JPS6036086Y2 - telescoping table - Google Patents

Description

[Detailed explanation of the invention] This invention differs from the conventional folding type using hinge rotation.
The present invention aims to provide a table whose top plate can be automatically expanded and contracted only by automatic operation of pulling out and pushing in the top plate.

Hereinafter, the details of the present invention will be explained using illustrated examples.
In Figure 2, there is a base frame 1 fixed to the table legs, a lower top plate 2 that is attached to the base frame so that it can only move up and down, and an upper top plate that is attached to the base frame so that it can move only in the horizontal direction. 3, and a cam mechanism 4 interposed between the base frame and the upper and lower top plates, and the cam mechanism 4 has a shortened state A in which the upper and lower top plates 3 and 2 partially overlap one another, and a cam mechanism 4 in which the upper and lower top plates 3 and 2 are partially stacked one on top of the other, and the other in the shortened state An extended state B in which the plates 3 and 2 are adjacent to each other on the same horizontal plane, and first and second overdrawn states C1 and C2 in which the upper and lower top plates 3 and 2 are spaced apart from each other on the same horizontal plane,
By repeatedly pulling out and pushing in the upper top plate 3, a shortened state A1, a first overdrawn state C5, an extended state B, a second overdrawn state C2,
It is configured to be automatically repeated in the order of shortened state A.

As shown in FIGS. 3 to 6, the base frame 1 is
A pair of front and rear main bodies 5, a U-shaped transverse bone 6 fixed to the inside thereof, a connecting plate 7 connecting the front and rear transverse bones, a support 8 at the center of the connecting plate 7, and rotatably supported on this. A guide plate 11 with a lifting guide hole 10 fixed to the end of the transverse frame 6, and a guide groove 12 for horizontal movement recessed in the upper surface of the main body 5.

Further, a horizontal rod 13 is fixed to the lower surface of the lower top plate 2, and a lifting pin D is fixed to this through a support piece 14, and the pin D is fitted into the guide hole 10.

In addition, an inverted T-shaped guide 15 that fits into the groove 12 is fixed to the front and back of the lower surface of the pair of left and right upper top plates 3, and a mounting plate 16 is fixed to the center part, and the pinion 9 and the pinion 9 are fixed to the center part. The engaged rack 17 is fixed, and the cam support piece 18 is also fixed.

Therefore, when one of the top plates 3 is pushed or pulled, the other top plate 3 is similarly pushed or pulled by the rotational linear movement conversion mechanism J consisting of a pair of racks 17 and pinions 9.

The cam mechanism 4 is provided in two groups corresponding to the front and rear of each top plate 3, so there are four in total, but the explanation will be given only for one of the cam mechanisms 4. Branch piece 1
The first cam E1 is fixed to the upper top plate 3 via the first cam E1, the sliding edge 19 formed on the lower side 6a of the horizontal rib 6, the lower hole 20 for the lifting pin D, the diagonal hole 21, the upper left The hole 22 and the upper right hole 23, the second cam E2 attached to the first cam E1 so as to be able to move laterally through the hole 24 and the protrusion 25, the oblique hole 21a formed therein, the upper right hole 23a1, the pawl F□, and the slope G claw F2 and
A third cam E3 is attached to the first cam E1 so as to be movable up and down through a hole 26 and a protrusion 27 and is urged downward by a spring 28, a pawl F3 formed thereon, a slope G, a pawl with a G, F4, and a shaft. A lifting piece H1 with a slope G is pivotally mounted at h1, a stopper h2 abuts against the left edge of the lifting piece 11, and a hole 29 and a protrusion 3 in the first cam E1.
The fourth cam E4 is mounted so as to be movable left and right at 0 and biased rightward by a spring 31, a pawl F5 formed on the fourth cam E4, and a pawl F6 with a slope G.

Next, the operation of the cam mechanism 4 will be explained.

In the shortened state A, which is the first usage state, the cam mechanism 4 is in the sixth position.
Since it is in the state shown in the figure, if you pull out the upper top plate 3 to the right in Figure 4, the first to fourth cams E1 to E4 will move to the right,
Relatively, the lifting pin D of the lower top plate 2 is from the position D□ to D1
', here it comes into contact with the slope G, raises the elevating piece H, and at the same time sets the third cam E3 to the solid line position, and then moves the lower hole 20
, proceed through the diagonal hole 21 and reach D2.

Next, as shown in FIG. 5, the pin D advances integrally with the second cam E2 and moves to D3. When D4 is reached, this is the first overdrawn state C1.

In addition, from D3 to D4, the claw F1. Since R5 is engaged, the claw F3. F is disengaged.

Next, when the upper top plate 3 is pushed to the left, the pin D advances through the upper right hole 23.23a of the 1.2 cam EHR2 as shown in FIG.
6, as shown in Fig.
is engaged, this is the second usage state, extended state B
It is.

Next, when the upper top plate 3 is pulled out, the pin D reaches D7 and becomes the second overdrawn state C2, but at this time, the claw F2. Since F4 is engaged, the second cam E2 is connected to the first and third cams E1. You cannot move from R3.

Therefore, the pin D, which is under the weight of the lower top plate 2, descends and reaches D8, and when the upper top plate 3 is pushed, the pin D reaches D9,
Here, the elevating piece H is freely rotated H' until it reaches Dl, and returns to the shortened state A shown in FIG.

