JPH11206515A - Lock structure for middle folding type structural body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lock respective attitudes when a middle folding type structural body is developed and folded by fixing a lock operation member provided with a lock receive piece and a lock pin having a pair of projecting shafts capable of locking in a lever part and a pin receive part for folding or a pin receive part for development. SOLUTION: A frame lock means for locking folding attitude and developing attitude of a bed is provided. This consists of a lock receive piece 50 fixed on a horizontal frame part lea of a base part 4 and a lock operation member constrained on a central 4g part 21. The center of a pin receive part for folding 51 and the center of a pin receive part for development 52 are arranged on the lock receive piece 50. The lock operation member consists of a lever part 41 and a lock pin 42 and is energized in the locking direction at all times by a spring 44 fitted in a pivotal shaft P10. The lock pin 42 is provided with an interval in a shaft part at a tip so that it is matched with the pin receive part for folding 51 and the pin receive part for development 52 of a pair of right and left lock receive pieces 50.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock structure for holding a posture of a half-fold type structure when the structure is folded or unfolded.

[0002]

2. Description of the Related Art Hitherto, various configurations have been proposed as a structure for locking a folding posture in a foldable bed or a circle bed. For example, the present applicant has already proposed a structure in which four opposite corners are provided. A structure has been proposed in which a device is provided on the outer leg portion for abutting the leg portion at the time of folding and locking at the abutting point. However, with this structure, the deployment posture cannot be locked.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a main problem thereof is that the respective positions can be locked at the time of unfolding and folding of a half-folded structure. It is to provide a new lock structure.

[0004]

According to the present invention, in order to solve the above-mentioned problems, according to the first aspect of the present invention, there is provided a pair of left and right central pillars arranged at the center, A bracket extending in the direction, a pair of left and right base portions that are pivotally attached to the base end and can be folded or unfolded, and outer leg portions respectively provided at left and right corners on the outer end side of the base portion. In the lock structure of a half-fold type structure, the outer legs facing the front and rear are approached to the center side, and the base portion is folded so that the center pedestal rises and is tilted and folded in a middle folded shape.
The lock structure includes a lock receiving piece fixedly provided on the opposite end side of the pair of left and right base portions, and a space between the folding or unfolding angle with the pivot point between the bracket and the base portion as a fulcrum on the lock receiving piece. A folding pin receiving portion and a deploying pin receiving portion, a lever portion pivotally attached to a central pillar, and the folding pin receiving portion or the deploying pin receiving portion provided on the lever portion. A lock pin having a pair of projecting shafts that can be locked to the part,
There is provided a technical means that the lock pin includes a grip portion for pulling the lock pin in the lock release direction and a lock operation member urged in the lock direction.

According to the second aspect of the present invention, the bracket is provided with a pair of guide holes into which the projecting shafts of the lock pins are inserted, and a gap is formed between the bracket and the bracket so that the lock receiving piece can tilt. Further, a technical means is provided in which a support surface portion for supporting the opposed inner end side of the base portion at the time of deployment through the gap in a horizontal posture is fixed to the bracket.

Further, according to the third aspect of the present invention, the folding pin receiving portion and the deploying pin receiving portion of the lock receiving piece are engaged with a hole in which a projecting shaft of the lock pin can be fitted or a projecting shaft of the hole. Technical means that it is formed in the shape of a notched groove having only the edge of the portion to be formed.

Further, in the invention of claim 4, the lock operating member projects from the central pillar, and a substantially U-shaped handle portion is provided on the central pillar so as to cover the lock operating member. Is taking the technical steps of:

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a lock structure when applied to a circle bed as a half-fold structure of the present invention will be described below with reference to the drawings. First, as shown in FIG. 1 and FIG. 2, a circle bed 1 shown as an example has a center support portion 2 standing in the center, corner support portions 3 arranged at four corners, a center support portion 2 and a corner support portion 3. A base portion 4 composed of a pair of base frames with four corners pivotally mounted inside, a front and rear circle surface portion 5 formed between outer circle portions 31 of the corner support portion 3 facing left and right, and a corner support portion The left and right circle surface portions 6 are disposed between the circle outer pillar portion 31 of the third and the center column portion 21 of the center support portion 2 on the same surface side.

