JP6537294B2 - bed - Google Patents

Description

  The present invention relates to an improvement of a bed provided with a leg which supports the bottom switchably between the use state in which the level of the upper surface of the bottom of the bed is raised and the non-use state in which the bed is lowered.

  Conventionally, a bed is provided with a leg 200 supporting the bottom 100 so as to be switchable between a use state in which the level of the upper surface of the bottom 100 on which the bed is placed is raised and a use state in which the bed is lowered. The structure shown in FIG. 12 is used.

  Such a bed has a leg 200 whose leg upper end 200a is rotatably assembled to the bottom 100 so that the leg lower end 200b can be positioned at a folded position in contact with or close to the bottom 100, and an arm proximal end 300a. The arm lower side 300b is used as a sliding contact guide to the engaging portion 200c provided on the leg 200, and the arm free end 300c, while being rotatably assembled to the bottom 100 at a position different from the leg upper end 200a of the leg 200. An engaging recess 300d into which the engaging portion 200c guided to the sliding guide portion enters on the side, and is folded between the leg 200 and the bottom 100 when the leg 200 is in the folding position. And a lock arm body 300 to be supported.

  Then, in such a bed, the engaging portion 200c is slid on the sliding contact portion along with the rotation of the leg 200 from the folding position (FIG. 11) by the lifting operation of the bottom 100 to the unfolding position (FIG. 12). The engaging portion 200c is inserted into the engaging recess 300d of the lock arm 300 which is deployed and rotated while being in contact with the engaging portion 200c so as to maintain the leg 200 in the deployed position.

  The present applicant has previously disclosed that in this type of bed, it is possible to stably ensure that the legs are in the deployed position and the bed is in a use state where the level of the upper surface of the bottom is raised. Patent Document 1 listed below discloses such a device.

Patent No. 5106475 gazette

  The main problem to be solved by the present invention is shown in Patent Document 1 in which the legs of this type of bed are in the deployed position and the bed is in use with the level of the upper surface of the bottom raised. It is in the point that it is possible to secure stably with the method and another method.

In order to achieve the above object, according to the present invention, the bed is rotatably assembled such that the upper end of the leg is rotatably mounted on the bottom on which the bed is placed, and the lower end of the leg is in contact with or close to the bottom. Legs that can be positioned in
The arm base end is rotatably assembled to the bottom at a position different from the leg upper end of the leg, and the arm lower side is a sliding contact guide to an engaging portion provided on the leg, and the arm free end side A lock arm which is foldably supported between the leg and the bottom when the leg is in the folding position, and the engaging portion is provided with an engaging recess which is guided to the sliding guide portion. Equipped with the body,
The engagement of the lock arm body deployed and pivoted while causing the engagement portion to be in sliding contact with the sliding contact portion as the leg is pivoted from the folded position to the deployed position by the lifting operation of the bottom The bed in which the engaging portion enters the recess in the deployed position to maintain the leg in the deployed position,
The arm free end of the lock arm body is provided with a handlebar whose bar central axis is parallel to the pivot axis of the lock arm body,
The leg is rotatably provided in the reference position and the engagement position, and is engaged with the handle bar in the deployed position of the leg to inhibit the upward rotation of the lock arm. It is a thing provided with a lock auxiliary body.

  According to this configuration, it is possible to stably maintain the state in which the legs are in the deployed position with a simple structure. That is, in the deployed position of the leg, the engaging portion of the leg which has entered the engaging recess of the lock arm does not come out of the engaging recess unless the lock arm is rotated upward, As long as the engagement with the handle bar is not released, the upward movement of the lock arm is restrained by the lock auxiliary body in the engaged position.

  It is considered to be one of the preferred embodiments of the present invention to have biasing means for constantly biasing the lock assisting body toward the reference position.

