JPH11127974A - Wagon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wagon which can secure safe state when a rising and falling plate rises vertically, securely hold the elevated rising and falling plate, and has operability for safely rising and falling the rising and falling plate. SOLUTION: A wagon 1 is provided with a box-shaped wagon body 2, and a rising and falling plate 3 in the upper part. The rising and falling plate 3 can rise and fall through elevating devices 4 and 4 in horizontal position. The elevated rising and falling plate 3 is held through holding members 5 and 5 from the lower side at the elevated height. The holding members 5 and 5 are constructed so as to fall inside through hinge mechanism 52 and 52.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wagon provided with a vertically movable plate. More specifically, when the elevating plate rises vertically, a stable state is secured, and the ascending elevating plate can be reliably supported,
Further, the present invention relates to a wagon having operability to safely raise and lower a lifting plate.

[0002]

2. Description of the Related Art For example, it is stored in a space below a desk,
Some wagons are used to improve the storage of documents. Since the wagon is provided with casters at the lower part, the wagon can be moved to the side of the desk and the upper surface thereof can be used as a work desk together with the top plate of the desk.

[0003] The wagon has a premise that it is of a size that can be stored in the space below the desk. Therefore, the height of the top of the wagon must be lower than the height of the top of the desk. Then, when the wagon is arranged beside the desk, a step is inevitably generated between the table top and the height of the wagon top. For this reason, there has been a disadvantage that it is difficult to perform desk work efficiently.

[0004] In order to solve the above-mentioned drawbacks, there has been proposed a wagon in which a vertically movable plate is provided on a wagon top plate. By raising the lift plate, the wagon can use the lift plate and the table top as the same surface, and can obtain good workability. By the way, in a wagon as described above, as a representative mechanism for raising and lowering the lifting plate,
Some use a parallel link mechanism (for example, Japanese Utility Model Registration No. 30000832, JP-A-6-343518).

[0005]

However, a wagon utilizing the above-described parallel link mechanism has the following problems. That is, the lift plate attached to the wagon moves up and down along an arc-shaped trajectory. Therefore, when the elevating plate is raised to the same height as the desk top, the elevating plate is shifted forward or backward with respect to the wagon body. For this reason, the wagon in the state in which the lifting plate is lifted has an unbalanced front and rear and is in an unstable state. Therefore, when an object with a large load is placed on the lift plate, there is a risk that the wagon will roll over.

When the lifting plate is shifted forward,
The wagon body will be located deeper than the lift plate. For this reason, there is a disadvantage that it is difficult to draw out the wagon body. In addition, if the back of the desk is immediately behind a wall, the wagon body will hit the wall even if it is desired to use the lift plate as the same surface as the top plate of the desk. If the lift plate is shifted rearward, the wagon body will protrude forward from the desk body when the lift plate is used as the same surface as the desk top plate. Therefore, it becomes an obstacle when working at the desk.

The raised plate is fixed at that position by a stopper member such as a poke bar provided between the lower surface of the lift plate and the upper surface of the wagon body. However, if a heavy load is roughly placed on the lifting plate, the impact may cause the stopper member to come off.

[0008] The parallel link mechanism uses a link member using a long metal bar. Then, the elevating plate is raised by the upright link member being turned upright. The operating state of the link member is normally hidden by the lift plate and invisible unless the person bends. For this reason, there is a risk that a finger may be pinched by the link member when the elevating plate is moved up and down.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and an object of the present invention is to provide a wagon capable of securing a stable state when an elevating plate rises vertically. Another object of the present invention is to provide a wagon having an operability capable of securely supporting the lift plate and raising and lowering the lift plate safely.

[0010]

Means of the present invention taken to achieve the above object are as follows. According to the first invention, the wagon body, a lift plate provided on the upper part of the wagon body, and the lift plate are vertically moved up and down within a predetermined lift range, and the raised lift plate is moved at a predetermined position. Fixable elevating means, comprising a tiltable support member for supporting the raised elevating plate, the support member,
The wagon is characterized in that the wagon is configured to stand upright to support the elevating plate when the elevating plate is raised, and to fall when the elevating plate descends.

[0011] In the second invention, the wagon body, an elevating plate provided on the upper part of the wagon body, the elevating plate is vertically moved up and down within a predetermined elevating range, and the raised elevating plate is moved to a predetermined position. Lifting means that can be fixed at the position, and a tiltable support member for supporting the raised lifting plate, the support member is vertically positioned when the lifting plate is raised. The wagon is characterized in that it stands up and supports the lifting plate, and when the lifting plate is lowered, it falls down in the horizontal direction and is stored below the lifting plate.