The center support portion 2 has left and right circle central column portions 21 formed at an upper portion, and a horizontal column portion 22 is laid over the lower portion of the circle central column portion 21 to form a horizontal inverted U-shape. At the same time, a pair of central leg portions 23 is vertically provided on the lower surface of the horizontal column portion 22 from the end toward the inside. Also,
Below the circle center column portion 21, a handle portion H formed of a rod frame having a corner portion curved and bent in a substantially U-shape is projected outward.

[0010] An intermediate partition 25 is formed between the left and right circle central pillars 21. That is, the middle partitioning surface portion 25 is located above the horizontal column portion 22 and the upper frame portion 26
The lower frame 27 is laid at a lower position slightly above the base 4 at a lower level and lower than the mat M on the base 4. Further, between the upper frame portion 26 and the lower frame portion 27, vertical frames 28 are erected at equal intervals in the width direction to form a partition surface that bisects the inside of the bed.

Next, the corner support portions 3 are arranged at four corners, and a circle outer column portion 31 is formed at an upper portion, and an outer leg portion 32 is formed at a lower portion. At the lower end of the outer leg portion 32, an outer leg stand 33 extending parallel to the base portion 4 and extending toward the central leg portion 23 is fixedly provided. Installed.

As shown in FIGS. 3 to 6, the center support portion 2 is provided at an intermediate position of the center column portion 21 of the circle.
A center bracket 7 for pivotally connecting the inner end side of the base portion 4 is fixedly provided. The bracket 7 is integrally attached to the inner surface of the circle center column 21 at a position between the below-described circle lower frame 67 and the base 4 in the width direction.

The bracket 7 extends left and right and rises upward at both ends in a substantially semicircular shape, and has an arm piece 71 having a pair of projecting pieces 72 on which a pivot point P1 described later is formed.
And a support surface portion 73 which is parallel and spaced apart from the arm piece 71 via a gap and extends inward and horizontally between the protruding pieces 72, 72 to support the inner end side of the base portion 4 when the base portion 4 is deployed.
Are formed.

The support surface 73 is supported by leg pieces 75 projecting perpendicularly to the inner wall of the arm piece 71, and a lock piece 50 described later can be tilted between the arm piece 71 and the arm piece 71. A gap S is formed (see FIG. 3). The arm piece 71 has a pair of left and right lock guide holes 76 near the center.

On the other hand, on the upper part of the circle center column 21,
A bracket 7 'for fixing the left and right circle surfaces 6, 6 to each other is fixedly provided. The bracket 7 'has an arm piece integrally fixed to the inside of the circle center pillar portion 21 and extending horizontally left and right, and each left and right end thereof has a pivot point P4 of a circle upper frame portion 66 described later. It has become.

Further, a corner bracket 9 is fixedly provided at an intermediate position of the circle outer pillar portion 31 of the corner support portion 3 in correspondence with the center bracket 7. Similarly, a corner bracket 9 'is fixedly mounted on the upper portion of the circle outer column 31 at the same height as the bracket 7'. The brackets 9 and 9 ′ are formed of angled plates having the same shape and are fixed to the outer column 31. The arm piece of the upper bracket 9 'is arranged so as to be flush with the arm pieces of the center brackets 7, 7'.

The base portion 4 is formed of a pair of substantially rectangular frames divided into two parts, and is pivotally attached to the lower bracket 9 and the center bracket 7 at both ends in the left-right direction. A mat M can be placed on the base 4. The mat M is not particularly limited, and urethane mats, tatami mats, wooden mats, and other known mats used as floor materials for beds can be used.

As described above, the protruding pieces 72 of the central bracket 7 are pivotally connected to the base ends of the horizontal frame portions 4a extending left and right of the base portion 4 by the pins, respectively.
At the time of unfolding, a portion of the base portion 4 protruding toward the center from the pivoted position is placed on the support surface portion 73 of the bracket 7 and is held horizontally. Further, the outer end of the base portion 4 is pivotally connected to the lower bracket 9 for corners by a pin, respectively.
P2 is set to be the same height. Then, at the time of unfolding, the base end sides of the horizontal frame portions 4a, 4a of the base portion 4 hold the support surface portion 73 of the bracket with the intermediate partition surface portion 25 therebetween.
And the pair of base portions 4 are held on the same horizontal plane.

