JP2000102432A - Lock device for movable furniture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily lock a wagon regardless of the kinds of casters. SOLUTION: A base is provided with an interlocking member 12 which is laterally moved by the turning manipulation of a manipulation lever. Diagonally downwardly facing slopes 20 are formed at both ends thereof. A guide box 19 disposed at the base is freely vertically provided with rods 22. Guide pins 31 projectingly disposed at the rods 22 are disposed to face the slopes 20 of the interlocking member 12. When the guide pins 31 projectingly sliding the interlocking member 12, stoppers 25 fitted from below to the rods 22 brace to a floor surface and the wagon is locked. Then, the rods can make downward motion by overcoming the springs built therein in the state that the stoppers 25 come into contact with the floor surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device for holding a mobile furniture provided with casters, such as a wagon, in a stopped state.

[0002]

2. Description of the Related Art Locking devices for mobile furniture such as wagons are disclosed in, for example,
As disclosed in Japanese Unexamined Patent Publication No. 4-200407 and Japanese Unexamined Patent Publication No. Hei 5-192228, most have a structure in which wheels of casters are locked so as not to rotate. However, since there are various types and sizes of casters, in the structure for locking the casters, it is necessary to manufacture various types of locking devices according to the type of each caster, which increases the manufacturing cost. There is a disadvantage that. In the case of a caster having a ball-shaped roller, it is extremely difficult to lock.

[0003] On the other hand, Japanese Utility Model Laid-Open No. 4-123136 discloses that in a storage furniture, a caster is provided so as to be able to move up and down by a lever operation, and the storage furniture can be moved by pushing down the caster below the lower surface of the storage furniture. It is described that the storage furniture is immovably held by placing the caster above the lower surface of the storage furniture. However, this structure has a drawback that a large force is required for the operation because the storage furniture must be lifted and lowered one by one.

It is an object of the present invention to provide a locking device that does not have these disadvantages.

[0005]

SUMMARY OF THE INVENTION A lock device according to the present invention comprises:
A stopper for holding furniture immovably by striking the floor, and contacting the stopper with the floor.
It is characterized in that it has an operating tool for reciprocating movement. In this case, as described in claim 2, it is preferable that a spring means is interposed between the operating tool and the stopper so that the stopper projects against the floor surface against the elasticity of the spring means.

[0006]

[Operation and Effect] The lock device of the present invention has a structure completely unrelated to casters, so that it can be applied to furniture having casters of any kind and size, and as a result, the structure is common. And it can be manufactured at low cost. In addition, furniture is locked by bringing the stopper into contact with the floor surface, that is,
Since only the stopper is applied to or separated from the floor, the locking / unlocking operation can be performed with a light force.

Further, according to the present invention, since the stopper is kept pressed against the floor by the spring means, the locking function is ensured, and the stopper comes into contact with the floor. Even so, since the operating tool can be moved to the lock position while deforming the spring means, the height error between the stopper and the floor can be absorbed and locked securely, and the lock can be locked with a light force. The operation can be more reliably performed.

[0008]

Next, embodiments of the present invention will be described with reference to the drawings. << First Embodiment >> FIGS. 1 to 6 show a first embodiment. FIG. 1 is a perspective view of the wagon 1. The wagon 1 includes an open-type main body 2 and a base 4 attached to a lower surface of the main body 2.

At the four corners of the base 4, wheels-type casters 5
Is provided. In addition, the main body 2 is not limited to the open type, and various forms such as a cabinet type and a drawer type can be adopted. The lock device of the present invention is provided on the base 4 in the embodiment, and the details thereof will be described with reference to FIGS.

FIG. 2 is a plan view of the base 4, and FIG.
IIIA-IIIA sectional view, FIG. 3 (B) is a BB view of FIG. 3 (A), FIG.
(C) is a CC view of FIG. 3 (A), FIG. 4 (A) is a plan view of a main part, and FIG. 4 (B)
4A is a BB view of FIG. 4A, FIG. 4C is a CC view of FIG.
4A is a sectional view taken along the line VV in FIG. 4A, and FIG. 6 is a view showing a locked state. The base 4 includes a main frame 6 having a left-right length and a rectangular shape in a plan view, and a center frame 7 extending left and right so as to partition the inside of the main frame 6. Figure
As shown in FIG. 3A, the main frame 6 is made of a steel material having a U-shaped cross section, and the center frame 7 is formed in a gutter shape with an upward opening. The center frame 7 is fixed on the upper part of the main frame 6.