In the third invention, the elevating means includes:
A wagon according to the first or second aspect of the invention, which is formed in a retractable manner and expands and contracts vertically with respect to the upper surface of the wagon body.

[0013] In the fourth aspect, the support member includes a pair of members, and has a notch portion cut off on one side in the width direction and an extension portion relatively formed by forming the notch portion. In the first, second or third invention, the notch of one support member and the extension of the other support member are positioned so as to be fitted into each other when the lift plate is lowered. Such a wagon.

(Operation) The lifting plate rises vertically to the wagon body. Therefore, unlike a wagon using a parallel link mechanism, the lifting plate does not shift forward or backward with respect to the wagon body. Therefore, the following three effects occur. The wagon can maintain a stable state, and there is no danger that the wagon will roll over due to loss of balance even if a heavy load is placed on the elevator.

Since the wagon main body is not located deeper than the lift plate, the lift plate can be used as the same surface as the top plate of the desk even if there is a wall immediately behind the desk. Further, the drawer provided on the wagon body is not difficult to use.

The wagon body does not protrude forward from the lifting plate. For this reason, it does not disturb the desk work.

The raised plate is supported at that position by a vertically upstanding support member. That is, the support member is sandwiched between the lifting plate and the upper surface of the wagon body. For this reason,
If a large load is applied to the lift plate, the supporting force of the support member becomes strong due to the reaction. Therefore, even if a heavy load is roughly placed on the elevating plate like the stopper member of the parallel link mechanism, there is no danger that the support member will come off due to the impact.

The elevating means is formed in a retractable manner, and expands and contracts vertically with respect to the upper surface of the wagon body. For this reason, there is no member that pivots about the shaft like the link member of the parallel link mechanism, so that there is little danger of fingers being pinched too much when the elevating plate is raised and lowered.

The support members are arranged such that the cutout of one support member and the extension of the other support member are fitted to each other when the lifting plate is lowered. For this reason, by changing the height of the extension portion, it is possible to form a support member that matches the height position where the lifting plate rises within a limited width.

[0020]

Embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 1 is an explanatory view of a use state showing an embodiment of a wagon according to the present invention, and shows a state in which wagons are arranged beside a desk. FIG. 2 is an enlarged sectional view of a main part of the wagon body in a state where the lifting plate is raised, and shows an internal structure of a lifting device as a lifting means. (I) to (v) in FIG.
FIG. 3 is an enlarged sectional view of a main part showing each stage of vertical movement of a lifting device.

The wagon 1 is a box-shaped wagon body 2
And an elevating plate 3 is provided on the upper part thereof. The lifting plate 3 can be raised and lowered by the lifting devices 4 and 4 while maintaining the horizontal posture. The ascending / descending elevating plate 3 is supported at its height position from below by the supporting members 5 and 5.

The supporting members 5 and 5 have a notch 53 formed by cutting one of corners of a wooden plate having a rectangular shape in a plan view so that a cut portion becomes L-shaped. An extension 54 is formed, which is relatively caused by the above. The support members 5, 5 are formed with depressions 51, 51, 51, 51 for grasping by hand on a side surface facing outward from the front of the wagon body 2 (a surface which becomes an upper surface when the support member 5 is folded down). Each support member 5, 5 is connected to the top plate 25 by a hinge mechanism 52, 52 so that the support member 5, 5 can be turned inward. Thus, the support members 5, 5 are rotatable in a range from a vertical state to a horizontal state.

The wagon body 2 has a plurality of drawers 2
1, 22, and 23 are provided. In addition, a total of five moving casters 24 (partly not shown) are arranged at the four corners of the bottom surface of the wagon body and at the center of the front surface of the bottom surface.

The elevating plate 3 is formed of a flat plate having substantially the same size as the top plate 25. On the lower surface side of the elevating plate 3, shallow grooves 32, 32 (represented by dotted lines in the figure) for inserting the upright supporting members 5, 5 are formed at locations where the upper surfaces of the supporting members 5, 5 are in contact. ing. This allows
The support members 5 can reliably support the elevating plate 3. A stopper 31 made of a rubber member is provided at a rear central portion on the lower surface side of the lifting plate 3. Stopper 31
When the lift plate 3 is in a lowered state, the lift plate 3 can contact the top plate 25 to support the lift plate 3. The thickness of the stopper 31 is formed to be substantially the same as the thickness of the support members 5, 5 when the stopper 31 is folded inward.

