JP6342672B2 - Chair - Google Patents

Description

  The present invention is used as, for example, a chair on which a patient sits in a medical facility or a learning chair for a child, and is supported by the support structure and the support structure so as to be rotatable about a vertical axis. The present invention relates to a chair provided with a seat body and a rotation stopping means for stopping the rotation of the seat body.

  As a chair provided with the rotation stop means for stopping rotation of a seat, there exists a chair indicated by patent documents 1, for example. Such a chair has the effect of preventing the seat from turning over when the seat is turned when the seated person stands up from the seated state or when a walking person puts his hand on his back.

  However, it is necessary to operate the operation member both when stopping the rotation of the seat body and when releasing the seat body, and it is troublesome to perform the operation each time, especially when standing up from the seated state. Furthermore, in many cases, the operation of stopping the rotation of the seat is not performed.

  However, a chair used by a patient in a medical facility is required to be able to rotate the seat in order to smoothly perform a medical examination such as a palpation by a doctor in the sitting state. When the body is in a pivotable state, the above-mentioned fall accident may occur, and a state where it is desirable to rotate and a state where it is not desirable to rotate are frequently switched.

  In such a chair, requesting the operation member to be operated each time forces the user to perform troublesome work.

Japanese Patent Laying-Open No. 2005-212248

  The present invention has been made in view of the above-described problems, and does not require operation of an operation member. At the same time as a person is seated, the seat body can be rotated, and when the seat body rises from the seated state, the seat body It is an object of the present invention to provide a chair in which the rotation is stopped and the seat body can be rotated and switched automatically.

According to the present invention, the above problem is solved as follows.
(1) In a chair including a support structure that supports the seat body so as to be pivotable about a pivot in the vertical direction, and a rotation stop means for stopping the rotation of the seat body, the seat body includes: While being supported so as to be movable in the vertical direction with respect to the support structure, the rotation stopping means is provided between the seat and the support structure, and the seat and the support structure are in the vertical direction. By engaging with each other in a state of being separated by a predetermined distance, the seat is removed from the support structure by expanding and contracting in the vertical direction with an engaging portion and an engaged portion that stop the rotation of the seat. The chair has an urging means for urging elastically in the direction of separation.
With such a configuration, when the person is not seated, the seat body and the support structure are separated by the biasing means, and in this separated state, the engaging portion and the engaged portion are separated from each other. The seats are engaged with each other and the rotation of the seat is stopped. On the other hand, the person is seated, and at the same time, the elastic urging of the urging means is suppressed by the weight of the person, and the engagement portion and the engaged portion are engaged. Is released, and the seat can automatically rotate.

(2) In the above item (1), either the seat body or the support structure includes an attachment hole, and the other includes a columnar portion that fits in the attachment hole so as to be rotatable, and is engaged in the rotation stopping means. One of the part and the engaged part is integrally formed with the mounting hole, and the other is integrally formed with the columnar part, and the direction of unevenness for engagement between the engaging part and the engaged part is The mounting hole and the columnar part are formed so as to intersect with each other, and the seat body and the support structure are engaged and disengaged by relatively moving in the vertical direction.
With such a configuration, since either the seat body or the support structure includes a mounting hole, and the other includes a columnar portion that fits rotatably in the mounting hole, the seating body has the columnar portion. Is pivotable with respect to the support structure, and the engaging portion and the engaged portion of the rotation stopping means move relative to each other in the vertical direction. Therefore, a desired engagement / disengagement design can be facilitated by appropriately determining the vertical thicknesses of the engaging portion and the engaged portion as necessary.
Moreover, since the direction of the unevenness | corrugation for engagement with an engaging part and a to-be-engaged part is formed so that the circumference of an attachment hole and a columnar part may cross | intersect, engagement is performed reliably.

(3) In the above item (2), the columnar portion provided in either the seat body or the support structure is provided with a flange portion having a diameter larger than the outer diameter of the columnar portion, The urging means is provided directly or indirectly between the flange portion and the top plate of the enlarged-diameter hole portion provided in the attachment hole so as to face the flange portion.
With such a configuration, the urging means in the rotation stopping means has a flange portion having a diameter larger than the outer diameter of the columnar portion and the top of the enlarged diameter hole portion provided in the attachment hole so as to face the flange portion. Since it is provided between the plates, the urging means can act reliably.

(4) In the above item (2) or (3), the seat has a support base and a seat supported by the support base, and the member having the engaging portion in the rotation stopping means is a columnar shape. It is arrange | positioned at the upper end of a part, and is exposed to the internal space of the said support base.
With this configuration, since the member having the engaging portion in the rotation stopping means is exposed in the internal space of the support base, the fingers and the like are placed between the members that are engaged and disengaged by relative movement in the vertical direction. The clothes are prevented from being pinched.

