JP5280724B2 - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair capable of preventing careless unlocking of locking means for a backrest and damage to the appearance of the chair by providing the locking means for the backrest at a position where it is not easily erroneously operated and is inconspicuous. <P>SOLUTION: The chair is provided with a seat 3 between right and left posts 2 and the backrest 4 so as to be brought down forward at the rear part of the seat 3. In the chair, the right and left posts 2 are connected by a connecting rod 6 in right and left directions at the front of the lower end part of the backrest 4 at an raised position, and the locking means 17 capable of locking the backrest 4 at the raised position is provided between the connecting rod 6 and the lower end part of the backrest 4. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a chair used in, for example, a theater or a public facility, and more particularly to a chair whose backrest can fall forward.

For example, Patent Documents 1 to 3 include, for example, conventional chairs in which the backrest can fall forward.
Japanese Utility Model Publication No. 47-11335 Japanese Patent Publication No.58-121915 Japanese Patent No. 3533115

  In the chair described in Patent Document 1, means for manually locking the backrest in the upright position or releasing the lock is provided at the central portion of the rear surface of the backrest. Therefore, there is a risk that the backrest lock may be easily released due to poor appearance and erroneous operation.

  The chair described in Patent Document 2 is provided with a means for locking the backrest to the use state simply by supporting both sides of the backrest to be able to be tilted up and down by two long and short link pieces. Therefore, if you press the backrest carelessly forward, you may fall forward.

The chair described in Patent Document 3 is provided with lock pins projecting on both sides of the backrest, provided on the inner side surface of the leg column, and in a long hole facing the up-and-down direction with the upper end opening rearward. The backrest is locked in the upright position by engaging it with resistance, and the lock is released by releasing the lock pin from the opening at the upper end of the long hole, and the backrest is moved forward. It is possible to surrender to.
Therefore, when releasing the lock, it is necessary to lift the entire heavy backrest, which is troublesome.
Further, when the chair that is not fixed to the floor is moved, if the backrest is lifted by hand, the lock is automatically released and the backrest may fall forward.

  The present invention has been made in view of the above problems, and by providing the backrest locking means at a position where it is difficult to be erroneously operated and inconspicuous, the lock is inadvertently released or the appearance is impaired. It is an object of the present invention to provide a chair provided with locking means with excellent operability, which can prevent the backrest and can securely lock the backrest in the standing position.

According to the present invention, the above-mentioned problems are solved as follows.
(1) In a chair provided with a seat between the left and right pedestals and having a backrest that can be laid forward in the rear of the seat, in the front of the lower portion of the backrest in the standing position, The left and right pedestals are connected to each other by a connecting rod that faces in the left-right direction, and a locking means that can lock the backrest in an upright position is provided between the connecting rod and the lower end of the backrest.

  With such a configuration, the locking means for locking the backrest in the upright position is provided between the connecting collar connecting the left and right pedestals and the lower part of the backrest, so that the locking means is externally provided. It is not exposed, so that it can be prevented from being erroneously operated and unlocked, and the backrest can be prevented from inadvertently falling forward, and the appearance is also improved.

(2) In the above item (1), the locking means is provided on one of the connecting rod and the lower portion of the backrest, and has a stop member having an engaging groove facing downward in the lower end and opening downward, Similarly, a handle that is provided on the other side so as to be movable up and down, and that can be operated downward against the upward biasing means, and a lock that is provided on the handle and that can be engaged and disengaged from below in the engagement groove. It shall be provided with a pin.

  With such a configuration, the backrest can be reliably locked in the upright position by engaging the lock pin provided in the handle in the left-right direction with the engagement groove opened downward in the stop plate. The lock can be released simply by operating the handle downward against the upward biasing means, so that the operability is also good. In particular, when the handle is provided on the lower front side of the backrest, it is easy to operate downward, and the unlocking by the handle and the fall of the backrest are performed continuously with the lower end of the backrest held. It can be carried out.

(3) In the above item (2), a plurality of stop members are provided separated in the left-right direction.

  With such a configuration, the plurality of positions in the left and right direction of the lock pin are engaged and locked with the engagement grooves of the plurality of stop plates, so that the backrest can be stably stopped and held in the standing position. .

(4) In the above item (2) or (3), the handle is suspended by a pair of left and right tension coil springs as upward biasing means.

  With such a configuration, the pair of left and right tension coil springs that urge the handle upward also serve as a handle suspension member, so that the number of parts and assembly man-hours can be reduced.