Further, the lock assisting body has a lower open receiving recess for receiving the handle bar when the leg is in the deployed position.
A base rotatably coupled to the leg;
A claw body rotatably combined with the base and having a portion serving as one of left and right inner walls of the receiving recess;
And a biasing means for the claw body,
By the contact of the handle bar with the claw body accompanying the rotation operation of the lock assisting body at the reference position to the engagement position, the claw body is rotated against the bias of the biasing means. It is one of the preferable aspects of the present invention to receive the handle bar in the receiving recess.

  Further, in a state in which the leg body is in a position immediately before reaching the deployed position where the engaging portion is in contact with the sliding contact portion in the vicinity of the engaging concave portion, rotation of the lock auxiliary body toward the engaging position It is considered as one of the preferable embodiments of the present invention that the movement of the claw body against the biasing of the biasing means does not occur by the moving operation.

  In this case, the operator can be made aware that the engaging portion of the leg is not engaged with the engaging recess of the lock arm through the operation of the lock auxiliary body.

  In the bed according to the present invention, the locking support and the handlebar are engaged when the leg supporting the bottom is in the deployed position and the bed is in the use state in which the level of the upper surface of the bottom is raised. Can be secured stably.

FIG. 1 is a side view of a bed according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the relevant part. FIG. 3 is an exploded perspective view of the relevant part. FIG. 4 is a partially cutaway side view of the bed with the legs in the folded position. FIG. 5 is a side view of the main part of the bed, in which the legs are in the deployed position. FIG. 6 is a perspective view of a main part of the bed (a view) and a side view of the main part (b) when the lock auxiliary body is at the reference position. FIG. 7 is a perspective view of the main part (a view) of the bed and a side view of the main part (b) when the lock auxiliary body is turned toward the engagement position and the handle bar abuts the claw; Figure). FIG. 8 is a perspective view of a main part of the bed (a view) and a side view of the main part (b) when the lock auxiliary body is in the engaged position. FIG. 9 is a cross-sectional view of an essential part of the bed at the location where the lock assisting body is provided. FIG. 10 is a side view of the main part of the bed in which the leg in contact with the sliding contact portion in the vicinity of the engagement recess is in the position immediately before reaching the deployed position. FIG. 11 is a side view of a conventional bed. FIG. 12 is a side view of a conventional bed.

   Hereinafter, based on FIGS. 1-10, the typical embodiment of this invention is described. Here, FIG. 1 shows the bed long side according to the embodiment as viewed from the side, and FIG. 2 shows the members constituting the right side of FIG. 1 separated. Each component which comprises the left side of is shown in the separated state. 4 is an enlarged view of the right part of FIG. 1 of the bed in the non-use state in which the level of the upper surface 10 of the bottom 1 is lowered, and FIG. 5 is an application in which the level of the upper surface 10 of the bottom 1 is increased. The principal part on the right side in FIG. 1 of the bed in the state is shown enlarged.

  The bed according to this embodiment includes the leg 2 supporting the bottom 1 so as to be switchable between a use state in which the level of the upper surface 10 of the bottom 1 on which the bed is placed is raised and a use state in which the bed is lowered. And is typically used as a child bed that constitutes a parent-child bed (also referred to as a pair bed etc.). The bed is provided with a lock arm 3 supporting the leg 2 of the bed and provided with a lock auxiliary body 4 for stably maintaining the bed in a use state.

  When the bed according to this embodiment is a child bed, the upper surface 10 of the bottom 1 is positioned at a level lower than the lower surface of the bottom of the parent bed (not shown) constituting the parent-child bed in the non-use state. Configured Then, in the non-use state, it is placed as a child bed under the bottom of the parent bed. When the bed according to this embodiment is a small bed, the upper surface 10 of the bottom 1 is configured to be positioned at substantially the same level as the upper surface of the bottom of the parent bed in the use state.

  In this embodiment, the bottom 1 is configured to have a substantially rectangular shape in a plan view. Reference numeral 11 in the figure is a frame for forming the outer shell of the bottom 1. Bedding such as a mattress is placed on the top surface 10 of the bottom 1. Typically, the frame 11 of the bottom 1, the support member 12 of the bedding to be erected in the frame 11, the leg 2 to be described later, and the lock arm 3 are made of metal.

