JP2600806Y2 - Arbitrary position stopping mechanism for vertically movable object and movable hanging shelf device using the same - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for stopping an arbitrary position of a vertically movable object and a movable hanging shelf device using the mechanism.
More particularly, the present invention relates to a mechanism capable of stopping an object at an arbitrary height position and a movable hanging shelf device using the mechanism.

[0002]

2. Description of the Related Art Conventionally, a slide ring having an opening in a part of a sliding side surface is externally slidably fitted on an upright columnar column and slidably mounted on the slide ring. Position the cam portion protruding from the rotation base end in the opening,
With the bracket standing up, the cam portion can be freely moved in the vertical direction together with the slide ring away from the column side, and the cam portion presses the column side while the bracket is inclined substantially horizontally or downward. A lifting / lowering stop mechanism for stopping at a position is known, and a product having a clothes hanger function as a bracket has already been provided.

[0003] Further, there is known a constant tension spring for tension in which the tension is constant or a constant rotation torque in which the rotation torque is constant in a winding stroke in which the rope is wound around a drum, It is commercially available.

[0004] However, in the above-described conventional lifting and stopping mechanism,
In order to stop the object, a stopper such as an eccentric cam was required, and to operate the stopper, an operation such as rotating and displacing the bracket was required. The lifting / lowering stop mechanism using the eccentric cam has an advantage that the supporting strength in a state where the object is stopped is high. There was a problem in the durability.

[0005]

The problem to be solved by the present invention in view of the above-mentioned situation is that the object to be solved is to pull down or push up an object to an arbitrary position without using an eccentric cam as in the prior art. It is an object of the present invention to provide an arbitrary position stopping mechanism for an up-down movable object that can automatically stop an object at that position simply by causing the movable hanging shelf apparatus to use the mechanism.

[0006]

According to the present invention, in order to solve the above-mentioned problem, a support provided at a position eccentric from the center of gravity of an object is engaged with an upright guide rail so as to be slidable up and down. The object is suspended by a constant load spring installed in the vicinity of the guide rail, and the support comes into contact with two spaced apart points along the guide rail in a state where the object is stopped, and the following relational expression is obtained. Satisfactorily, an arbitrary position stopping mechanism for a vertically movable object, wherein the object can be stopped at an arbitrary position along the guide rail, is configured. | P | ≧ | W-W S | where, W is the weight of the object, W _S is a constant tensile force of the constant force spring, P is the vertical direction acting on the object by static friction resistance of the guide rail and the support frictional resistance Power.

[0007] Here, it is preferable that a support having an annular sliding portion is slidably fitted on the cylindrical guide rail, and the support is slidably positioned along the guide rail at a vertical interval. More preferably, the two supports are slidably engaged. Further, it is also possible to slidably engage one support having an annular sliding portion having a shaft length sufficiently longer than the diameter with the cylindrical guide rail.

A movable hanging shelf apparatus capable of moving the shelf body up and down along the guide rails by utilizing the above-mentioned mechanism, wherein at least two guide rails erected in parallel are provided with a center of gravity of the shelf body. At least a pair of support members provided on both sides of the back surface eccentric from the upper side are slidably engaged with each other, the upper end of the back surface of the shelf body is suspended by a constant load spring, and the guide body is stopped on the guide rail in a stopped state. The movable hanging shelf device is characterized in that the support tool contacts at two places spaced apart along the axis and satisfies the following relational expression, and the shelf main body can be stopped at an arbitrary position along the guide rail. . | P | ≧ | W-W S | where, W is the weight of the shelf body, W _S is a constant tensile force of the constant force spring, P is the static frictional resistance of the guide rails and support vertical direction acting on the shelf body Friction resistance.

Here, as described above, it is preferable that a support having an annular sliding portion is slidably fitted to the cylindrical guide rail, and is vertically spaced along the guide rail. More preferably, the two supports are slidably engaged with each other. Further, it is also possible to slidably engage one support having an annular sliding portion having a shaft length sufficiently longer than the diameter with the cylindrical guide rail.

