JPH018193Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention holds the top plate of a desk, etc., which is in a horizontal state on the main body thereof, by rotating it upward and tilting it at a required angle. The present invention also relates to a table top tilting device for a desk or the like that rotates the top plate in the tilted state downward to return it to its original horizontal state.

[Prior art and its problems] In conventional desks, etc., the top plate is usually installed in a horizontal position, so when drawing, etc., it is difficult to reach toward the depth of the top plate. It was extremely inconvenient to draw the diagram.

For this reason, today, such desks and the like have been devised in which the top plate is tilted.

Here, when tilting the top plate of a desk, etc., conventionally, the top plate is rotatably attached to the main body of the desk, etc., and the top plate is tilted by rotating the top plate upward by hand. Generally, a device in which the top plate is held in an inclined state by, for example, installing a support member between the inclined top plate and the main body has been used. However, in such a device, when tilting the top plate or returning the tilted top plate to its original position, each time, hold the top plate in an inclined position with your hands, etc., and hold the top plate in this state. Insert your hand between the board and the main body,
The support member had to be manipulated, which was very troublesome to operate, and there was also the risk of getting one's hand caught between the top plate and the main body.

In addition, conventionally, such a desk, etc. has one end of an inclined rod attached to the back surface of the top plate so as to be slidable in the vertical direction.
The other end is inserted into the sliding rod, one end of the support rod is inserted into the middle of the inclined rod, and the other end is inserted into one corner of the movable stopper, forming a substantially triangular shape and each rotatable. By moving the movable stopper back and forth, the angle of the tilting rod changes and the inclination of the top plate placed on it is also changed.This movable stopper has a pair of pins that sandwich the slider from above and below at an interval slightly wider than the width of the slider. The spring installed in one corner tilts backwards, and the sliding rod is pressed by both pins, making it possible to move only in the forward direction, but the stopper can be released by pressing the moving stopper from below to keep it horizontal. There was one in which the movable stopper could be moved backwards by operating a bar, and furthermore, a release slider to keep it horizontal enabled continuous upward movement (Utility Model Publication No. 120333/1983). However, in this desk, a spring is installed to prevent the top from falling suddenly when the stopper release bar is operated to lower the top, but this spring prevents the top from becoming level. There is. Furthermore, this tilting device has a complicated structure and is easily broken.

In addition, as a similar desk, an operating shaft is rotatably attached to a top plate that is rotatably attached to the front side of the main body, and by rotating this operating shaft, a nut screwed into the threaded part of the operating shaft is inserted. There was a device in which the top plate was slid and rotated up and down on the front side of the main body via a crank mechanism.
issue). However, in such a desk, the top plate must always be rotated by rotating the operating shaft, which is very inconvenient.

[Means for Solving the Problems] The top tilting device for a desk or the like of the present invention allows the top 10 to rotate in a desk or the like in which the top 10 is rotatably attached to the front side of the main body 20. An operating shaft 30 having a threaded portion 31 formed at a predetermined position is rotatably mounted on the main body 20 along the depth direction of the main body 20 attached to the main body 20. Nut 40 with a release function,
The nut 4 is screwed together so as to slide back and forth in the depth direction along the operating shaft 30, and has a screw release function.
A crank mechanism 50 for converting the sliding movement of the nut 40 into rotation of the top plate 10 is provided between the top plate 10 and the top plate 10, and the nut 40 with a thread release function is rotated upward on the top plate 10. It is installed so that the threaded connection can be released by applying force in the direction of the screw.

[Operation] In the top plate tilting device for a desk or the like configured as described above, the top plate is tilted from a horizontal state in the following manner.

When a force is applied to the top plate 10 to rotate it upward,
The force applied to the top plate 10 is transmitted to the nut 40 with a thread release function via the crank mechanism 50. If the direction of the force transmitted in this way matches the direction in which the unscrewing function of the nut 40 acts, and a force above a certain level is applied in that direction, this will cause the threaded portion to The nut 40, which had been screwed into the threaded part 31, releases the threaded state from the threaded part 31 and begins to slide along the operating shaft 30 without engaging the threaded part 31, and the top plate 10 It is designed to rotate upward. When the application of such force to the top plate 10 is stopped, the nut 40, which had been unthreaded from the threaded portion 31, engages with the threaded portion 31 and stops at that position, and the top plate 10 is maintained in that state.

Next, to make the top board horizontal, do the following.

When the operating shaft 30 mounted on the main body 20 is rotated in either direction, the nut 40 with a thread release function screwed onto the threaded portion 31 of the operating shaft 30 is rotated along the operating shaft 30. This sliding movement of the nut 40 is converted into a rotational movement of the top plate 10 by the crank mechanism 50, and the top plate 10 slowly rotates downward. I come to do it. When the rotation of the operating shaft 30 is stopped, the nut 40 stops at that position while being screwed into the threaded portion 31 of the operating shaft 30, and the crank mechanism 50 stops moving. The plate 10 is now held in a horizontal state.

[Example] Hereinafter, an example of this invention will be described in detail based on the drawings.

In this embodiment, as shown in FIG. 3, an example is shown in which the device is used in a desk 1 on which a shelf 2 is placed on the back side.

In the desk 1 shown in this embodiment, in order to place the shelf 2 on the back side thereof, the top plate 10 placed on the main body 20 of the desk 1 is placed on the main body 20 on the back side in order to place the shelf 2 thereon. The top plate 10 is separated from the fixed top plate part 11 fixed on the main body 20, and the separated top plate 10 is rotatably attached to the main body 20 and the front side thereof by a hinge 3 or the like.