  The legs 2 are respectively provided on the left and right sides of the bottom 1 on the head side and the foot side of the bottom 1 in the illustrated example. That is, the bottom 1 is supported by the four legs 2. Note that the bed according to this embodiment has a configuration in which the head side and the foot side are not conceptually considered, so in the present specification, the right side of FIG. , The left side is the foot side.

   In the illustrated example, each leg 2 is rotatably assembled with the upper end 20 of the leg on the bottom 1 so that the lower end 21 of the leg can be positioned in a folded position in contact with or close to the bottom 1. Each leg 2 is configured to have a square tube shape. The upper end 20 of each leg 2 is rotatably combined with the frame 11 of the bottom 1 with an axis 20 a extending in the left-right direction of the bottom 1. Further, each lower end 21 of each leg 2 is provided with a caster 21 a. The rotation axis of the caster 21 a is also along the left-right direction of the bottom 1.

  More specifically, on the head side of the bottom 1, the connecting rod 22 is installed between the leg lower ends 21 of the left and right legs 2, 2 to integrate the left and right legs 2, 2. . Further, a round rod body 23 is provided between the left and right legs 2, 2 at a position substantially midway in the longitudinal direction. That is, the right end of the rod is integrally connected to the inner side of the right leg 2 and the left end of the left end is integrally connected to the inner side of the left leg 2. Is also connected by the round bar 23 above the connecting bar 22. A seat plate attached by welding one side of a plate to the connecting bar 22 and connecting one side of the plate adjacent to the side of the plate to the leg 2 between the connecting bar 22 and the round bar 23 An auxiliary caster 25 is pivotally mounted on the lower surface of the seat 24 with an axis perpendicular to the surface of the seat plate 24. The leg upper end 20 of the leg 2 is rotatably assembled on the inner side of the frame 11 with the shaft 20 a at a position separated from the head-side edge of the bottom 1 by the length dimension of the leg 2. It is done. The leg 2 has a caster 21a provided at the lower end 21 of the leg 21 located below the edge on the head side of the bottom 1 in the folded position, and is disposed laterally along the lower surface of the bottom 1. The bottom 1 is supported by bringing the auxiliary caster 25 into contact with the floor surface in the folded position. (Figure 4)

  Further, also on the foot side of the bottom 1, the connecting rod body 22 is installed between the leg lower end 21 sides of the left and right legs 2, 2 to integrate the left and right legs 2, 2. Further, on the foot side of the bottom 1 as well, a round rod body 23 is provided between the left and right legs 2, 2 at a position substantially midway in the length direction. That is, the right end of the rod is integrally connected to the inner side of the leg 2 on the right side, and the rod end of the left end is integrally connected to the inner side of the leg 2 on the left. The left and right legs 2 are also connected by the round rod 23 above the connecting rod 22. A seat plate attached by welding one side of a plate to the connecting bar 22 and connecting one side of the plate adjacent to the side of the plate to the leg 2 between the connecting bar 22 and the round bar 23 An auxiliary caster 25 is pivotally mounted on the lower surface of the seat 24 with an axis perpendicular to the surface of the seat plate 24. Also on the foot side of the bottom 1, the leg upper end 20 of the leg 2 is placed on the inner side of the frame 11 at a distance from the edge on the foot side of the bottom 1 by the length dimension of the leg 2. It is rotatably assembled with the shaft 20a. Also on the foot side of the bottom 1, the leg 2 has the caster 21a provided at the lower end 21 of the leg located below the edge on the foot side of the bottom 1 in the folded position, and is disposed laterally along the lower surface of the bottom 1. It has become so. The bottom 1 is supported by bringing the auxiliary caster 25 into contact with the floor surface in the folded position.