(5) In any one of the above items (1) to (4), the support structure has a vertical leg strut including a gas spring that can be expanded and contracted in the vertical direction by pressing the piston rod. The seat body is provided with a height operation means for adjusting the height of the seat body by pressing the piston rod.
With such a configuration, the height of the seat body can be adjusted, and engagement / disengagement between the engaging portion and the engaged portion in the rotation stopping means is provided on either the seat body or the support structure. Since it is performed outside the outer periphery of the formed columnar portion, both the height adjusting mechanism and the engagement / disengagement mechanism are separated from each other, and mutual interference can be prevented.

  The present invention does not require operation of the operating member, and at the same time the person is seated, the seat body can be rotated, and when the seat body stands up from the seated state, the seat body stops rotating, and the seat body rotates. Switching between possible and stopped states is performed automatically, eliminating the hassle of manipulating operating members, and when a seated person stands up from a seated state or when a walking person puts his hand on his back It is possible to reliably prevent the seat body from being overturned by rotating.

It is an upper perspective view which shows the support base in the chair of this invention with a part of support structure. FIG. 2 is an exploded upper perspective view of FIG. 1. Similarly, it is a decomposition | disassembly lower perspective view of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2. It is an AA line enlarged vertical sectional view in Drawing 1 when rotation of a seat is in a release state. Similarly, it is an enlarged vertical sectional view when the rotation of the seat body is in a stopped state.

  FIG. 1 is an upper perspective view showing a support base 1 in the chair of the present invention together with a part of a support structure 2. In FIG. 1, the lower left is the front of the support base 1, a seat 3 is integrally disposed on the support base 1 and supported by the support base 1, and a seat having both the support base 1 and the seat 3. A body 4 is constructed.

  The support structure 2 includes a gas spring 5 that can be expanded and contracted in the vertical direction by pressing a piston rod 5a and a leg column 7 in the vertical direction that includes a leg tube 6 in which the gas spring 5 is non-rotatably fitted. The seat body 4 is supported so as to be rotatable about the leg support 7 as a pivot.

  The height of the seat body 4 is adjusted by pressing the piston rod 5a with a lever 8 as a height operation means.

  A rotation stopping means 9 for stopping the rotation of the seat body 4 is provided between the seat body 4 and the support structure 2.

  2 is an exploded upper perspective view of FIG. 1, FIG. 3 is an exploded lower perspective view of FIG. 1, and FIG. 4 is an enlarged view of a main part of FIG. FIG. 5 is an enlarged vertical sectional view taken along line AA in FIG. 1 when the seat body 4 is in a rotatable state.

  As shown in FIG. 2, the support base 1 is rotatably supported by a support member 10 fixed to the upper end of the gas spring 5 via a lower bush 11, an upper bush 12, and an annular push plate 13. .

  The support base 1 has a box shape with an upper opening, and has a substantially rectangular shape that is long in the front-rear direction. An attachment cylinder portion 15 having an attachment hole 14 is provided at the center inside the support base 1.

  As shown in FIG. 5, the mounting hole 14 is reduced in diameter via a step portion 16 to form a reduced diameter hole portion 17, and the diameter is increased in the lower half portion to form an enlarged diameter hole portion 18. .

In addition, as shown in FIG. 2, inwardly engaged teeth 19 a are arranged at a predetermined interval on the inner periphery of the upper end of the mounting hole 14 to form an engaged portion 19.

  As shown in FIG. 4, the support member 10 includes a cylindrical base body (columnar portion) 20 and a support rod 21 that protrudes outward from a lower portion of the base body 20. Three screw holes 20 a are provided on the upper surface of the base body 20. The supporting rod 21 has a bottomed shallow cylindrical shape, and two concentric ring-shaped grooves 22a and 22b are formed between the bottom portion 21a and the cylindrical wall 21b and on the outer periphery of the lower portion of the base body 20. A plurality of bottomed hole portions 23 are arranged circumferentially in the bottom portion 21a between the two annular grooves 22a and 22b. The bottomed hole 23 is fitted with a lower half portion of a compression spring 24 as an urging means that elastically expands and contracts in the vertical direction.

  As shown in FIG. 5, the compression spring 24 is crowned from above by an annular lower bushing 11 in which the BB cross section in FIG. 4 has a downward U-shape.