[0010]

The mechanism for stopping an arbitrary position of a vertically movable object according to the present invention having the above contents will be described with reference to a simplified analysis model based on FIG. Assuming that the guide rail is set up vertically and the distance from the axis of the guide rail to the center of gravity G of the object having the weight W is D, the guide rail always receives the bending moment M. However, when there are n guide rails,
Each guide rail is M / n, but since n = 1, generality is not lost. Therefore, in the following formula, one guide rail and one constant load spring are shown as a total value. Here _{M = WD-W S D S} , W S is the tensile force of the constant force spring, D _S is the horizontal distance between the tensile force acting point of the guide rail and the constant force spring. The effective distance between a pair of upper and lower supports for supporting the object on the guide rail is d (when one support is mounted on one guide rail, the effective length of the sliding portion of the support is d). Then, the reaction force R received by one support in the direction perpendicular to the guide rail is R = M / d. Now, let μ be the static friction coefficient between the support and the guide rail.
When the frictional resistance force P in the vertical direction in which the object is subjected becomes P = 2μR = 2μM / d = 2μ (WD-W S D S) / d (1). Therefore, the condition for stopping the object is the weight W of the object.
The difference of the tensile force W _S of the constant force spring that is required less than or equal to or frictional resistance force P. Therefore, it is necessary to satisfy the following relational expression | P | ≧ | W−W _S | (2) (2) If you put expression of equation (1), | a (3) | 2μ (WD- W S D S) / d | ≧ | W-W S. As a special case, when D _S = D, equation (3) becomes 2 μD / d ≧ 1, and the presence or absence of the constant load spring has no relation to the stop condition. However, since μ is about 0.05, D / d ≧ 10 is a stopping condition, and the distance between the pair of supports is required to be small. If the spacing between the supports is small, the backlash and sliding of the guide rails cause the object to rattle and shake up and down, and a robust support structure that is not practical for mounting light structures such as shelves. Required and impractical. The mechanism considered here is to provide an optimal combination of D / d and D _S that satisfies Expression (3) according to the difference between W and W _S.

[0011] Next, W is, show this as an example a case that varies from W _S to 1.2W _S. Now, D _S = 0.2D
The stop condition is obtained by substituting W = 1.2W _S into the equation (3), and 2 μD / d ≧ 0.2. If μ = 0.05, D / d ≧ 2. d can be increased. Next, D / d
When is set to 2, the force required to raise this object is calculated. Now, the front side of the object, the horizontal distance of the guide rail upward position of 1.8D, when pressing with a force of P _u = αW _S, it is assumed that the object is increased. Applied bending moment and the frictional resistance force P to the guide _{rail, M = 1.2W S D-0.2DW} S -1.8DαW S = (1-1.8α) W S D P = 2μM / d = 2μ (1 −1.8α) W _S D / d, and when μ = 0.05 is inserted, P = 0.2 (1-1.8α) W _S (4) From vertical condition equilibrium of the system, the friction force is equal to the external _{force, P = -1.2W S + W S} + αW S = (α-0.2) W S (5) (4), (5) From both equations, α = 0.294 is immediately obtained. It can be seen that the difference between the weight of the object and the tensile force of the constant load spring can raise the object with a force slightly greater than 0.2 _WS . In addition, if the balance of the equation (3) is broken, it can be easily lowered. In fact, as a result of various studies,
It has been found that a structure with D _S = 0 to about 0.3 D and D / d = about 1.5 to 4 is most suitable.

According to the second aspect of the present invention, the mechanism and principle for stopping the shelf body at an arbitrary position along the guide rail are the same as those described above.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; 1 and 2 show a typical embodiment of the present invention, in which 1 is a guide rail, 2 is an object (shelf body), 3 is a support, and 4 is a constant load spring. In addition, the arbitrary position stopping mechanism of the vertically movable object according to the present invention engages the support 3 provided at a position eccentric from the center of gravity of the object 2 with the upright guide rail 1 so as to be slidable up and down. Are suspended by a constant load spring 4 installed close to the guide rail 1, and the supports 3, 3 are provided at two places along the guide rail 1 while the object 2 is stopped.
Are configured so as to contact with each other and satisfy the above-mentioned relational expression (1), and the object 2 can be stopped at an arbitrary position along the guide rail 1.