  By positioning the four legs 2 configured in this manner in the folded position, the bed is in a non-use state. (FIG. 3) When the bottom 1 is lifted from this state, each of the four legs 2 is pivoted to move its upper end 20 away from the bottom 1 by its own weight, and will be described later at a predetermined pivot position. It is supported by the lock arm body 3. That is, the predetermined rotational position is the unfolded position of the leg 2. In the unfolded position, the leg 2 brings the casters 21a into contact with the floor surface to support the bottom 1, and the bed is put into use. (FIG. 5) In the illustrated example, the leg 2 is rotated to a position where the angle between the leg 2 and the bottom 1 is about 65 degrees.

  In the illustrated example, on the head side of the bottom 1, the gas spring 26 is disposed between one of the left and right legs 2 and 2 and the inner portion of the frame 11 on the head side. Further, on the foot side of the bottom 1, a gas spring 26 is disposed between one of the left and right legs 2 and 2 and the inner side of the frame 11 on the foot side. Each gas spring 26 pivotally mounts the piston rod 26 a to the leg 2 and pivotally mounts the end 26 c opposite to the projecting side of the piston rod 26 a of the cylinder 26 b to the inner portion of the frame 11. Then, when the leg 2 is in the folded position, the piston rod 26a is pushed most into the cylinder 26b to increase the reaction force (force in the pushing direction) against the piston rod 26a. (FIG. 4) In the illustrated example, when the leg 2 is in the folded position, the pivotally assembled position of the leg upper end 20 of the leg 2 is positioned forward of the bearing position of the piston rod 26a. When the leg 2 is in the folded position (FIG. 4), the gas spring 26 does not act. From this state, the bottom 1 is lifted and the leg 2 is slightly turned to the deployed position, and the piston rod 26a is mounted below the pivotally assembled position of the leg upper end 20 of the leg 2 Since it comes to be positioned, extension of the piston rod 26a by the reaction force is permitted, and this extension is adapted to assist the pivoting of the leg 2 to the deployed position.

  The bed according to this embodiment further includes a lock arm 3 that releasably maintains the state where the leg 2 is in the deployed position. In the illustrated example, the lock arm body 3 is provided corresponding to each of the four legs 2, and four lock arm bodies 3 are also provided.

  Each lock arm body 3 is pivoted to the bottom 1 at a position different from the upper end 20 of the arm base end 31 which is located at the arm end opposite to the arm free end 30 and which is positioned upward when the bed is in use. It is possible to assemble.

   In the illustrated example, the lock arm body 3 has substantially the same length as the leg 2. It is also configured in the form of an elongated plate with a wide longitudinal side 32 and a narrow and transverse arm lower side 33 and an arm upper side 34.

  On the head side of the bottom 1, the left and right lock arm bodies 3, 3 are both positioned inside the left and right legs 2, 2, and the arm base end 31 is the width of the frame 11 on the head side. It is rotatably assembled with a shaft 31a along the left and right direction with respect to the inner side of the side. The left and right lock arm bodies 3 and 3 are integrated by a connecting rod body 35 installed between approximately mid-longitudinal positions in the longitudinal direction. The lower arm side portions 33 of the left and right lock arm bodies 3 and 3 are always positioned on the round rod 23 bridged between the left and right legs 2 and 2, whereby the lock arm body 3 is formed. Is positioned sideways with the arm free end 30 close to the bottom 1 when the leg 2 is in the folded position and slides the arm lower side 33 when the leg 2 is pivoted towards the deployed position While being brought into sliding contact with the round bar body 23 of the leg 2 as the contact guide portion 33a, the arm free end 30 is unfolded and turned in a direction to direct the arm free end 30 downward. Also, the arm free ends 30 of the left and right lock arm bodies 3 and 3 are integrally connected to the handlebar 36, respectively. The right end of the handle bar 36 is located below the right leg 2 and protrudes outward beyond the outer surface 27 of the right leg 2, and the left end of the handle bar 36 is located below the left leg 2 And protrudes outward more than the outer surface 27 of the left leg 2. That is, the handle bar 36 is provided at the arm free end 30 of the lock arm body 3 so that the bar central axis is parallel to the rotation axis of the lock arm body 3.