The lifting devices 4 for lifting the lifting plate 3 are:
The wagon body 2 is housed in grooves 26, 26 provided in the vertical direction inside the left and right side plates. The lifting devices 4, 4 are fixed in the grooves 26, 26 by cover plates 27, 27.

The internal structure of the lifting devices 4, 4 will be described with reference to FIG. The elevating device 4 is provided with an outer angle pipe 41 and an inner angle pipe 42 as main components, and is formed in a retractable manner. When the inner angle pipe 42 slides up and down inside the outer angle pipe 41, the elevating plate 3 moves up and down.

More specifically, a mounting plate 43 is provided above the inner corner pipe 42. The mounting plate 43 is
The lifting plate 3 is attached to the lower surface on both left and right sides by screwing. A rotor 44 is attached slightly below the center of the side surface of the inner corner pipe 42. The rotor 44 is located slightly to the right in the width direction of the inner corner pipe 42. A guide body 45 is attached to the lower end of the inner corner pipe 42. The guide body 45 guides the inner angle pipe 42 at a center position inside the outer angle pipe 41.

The shape of the rotor 44 will be described in detail with reference to FIG. Recesses 442 and 446 are formed at both left and right ends of the rotor 44. Projecting fixing portions 441, 443, 445, 447 are formed on both sides of the concave portions 442, 446. Reference numerals 444 and 448 denote side surfaces of the rotor 44, which are formed linearly. The rotor 44 includes a shaft 44
When the lift plate 3 is raised to a predetermined height, the lift plate 3 is fixed at that position in cooperation with the inner angle pipe 42 and the outer angle pipe 41 when the lift plate 3 is raised to a predetermined height.

An opening 411 is formed near the upper portion of the outer pipe 41 formed in a square cylindrical shape. Opening 4
Numeral 11 is provided at a position corresponding to the rotor 44 of the inner corner pipe 42 when the lifting plate 3 is raised to a predetermined height. The opening 441 is formed in such a size that the rotor 44 can rotate at that position. A cap 46 having a projection 461 formed thereon is fixed to an upper portion of the outer corner pipe 41. For this reason, the inner corner pipe 42 does not fall out of the outer corner pipe 41.

Next, the lifting mechanism of the lifting plate 3 will be described with reference to FIGS. (I), (ii) and (iii) of FIG. 4 are enlarged front views of essential parts showing each stage of the vertical movement of the elevating plate 3. FIG. 5 is a sectional view taken along line AA of the wagon in the state shown in FIG.

The state of each stage in which the lifting plate 3 is raised is as follows. FIG. 4 (i) shows a state in which the wagon 1 is usually stored in the space 7 below the desk 6. The elevating plate 3 is descended to the lowest position, and the support members 5 and 5 are tilted down and settled in the space between the elevating plate 3 and the top plate 25.

The supporting members 5 and 5 have the cutouts 53 and 53 and the extensions 54 and 54 as described above (see FIG. 5). The folded support members 5 and 5 are arranged such that the cutout 53 of one support member 5 and the extension 54 of the other support member 5 are fitted into each other. For this reason, by changing the height of the extension portions 54, 54, the support members 5, 5 can be formed within the limited width and adjusted to the height position where the lifting plate 3 rises. Therefore, the support members 5, 5 can be attached to the same position in front of the top plate 25, and the wagon 1 is also excellent in design.

The wagon 1 is moved to the side of the desk 6 and arranged, and the lifting plate 3 is lifted in the arrow Y direction (see FIG. 4 (i)). At this time, the lifting devices 4 and 4 are in the state shown in FIG. The side surface 448 of the rotor 44 is
1 along the inner surface.

The lifting plate 3 is lifted to the highest position (see FIG. 4 (ii)). The operating states of the lifting devices 4, 4 at this time are represented by (i) to (ii) in FIG. When the inner pipe 42 slides upward, the rotor 44
The concave portion 446 contacts the protrusion 461. Then, the rotor 44 rotates counterclockwise slightly, and the fixing portion 441 projects outside the opening 441. The inner pipe 42 cannot be slid upward any more since the rotor 44 becomes the “presser”.

While supporting the raised lifting plate 3 with one hand, the support members 5, 5 are turned upright in the direction of arrow Z about the hinge mechanisms 52, 52 (see FIG. 4 (ii)). When holding the supporting members 5, 5 by hand, the depressions 51, 51, 51,
Try to grab 51.