As shown in FIGS. 2 and 3, the upper surface of the base 4 is covered with a cover plate 8. Further, a pair of right and left stay members 9 arranged in a C shape in plan view are fixed to the rear corner of the main frame 6. The stay member 9 is fixed to the lower surface of the main frame 6. The locking device is
An operation lever 10 extending substantially in the front-rear direction, a link 11 connected to the rear end of the operation lever 10,
And an interlocking member 12 that extends long in the left-right direction passing below the connection point with the link 11.

The operation lever 10 is an example of the operation tool described in the claims, and is disposed on the lower surface of the base 4. Then, as shown in FIG. 2 and FIGS.
A portion near the rear end is attached to a first bracket 13 having an upward open U-shape fixed to the cover plate 8 with a first bolt 14. The rear end of the link 11 is rotatably attached to a second bracket 15 fixed to the rear edge of the main frame 6 with a pin 16.
Of the interlocking member 12 with the front end of the
To be rotatable.

Therefore, when the operation lever 10 is rotated about the first bolt 14, the interlocking member 12 moves left and right. The operation lever 10 slightly protrudes from the front surface of the main frame 6, and can be rotated by hand or foot. A support plate 18 for supporting the front part of the operation lever 10 is fixed to the lower surface of the front part of the main frame 6. The support plate 18 is an operation lever
It also plays a role in regulating the 10 rotation ranges.

Although the interlocking member 12 can be moved right and left only by the operation lever 10, the provision of the link 11 as in the embodiment has an advantage that the left and right movement of the interlocking member 12 can be smoothly performed without being twisted. The interlocking member 12 has an inverted L-shaped cross section around the center and a vertical outer left and right. Then, as shown in FIG. 4, the left and right ends of the interlocking member 12 are inserted into the guide box 19 by cutting out the front ends of the side plates 4 a of the guide box 19 fixed to the lower surface of the stay member 9. . Therefore, the interlocking member 12 can slide left and right with both left and right ends overlapping the inner surface of the front plate 4b of the guide box 19.

As shown in FIG. 4 (C), an obliquely downwardly inclined surface 20 which is inclined at the same angle and in the same direction is formed at both left and right end portions of the interlocking member 12. The upper end of the inclined surface 20 is a narrow upper flat surface
A vertically long rod 22 is arranged at the rear of the upper flat surface 21 of the guide box 19. As shown in FIG. 5, a head 23 is screwed into the rod 22 from above, and the rod 22 is pushed upward by a first spring 24 via the head 23.

The lower portion of the rod 22 has a small diameter and is formed in a cylindrical shape, and a stopper 25 is fitted into the hollow portion of the rod 22 from below. The stopper 25 is composed of upper and lower members 26 and 27 integrated by screwing each other, and is urged downward by a second spring 28 built in the hollow portion of the rod 22. The second spring 28 corresponds to a spring means described in the claims.

The lower member of the stopper 25 is formed to have a smaller diameter than the upper member 26, and the lid 29 fitted in this is
Screwed into the small diameter part. Lid 29 is stopper 25
It plays a role of retaining. The stopper 25 is composed of the upper and lower members 26 and 27 so that the stopper 25 cannot be removed by the lid 29. Lower member of stopper 25
A flange 27a is formed at the lower end of the cap 27, and a cap 30 made of a material having a large friction coefficient such as rubber is fitted into the cap 27 so that it cannot be pulled out. The cap 30 has a larger diameter than the rod 22.

Further, a guide pin (screw) 31 is attached to the rod 22 from the front by a suitable means such as screwing.
Guide pins 31 are provided on the front plate 19b and the lower plate of the guide box 19.
A long slot hole 32 is formed to allow the lower part to move downward. In the unlocked state, the guide pin 31 of the rod 22 contacts the upper flat surface 21 of the interlocking member 12, and the rod 22 is held immovable upward.