  Also on the foot side of the bottom 1, the left and right lock arm bodies 3, 3 are both positioned inside the left and right legs 2, 2 and the arm base end 31 is the frame 11 on the foot side. It is rotatably assembled with an axis extending in the left-right direction with respect to the inner side on the width side of the frame. Also on the foot side of the bottom 1, the left and right lock arm bodies 3 and 3 are integrated by a connecting rod body 35 installed between the substantially middle position in the longitudinal direction. Also on the foot side of the bottom 1, the arm lower side portions 33 of the left and right lock arm bodies 3, 3 are always positioned on the round bar body 23 provided between the left and right legs 2, 2. Thus, when the leg 2 is in the folded position, the lock arm 3 is positioned in the sideways position with the arm free end 30 close to the bottom 1 and the leg 2 is pivoted towards the deployed position Then, while the arm lower side portion 33 is in sliding contact with the round bar body 23 of the leg 2, the arm free end 30 is deployed and turned downward. Also on the foot side of the bottom 1, the arm free ends 30 of the left and right lock arm bodies 3 and 3 are integrally connected to the handlebar 36 respectively. The right end of the handle bar 36 is located below the right leg 2 and protrudes outward beyond the outer surface 27 of the right leg 2, and the left end of the handle bar 36 is located below the left leg 2 And protrudes outward more than the outer surface 27 of the left leg 2. That is, the handle bar 36 is provided at the arm free end 30 of the lock arm body 3 so that the bar central axis is parallel to the rotation axis of the lock arm body 3.

  Further, a notch formed on the arm free end 30 side of each lock arm body 3 from the arm lower side 33 side to the arm upper side 34 side penetrates in the left-right direction and the entrance 37a downward. A facing engagement recess 37 is provided. The engagement recess 37 has an inner back portion 37b for receiving the round rod 23 installed between the left and right legs 2 and 2 and an inlet 37a following the inner back portion 37b (FIG. 4).

  And, in this embodiment, the lock arm body 3 slides on the arm lower side portion 33 when the leg 2 is turned from the folded position to the deployed position by the lifting operation of the bottom 1. The arm free end 30 is deployed and turned downward while being in sliding contact with the round bar body 23 of the leg 2 as 33a, and the round bar is engaged with the engagement recess 37 when the leg 2 reaches the deployed position. The body 23 penetrates, thereby blocking the pivoting of the leg 2 which has reached the deployed position to the folded position and maintaining the bed in the use state. In the illustrated example, the lock arm body 3 is deployed and rotated to a position at which the angle formed with the lower surface of the bottom 1 is about 35 degrees, and at this position, the engagement recess 37 receives the round bar 23 and this position And the leg 2 intersect at an angle of about 90 degrees.

  That is, in this embodiment, the round bar body 23 of the leg body 2 functions as an engagement portion 23 a engaged with the engagement recess portion 37 of the lock arm body 3. The lock arm 3 is foldably supported between the leg 2 and the bottom 1 when the leg 2 is in the folded position. The support state of the leg 2 in the deployed position by the lock arm 3 is such that the lock arm 3 is pivoted upward using the handle bar 36 and the engagement portion 23 a is disengaged from the engagement recess 37 The leg 2 can be pivoted back to the folded position by pressing the bottom 1 downward from this state. In the drawing, reference numeral 38 denotes a recess formed in the lock arm body 3 to accommodate the upper end of the engaging portion 23a in the folded position of the leg 2.

  Further, the leg 2 is rotatably provided between the reference position and the engagement position, and is engaged with the handle bar 36 at the spread position of the leg 2 to be located above the lock arm 3 The lock auxiliary body 4 is provided to suppress the turning to the lower side.

  In the illustrated example, the lock assisting body 4 is provided on one of the outer surfaces 27 of the left and right legs 2, 2 on the head side and the foot side of the bottom 1, respectively.