The movable hanging shelf device A using the above-described arbitrary position stopping mechanism is configured as described below. In this embodiment, a pair of left and right guide rails 1 and 1 made of a solid or hollow cylindrical member are provided at appropriate places such as a wall surface 5.
The upper and lower ends of the guide rails 1 are erected in parallel and vertically by fixtures 6, 6, and two guides 3, each having an annular sliding portion 7 on each of the guide rails 1, are slidably removed. The supporting members 3 are fixed to the back side of the shelf main body 2a as the object in a state where the supporting members 3 and 3 are vertically separated by a predetermined distance d. And
In the middle and upper part of the guide rails 1, 1, fixed load springs 4, 4 are fixed to a wall surface 5 or the like by moving toward the respective guide rails 1. It is fixed to the upper rear end of the shelf body 2a. In addition, shelf main body 2
A handle 9 is provided on the bottom surface on the back side of a. Although the shelf main body 2a of this embodiment has a box shape with an open front side, the shape of the shelf main body 2a is not particularly limited to that shown in FIG.

In this embodiment, the fixing members 6,... Are fixed to a horizontal fixing member 10, and the horizontal fixing member 10 is
The fixed load springs 4 and 4 are fixed to the upper horizontal fixing member 10 while the guide rail 1 is fixed to the guide rail 1 and the like. It is good. In addition, the horizontal fixing member 10 is separated into left and right parts, and the fixing unit 6 and the constant load spring 4 are fixed and unitized, respectively, and fixed to the wall surface 5 or the like at appropriate intervals to increase the degree of freedom of the mounting mode. Is also good.

Here, the constant load spring 4 has a constant tensile force W _S in a feeding stroke when the stainless steel ribbon-like cable 8 is wound around a drum and the cable 8 is paid out. Yes, for example, using Conston (trade name) manufactured by Sanko Hakko Co., Ltd. In this embodiment, between the pair of guide rails 1,1, is provided with the two constant force spring 4, 4, the number of the constant force spring 4, the selection and the shelf body 2a of the tensile force W _S It is appropriately set in consideration of the weight W and the frictional resistance P between the guide rail 1 and the support 3, and it is of course possible to use only one.

When the shelf main body 2a is to be lifted upward, the front lower surface of the shelf main body 2a is pushed up.
The shelf main body 2 a rises along the guide rail 1. Here, the frictional resistance P generated due to the weight W of the shelf main body 2a being eccentrically applied to the guide rail 1 is reduced by the reverse moment generated by the push-up force, so that the weight W of the shelf main body 2a is reduced. And the tensile force W _S of the constant load spring 4 can be pushed up by a force of about the difference. When lowering the shelf main body 2a, hold down the handle 9 and pull it down.
Can be balanced between the difference and the frictional resistance force P between the tensile force W _S of weight W and the constant force spring 4 of the shelf body 2a is to easily lowered tear. Here, it is preferable that the handle 9 is provided at a position close to the guide rail 1 so that an extra moment is not applied to the shelf main body 2a, that is, so as not to increase the frictional resistance.

If the shelf body 2a is raised or lowered to an arbitrary position and then released from the shelf body 2a, the above-mentioned relational expression (2) is satisfied, that is, the weight W of the shelf body 2a and the constant load spring 4 since the frictional resistance force P than the absolute value of the difference between the tensile force W _S is large, the shelf body 2a is to stop at that position.

Here, in the present embodiment, the guide rail 1 has been described as being set up vertically, but even if it is slightly inclined with respect to the vertical, there is no problem in principle. Although two guide rails 1 are used, one guide rail or three or more guide rails can be used in principle. Further, the number of the support members 3 mounted on each guide rail 1 is not limited to two, but may be one. In this case, the effective length of the sliding portion 7 of the support 3, that is, the effective length along the guide rail 1 is the above-mentioned distance d.
It is necessary to secure the length.

