JPH10117851A - Lock device for leg - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb the position deviation of an engage position to a leg within the range of a little backlash between both engaging members while allowing the backlash when operating the engaging members while interlocking them. SOLUTION: In this lock device, a pair of foldable legs 2 for supporting a main body 3 of table are locked or unlocked at using positions or housing positions. In this case, a pair of engaging members provided on the main body 3 of table so as to pull the respective legs 2 turned at the prescribed positions into lock state while being engaged to them are connected while disconnecting a part by a shaft 12 synchronously turnably linked by a linking member 13 as an operating means within the range of allowable fixed backlash between these disconnected sections.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leg lock device suitably applied to a table or the like.

[0002]

2. Description of the Related Art For example, in a conference table used in a hall, legs are rotatably mounted on a table body between a use position and a storage position, and are usually stored compactly so as not to interfere with the legs. There are many things that can be taken out and used when needed. At this time, the lock mechanism for fixing the legs in the use position is configured such that a thin plate-like stay is erected between the vicinity of the upper end of the legs and the table body, and the legs are arranged in the use position. There is known a device in which a stay is stretched between a leg and a table body to fix the leg.

[0003]

However, in this case, since the stays must be individually operated, the work of putting the legs in and out is extremely inefficient.
In addition, there is a problem that the lower limb space is narrowed by installing the stay. Therefore, in order to solve such a problem, the pair of foldable legs supporting the table body may be turned to a predetermined position to be pulled into a locked state, and the unlocking operation may be performed by a common operation lever. That is what is being considered.
This includes a pair of engaging members provided on the table body for respectively pulling each leg rotated to a predetermined position into a locked state, a shaft connecting the two engaging members so as to be synchronously rotatable, a shaft or a shaft. A common operating lever for urging the joint member in the unlocking direction.

However, simply with such a configuration,
Even if there is a slight displacement in the position where the engaging member should be engaged between the pair of legs due to a processing error or an assembly error, the two engaging members are always synchronized through the shaft. In the state where one engaging member is engaged with the leg, the other engaging member may not be able to engage with the leg or the engaging state may be extremely shallow, and the locking function and thus the essential function as a table may be provided. Damage can occur.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention allows some play between the engaging members when the engaging members are operated in conjunction with each other. The displacement of the engagement position with respect to the leg is absorbed in the range of the backlash.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A leg lock device according to the present invention locks or unlocks a pair of foldable legs supporting a supported member at a predetermined position in conjunction with each other. A pair of engaging members respectively engaged with the legs rotated to predetermined positions and pulled into a locked state, a connecting rod partially connected to connect the two engaging members, and a connecting rod A connecting member for connecting between the divided portions so as to be synchronously rotatable while allowing a certain backlash;
Common operating means for urging both engaging members in the unlocking direction through the connecting member.

In such a configuration, when a pair of foldable legs are moved to a predetermined position, each leg is pulled into a locked state by a corresponding engaging member.
At that time, since the engaging member between the pair of legs can behave without being synchronized with each other within a range of play that the connecting member allows, after one of the engaging members first engages with the leg, Even if the other engaging member cannot be engaged with the leg or is in an extremely shallow state, the other engaging member performs the engaging operation independently toward the engaging position from there. be able to. On the other hand, when it is desired to release the locked state of the leg, if the engaging member is retracted from the leg to a position where the operating member is not affected by the rattling allowed by the operating member, the two engaging members can be securely removed. Can be released from the leg to release the locked state of the leg.

Therefore, according to the present invention, an appropriate locking function can be exhibited although the unlocking operation of the paired legs can be performed through the common operating means. As a specific embodiment of the operating means, the connecting member also serves as the operating means, or the operating means is provided at a position where one of the engaging members can be directly rotated and urged. Is mentioned.

As a preferred embodiment of the engagement member,
One that can be disengaged from the leg in both the use position and the storage position is exemplified.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The leg 2 to which the locking device 1 of the present invention is applied is, as shown in FIG.
Are foldably disposed at a position where the pair is supported in pairs.