In the present embodiment, the center support portion 2 having the center leg portion 23 is used as a holding means when the bed is unfolded. An end of a spring body 10 composed of a cable is hooked or pivoted, and the center of the spring body 10 is centered on left and right central legs 23.
And the inner pillar portion of the horizontal pillar portion 22, and is urged to maintain the center leg portion 23 always vertical.

Next, in the circle portion, front and rear circle surface portions 5 are attached between the left and right opposite circle outer pillar portions 31, 31. The front and rear circle surface portions 5 are integrally formed with a rectangular frame portion and equally spaced fence portions so as to be able to move up and down.

Next, two left and right circle surface portions 6 are respectively mounted between the circle outer column portion 31 and the circle center column portion 21 on the same surface side. The left and right circle surface portions 6 pivotally connect P4 and P5 to the upper circle frame portion 66 via brackets 7 'and 9' at the upper stage of the outer circle column portion 31 and the center circle column portion 21, and the lower circle frame portion to the lower stage. 67 is pivotally connected P1 via brackets 7 and 9;
P2. A large number of vertical frame portions 68 are arranged at predetermined regular intervals between pivot points P4 and P5 and P1 and P2 of the circle upper frame portion 66 and the circle lower frame portion 67, and the upper and lower ends are pivoted respectively. The attachments P8 and P9 constitute a parallel link (see FIG. 3).

The circle bed having the above structure is provided with a frame locking means for locking the folding posture and the unfolding posture of the bed. This frame lock means
Lock receiving piece 50 fixed to horizontal frame portion 4a of base portion 4
And a lock operation member 40 restrained by the center leg 21. That is, left and right symmetrical lock receiving pieces 50, 50 are attached to the base portions 4, 4, respectively, on the inward end sides of the horizontal frame portions 4a extending in the longitudinal direction of the pair of base portions 4.

The lock receiving piece 50 is a substantially trapezoidal plate which is downward when unfolded, has an arcuate side opposite to the side when folded, and has a curved corner. Then, the lock receiving piece 50 is tilted in conjunction with the base portion 4 which is tilted at the time of folding or unfolding about the pivotally mounted pins P1 and P1 as a center point, and the folding angle (in the present embodiment, the folding angle around the pin P1). The folding pin receiving portion 51 having holes at intervals of 82 degrees 30 minutes as an angle between the horizontal unfolding posture in FIG. 1 and the folding posture in which the vertical frame overlaps and the vertical frame slightly tilts with respect to the vertical.
And the center of the deployment pin receiving portion 52 are arranged.

On the other hand, in the case of the illustrated example, the lock operation member 40 is provided in a portion of the central column 21 surrounded by the handle portion H, and a bracket 41a pivotally attached to the central column 21 by a pivot P10. Socket-like lever part 4 having
1 and a U-shaped lock pin 42 fixed to the end of the lever portion 41, and is always urged in the locking direction by a spring 44 fitted on the pivot P10.

The distance between the shaft portions at the distal ends of the lock pins 42 is set so as to match the folding pin receiving portions 51, 51 and the deploying pin receiving portions 52, 52 of the pair of left and right lock receiving pieces 50. I have. When a U-shaped rod is used as in the illustrated example, the arc-shaped connecting portion at the rear end can be used as a grip portion 45 when an operator pulls out the shaft portion to release the lock.

The lever 41 or the lock pin 42
The present invention is not limited to the above-described embodiment. As another example, as shown in FIG. 3, a pair of shaft portions of the lock pin 42 are horizontal, the base ends thereof are bent, and the lever is extended downward. A part 41 is formed integrally with a substantially U-shaped rod, and the rear part is closed with a plate to form a grip part 45. A bracket 41a consisting of a pair of left and right projecting pieces is provided at an intermediate position of the lock pin 42. May be provided.

Also in this case, the lock pin 42 is always urged in the lock direction by inserting the spring 44 into the pivot P10. In addition, the lock operation member is not limited to each of the above-described embodiments. In short, the lock pin including the pair of shaft portions is formed by the folding pin receiving portions 51 and 51 and the deployment pin receiving portion 52 of the lock receiving piece 50. , 52 so long as it can be locked and unlocked while being held in and out of the vehicle.

Further, the folding pin receiving portion 51 and the unfolding pin receiving portion 52 provided on the lock receiving piece 50 have notched groove shapes as shown in FIG. May be used. That is, in the present embodiment, the engagement between the pair of shaft portions of the lock pin 42 and the pin receiving portion is below the lock receiving piece 50 in the horizontal posture when the deployed pin receiving portion 52 is engaged. Since the edge portion is engaged with the shaft portion and latched, there is no need to have another edge portion in the case of a circular hole, so that the notch has a notched groove shape as shown in the illustrated example.