Next, roughly speaking, based on specific numerical values, the distance D from the axis of the guide rail 1 to the center of gravity G of the shelf body 2a, the distance d between the upper and lower supports 3, 3, and If the static frictional resistance μ is D = 20 cm d = 5 cm μ = 0.05, then P = 0.2 W, and if the weight of the shelf body 2 a is 4 kg and the tensile force of the constant load spring 4 is 4 kg, the shelf When the weight of the article put in the main body 2a is 1 kg, Therefore, even if an article having a weight of 1 kg or less is put into the shelf main body 2a, the shelf main body 2a does not drop due to its own weight. Then, the weight of the D and d and the shelf body 2a and the constant load spring 4
By changing the combination of the pulling forces, it is possible to build a movable hanging shelf device according to the application.

Incidentally, in the combination of the shelf main body 2a and the constant load spring 4, if D = 30 cm d = 3 cm μ = 0.1, then P = 1.0 W, and even if the constant load spring 4 is not provided, the friction is increased. The shelves 2a do not drop irrespective of the magnitude of the load of the articles to be stored, only by the resistance. However, in this case, a large force is required to raise and lower the shelf body 2a, and the guide rail 1
Since a large bending moment acts on the guide rail 1, it is necessary to increase the rigidity of the guide rail 1 accordingly, which is not practical. Therefore, it is practical to set the constant weight spring 4 to such an extent that the self-weight of the shelf body 2a is canceled, and to select a combination of μ, d and D from the weight of the articles stored therein. In addition, due to such characteristics, it can be used for storing relatively light articles. In other words, it is suitable when the change in the weight of the object 2 is small, and for example, a thing like a shrine is suitable.

FIG. 3 shows an example in which a plurality of pairs of movable hanging shelves A,... According to the present invention are incorporated in a system kitchen 11, a shelf main body 2a is arranged above a sink 12, and kitchen utensils such as pots are put in and out. In this case, the shelf main body 2a is used by pulling it down, and in other cases, it is stopped at a high position so as not to be in the way.

FIG. 4 shows a configuration in which a top plate 2b is adopted as the object 2, and the top plate 2b can be used as a table. Of course, it is also possible to place an article on this top plate 2b. In this case, since the work is performed on the front side of the top plate 2b, there is little danger that the top plate 2b will descend even when a heavy object is placed, and when it is not necessary, the top plate 2b can be raised near the ceiling. This is suitable when it is inconvenient to set up a table of a flip-up type at a place.

FIG. 5 shows another embodiment of the movable hanging shelf device A, in which two shelf main bodies 2a, 2a are arranged vertically, which are respectively raised and lowered, and stopped at an arbitrary position. This is what made it possible. That is, in the present embodiment, two guide rails 1 are erected on the left and right sides, and the upper shelf body 2a can be slid by the support members 3,. The lower shelf main body 2a is similarly mounted on a pair of outer guide rails 1 and 1,
It has a structure in which each shelf body 2a is suspended and supported by constant load springs 4,.

In the embodiment described above, the guide rail 1 and the constant load spring 4 are separately fixed via the horizontal fixing member 10 or directly to the wall 5 or the like. However, as shown in FIGS. A rail 1, a constant load spring 4, and a fixture 6,
Further, the support unit 3 is integrated to form a basic unit, and an appropriate number of these units are juxtaposed to form the above-mentioned movable hanging shelf device A.
Is to be constructed. That is, a hollow fixture 6 is fixed to the upper end of the guide rail 1 made of a hollow C-shaped pipe so that the respective internal spaces communicate with each other. Through the hollow portion of the guide rail 1, and the sliding portion 7 of the support 3 is slidably fitted in the hollow portion of the guide rail 1, and the support 3 projects forward through the opening 13 of the guide rail 1.
The shelf main body 2a and the like are fixed to the mounting portion 14, and the tip of the cord 8 is connected to a protruding piece 15 formed on the upper surface of the sliding portion 7 of the support 3 located above. An appropriate fixture 6 is attached to the lower end of the guide rail 1. In this way, if the mechanism is unitized and the object 2 to be attached to the support 3 can be selected, a wider variety of usage modes can be realized.