The hand supporting the lift plate 3 is removed, and the lift plate 3 is placed on the upper ends of the support members 5, 5 standing up (see FIG. 4 (iii)). The upper ends of the support members 5 are inserted into grooves 32 provided on the lower surface side of the elevating plate 3. The operating states of the lifting devices 4 at this time are represented by (ii) to (iii) in FIG. When the inner pipe 42 slides downward, the fixing portion 441 of the rotor 44 contacts the lower end of the opening 411, and the rotor 44 rotates counterclockwise slightly. Further, the rotor 44 is locked when the fixing portion 443 further contacts the inner surface side of the outer angle pipe 41. As a result, the inner pipe 42 cannot be slid downward any more, and is fixed at its height position.

As described above, the lift plate 3 is moved by the lock mechanism of the lift devices 4 and 4 and the support of the supporting members 5 and 5 as shown in FIG.
i) is fixed. The lifting devices 4, 4 are designed in advance in consideration of the height of the top plate 61 of the desk 6 and the height of the top plate 25 of the wagon body 1, and the height of the supporting members 5, 5 is increased. And the height from the grooves 32, 32 to the top plate 25.

Next, the state of each stage in which the lift plate 3 is lowered will be described. From the state of FIG. 4 (iii), the lifting plate 3 is lifted to the highest position in the same manner as when the lifting plate 3 is raised. The movements of the lifting devices 4 at this time are shown in FIG.
v). When the inner pipe 42 slides upward, the lock of the rotor 44 is released. Then, the side surface portion 448 of the rotor 44 comes into contact with the protrusion 461. Therefore, the rotor 44 slightly rotates counterclockwise, and the fixing portion 443 also protrudes outside from the opening 441 similarly to the fixing portion 441.

The support members 5 and 5 are turned inward, and the elevating plate 3 is lowered. Then, the elevating plate 3 is placed on the fallen support members 5 and 5. The operating states of the lifting devices 4, 4 at this time are represented by (iv) to (v) in FIG. When the inner pipe 42 slides downward, the rotor 44
Side portion 444 contacts the lower end of the opening 411. Then, after the rotor 44 rotates counterclockwise, the side surface portion 444
Contact the inner surface side of the outer angle pipe 41, and the rotor 44 slides downward.

(Operation) At the time of desk work, the wagon 1 is moved from the space 7 below the desk 6 and placed on the side of the desk 6. Thereafter, the elevating plate 3 is raised, and can be used as a work surface together with the top plate 61 of the desk 6.

The lift plate 3 rises vertically with respect to the wagon body 2. For this reason, unlike the conventional wagon using the parallel link mechanism, the lifting plate 3 does not move forward or backward with respect to the wagon body 2. Therefore, the wagon 1 can secure a stable state, and there is no danger that the wagon 1 will be overturned due to a loss of balance even if a heavy load is placed on the lift plate 3.

Further, as described above, since the elevating plate 3 is not displaced forward with respect to the wagon body 2, even if there is a wall immediately behind the desk 6, the elevating plate 3 is not It can be used as the same surface as the top plate 61. Also, drawer 2
There is no disadvantage that 1,2,23 is difficult to use. Further, the lifting plate 3 does not shift rearward with respect to the wagon body 2. For this reason, the wagon body 2 is
It does not protrude more forward and does not interfere with desk work.

The elevating plate 3 which has risen to a predetermined position is supported at that position by the support members 5, 5 standing upright. That is, the upper ends of the support members 5, 5 are inserted into the grooves 32, 32 formed on the lower surface side of the elevating plate 3, and the top plate 25
Sandwiched between Therefore, if a large load is applied to the lift plate 3, the supporting force of the support members 5, 5 becomes strong due to the reaction. Therefore, an object having a large load, such as a stopper member of a parallel link mechanism, is violently moved to the elevating plate 3.
There is no danger that the support members 5, 5 will come off due to the impact even if they are placed on the top.

The lifting devices 4 and 4 are formed in a retractable manner, and extend and contract vertically with respect to the upper surface of the wagon body 2. For this reason, there is little danger of a finger being pinched when the elevating plate 3 is moved up and down like a rotating link member of the parallel link mechanism.

When the lifting plate 3 is raised, a large space is formed between the lifting plate 3 and the top plate 25, so that it can be newly used as a shelf.

The terms and expressions used in the specification are merely illustrative and not restrictive. Terms and expressions equivalent to the features described in the specification and some of them are not limited to the terms and expressions. There is no intention to exclude expression. It goes without saying that various modifications are possible within the scope of the technical idea of the present invention.

