and the front seat portion can be instigated around the front end portion. The standing assistance chair according to claim 1, wherein an armrest portion is formed on the rear seat portion. The expansion / contraction means is an electric expansion / contraction mechanism having an electric motor and an expansion / contraction rod that expands and contracts by driving the electric motor,
The standing auxiliary chair according to claim 2, wherein an operation switch of the electric telescopic mechanism is provided at a distal end portion of the armrest portion. The standing auxiliary chair according to claim 1, 2, or 3, wherein a backrest-shaped buttocks regulating portion that regulates a rear end position of a user's buttocks is provided at a rear end of the rear seat portion. The standing auxiliary chair according to any one of claims 1 to 4, wherein a rotation support means for rotatably supporting the base is provided at a lower portion of the base. The standing assistance according to any one of claims 1 to 5, wherein a foot restricting portion is provided on the front surface of the base so as to abut the user's calf portion and restrict the position of the user's foot. Chair.

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