As shown in FIG. 1, the table main body 3 has a rectangular top plate 4 and a long side edge 4a of the top plate 4.
And a beam 5 fixed to the lower surface of the leg 5. A leg 2 in the shape of a rectangular pipe is pivotally supported at an end of the beam 5 via a bracket 6. The bracket 6
As shown in FIGS. 2 and 3, a pair of side plates 6a hanging down along the edge 4a, a top plate 6b connecting between the front half portions of the side plates 6a, and between the rear end of the top plate 6b and the side plate 6a. The hanging wall 6c is integrally formed with the standing wall 6c.
Is inserted between the side plates 6a of the bracket 6 as shown in FIG. The rotation member 7 is moved from a hole 21 provided in the side plate 6a to the side plate 6a.
A hole 22 is pivotally supported by a pin 8 provided between the two, and a use position P (see FIGS. 1, 4, and 5) orthogonal to the top plate 4 and a storage position Q substantially parallel to the top plate 4 (see FIG. 8). Is rotatable between the two. In this case, at the use position P, one end 7 of the rotating member 7
a is in contact with the upright wall 6c of the bracket 6, and the engaging portion 7b set on the rotating member 7 in the storage position Q is set so as to approach or abut the upright wall 6c of the bracket 6. When the leg 2 is folded at the storage position Q, a gap is formed between the leg 2 and the beam 5 to prevent a hand from being caught.

On the other hand, as shown in FIGS. 1 to 6, the lock device 1 attached to the leg 2
The first and second engaged portions 9 and 10 formed on the first and second engaging portions 9 and 10, and an engaging member 11 that can selectively engage with each of the engaged portions 9 and 10
, A shaft 12 serving as a connecting rod for connecting between the two engaging members 11, and a connecting member 13 also serving as operating means.

The engaging member 11 is pivotally attached by inserting the shaft 12 inserted from the hole 18 provided in the side plate 6a of the bracket 6 into the hole 17 provided in the base end 14a, and the rotating end 14b is free. The rotating arm 14 has an end, and an engaging pin 15 protruding from the rotating end 14b toward the center of the bracket. The rotating arm 14 is supported by the bracket 6. Torsion coil spring 1
6 are elastically biased clockwise.

The torsion coil spring 16 is wound around a shaft 20 inserted through a hole 19 provided in the side plate 6a of the bracket 6, and has one end 16a pivoted to the other end.
The arm 14 is bent at a right angle so as to contact the side surface of the arm 14 so as to elastically urge the arm 14 in the direction of rotation. When the leg 2 is in the use position P shown in FIG. 5, the first engaged portion 9
5, the engagement pin 15 of the rotating arm 14 elastically urged by a torsion coil spring 16 is engaged with the first engaged portion 9. Is set to get. Also, the second engaged portion 1
Numeral 0 denotes a partially arc-shaped groove provided at a position facing the engaging pin 15 of the rotating arm 14 when the leg 2 is at the storage position Q shown in FIG. The engagement pin 15 of the rotating arm 14 is set so as to be able to engage with the second engaged portion 10.

As shown in FIG. 6, the shaft 12 has a proximal end 14a of the pivot arm 14 at one end in the short side direction of the table body 3 and a proximal end 14a of the pivot arm 14 at the other end.
The central portion is divided, and the divided portions are connected by the connecting member 13. The connecting member 13 has a U-shape in a plan view, and has an elongated hole 23 opened at a position corresponding to both ends 13 a thereof,
In the slots 23, the corresponding cut portions 1 of the shaft 12 are provided.
2a is crushed flat and inserted. In this case, slot 2
3 is set to be slightly larger than the dividing portion 12a, and the connecting member 13 connects the dividing portions 12a of the shaft 12 so as to be synchronously rotatable while allowing a certain backlash as shown by an imaginary line in FIG. ing. In addition, this connecting member 1
By gripping and rotating counterclockwise in the figure, the engaging member 11 can be moved in the unlocking direction through the shaft 12, and the connecting member 13 also functions as the operating means of the present invention. .

