JP3795179B2 - Table top and bottom lifting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a table, and more particularly to a lifting device for a table top plate.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a table in which the height position of a table top plate is variable according to a user's body shape and application is known.
[0003]
The conventional lifting device for raising and lowering the table top as described above rotates the handle manually or electrically, and transmits the rotational motion to the screw shaft via the bevel gear or the crank mechanism. Means for raising and lowering the top plate that is screwed to it by rotation, or recently, means for raising and lowering the top plate using a gas spring that is relatively inexpensive and easy to operate has been generally employed.
[0004]
[Problems to be solved by the invention]
However, in the former, there is a problem that it takes time to operate because the handle is moved up and down by raising and lowering the top plate, and a structure for using transmission members such as screw shafts and gears is used. It becomes complicated and expensive, and if the fitting and engagement parts such as screw shafts and gears are worn or loosened, it tends to interfere with the lifting performance of the top board. Therefore, the top board is converted to a vertical position (folding). Therefore, it was difficult to save space when not in use.
[0005]
In the case of using the latter gas spring, it is impossible to expect the movement corresponding to the increase / decrease of the load of heavy objects such as OA equipment loaded on the top plate, and the top plate is supported by two or more legs. In a table or the like of a structure that supports the top plate, several gas springs and transmission parts such as gears are required to translate the top plate in the vertical direction, which is also expensive and expensive. There was a problem.
[0006]
[Means for Solving the Problems]
In view of the above-mentioned points, the present invention has an object of enabling the elevator to move up and down steplessly, as well as making it possible to appropriately raise and lower the load loaded on the top plate. It is intended to be applicable even when space is saved by converting the top plate to a vertical posture.
[0007]
As means for solving the above-mentioned problems, the present invention is a table having left and right legs that are fitted with an upper leg to a lower leg so that the upper leg can be expanded and contracted, and a top plate supported by the upper leg. A lifting operation lever pivotally attached to the lower surface of the top plate, and left and right gas spring receivers that move in the separation direction over an equal distance by the turning motion of the operation lever, A gas spring receiver and the lower leg are connected to each other through a connecting member that can be bent in the middle, and a base end of the gas spring is attached to one of the gas spring receivers, and the rod is attached to the other. wherein pushes the left and right gas spring receiving by extension force of the rod of the gas spring so as to raise the top plate during operation, the connecting member has a vertical rod fixed to the lower leg, the Gasusupuri A horizontal rod fixed to the grayed receiving, in which is composed of a coil spring take over and these vertical rods and a horizontal rod.
[0008]
The top plate is fixed to a top plate support rotatably supported from a horizontal posture to a vertical posture around the axis on the upper leg, and the top plate holder is locked at that position in a horizontal or vertical posture. By providing the locking means, the table can be stored in a standing posture when the table is not used, and space saving can be achieved.
[0009]
Further, a lock release lever for releasing the lock of the gas spring is provided next to the operation handle of the lifting operation lever, and when the operation lever is turned, the lock release lever is grasped simultaneously with the operation handle to lock the gas spring. It becomes possible to improve the operativity at the time of raising / lowering a top plate by canceling | releasing.
[0010]
The connecting member comprises a vertical rod fixed to the lower leg, a horizontal rod fixed to the gas spring receiver, and a coil spring connecting the vertical rod and the horizontal rod, thereby moving the gas spring receiver. It can be reliably transmitted to the upper leg.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to embodiments shown in the drawings.
[0012]
FIG. 1 shows an example of a table to which the present invention is applied. The table 1 has legs 2 and 2 erected on the left and right sides and a top plate 3, and the top plate 3 extends in a vertical direction over a predetermined stroke. It is moved up and down in parallel.
[0013]
As shown in FIGS. 2 and 3, the legs 2 and 2 are fixedly erected on a horizontal frame 5 having wheels 4 and 4 attached to front and rear lower surfaces. A guide roller 8 is composed of a leg 6 and an upper leg 7 fitted on the lower leg 6, and the upper leg 6 is pivotally attached so that a part of the upper leg 6 protrudes from the upper and lower side surfaces of the lower leg 7. , 8 so that the inner surface is guided and the upper leg 7 can be raised and lowered with respect to the lower leg 6.
[0014]
Hollow guide members 9, 9 project horizontally from the opposite side surfaces of the upper ends of the upper legs 6, 6, and the guide members 9, 9 and the inside of the upper legs 7, 7 are connected to each other. The lower surface of the communicating portion is a rounded curved surface 9a.
[0015]
The left and right side frames 10a, 10a of a top plate receiver 10 made of a rectangular frame in plan view are fixed to the top surfaces of the guide members 9, 9, and the top plate 3 is fixed to the top surface of the top plate receiver 10. ing. The guide members 9 and 9 are fixedly provided with top plate brackets 11 and 11, and the top plate holder 10 is pivotally supported by a shaft 13 in shaft holes 12 and 12 at one end of the top plate brackets 11 and 11. The top plate 3 can be converted from a horizontal posture to a vertical posture around the axis 13.