Similarly, when the folding pin receiving portion 51 is folded and engaged, the lower edge of the lock receiving piece 50 in the upright posture is engaged with the shaft portion and latched. In this case, the other edges may not be provided and have a cutout shape as shown in the illustrated example. The folding pin receiving portion 51 and the unfolding pin receiving portion 52 are also provided with the pins P1 and P2 similarly to the above embodiment.
Are arranged on the lock receiving piece 50 at an interval of 82 ° 30 ′ with respect to the center point.

The lock pin 42 may be a pair of separate pins, and a pair of pins are fixedly mounted on a lever piece supported by a bracket, and a grip for releasing operation is also provided behind the lever piece. Is also good. Lock pin 4
2 may be provided with a stopper for regulating the pivot angle at the time of unlocking.

Since the above configuration is adopted, FIGS.
When the base portions 4 and 4 are in the unfolded posture, the lock receiving pieces 50 and 50 also face each other in a horizontal posture. At this time, a pair of lock guide holes 76, 76 of the arm piece 71 are respectively engaged with the lock receiving pieces 50, 5 provided on the left and right base portions 4.
0, and the shaft portions of the lock pins 42 project into the receiving portions 52, 52, respectively.
Is locked in a horizontal deployment position. Therefore, a finger is hung on the grip portion 45 of the lock pin 42 and pulled downward, and the shaft portion is pulled out from the deployment pin receiving portions 52, 52 to release the lock.

Next, when the base portions 4, 4 tilt in the rising direction, the lock piece 50 tilts around the pins P1, P1, and the tip of the unlocked pin slides along the edge of the lock piece 50. (See FIGS. 7 and 8). Then, when the base portions 4, 4 are in the folded posture in which they stand, the edges of the lock receiving pieces 50, 50 provided in the respective base portions enter the gap S between the arm piece 71 and the support surface portion 73, and stand up posture. Become.

At this time, at the lower end of the corner of the partition surface 25,
A recess K such as a notch or a taper is provided to escape so that the lock receiving pieces 50 do not abut. As a result, the pair of lock guide holes 76 of the arm piece 71 are connected to the folding pin receiving portions 51 of the lock receiving pieces 50, 50, respectively.
The shaft portions at the ends of the lock pins 42 are respectively aligned with the receiving portions 51 to lock the base portions 4, 4 in the upright folded posture (see FIG. 9).

When returning to the deployed position again, as described above, a finger is hooked on the finger hook 45 of the lock pin 42 and pulled out, and the shaft is removed from the folding pin receiving portions 51, 51 to release the lock. Then, contrary to the above, the base portions 4, 4 are tilted in the horizontal direction and returned to the horizontal position, and at this position, the lock pin 42 protrudes into the deployment pin receiving portions 52, 52 aligned by the urging force,
The deployed posture can be locked as shown in FIG.

A method of using the above-structured folding bed will also be described. First, when the bed is folded from the expanded state of the bed by releasing the lock operation member 40, the center support portion 2 is pulled up by grasping the handle portion H, and the outer leg portions are set so that the center of the left and right base portions 4 is upward. The caster 34 fixed to the lower end of the roller 32 is folded so as to roll on the floor toward the center. At this time, it can be folded lightly by the urging force of the spring body 10.

The above-mentioned spring body 10 releases tension by approaching the horizontal frame portion 4a and the horizontal column portion 22, and releases the restraint to the central leg portion 23. Further, the outer column portion 31 maintains a vertical posture regardless of the tilt of the base portion 4, while the outer column portion 31 has a vertical position.
1 rises in conjunction with the central leg 23.

When the base portion 4 is displaced to the folding inclined position shown in FIG. 2, the front and rear opposing corner support portions 3 approach each other while maintaining the vertical posture, and the front and rear opposing outer leg bases 33 and 33 come into contact with each other. Agree. And it locks in the folded state using the lock means 40 as mentioned above. at the same time,
The circle upper frame portion 66 and the lower frame portion 67 are tilted to a position where the vertical frame portions 68 are in contact with each other without any gap, and are displaced in opposite directions and moved in parallel in the approaching direction and folded (see FIG. 2).