Next, the handling method of this embodiment will be described. When the pair of foldable legs 2 is erected from a certain intermediate position R toward a use position P as shown in FIG. 7, the engaging pin 15 slides on an arc surface 7c provided on the rotating member 7. When the leg 2 reaches the use position P as shown in FIG. 5, one end 7a of the rotating member 7 comes into contact with the upright wall 6c, and at the same time, the engaging pin 15 is urged by the torsion coil spring 16. The leg 2 is pulled into the locked state by engaging with the first engaged portion 9. In this case, the present embodiment employs the engagement member 1 between the pair of legs 2.
1 is configured to be able to behave without synchronizing with each other within the range of play that the connecting member 13 allows, so that one engaging member 11 is engaged with the first engaged portion 9 first. Thereafter, even if the other engaging member 11 cannot be engaged with the first engaged portion 9 of the leg 2 as shown in FIG. The other engaging member 11
Can be further engaged independently toward the engagement position, so that the torsion coil spring 16 moves to a position where the first engaged portion 9 is engaged, and the leg 2 is properly locked. Drawn into.

On the other hand, when it is desired to release the locked state of the leg 2, by operating the connecting member 13 which also serves as an operating means, as shown by an imaginary line in FIG. If the engaging member 11 is retracted from the leg 2 to a position where it is not performed, both the engaging members 11 can be reliably removed from the leg and the locked state of the leg 2 can be released. Next, when the leg 2 is moved toward the storage position Q, the pin 1
5 slides on an arc surface 7c provided on the rotating member 7, and when the leg 2 reaches the storage position Q, the engaging pin 15 is urged by the torsion coil spring 16 as shown in FIG. Then, the engaging portion 7b of the rotating member 7 comes into contact with or close to the upright wall 6c, and the leg 2 is pulled into the locked state. Also in this case, after one engaging member 11 first engages with the second engaged portion 10, the other engaging member 11 engages with the second engaged portion 10 of the leg 2. Even if the engagement state is not obtained or the engagement state is extremely shallow, the other engagement member 11 can be further engaged alone toward the engagement position from the engagement state. The leg 2 is moved to a position where the leg 2 is engaged with the engaged portion 10, and the leg 2 is pulled into an appropriate locked state.

Further, when it is desired to release the locked state of the leg 2, the engaging member 11 is operated by operating the connecting member 13 which also serves as the operating means, so that the engaging member 11 is moved to a position which is not affected by the backlash permitted by the connecting member 13. , The two engaging members 11 can be securely removed from the legs 2 and the locked state of the legs 2 can be released. As described above, the lock device 1 according to the present embodiment causes the connection member 13 to generate some backlash between the engagement members 11 when the engagement members 11 are operated in conjunction with each other.
And it is configured to be able to absorb the displacement when the engaging member 11 is engaged with the leg 2 within the range of the backlash. An appropriate locking function can be exerted even when there is a slight misalignment in the position where the engaging member 11 is to be engaged between the legs 2. In particular, in this embodiment, the connecting member 1 which also serves as an operating means performs the unlocking operation of the pair of legs 2.
3, so that an appropriate locking function can be ensured with a smaller number of components. In addition, with such a configuration, the stay conventionally provided between the lower part of the top plate 4 and the leg 2 can be eliminated, and the lower limb space below the top plate 4 can be widely used, and the stay type can be used. It is possible to prevent the stay from being caught by the stay due to a problem with the stay. In addition, in the lock device 1 of the present embodiment, when the leg 2 is folded to the storage position Q, a certain gap is formed between the beam 5 provided on the lower surface of the top plate 4 and the leg 2. Since the setting is made, the user's hand can be prevented from being caught at the time of folding, and the safety of the user is ensured. Further, an engagement pin 15 protruding from the engagement member 11 and an upright wall 6c of the bracket 6 are engaged with the rotating member 7 to form a lock mechanism at both the storage position Q and the use position P. Secure locking is possible with a simple configuration.