[0016]
A vertical rod 14 having a lower end fixed to the lower leg 6 is provided inside the upper legs 7, 7, and the guide member 9 has a horizontal portion 9 b along a guide rail (not shown) on the lower surface of the top plate 3. One end side of a horizontal rod 15 provided so as to be movable in the axial direction is inserted, and the vertical rod 14 and the horizontal rod 15 are connected by a bendable member, for example, a coil spring 16 to constitute a connecting member. The coil spring 16 moves in the range of the curved surface 9 a of the bent portion of the guide member 9.
[0017]
Gas spring receivers 17 and 17 are respectively fixed to the other ends of the horizontal rods 15 and 15, one gas spring receiver 17 is attached with a base end of a gas spring 18, and the other gas spring 17 has a rod attached thereto. The tip of 19 is connected. Further, short levers 25 and 25 are pivotally attached to bearing portions 20 and 20 formed on one side of the gas spring receivers 17 and 17 so as to be freely raised and lowered.
[0018]
On the other hand, an intermediate portion of the operation lever 21 for raising and lowering the top plate is pivotally attached to the center position in the width direction of the lower surface of the top plate 3 by a shaft 22. One ends of the equal length left and right links 23, 23 are connected by pins 24, 24, and the other ends of the links 23, 23 are connected to levers 25, 25 of the gas spring receivers 17, 17 by pins 25a, 25a. The left and right gas spring receivers 17 and 17 are formed to move equidistantly when the operation lever 21 is rotated about the shaft 22.
[0019]
An operation handle 26 at the end on the hand side of the operation lever 21 is located near the front end of the top plate 3, and a lock release lever 27 for releasing the lock of the gas spring 18 is provided on the operation handle 26. 28 is pivotally attached.
[0020]
A cable 31 connected to a lever 30 for pushing in a release rod 29 (shown in FIGS. 4 and 5) of the gas spring 18 is connected to the back end of the lock release lever 27, and the lock release lever 27 is operated. By pulling toward the lever 21 side, that is, by simultaneously grasping the unlocking lever 27 and the operating handle 26 of the operating lever 21, the lever 30 is pulled against the return spring (not shown) through the cable 31, and the lever 30 is released from the release state. The gas spring 18 is unlocked by pushing the service rod 29.
[0021]
The operation handle 26 can be fixed to the operation lever 21 at an arbitrary position within the range of the long hole 32 with a long hole 32 and a set screw (not shown), and can be operated according to the magnitude of the user's operation force. The length of the lever 21 can be adjusted to the length that can be operated most easily. As a result, the distance from the shaft 22 to the pin 24 and the distance from the shaft 22 to the operation handle 26 change, so that it is possible to appropriately move up and down even when the load on the top plate 3 increases or decreases.
[0022]
One side frame 10a of the top plate receiver 10 is provided with a locking means for fixing the top plate 3 in a horizontal posture or a vertical posture. This locking means has a folding lever 33 provided so as to be slidable in the front-rear direction along the side frame 10a, and has a handle 33a at the proximal end of the lever 33, which is normally retracted by a spring (not shown). The side plate has a kerf-shaped horizontal locking portion 34 formed so as to be released toward the front side of the top plate bracket 11 or a rear side of the top plate bracket 11 upward. An engagement protrusion 36 that can engage with the released hook-like vertical locking portion 35 is provided.
[0023]
Next, the operation will be described.
[0024]
1 and 4 show the state when the top plate 3 is at the lowest position. To raise the top plate 3 from this state, the operating handle 26 of the operating lever 21 and the lock release lever 27 are grasped simultaneously. As the lock release lever 27 is rotated, the lever 30 is pulled against the spring through the cable 31, and the release rod 29 is pushed to unlock the gas spring 18.
[0025]
Thus, when the operating handle 26 of the operating lever 21 is moved to the right in FIG. 1, the operating lever 21 rotates about the shaft 22 counterclockwise in FIG. 1, and the extension force of the gas spring 18 is added to the rotating operating force. In addition, the links 23 and 23 are pushed with a light force, and the left and right gas spring receivers 17 and 17 connected thereto are pushed by an equal distance.
[0026]
The movement of the gas spring receivers 17 and 17 pushes the horizontal rods 15 and 15 fixed thereto, and pushes the vertical rods 14 and 14 through the coil springs 16 and 16. Since the vertical rods 14 and 14 are fixed to the lower legs 6 and 6, the movement of the gas spring receivers 17 and 17 is converted into a force for pushing up the top plate 3, thereby moving the gas springs 17 and 17 by the moving distance h. Only the upper legs 7, 7 are pushed up as shown in FIG. If the lock release lever 27 is released here, the gas spring 18 is locked again, and the top plate 3 is held at its height position.
[0027]
In order to lower the top plate 3, the lock release lever 27 is operated in the same manner as described above, and the operation handle 26 of the operation lever 21 is moved to the left, and the gas spring receivers 17, 17 are connected via the links 23, 23. Move toward each other, and the upper legs 7 and 7 are lowered along the lower legs 6 and 6 due to the weight of the top plate 3 and the like. Also at this time, the gas spring 18 is shortened to serve to prevent the top plate 3 from being rapidly lowered.