When the base portion 4 is to be unfolded, the lock operation member 40 is released as described above, and conversely, when the handle portion H is pulled down and the corner support portion 3 is pulled out, the outer leg portions are pulled out. A caster 34 fixed to the lower end of the roller 32 rolls outward on the floor. At this time, the above-mentioned spring body 10 gradually increases the tension by separating the horizontal frame portion 4a and the horizontal column portion 22, thereby restraining the central leg portion 23 in an upright state.
At the same time, the circle upper frame 66 and the lower frame 67 are separated from each other and displaced up and down so that the vertical frame 68 returns to the vertical position.

The present invention is not limited to the above embodiment. For example, the application is not limited to a bed, but can be applied to a folding structure such as a stage or a table. Further, the means for locking the base portion in the folded posture or the deployed posture is not limited to the above embodiment, and a known lock structure such as a structure using a hook and a pin can be used. Are also included in the technical scope of the present invention. In addition, the present invention can be variously modified without departing from the gist thereof.

[0040]

As described above in detail, in the lock structure for a half-folded structure according to the present invention, both the folded posture and the unfolded posture are set when the half-folded structure is folded and unfolded. It is extremely secure because it can be locked. Further, since the lock operation member is provided on the center pillar, it does not become an obstacle, and if the cover is covered with the handle portion, the safety is further enhanced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a deployed state of a half-fold type circle bed according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the folded state.

FIG. 3 is an exploded perspective view of a lock structure, and also shows different embodiments of a lock operation member.

FIG. 4 is a side view showing a locked state in a deployed posture.

FIG. 5 is a sectional view seen from the plane of FIG. 4;

FIG. 6 is a longitudinal sectional view of FIG.

FIG. 7 is a side view showing a halfway attitude during folding.

8 is a longitudinal sectional view of FIG.

FIG. 9 is a side view showing a locked state in a folded posture.

FIG. 10 is a perspective view showing another embodiment of the pin receiving portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Circle bed 2 Center support part 3 Corner support part 4 Base part 4a Horizontal frame part 5 Front and rear circle surface parts 6 Left and right circle surface parts 21 Center pillar part 40 Lock operation member 41 Lever part 41a Bracket 42 Lock pin 44 Spring 45 Grip part 50 Lock receiving piece 51 Folding pin receiving part 52 Deployment pin receiving part H Handle part S Gap K Notch or taper

Claims (4)

[Claims] 1. A pair of left and right central pillars arranged at the center, a bracket fixed to an upper part of the central pillar and extending in the front-rear direction, and a base end pivotally attached to the bracket to be folded or folded. A pair of left and right bases that can be deployed and outer legs provided at the left and right corners on the outer end side of the base, respectively. A lock structure of a half-folded structure that is inclined in such a manner that the center pillar rises and is folded in a half-folded manner, wherein the lock structure is fixed to the opposite end sides of the pair of left and right base portions. A receiving piece, a folding pin receiving section and a deploying pin receiving section which are arranged on the lock receiving piece at intervals of a folding or deploying angle with a pivot point of the bracket and the base as a fulcrum; A lever portion pivotally mounted on the lever portion, and the folding pin provided on the lever portion. A lock operating member urged in the lock direction having a lock pin having a pair of projecting shafts that can be locked to the receiving portion or the deployment pin receiving portion, and a grip portion for pulling the lock pin in the unlocking direction. A lock structure for a half-folded structure, comprising: 2. A bracket is provided with a pair of guide holes into which a protruding shaft of a lock pin is inserted, and a gap is formed between the bracket and the bracket so that the lock receiving piece can be tilted. 2. The lock structure for a half-fold structure according to claim 1, wherein a support surface portion for supporting the opposed inner end side of the base portion in a horizontal posture is fixed to the bracket. 3. A folding pin receiving portion and a deploying pin receiving portion of a lock receiving piece are provided only with a hole in which a protruding shaft of a lock pin can be fitted or an edge portion of a portion engaging with the protruding shaft of the hole. The lock structure for a center-folded structure according to claim 1, wherein the lock structure has a notched groove shape. 4. The lock operation member according to claim 1, wherein the lock operation member protrudes from the center pillar, and a substantially U-shaped handle portion is provided on the center pillar so as to cover the lock operation member. Item 4. A lock structure for a half-fold structure according to item 1, 2 or 3.