  Further, the leg body 2 is provided with urging means 40 for always urging the lock auxiliary body 4 toward the reference position.

  The lock auxiliary body 4 has a lower open receiving recess 41 for receiving the handle bar 36 when the leg 2 is in the deployed position.

  The lock auxiliary body 4 is rotatably combined with the leg 2 and has a base 42 provided with a first portion 42 a which is one of the left and right inner walls 41 a and 41 a of the receiving recess 41, and the base 42. And a biasing member 44 for the claw 43. The claw 43 has a second portion 43a that is rotatably combined with the other of the left and right inner walls 41a and 41a of the receiving recess 41. .

  In the illustrated example, the base 42 has one end pivotally attached to the leg 2 at the same position as the axial attachment position of the piston rod 26a of the gas spring 26, and the other end has a projecting portion 42b serving as the first portion 42a. And a tip edge portion 42 c which is to be the inner back portion 41 b of the receiving recess 41. At the bearing position of the base 42, winding of a torsion coil spring 40a having one arm fixed to the base 42 and the other arm fixed to the leg 2 between the base 42 and the leg 2 The part is supported, and the lock auxiliary body 4 is always urged toward the reference position by the torsion coil spring 40a. In the figure, reference numeral 28 is a stopper provided on the leg 2, and the lock auxiliary body 4 abuts one of the left and right side edge portions 42d extending between one end and the other end of the base 42 against the stopper 28 at the reference position. It looks like (Figure 6).

  Further, in the illustrated example, the claw body 43 is rotatably combined with the other end side of the base 42 on the outer surface side of the base 42. The claw body 43 has one end pivotally attached to the projecting portion 42b of the base 42, and the other end having a projecting portion 43b constituting the second portion 43a, and the receiving portion between the projecting portion 43b and one end It has a configuration provided with a portion 43 c to be the inner back portion 41 b of the recess 41. Between the claw 43 and the base 42, one arm is fixed to the base 42 and the other arm is fixed to the claw 43 at the bearing position of the claw 43, and a coil spring 44a is wound. The turning portion is supported, and the claw 43 is positioned by the torsion coil spring 44a at a pre-rotation position where the second portion 43a is positioned parallel to the first portion 42a. In the figure, reference numeral 43d is a stopper provided on the claw body 43. The claw body 43 is mounted on one of the left and right side edge portions 42d extending between one end and the other end of the base 42 at the pre-rotation position. It is supposed to strike. On the other end side of the claw body 43, a cam edge 43e is formed on the outer side of the second portion 43a, following a circular arc of a virtual circle whose inside position is the curved inner side.

And, in this embodiment, from the state where the leg 2 is positioned at the deployed position, the lock assisting body 4 at the reference position is rotated against the bias of the torsion coil spring 40a as the biasing means 40. When the moving operation is performed, the cam edge 43e of the claw 43 abuts on a portion of the handle bar 36 which protrudes laterally beyond the outer surface 27 of the leg 2 to urge the torsion coil spring 44a as the urging means 44. The claw body 43 is pivoted to prevent the handle bar 36 from being received in the receiving recess 41.

  Thereby, in the bed according to this embodiment, the state in which the leg 22 is in the deployed position can be stably maintained with a simple structure. That is, the engagement portion 23a of the leg 22 which has entered the engagement recess 37 of the lock arm 33 at the deployed position of the leg 22 can be disengaged from the engagement recess 37 unless the lock arm 3 is rotated upward. If not, the upward movement of the lock arm body 3 is restrained by the lock auxiliary body 4 in the engaged position unless the lock auxiliary body 4 and the handle bar 36 are disengaged.

  The lock assisting body 4 in the reference position can be turned toward the engaged position by using an operation knob indicated by reference numeral 45 in the figure.