[0028]
In general, the elevation h is about 70 to 100 mm, and the height H when the top plate 3 is lowered is about 700 mm.
[0029]
Accordingly, as described above, the operation lever 21 and the lock release lever 27 are operated to move the top plate 3 up and down, and when the height of the top plate 3 reaches the optimum value, the lock release lever 27 is released to lock the gas spring 18. For example, it can be used as a table of that height.
[0030]
Next, when the top plate 3 is folded from the horizontal position to the vertical position and stored, when the hand is pulled on the handle 33a of the folding lever 33 (FIG. 6 (A)), the engagement projection 36 is moved to the top. The top catch 3 rotates about the shaft 13 when the front end of the top plate 3 is lifted upward, so that the top plate 3 is in a vertical posture. Then, the engaging protrusion 36 engages with the vertical locking portion 35 on the rear side of the top plate bracket 11 from above, and the top plate 3 is locked in the vertical position (FIGS. 3 and 6B). )). The links 23 and 23 move together with the operation lever 21 and the top plate 3 by the rotation of the levers 25 and 25 (shown in FIG. 3).
[0031]
When returning the top plate 3 to the horizontal posture again, pulling the handle 33a of the folding lever 33 in the same manner as described above, the engaging projection 36 comes out of the vertical locking portion 35, and the top plate 3 is tilted forward as it is. If it does so, it will return to a horizontal attitude | position, and the engagement protrusion 36 will be engaged with the horizontal latching | locking part 34 at that time, and will be locked in a horizontal state (state of FIG. 6 (A)).
[0032]
In the above embodiment, the case where the lock release lever 27 of the gas spring 18 is attached to the operation lever 21 for easy operation is shown. However, the lock release lever of the gas spring 18 is located at a position different from that of the operation lever 21. You may make it provide. Further, the locking means in the horizontal and vertical postures of the top plate 3 is not limited to the illustrated example, and any appropriate means can be adopted depending on the size and structure of the table. Further, although the case where the coil spring 16 is used as the bendable connecting member has been shown, an incompressible fluid or a granular material may be packed in a bendable tube.
[0033]
【The invention's effect】
As described above, according to the present invention, the top plate can be lifted with a light force only by using a single gas spring, and even if the load loaded on the table is large, it is easy and quick. The top plate can be raised and lowered.
[0034]
In addition, even when the top plate can be rotated so that the top plate can be converted from a horizontal posture to a compact vertical posture as in claim 2, the lifting device rotates together with the top plate. Therefore, it can be stored in a slim form, and the operation portion of the lifting device is located on the back surface of the top plate, so that the operation when returning the top plate to the horizontal posture can be easily performed.
[0035]
Further, if the lock release lever of the gas spring is attached to the operation handle of the operation lever as in claim 3, the operability when the top plate is raised and lowered can be further improved.
[Brief description of the drawings]
FIG. 1 is a perspective view when a top plate is lowered according to an embodiment of the present invention.
FIG. 2 is a perspective view when the top plate is raised.
FIG. 3 is a perspective view showing a state in which the top board is in a vertical posture.
4 is a front view of FIG. 1. FIG.
FIG. 5 is a front view of FIG. 2;
6A is a side view showing a state when the top plate is horizontal, and FIG. 6B is a side view showing a state when the top plate is vertical.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Table 2 Leg 3 Top plate 5 Frame 6 Lower leg 7 Upper leg 8 Guide roller 9 Guide member 10 Top plate receiver 11 Top plate bracket 13 Shaft 14 Vertical rod 15 Horizontal rod 16 Coil spring 17 Gas spring receiver 18 Gas spring 19 Rod 21 Operation lever 23 Link 26 Operation handle 27 Lock release lever 29 Release rod 30 Lever 31 Cable 33 Folding lever 34 Horizontal locking part 35 Vertical locking part 36 Locking protrusion

Claims (3)

A table having left and right legs that are fitted to the lower leg so that the upper leg can be extended and contracted in the vertical direction, and a top plate supported by the upper leg. And a left and right gas spring receivers that move in the separating direction over an equal distance by a pivoting movement of the operation lever, and the gas spring receivers and the lower legs are halfway between them. It is connected via a connecting member that can be bent, and the base end of the gas spring is attached to one of the gas spring receivers, and the rod is attached to the other. Push the left and right gas spring holders to raise the top plate ,
The connecting member includes a vertical rod fixed to the lower leg, a horizontal rod fixed to the gas spring support, and a coil spring connecting the vertical rod and the horizontal rod. Top plate lifting device.   The top plate is fixed to a top plate support rotatably supported from a horizontal posture to a vertical posture around the axis on the upper leg, and the top plate support is locked at that position in a horizontal or vertical posture. The table top lifting apparatus according to claim 1, further comprising a locking means. A lock release lever for releasing the lock of the gas spring is provided adjacent to the operation handle of the elevating operation lever, and when the operation lever is turned, the lock release lever is grasped simultaneously with the operation handle to lock the gas spring. The table top / bottom lifting device according to claim 1 or 2, wherein the table top plate lifting / lowering device is released.

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