[0047]

The present invention has the above configuration and has the following effects. (A) The lifting plate rises substantially perpendicular to the wagon body. Therefore, unlike a wagon using a parallel link mechanism, the lifting plate does not shift forward or backward with respect to the wagon body. Therefore, the following three effects occur. The wagon can maintain a stable state, and there is no danger of the wagon rolling over due to loss of balance even when a heavy load is placed on the lift plate. Since the wagon body is not located deeper than the lift plate, even if there is a wall immediately behind the desk, the lift plate can be used as the same surface as the top plate of the desk. Further, the drawer provided on the wagon body is not difficult to use. The wagon body does not protrude forward from the lift plate. For this reason, it does not disturb the desk work.

(B) The raised plate is supported at that position by a vertically upstanding support member. That is, the support member is sandwiched between the lifting plate and the upper surface of the wagon body. Therefore, if a large load is applied to the lift plate, the supporting force of the support member becomes strong due to the reaction. Therefore, even if a heavy load is roughly placed on the elevating plate like the stopper member of the parallel link mechanism, there is no danger that the support member will come off due to the impact.

(C) The elevating means is formed in a retractable manner, and expands and contracts vertically with respect to the upper surface of the wagon body. For this reason, there is no member that pivots about the shaft like the link member of the parallel link mechanism, so that there is little danger of fingers being pinched too much when the elevating plate is raised and lowered.

(D) The support member is positioned such that the cutout of one support member and the extension of the other support member are fitted to each other when the lifting plate is lowered. For this reason, by changing the height of the extension portion, it is possible to form a support member that matches the height position where the lifting plate rises within a limited width.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a use state showing an embodiment of a wagon according to the present invention, showing a state in which wagons are arranged beside a desk.

FIG. 2 is an enlarged sectional view of a main part of the wagon body in a state in which a lifting plate is raised, and shows an internal structure of the lifting device.

FIG. 3 is an enlarged sectional view of a main part showing each stage of vertical movement of the lifting / lowering devices 4;

FIG. 4 is a main part enlarged front view showing each stage of the vertical movement of the lifting plate 3.

FIG. 5 is a sectional view of the wagon taken along the line AA in the state of FIG. 4 (i).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wagon 2 Wagon main body 21, 22, 23 Drawer 24 Caster 25 Top plate 26 Groove 27 Cover plate 3 Elevating plate 31 Stopper 32 Groove 4 Elevating device 41 Outer angle pipe 411 Opening 42 Inner angle pipe 43 Mounting plate 44 Rotor 440 Shaft 441 443, 445, 447 Fixing part 442, 446 Concave part 444, 448 Side part 45 Guide body 46 Cap 5 Support member 51 Depression 52 Hinge mechanism 53 Notch 54 Extension

Claims (4)

[Claims] 1. A wagon body (2), an elevating plate (3) provided on an upper portion of the wagon body (2), and the elevating plate (3) are vertically raised and lowered within a predetermined elevating range. An elevating means capable of fixing the elevating plate (3) at a predetermined position, and a tiltable support member (5, 5) for supporting the elevating elevating plate (3), The support members (5, 5) stand vertically and support the lifting plate (3) when the lifting plate (3) is raised, so that when the lifting plate (3) descends, it falls down. A wagon characterized by being configured in a wagon. 2. A wagon body (2), an elevating plate (3) provided on an upper part of the wagon body (2), and the elevating plate (3) are vertically moved up and down within a predetermined elevating range and raised. An elevating means capable of fixing the elevating plate (3) at a predetermined position, and a tiltable support member (5, 5) for supporting the elevating elevating plate (3), The support member (5, 5) stands vertically to support the lifting plate (3) when the lifting plate (3) is raised, and is horizontal when the lifting plate (3) is lowered. A wagon characterized in that the wagon falls down and is accommodated below the lifting plate (3). 3. The wagon according to claim 1, wherein said elevating means is formed in a retractable manner, and expands and contracts vertically with respect to the upper surface of the wagon body. 4. The support member (5, 5) is formed of a pair of members, and a notch (53, 53) having one side cut in a width direction;
Extension formed relatively by the formation of notches (53, 53)
(54, 54), when the lifting plate (3) is lowered, the notch (53) of one support member (5) and the other support member
A wagon according to claim 1, 2 or 3, characterized in that the extensions (54) of (5) are positioned so as to fit into one another.