When the operating lever 10 is rotated in the direction shown by the dashed line in FIG. 2, the interlocking member 12 moves as shown in FIG. Then, since the guide pin 31 of the rod 22 is pushed down by the left and right inclined surface 20 of the interlocking member 12, the rod 22 moves downward against the first spring 24, and the stopper 25 is
It hits floor F via 30. In this case, when the operation lever 10 is fully rotated, the guide pin 31 hits the lower surface of the interlocking member 12 as shown in FIGS. Since the stopper 25 and the rod 22 can move relative to each other, the rod 22 can be pushed down while the cap 30 is in contact with the floor surface F. Therefore, the operation lever 10 can be turned to the locked position with a light force. Can be. In addition, since the cap 30 is stuck to the floor F by the spring force of the second spring 28, the lock of the wagon 1 is ensured.

As shown in FIG. 5, the distance between the cap 30 and the floor F in the unlocked state is L1, the stopper 25
Assuming that the moving stroke of L is L2 and the descending stroke of the guide pin 31 is L3, the relationship of L1 + L2> L3 should be set. Therefore, when the operation lever 10 is turned to the lock position, the base 4 and the main body 2 are pushed up, which is not good).

Second Embodiment FIGS. 7 to 10 show a second embodiment. 1 is a perspective view of the base 4 when the base 4 is turned upside down, FIG. 8 is a bottom view of the base 4, and FIG.
10 is a side sectional view, FIG. 10A is a sectional view taken along the line XX in FIG.
(B) is a BB sectional view of (A). In this embodiment, the caster 5 has a spherical roller (the caster 5 has a roller receiver, but is not shown in the drawing).

The base 4 of the present embodiment has substantially the same structure as that of the first embodiment, and includes a main frame 6, a center frame 7, and a cover plate 8. In the present embodiment, a bar or pipe having elasticity is used as a main material, and a plan view U
An L-shaped operation lever 34 and an L-shaped left and right connecting portion 35 in a plan view are integrally connected to each other, and a stopper 39 is bent at the tip of the left and right connecting portion 35. The stopper 39 may be provided with a cap made of rubber or the like as in the first embodiment.

The center frame 7 has four bearing brackets 36 which are open rearwardly fixed, and the horizontally long portions 35a of the connecting portions 35 are fitted into the bearing brackets 36. Therefore, the operation lever 34, the connecting portion 35, and the stopper 39 rotate up and down integrally. Between the cover plate 8 and the operation lever 34, a return tension spring 38 is extended. The operation lever 34 is provided with a slider 39a which is movable in the axial direction, and a lateral pin 39b is fixed to the slider 39a. On the lower surface of the cover plate 8, a groove 40 in which the pin 39b fits is provided.
The guide body 40 provided with a is fixed. As shown in FIG. 10, the groove 40a of the guide body 40 has a substantially heart shape.

Then, once the operating lever 34 is pushed down, the pin 39a is fitted into the recess at the lower end of the groove 40a, whereby the locked state is maintained. When the operating lever 34 is further depressed from this state, the pin 39a moves upward, disengaging from the lower end of the groove 40a, and enters the unlocked state. That is, when the operation lever 34 is pressed, the state is alternately switched between the locked state and the unlocked state, so that the operation is easy.

When the stopper 37 is in contact with the floor F, the connecting portion 35 is mainly elastically deformed, and the elastic restoring force keeps the stopper 37 in a state of being protruded against the floor. Note that the connecting portion 35 is elastically deformed by bending deformation of the longitudinal portion and torsion deformation of the horizontally long portion. Also, the operation lever 34 is slightly bent and deformed,
This contributes to the stopper 37 being stretched against the floor F. Therefore, in the present embodiment, the connecting portion 35 and the operation lever
34 also serves as the spring means described in the claims.

The second embodiment has the advantage that the number of members is small and the structure is extremely simple, so that the manufacturing cost can be suppressed at low cost. Further, since the operation lever 34 is vertically turned by a foot, the operation is simple. << Third Embodiment >> FIGS. 11 to 13 show a third embodiment. FIG. 11 is a plan view of the base 4, and FIG. 12 is an XII-XII of FIG.
FIG. 13 is a sectional front view taken along the line XIII-XIII of FIG. In FIG. 11, the cover plate 8 is omitted.