[0026]

According to the mechanism for stopping an arbitrary position of a vertically movable object of the present invention and a movable hanging shelf device using the same, a shelf body as an vertically movable object is raised to an arbitrary position along a guide rail. Or it can be lowered and stopped at that position, and it is applicable to a wide range of household use such as kitchen cupboards, entrance clogs, etc., storage shelves in stores and warehouses, storage shelves for miscellaneous goods in offices, etc. can do. In addition, the force required to lower or push up the shelf body is a force equivalent to the difference between the total weight of the shelf body and the tensile force of the constant load spring. For example, if the weight of the shelf body is offset by the tensile force of the constant load spring, The operation can be made very light because only the force of the weight of the articles stored in the main body is sufficient.

[Brief description of the drawings]

FIG. 1 is a simplified side view for explaining an operation of an arbitrary position stopping mechanism of a vertically movable object according to the present invention.

FIG. 2 is a perspective view showing an embodiment of a movable hanging shelf device configured using the mechanism.

FIG. 3 is a simplified perspective view showing a usage example in which a plurality of movable hanging shelf devices are combined.

FIG. 4 is a simplified side view showing an embodiment in which a table is configured.

FIG. 5 is a simplified front view showing an embodiment of a two-stage movable hanging shelf apparatus.

FIG. 6 is a longitudinal sectional view of a main part showing an embodiment in which a mechanism part is unitized.

FIG. 7 is a cross-sectional view of a main part of the same.

[Explanation of symbols]

 Reference Signs List A movable hanging shelf device 1 guide rail 2 object 2a shelf main body 2b top plate 3 support 4 constant load spring 5 wall 6 fixture 7 sliding portion 8 cable 9 handle 10 horizontal fixing member 11 system kitchen 12 sink 13 opening 14 mounting Part 15 protrusion

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) A47B 51/00 501 A47B 77/04 B65G 1/06 B66B 9/02

Claims (8)

(57) [Scope of request for utility model registration] 1. A support tool provided at a position eccentric from the center of gravity of an object is slidably engaged with an upright guide rail, and the object is fixed by a constant load spring installed close to the guide rail. When the object is stopped, the support comes into contact at two places spaced apart along the guide rail while the object is stopped, and the object can be stopped at an arbitrary position along the guide rail by satisfying the following relational expression. An arbitrary position stopping mechanism for a vertically movable object. | P | ≧ | W-W S | where, W is the weight of the object, W _S is a constant tensile force of the constant force spring, P is the vertical direction acting on the object by static friction resistance of the guide rail and the support frictional resistance Power. 2. The mechanism for stopping an arbitrary position of a vertically movable object according to claim 1, wherein a support having an annular sliding portion is slidably fitted on a cylindrical guide rail. 3. The two supporting members are slidably engaged with each other at positions vertically spaced along the guide rail.
Or the arbitrary position stopping mechanism of the vertically movable object according to 2. 4. The support according to claim 1, wherein one support having an annular sliding portion having a shaft length sufficiently longer than the diameter is slidably engaged with the cylindrical guide rail. Arbitrary position stop mechanism for vertically movable objects. 5. A movable hanging shelf device capable of moving a shelf body up and down along a guide rail, wherein at least two guide rails erected in parallel are provided on both sides of a back surface eccentric from the center of gravity of the shelf body. At least a pair of supports are slidably engaged with each other up and down, and the upper end of the back of the shelf body is suspended and supported by a constant load spring, and two places spaced along the guide rail in a state where the shelf body is stopped. The movable hanging shelf device, wherein the support tool comes into contact and the following relational expression is satisfied, and the shelf main body can be stopped at an arbitrary position along the guide rail. | P | ≧ | W-W S | where, W is the weight of the shelf body, W _S is a constant tensile force of the constant force spring, P is the static frictional resistance of the guide rails and support vertical direction acting on the shelf body Friction resistance. 6. The movable hanging shelf device according to claim 5, wherein a support having an annular sliding portion is slidably fitted to the cylindrical guide rail. 7. The two support members are slidably engaged with each other at positions vertically spaced along a guide rail.
Or the movable hanging shelf device according to 6. 8. The support according to claim 5, wherein one support having an annular sliding portion having a shaft length sufficiently longer than the diameter is slidably engaged with the cylindrical guide rail. Movable hanging shelf device.