  When the lock auxiliary body 4 having the handle bar 36 received in the receiving recess 41 is in the engaged position, the claw 43 is rotated against the biasing force of the torsion coil spring 44 a as the biasing means 44. It is canceled by doing. This pivoting operation can be performed using an operation knob indicated by reference numeral 43f in the figure. When the operation knob 43f is released after the rotation operation, the claw 43 is forcibly returned to the pre-rotation position by the biasing of the torsion coil spring 44a as the biasing unit 44, and the biasing unit 40 The lock assisting body 4 is forcibly returned to the reference position by the biasing of the torsion coil spring 40a.

Further, in this embodiment, as shown in FIG. 10, the engaging portion 23a is in the vicinity of the engaging concave portion 37 at a position immediately before reaching a deployed position in contact with the sliding guide portion 33a. In the state where the leg 2 is present, the pivoting operation of the lock auxiliary body 4 toward the engagement position is made not to cause the pivoting of the claw 43 against the biasing of the biasing means 44 . That is, in the state shown in FIG. 10, when the lock auxiliary body 4 located at the reference position is turned toward the engagement position, the lock arm body 3 is moved to a portion 43g where the cam edge 43e of the claw body 43 is not formed. The claw 43 is not rotated against the urging of the torsion coil spring 44a as the urging means 44 at the end. Thereby, in the present embodiment, the operator recognizes that the engagement portion 23a of the leg 2 is not engaged with the engagement recess 37 of the lock arm 3 through the operation of the lock auxiliary 4 It is supposed to

  Although illustration is omitted, as shown in Japanese Patent No. 5106475, the lock arm body 3 is further moved by its own weight as the leg 2 is pivoted to the deployed position, and the engagement concave portion 37 is A lock auxiliary body may be provided to narrow or close the inlet 37a.

  As a matter of course, the present invention is not limited to the embodiments described above, but includes all the embodiments that can achieve the object of the present invention.

DESCRIPTION OF SYMBOLS 1 bottom 2 legs 23a engagement part 3 lock arm body 30 arm free end 33a sliding contact guide part 36 handle bar 37 engagement recessed part 4 lock auxiliary body

Claims (3)

An upper end of the leg rotatably mounted on the bottom on which the bedding is placed so that the leg can be positioned at a folded position in which the lower end of the leg is in contact with or close to the bottom;
The arm base end is rotatably assembled to the bottom at a position different from the leg upper end of the leg, and the arm lower side is a sliding contact guide to an engaging portion provided on the leg, and the arm free end side A lock arm which is foldably supported between the leg and the bottom when the leg is in the folding position, and the engaging portion is provided with an engaging recess which is guided to the sliding guide portion. Equipped with the body,
The engagement of the lock arm body deployed and pivoted while causing the engagement portion to be in sliding contact with the sliding contact portion as the leg is pivoted from the folded position to the deployed position by the lifting operation of the bottom The bed in which the engaging portion enters the recess in the deployed position to maintain the leg in the deployed position,
The arm free end of the lock arm body is provided with a handlebar whose bar central axis is parallel to the pivot axis of the lock arm body,
The leg is rotatably provided in the reference position and the engagement position, and is engaged with the handle bar in the deployed position of the leg to inhibit the upward rotation of the lock arm. Ri name a lock auxiliary body,
The locking aid has a lower open receiving recess for receiving the handle bar when the leg is in the deployed position.
A base rotatably coupled to the leg;
A claw body rotatably combined with the base and having a portion serving as one of left and right inner walls of the receiving recess;
And a biasing means for the claw body,
By the contact of the handle bar with the claw body accompanying the rotation operation of the lock assisting body at the reference position to the engagement position, the claw body is rotated against the bias of the biasing means. A bed adapted to receive a handlebar into the receiving recess . In a state in which the leg body is in a position immediately before the engaging portion reaches the deployed position in contact with the sliding contact portion in the vicinity of the engaging recess, the rotation operation of the lock auxiliary body toward the engaging position The bed according to claim 1, wherein rotation of the claw body against the biasing of the biasing means does not occur. The bed according to claim 1 or 2 , further comprising biasing means for always biasing the lock assisting body toward the reference position.

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