(5) In any one of the above items (2) to (4), a guide member having a pair of left and right side pieces is attached to either the rear surface of the connecting rod or the lower front surface of the backrest. The handle is slidably accommodated between the both side pieces, and both ends of the lock pin protruded from the both side ends of the handle are provided in the guide holes facing the up and down direction provided in the left and right side pieces, Fits slidably up and down.

  With such a configuration, the handle is guided by the both side pieces of the guide member to move in the vertical direction, and both end portions of the lock pin also slide up and down in the guide holes facing the vertical direction of the both side pieces of the guide member. Since the fitting is possible, the wobbling in the front / rear and left / right directions of the handle can be prevented, the operation can be stably performed, and the lock pin can be smoothly detached from the engagement groove.

(6) In any one of the above items (2) to (5), the lock pin abuts on the lower end of the free end of the stop member when the backrest stands, so that it can be guided to the lower end of the engagement groove. A guide surface facing diagonally up and down is formed.

  With such a configuration, when the backrest is raised, the lock pin is guided to the guide surface of the stop plate and automatically engages with the engagement groove, so there is no need to operate the handle.

  According to the present invention, since the locking means for locking the backrest in the upright position is not exposed to the outside, it is erroneously operated and the lock is released, and the backrest may inadvertently fall forward or the appearance may be impaired. Can be prevented.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a connecting chair used in a theater or the like, which is an embodiment of the present invention, FIG. 2 is a rear perspective view when the backrest is fallen forward, and FIG. It is a center vertical expansion side view of the state which raised the seat.

  The connecting chair 1 includes a seat 3 between three adjacent pillars 2 which are fixed to the floor with anchor bolts at the front and rear lower ends (hereinafter referred to as the left side in FIG. 1). The seat 3 and the backrest 4, and the left and right pedestals 2 and 2 adjacent to each other constitute a left and right single chair 5 and 5.

Each pedestal 2 includes a front leg 2a facing rearward and upward, a substantially vertical rear leg 2b connected to the upper end thereof, and a connecting plate 2c connecting the opposing surfaces of the intermediate portions in the vertical direction. The side shape is generally A-shaped.
By fixing the fixing pieces 7 fixed to both side ends of the connecting rod 6 facing in the left-right direction to the opposing surfaces of the rear end portions of the connecting plates 2c by using screws 8 between the left and right adjacent pedestals 2; Are connected to each other.

  An armrest strut 10 having an inverted triangular opening 9 is integrally constructed on the front surface of the front leg 2a in the vertical direction and on the upper surface of the connecting portion between the front leg 2a and the rear leg 2b. An elbow rest 11 is attached to the upper surface of the horizontal piece 10a facing.

  The seats 3 of the left and right single chairs 5 are pivotally mounted on the opposite surfaces of the left and right pedestals 2 and 2 by pivots 12 facing the left and right sides of the left and right sides close to the rear part, As shown in FIG. 3, when not in use, it can be flipped upward.

  The backrest 4 has a back plate 13 whose lower end is positioned below the connecting rod 6 and whose upper half extends upward from the upper end of the pedestal 2 and is bent rearward. The upper end of a pair of left and right support pieces (only one is shown) 15, which is composed of a backrest 14 made of a cushion material attached to the front surface excluding the lower end, and is attached to the front of both side ends at the lower part of the back plate 13. Is pivoted to the inner surface of the upper end portion of the rear leg 2b of the pedestal 2 by the support shaft 16 facing in the left-right direction, so that it can be rotated between the standing position and the lying position where the upper front surface is in contact with the upper surface of the seat 3. It can be moved.

Locking means 17 for locking the backrest 4 in the upright position is provided on the rear surface of the central portion in the left-right direction of the connecting rod 6 in the left and right chairs 5 and the front surface of the central portion in the left-right direction at the lower end portion of the back plate 13. Yes.
As shown in detail in FIG. 4 to FIG. 7, the lock means 17 faces in the front-rear direction perpendicular to the connecting rod 6, and the front end is welded to the rear surface of the connecting rod 6. Two stop plates 19, 19 having a U-shaped engagement groove 18 at the lower end and attached to the front surface of the back plate 13 facing the stop plates 19, both stop plates 19 are manually operated. The engaging groove 18 and the operation mechanism 20 that can be engaged and disengaged are included.
The front outer peripheral surface of the lock pin 23 to be described later is in contact with the lower end of the rear end that is the free end side of both stop plates 19, thereby guiding this to the lower end of the engagement groove 18 and engaging the lock pin 23. A guide surface 19a that can be automatically engaged with the groove 18 and is inclined in an arc shape in an obliquely vertical direction is formed. The guide surface 19a may simply be an inclined surface that faces obliquely up and down.