In this embodiment, a longitudinally extending rotary shaft 41 is disposed on the lower surface of the main frame 6, and the rotary shaft 41 is rotatably supported by bearings 42 provided on the front and rear lower surfaces of the main frame 6. An operation lever 34 protrudes from the front end of 41. A left and right longitudinal stay member 9 is inserted and fixed to the rear portion of the main frame 6, and a guide member 44 having a U-shaped cross section is fixed to both left and right ends of the stay member 9, and a rod 45 is attached to the left and right guide member 44. Insert the rod up and down freely, and the left and right rods
45 is integrally connected by a connecting rod 46. The guide body 44 has an elongated hole 47 for allowing the connecting rod 46 to move up and down,
Further, a cylindrical stopper 48 is fitted to the rod 45 so as to be unmovable and vertically movable.

The rod 45 is urged upward by a first spring 49 disposed on the upper surface of the guide body 44 (the upper end of the first spring 49 is received by a receiving rod 50 penetrating the upper end of the rod 45). . The stopper 48 incorporates a second spring 51 as an example of a spring means for biasing the stopper 48 downward. Furthermore,
At the rear part of the rotary shaft 41, an arm 52 is provided to abut on the connecting rod 46 from above so as to extend in an oblique direction.

In this embodiment, when the operating lever 43 is rotated to rotate the rotary shaft 41, the connecting rod 46 is pushed down by the arm 52, so that the left and right rods 45 are lowered together, and the stopper 48 is moved. It is locked by sticking to the floor. Since the stopper 48 and the rod 45 can move relative to each other,
As shown by the dashed line in FIG. 13, the connecting rod 46 can be pushed down until the arm 52 is in the vertical posture. Instead of the illustrated rod 45, the rod 22 of FIG. 5 may be attached.

The tip of the arm 52 may be formed in a flat surface so that the arm 52 can be held in a vertically downward posture, or a groove for fitting the tip of the arm 52 in the connecting rod 46 may be formed. You may leave it. << Others >> In the above embodiment, the lock device is provided on the base separated from the main body of furniture. However, when the base 4 is not provided, the lock device may be provided directly on the main body. An operating tool such as a lever may be provided on the upper part of the main body so that the lock / unlock operation can be performed without bending the body.

As the interlocking mechanism for converting the movement of the operation tool into the movement of the stopper, various mechanisms other than those shown in the figure can be adopted. As means for holding the stopper in contact with the floor surface, for example, a weight, a wedge action, or a cam mechanism can be used, but from the viewpoint of the reliability of the lock / unlock operation, Preferably uses spring means.

The operating tool is not limited to a rotary lever or handle, but may be anything that can operate a stopper via an interlocking mechanism.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wagon according to a first embodiment.

FIG. 2 is a plan view of a base.

3A is a sectional view taken along the line IIIA-IIIA of FIG. 2, and FIG. 3B is a sectional view of FIG.
FIG. 3B is a BB view, and FIG. 3C is a CC view cross section of FIG.

4A is a plan view of a main part, FIG. 4B is a cross-sectional view of BB in FIG. 4A, and FIG. 4C is a cross-sectional view of CC in FIG.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a diagram showing a locked state.

FIG. 7 is a perspective view of a second embodiment.

FIG. 8 is a bottom view of the second embodiment.

FIG. 9 is a front sectional view.

10A is a sectional view taken along the line XX of FIG. 8, and FIG.
FIG.

FIG. 11 is a plan view of the third embodiment.

FIG. 12 is a view along XII-XII of FIG. 11;

13 is a sectional view taken along the line XIII-XIII of FIG.

[Description of Signs] 1 Wagon as an example of movable furniture 2 Main body 3 Base 5 Caster 10,34,43 Operating lever 11 Link 12 Interlocking member 19 Guide box 20 Inclined surface 22 Rod 24 First spring 25,39,48 Stopper 28 Second spring 30 Cap 31 Guide pin

Claims (2)

[Claims] 1. A movable furniture having casters such as a wagon, a stopper for holding the furniture immovably by striking the floor, and an operation of bringing the stopper into and out of contact with the floor. And a lock device for mobile furniture. 2. A lock device for movable furniture, wherein a spring means is interposed between the operating tool and the stopper, and the stopper is protruded from the floor against the elasticity of the spring means.