  The lower bush 11 has inner and outer peripheral walls 11 a and 11 b forming a downward U-shape fitted into ring-shaped grooves 22 a and 22 b in the support rod 21 of the support member 10, and moves up and down according to the expansion and contraction of the compression spring 24. It is like that.

  As shown in FIGS. 2 and 3, an upper bush 12 is disposed above the lower bush 11, and the upper bush 12 is mounted in the mounting hole 14 of the support base 1. The upper bush 12 includes a receiving hook 26 facing outward at the lower portion of the cylindrical portion 25, and four locking protrusions 26 a that protrude upward are provided on the upper surface of the receiving hook 26.

  On the other hand, the top plate 18a of the enlarged diameter hole portion 18 of the support base 1 is provided with four locking holes 18b at positions corresponding to the locking protrusions 26a.

  Further, the annular push plate 13 disposed above the upper bush 12 has outer protrusions 27a arranged at predetermined intervals on the outer periphery to form an engaging portion 27.

  The annular push plate 13 is provided with three through holes 13a. The annular push plate 13, which is a member having the engaging portion 27, is exposed in the internal space of the support base 1.

  In order to support the support base 1 rotatably on the support member 10 fixed to the upper end of the gas spring 5, the following procedure is used.

  As shown in FIG. 5, first, the lower half of the compression spring 24 is fitted into all the bottomed holes 23 in the support rod 21 of the support member 10 fixed to the upper end of the gas spring 5. Next, the lower bush 11 is compressed by fitting the lower end portions of the inner peripheral wall 11a and the outer peripheral wall 11b of the lower bush 11 into the inner annular groove 22a and the outer annular groove 22b of the support rod 21, respectively. The spring 24 is crowned. Next, in a state where the locking projection 26 a in the receiving bush 26 of the upper bush 12 is locked to the locking hole 18 b of the top plate 18 a of the enlarged diameter hole portion 18 in the mounting hole 14 of the mounting cylinder portion 15 of the support base 1. The base 1 is supported on the support member 10 from above by fitting the base 20 of the support member 10 into the reduced diameter hole portion 17. Next, the step in the mounting hole 14 of the support base 1 is performed so that the engaging portion 27 provided on the outer periphery of the annular pressing plate 13 is engaged with the engaged portion 19 in the mounting hole 14. The support base 1 is supported by placing it on the portion 16 and inserting the set screw 28 from above through the through hole 13a of the annular pressing plate 13 and screwing it into the screw hole 20a on the upper surface of the base 20 of the support member 10. It is supported on the member 10.

Since the engaging portion 27 in the annular pressing plate 13 fixed to the support member 10 fixed to the upper end of the gas spring 5 is engaged with the engaged portion 19 in the mounting hole 14 of the supporting base 1, The seat 3 supported by 1 is fixed so that it cannot rotate with respect to the leg column 7 to which the support member 10 is fixed.

  On the other hand, when a person sits on the seat 3, as shown in FIG. 6, the compression spring 24 is compressed by the weight of the person, so that the support base 1 moves downward relative to the support member 10 to form an annular shape. Since the engagement between the engaging portion 27 of the pressing plate 13 and the engaged portion 17 in the mounting hole 14 of the support base 1 is released, the seat 3 can be rotated with respect to the leg column 7. That is, the urging means in which the seat body 4 including the support base 1 and the seat 3 and the support structure 2 having the leg strut 7 including the gas spring 5 having the support member 10 fixed to the upper end extend and contract in the vertical direction. As a result of the elastic biasing of the compression spring 24, the engaging portion 27 and the engaged portion 19 are engaged with each other in a state of being separated in the vertical direction, and the rotation of the seat body 4 is stopped. The seat 4 moves downward relative to the support structure 2 by the seating, the engagement is released, and the seat 4 can be rotated. The sliding surface in the rotatable state is an upper bush 12 that rotates integrally with the support base 1, and a contact surface between the lower bush 11 and the support member 10.

  Further, the rotation stopping means for stopping the rotation of the seat body 4 is provided between the seat body 4 having the support base 1 and the support structure 2 having the support member 10, the annular push plate 13 and the like.

  In the embodiment, the mounting hole 14 is provided on the seat body 4 side, and the columnar portion 20 that is rotatably fitted to the mounting hole 14 is provided on the support structure 2 side. An attachment hole may be provided on the support structure side.

  In the embodiment, the engaging portion 27 and the engaged portion 19 in the rotation stopping means 9 are engaged with the engaging portion 27 and the mounting hole 14 on the annular push plate 13 fixed integrally to the columnar portion 20. The joint portion 19 is provided, but conversely, the engaged portion may be integrally provided on the columnar portion 20 side, and the engaging portion may be integrally provided on the mounting hole 14 side.