In addition, when the pin raises the elevating piece H at position D1' (see Fig. 4), the claw F4 of the third cam E3 will be explained with reference to Fig. 6.
Remove the claw F2 of the second cam E2 and the claw F3 and the fourth cam E4.
and the claw F6.

Next, referring to FIGS. 7 to 10, the automatic operating device for automatically pushing and pulling the upper top plate 3 will be explained. As shown in FIG. a torque limiter L that is interposed between the pinion m and the pinion 9 and transmits only a torque below a certain level; and the pinion 9 and the rack 1.
Rotation and linear movement conversion mechanism J consisting of 7 and 8.9.10
It is composed of a control circuit that controls forward and reverse rotation of the motor M shown in the figure.

In addition, in Fig. 8, limit switches LS□, LS
2. LS is fixed to the main body 5, its operating dock 16a is fixed to a part of the lower surface of the upper top plate 3, the limit switch LS3 is fixed to the horizontal rib 6, and its operating dock 14a is fixed to the support piece 14. Fixed.

FIG. 9 is an extension/shortening auxiliary circuit diagram, and FIG. 10 is a motor forward/reverse control circuit diagram.

In the automatic operating device described above, when the table is extended from the shortened state A, when button PB1 is pressed, relay R□ is energized, its a contact is turned on, and its b contact is turned off.

Then, relay Ro is energized, its a contact is turned on, its b contact is turned off, and motor M rotates normally.

Then, the upper top plate 3 moves in the extension direction, and switches I and S2 are activated.
is pressed, but since timer T1 is off, timer T2 does not operate, and then the first overdrawn state C1 occurs, and switch I,
When S1 is pressed, timer T1 generates tf1 and its 0.5
After a second, the a contact turns on and the b contact turns off, so relay R
o is demagnetized and relay 3 is energized, so the motor M is reversed and the waist top plate 3 moves in the shortening direction, presses switch LS2, timer T2 is activated, and after that O0 hoe, relay R1 is demagnetized and comes to a full stop. Then, it becomes the extended state B.

Also, when shortening, press the button PBl! When you press , relay R2 is energized and Ro is also energized, so the motor M rotates forward and the upper plate 3 moves in the extension direction to reach the second overdrawn state C2.
becomes.

Then, the lower top plate 2 starts to descend under its own weight, and when LS3 is pressed, T3 is activated, and after 0.5 seconds, the a contact is turned on, and the b
Since the contact is turned off, Ro is demagnetized and Lo is excited, so the motor M reverses, and the upper plate 3 moves in the shortening direction.
Press LS.

Then, T4 is activated, and after that O0, R2 is demagnetized, so Ro and Lo are demagnetized, and the motor is completely stopped and enters the shortened state A.

Note that in the extended state where LS2 is pressed, PB1 is not turned on, and in the contracted state where LS2 is pressed, PB2 is not turned on.

As is clear from the above explanation, the cam mechanism 4 of the present invention is
A shortened state A in which the upper and lower top plates 3 and 2 are partially stacked one above the other; an extended state B in which the upper and lower top plates 3 and 2 are adjacent to each other on the same horizontal plane; The first spaced apart
, the second overdrawn state C, C2 becomes the shortened state A, the first overdrawn state C1,
It is configured to automatically repeat the extended state B, the second over-extended state C2, and the shortened state A in this order, and is configured so that the push and pull operation of the top plate can be performed by an electric motor, making it extremely easy to use. This has the great effect of providing a table.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a schematic exploded perspective view, Fig. 2 is an explanatory view of the operation, Fig. 3 is a longitudinal side view, and Fig. 4.5.6 is an operation of the cam mechanism. 7 is a front view of the conversion mechanism section, FIG. 8 is an explanatory diagram of the expansion/contraction stroke, FIG. 9 is an expansion/contraction auxiliary circuit diagram, and FIG. 10 is a forward/reverse control circuit diagram of the electric motor. 1: Base frame, 2: Lower top plate, 3: Upper top plate, 4: Cam mechanism, A
: shortened state, B: extended state, C1; first overdrawn state, C
2: 2nd overdrawn state, D = lifting pin, E1 to E4: 1st
~4th cam, M: electric motor, J: conversion mechanism.

Claims (1)

[Scope of utility model registration request] a base frame 1 fixed to a table leg; a lower top plate 2 attached to the base frame so as to be able to move up and down; The cam mechanism 4 includes a cam mechanism 4 interposed between the base frame and the upper and lower top plates, and an automatic operating device for pushing and pulling the upper top plate 3, and the cam mechanism 4 includes:
A shortened state A in which the upper and lower top plates 3.2 are partially stacked one on top of the other, an extended state B in which the upper and lower top plates 3.2 are adjacent to each other on the same horizontal plane, and a stretched state B in which the upper and lower top plates 3.2 are mutually adjacent to each other on the same horizontal plane. The first spaced apart
, the second overdrawn states C1 and C2 are changed to the shortened state A, the first overdrawn state C1,
The automatic operating device is configured to automatically repeat the extended state B, the second overdrawn state C2, and the shortened state A in this order, and the automatic actuating device converts the rotation of the electric motor M into horizontal linear movement of the upper top plate 3. A telescoping table characterized in that it is comprised of a conversion mechanism J that rotates the electric motor M, and a control circuit that controls forward and reverse rotation of the electric motor M.