The specific configuration of each section is not limited to the illustrated embodiment. For example, an arm portion may be provided as a control means at a position where one of the engagement members 11 can be directly rotated and urged. That is, if a thin plate-like arm is connected to the end of the shaft 12 pivotally attached to the side surface 6a of one of the brackets 6 and the arm is operated, good operation is possible. Become.

Other configurations can be variously modified without departing from the spirit of the present invention.

[0021]

The present invention is embodied in the form described above and has the following effects. That is, the leg lock device of the present invention is provided with a pair of foldable legs that support the supported body and lock or unlock them in conjunction with each other at a predetermined position. A pair of engaging members that respectively engage with the respective legs and pull into a locked state, a connecting rod that is partially connected to connect the two engaging members, and a fixed play between the divided portions of the connecting rod. It comprises a connecting member that is connected so as to be synchronously rotatable in a state where attachment is allowed, and common operating means that urges both engaging members in the unlocking direction through the connecting member.

With such a structure, the connecting member allows a slight play between the legs when the legs are operated in conjunction with each other, and the engaging member engages with the legs within the range of the play. Since the displacement at the time of joining can be absorbed, there is a slight displacement at a position where the engaging member should be engaged between the pair of legs due to a processing error or an assembly error. Can also exert an appropriate locking function.
Moreover, it is possible to prevent the stay from being caught by the stay due to the stay, which has been a problem in the conventional stay type, and to widely use the space of the lower limb below the top plate.

In particular, if the connecting member also serves as the operating means, the number of parts can be reduced, a proper lock function can be ensured with a simple structure, and the operating means connects one of the engaging members. If it is provided at a position where it can be directly urged to rotate, better operation is possible. In addition, if the engagement member is configured to be able to be disengaged from the leg in both the use position and the storage position, it is not necessary to separately configure a lock mechanism in each position. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention.

FIG. 2 is a perspective view showing a main part of the embodiment.

FIG. 3 is an exploded perspective view of the same.

FIG. 4 is a partial front view of the same.

FIG. 5 is an explanatory view of the operation.

FIG. 6 is a perspective view showing a main part of the embodiment.

FIG. 7 is an explanatory view of the operation.

FIG. 8 is an explanatory view of the operation.

FIG. 9 is an explanatory view of the operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Locking device 2 ... Leg 3 ... Supported body (table main body) 11 ... Engaging member 12 ... Connecting rod (shaft) 13 ... Operating means (connecting member) P ... Usage position Q ... Storage position

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akira Asakura 6-1-1, Oimazato-minami, Higashi-Nari-ku, Osaka Inside Kokuyo Co., Ltd. (72) Katsuya Matsuzaki 6-1-1, Oimazato-minami, Higashi-Nari-ku, Osaka No. 1 KOKUYO Co., Ltd. (72) Inventor Masahiro Kurita 1468 Kurihara, Tarui-cho, Fuwa-gun, Gifu Prefecture

Claims (4)

[Claims] 1. A pair of foldable legs that support a supported body are locked or unlocked at a predetermined position in conjunction with each other, and each of the legs is provided on the supported body and rotated to a predetermined position. A pair of engaging members that respectively engage with each other to be pulled into the locked state, a connecting rod that is partially connected to connect the two engaging members, and allow a certain play between the divided portions of the connecting rod. A locking device for a leg, comprising: a connecting member that is connected in a synchronized manner so as to be rotatable in a locked state; 2. The leg lock device according to claim 1, wherein the connecting member also serves as operating means. 3. The operation means according to claim 1, wherein said operation means is provided at a position where said one engagement member can be directly rotated and urged.
The locking device as described. 4. The leg locking device according to claim 1, wherein the engaging member is configured to be able to be disengaged from the leg in both the use position and the storage position.