  The operating mechanism 20 has a guide member 21 having a U-shape in a plan view, a handle 22 accommodated in the guide member 21 so as to be movable up and down, and moves up and down together with the handle 22. The engagement groove 18 is provided with a lock pin 23 facing in the left-right direction that can be engaged and disengaged from below, and a pair of left and right tension coil springs 24, 24 that always urge the handle 22 upward. By fixing the square mounting plate 21a to the front surface of the center of the lower end of the back plate 13 with four set screws 25 on the top, bottom, left and right, the entire operation mechanism 20 is mounted on the front of the center of the back plate 13 in the rear. It is attached so that it cannot be seen from.

  The handle 22 has a U-shaped handle body 26 that is a U-shaped front view in which a pair of left and right side pieces 26b, 26b are connected to both side ends of a plate-like base piece 26a facing in the vertical direction. A plate in which a handle portion 27a having a rearward U-shaped cross section projecting forward is formed at the lower end portion and is spot-welded to the front surface of the base piece 26a so as to be close to or in contact with the opposing surface of the side piece 26b. The handle 22 includes a guide member 27 such that the outer side surfaces of the side pieces 26b, 26b of the handle body 26 are close to the inner side surfaces of the left and right side pieces 21b, 21b of the guide member 21. 21 is accommodated so as to be movable up and down.

At the upper end of the base piece 26a of the handle main body 26 and the pulling member 27, a notch 28 having a U-shape facing upward is formed in such a size that the left and right stop plates 19, 19 can be recessed.
The upper end portions on both sides of the notch 28 in the handle member 27 extend obliquely rearward and upward from the upper end of the base piece 26 a of the handle body 26, and the rear surface of the upper end is above the lock pin 23 and the front surface of the guide member 21. Further, a gap is formed between the base piece 26a and the upper end of the base piece 26a. In this way, when the handle 22 is pulled down against the tension coil spring 24, it is difficult for the lower end of the handle 22 to turn forward about the lock pin 23, and the lower end of the handle 22 is placed on the front surface of the guide member 21. It is possible to stably operate downward in the state where it is in contact with (see FIG. 5).
The base piece 26a of the handle body 26 and the central portion of the handle member 27 are sized so that two lower left and right set screws 25 and a tool for screwing them can be inserted from the front. Long holes 29 and 29 having a vertical dimension that can be pulled down without interfering with the head of the set screw 25 are formed.

  Both end portions of the lock pin 23 described above are inserted into shaft holes 30, 30 formed in the upper end portions of the left and right side pieces 26 b, 26 b in the handle body 26, and both end portions projecting from both shaft holes 30 are The guide member 21 is slidably fitted up and down in guide holes 31 and 31 that are formed in the left and right side pieces 21b and 21b of the guide member 21 and face in the vertical direction. Snap rings 32, 32 are fitted into annular grooves (not shown) formed on the outer peripheral surfaces of both end portions of the lock pin 23, and the lock pin 23 is prevented from coming off from the guide hole 31.

  The arc-shaped lower end 24a extending downward from the tension coil springs 24, 24 is hooked on both side end portions of the lock pin 23 in the inward vicinity of the both side pieces 26b of the handle body 26, and also extends upward. The upper end 24b of the inverted U-shape that protrudes is hooked by a notch recess 33 formed at the rear end of the left and right side pieces 21b, 21b of the guide member 21. As a result, the handle 22 is suspended by the left and right tension coil springs 24, 24 in the guide member 21, and is urged obliquely rearward and upward to be prevented from moving downward. (See FIGS. 4 and 6).

  In order to allow the backrest 4 in the standing position to fall forward, a hand is placed on the handle portion 27a of the handle member 27 in the handle 22, and the entire handle 22 is attached to the tension coil spring 24 as shown by the arrow in FIG. Pull down against power. Then, the lock pin 23 is disengaged from the engagement grooves 18 of the left and right stop plates 19, the lock is released, and the backrest 4 can be laid forward.

  When the lying backrest 4 is raised and the lock pin 23 is engaged with the engagement groove 18 of the stop plate 19, the backrest 4 is locked in the standing position. When the backrest 4 stands up, the front outer peripheral surface of the lock pin 23 comes into contact with the guide surface 19a formed in the lower part of the rear ends of the left and right stop plates 19 and inclined in an arc shape in the obliquely vertical direction. Since the lock pin 23 is automatically engaged and locked in the engagement groove 18 by being guided by the guide surface 19a and guided forward and downward, it is not necessary to operate the handle 22.