  Here, “integrally” may be integrally formed or integrally formed.

  In the embodiment, the direction of unevenness for engaging the engaging portion 27 and the engaged portion 19 (the direction in which the outward projecting teeth 27a and the inward projecting teeth 19a project) is the radial direction of the columnar portion 20. However, the present invention is not limited to this, as long as it intersects the circumference of the columnar part 20 and the engaging part 27 and the engaged part 19 have an engaging function.

  Moreover, the engaging part 27 and the engaged part 19 should just be engaged / disengaged when the seat body 4 and the support structure 2 move relatively up and down.

The present invention can be usefully applied not only to a chair on which a patient is seated in a medical facility or the like, but also to an elderly chair or a learning chair for a child in a nursing home. In particular, learning chairs for children tend to be repeatedly seated and unattended, and in the case of children, it is less likely to perform a switching operation between the swingable and stationary states of the seat. A chair that is automatically switched between a state in which the seat body can be rotated and a stop state is useful, such as a chair.
Also, when there is a risk of pinching the lower part of the seat, such as a learning chair for children, appropriate safety measures such as attaching a hook-shaped member that opens upward to the leg support may be taken. it can.

DESCRIPTION OF SYMBOLS 1 Support base 2 Support structure 3 Seat 4 Seat 5 Gas spring 5a Piston rod 6 Leg pipe 7 Leg support 8 Lever 9 Rotation stop means 10 Support member 11 Lower bush 11a Inner peripheral wall 11b Outer peripheral wall 12 Upper bush 13 Annular push plate 13a Through-hole 14 Mounting hole 15 Mounting cylinder part 16 Step part 17 Reduced diameter hole part (Mounting hole)
18 Expanded hole (mounting hole)
18a Top plate 18b Locking hole 19 Engaged portion 19a Inward projecting tooth 20 Base (columnar portion)
20a Screw hole 21 Support rod 21a Seat portion 21b Tube wall 22a, 22b Ring-shaped groove 23 Bottomed hole portion 24 Compression spring (biasing means)
25 Cylindrical portion 26 Receiving rod 26a Locking protrusion 27 Engaging portion 27a Outward projecting tooth 28 Set screw

Claims (5)

In a chair comprising: a support structure that supports a seat body so as to be pivotable about a pivot in a vertical direction; and a rotation stop means for stopping the rotation of the seat body.
The seat body includes a support base and a seat supported by the support base from below, and is supported so as to be movable in the vertical direction with respect to the support structure.
The support base has a box shape with an opening at the top, and an internal mounting center portion of the support base is provided with a mounting cylinder portion having a mounting hole.
The mounting tube portion protrudes upward inside the support base, and the mounting hole opens downward in the center of the mounting tube portion,
The rotation stopping means is provided between the attachment hole and a support member at an upper end portion of the support structure that is fitted to the attachment hole so as to be rotatable from below, and the seat body and the support structure Are engaged with each other in a state where they are separated by a predetermined distance in the vertical direction, and by engaging the engaging part and the engaged part for stopping the rotation of the seat body in the vertical direction, the seat body is And a biasing means for biasing elastically in a direction away from the support structure. Either the mounting hole of the support structure and the seat body, comprising a columnar portion the other is rotatably fitted in the mounting hole, the engagement between the engaging portion of the rotation stopping means parts are placed on either one of the mounting holes, respectively integrally to the other is the columnar section, the direction of the irregularities for engagement with the engaging portion and the engaged portion comprises a said mounting hole 2. The chair according to claim 1, wherein the chair is formed so as to intersect with a circumference of the columnar part, and is engaged and disengaged by relative movement of the seat body and the support structure in the vertical direction. The columnar portion provided on one of the support structure and the seat body, the flange portion having a larger diameter than the outer diameter of the columnar portion is provided, it said biasing means in said rotation stopping means, wherein a flange portion, between the counter to the top plate of the expanded diameter hole provided in the mounting hole to a chair according to claim 2, characterized in that provided directly or indirectly. The seat body has a support base, a seat supported on the support base, members having the engaging portion in the rotation stopping means, is disposed at the upper end of the columnar portion, the supporting The chair according to claim 2 or 3, which is exposed in the internal space of the base. Said support structure, which has a vertical leg support post comprises a gas spring which is extendable in the vertical direction by pressing the piston rod, the seat body is high of the seat body by pressing the piston rod The chair in any one of Claims 1-4 provided with the height operation means to adjust height.

Images