  As described above, in the single chair 5 of the above embodiment, the locking means 17 of the backrest 4 is connected to the connecting rod 6 connecting the left and right pedestals 2 and the lower end portion of the back plate 13 in the backrest 4. Since the lock means 17 is erroneously operated and the backrest 4 does not inadvertently fall forward, the appearance is good.

  Further, if the handle 22 is not operated downward, the backrest 4 is not unlocked. When applied to a movable chair, the lower end of the backrest 4 is lifted with a hand. However, there is no fear of the lock being released and it is safe.

  Further, the left and right stop plates 19 are fixed to the connecting rod 6, and the lock pin 23 facing in the left-right direction is engaged with the engaging groove 18 that opens downward in the connecting rod 6. Since it can be surely locked and the lock can be released simply by placing the hand on the handle portion 27a and pulling down the handle 22, the operability is also good. Moreover, the unlocking by the handle 22 and the overturning of the backrest 4 can be performed in a continuous operation while holding the lower end portion of the back plate 13.

  In the above embodiment, the stop plate 19 is provided on the connecting rod 6 and the operation mechanism 20 is provided on the backrest 4. Conversely, the stop plate 19 is provided on the backrest 4 side and the operation mechanism 20 is provided on the connecting rod 6 side. These can also be provided in the opposite direction to the previous embodiment.

  In the above embodiment, the lower ends of the pair of left and right tension coil springs 24 are hooked on both ends of the lock pin 23, and the handle 22 is suspended via the lock pin 23. For example, a latching hole may be provided in the portion, and the lower end of the tension coil spring 24 may be latched on this portion, and the handle 22 may be directly supported.

It is a side view of the connection chair to which the present invention is applied. Similarly, it is a perspective view of a state where the backrest is lying down forward. Similarly, it is a center longitudinal cross-section enlarged side view of the state where the seat is flipped up. It is an enlarged view of the A section of FIG. Similarly, it is an enlarged view when the backrest lock is released. FIG. 6 is an enlarged vertical front view of the VI-VI line in FIG. 4. FIG. 7 is an enlarged cross-sectional plan view taken along line VII-VII in FIG. 6.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Connection chair 2 Leg 2a Front leg 2b Rear leg 2c Connection board 3 Seat 4 Backrest 5 Single chair 6 Connection rod 7 Fixed piece 8 Screw 9 Opening 10 Armrest strut 10a Horizontal piece 11 Elbow rest 12 Support shaft 13 Back plate 14 Back rest DESCRIPTION OF SYMBOLS 15 Support piece 16 Support shaft 17 Locking means 18 Engagement groove 19 Stop plate 19a Guide surface 20 Operation mechanism 21 Guide member 21a Mounting plate 21b Side piece 22 Handle 23 Lock pin 24 Tension coil spring 24a Lower end 24b Upper end 25 Set screw 26 Handle body 26a base piece 26b side piece 27 handle member 27a handle portion 28 notch 29 long hole 30 shaft hole 31 guide hole 32 snap ring 33 notch recess

Claims (5)

In a chair provided with a seat between the left and right pedestals and with a backrest that can be laid forward in the back of the seat, the left and right legs in front of the lower portion of the backrest in the standing position The columns are connected to each other by a connecting rod that faces in the left-right direction, and a locking means that can lock the backrest in an upright position is provided between the connecting rod and the lower end portion of the backrest, and the locking means is connected to the connecting portion. A stop member provided on one of the lower part of the heel and the backrest and having an engaging groove facing upward and downward opening at the lower end, and also provided on the other side so as to be movable up and down, and upward biasing A chair comprising: a handle that can be operated downward against the means; and a lock pin that is provided on the handle and that faces the left and right of the engagement groove and can be engaged and disengaged from below . Stop member, formed by plurality by spaced in the lateral direction claim 1 chair according. The chair according to claim 1 or 2 , wherein the handle is suspended by a pair of left and right tension coil springs as upward biasing means. A guide member having a pair of left and right side pieces is attached to one of the rear surface of the connecting rod and the lower front surface of the backrest, and a handle is slidably accommodated between the both side pieces of the guide member. together, the locking pin is projected from both side ends of the handle both ends, the guide hole facing the vertical direction is provided on a side piece of the right and left, of claims 1 to 3 comprising slidably fitted in the upper and lower A chair according to any one. The free end lower portion of the stop member, by the locking pin abut during backrest erect, claims by forming a guide surface facing the oblique vertical capable of inducing this to the lower end of the engagement groove 1-4 A chair according to any of the above.

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