The upper surface part 21 of the main body 20 to which the top plate 10 is attached in this way is formed lower than the mounting part 22 on which the top plate 10 is placed, in order to accommodate a device for rotating the top plate 20. On top of the upper surface part 21,
An operating shaft 30 extending in the depth direction, that is, from the front side to the back side, is rotatably attached. As shown in FIGS. 1 and 2, this operating shaft 30 has a threaded portion 31 formed on its back side, while its front end 32 is connected to the front plate portion 2 of the main body 20.
The actuating shaft 30 is protruded outward from the lead-out portion 24 formed in the section 3, and is formed into a prismatic shape in order to rotate the actuating shaft 30 with a clamp or the like.

A nut 40 with an unscrewing function is screwed into the threaded portion 31 of the actuating shaft 30, and the nut 40 has an unscrewing function that releases the screwing when a force above a certain level is applied in a predetermined direction. , along with this,
This nut 40 is adapted to slide back and forth in the depth direction along the operating shaft 30. In this embodiment, in order to prevent the nut 40 from rotating together with the operating shaft 30, guide holes 61 extending in the depth direction are provided on both sides of the nut 40, as shown in FIGS. 1 and 2. A supporting rod 41 is provided with a formed guide member 60 and extends from the nut 40 on both sides.
are inserted into the guide holes 61 of these guide members 60,
This prevents the nuts 40 from rotating together, and also prevents the nuts 40 from rotating together.
0 slides along these guide holes 61 without wobbling.

Here, the nut 40 with a screw release function is the fourth one.
As shown in the figure and FIG.
This nut part 42 is accommodated in a housing part 44 which is formed into a tapered shape in the same way as the nut part 42 within the frame body 43 of the nut 40, and a pin 45 provided in each nut segment 42a. is inserted into a slot 46 provided in the accommodating part 44, and the nut part 42 slides inside the accommodating part 44 along this slot 46. A spring 47 is disposed to bias the nut portion 42 toward the smaller diameter side.

As shown in FIGS. 4 and 5, the nut portion 4
The nut 40 is screwed onto the threaded portion 31 so that the taper of the nut 40 contracts toward the front side, and when a force is applied to pull the nut 40 toward the front side in this state, the threaded portion 31 is screwed. As shown in FIG. 4, the fitted nut portion 42 moves toward the larger diameter side against the biasing force of the spring 47, and each nut segment 42a expands, thereby causing the nut portion 42 and the screw The threaded engagement with the portion 31 is released, and the nut 40 is adapted to slide toward the front side. Then, when the force that draws the nut 40 toward the front side is released, the biasing force of the spring 47 causes the nut portion 42 to
As shown in FIG. 5, the nut segments 42a are moved to the small diameter side, and each nut segment 42a is contracted to be screwed into the threaded portion 31.

In this way, the nut 40 with a thread release function screwed onto the threaded portion 31 of the operating shaft 30 and the top plate 10
A crank mechanism 50 is provided between the two, and when the nut 40 slides back and forth in the depth direction along the operating shaft 30, the top plate 10 is rotated up and down via the crank mechanism 50. It's getting old.

In this embodiment, as shown in FIGS. 1 and 2, a first arm 51 is attached to the support rod 41 of the nut 40.
is rotatably attached, and a second arm 52 is installed on the front side of the main body 20 from the nut 40 between a fixture 70 attached to the top surface 21 and a support 71 attached to the back surface of the top plate 10, This second
The first arm 51 is connected to the intermediate portion of the arm 52.

Then, as described above, the operating shaft 30 is rotated in the advancing direction of the threaded portion 31, or the top plate 1
Apply upward rotational force to the nut 40,
When the first arm 5 is slid toward the front side along the operating shaft 30, as shown in FIG.
The angle of the connecting portion between the nut 1 and the second arm 52 decreases, causing both the arms 51 and 52 to stand up and rotate the top plate 10 upward.
When the sliding of 0 stops, both arms 51 and 52 are maintained in that state and hold the top plate 10 in an inclined state.

Further, when the actuating shaft 30 is rotated in the backward direction of the threaded portion 31 and the nut 40 is slid toward the back side along the actuating shaft 30, as shown in FIG. Arm 51 and second arm 52
The angle of the connecting part with the arm is widened, and both arms 51, 52
is designed to fall down and rotate the top plate 10 downward.

In addition, in the above configuration, when raising the top plate, it is not only necessary to lift the top plate by hand, but also to lift the top plate by hand.
You can also rotate 0 and raise it.

In this embodiment, the front side end 32 of the actuating shaft 30 is made to protrude outside from the lead-out part 24 on the front side of the main body 20, and the actuating shaft 30 is rotated by a clamp or the like on the front side of the main body 20. Although,
It is also possible to rotate the operating shaft 30 on the side surface of the main body 20 using a bevel gear or the like.

[Effects of the invention] As detailed above, in the top plate tilting device for a desk, etc. according to this invention, the threaded portion of the operating shaft provided in the depth direction on the main body of the desk, etc. is equipped with a thread release function. A nut is screwed together, the nut is slid back and forth in the depth direction along the operating axis, and a crank mechanism provided between the nut and the top plate is used to rotate the top plate up and down. With,
The top plate is held in a state where this nut is stopped at the threaded portion.

Therefore, in the above device according to this invention, the operating shaft is rotated to slide the nut back and forth in the depth direction, thereby making it possible to rotate the top plate in the vertical direction. In particular, when lowering the top, the operating shaft is rotated, so the top does not drop suddenly, and objects placed on the top do not fall or get your hands caught.

In addition, the nut with the screw release function is attached to the threaded part of the operating shaft so that the screw release function is activated by the force in the direction of rotating the top plate upward. The top plate can be easily tilted at the required angle by simply applying a rotational force to The screw connection will not be released, and the top plate will be reliably held in that state.

Furthermore, in such devices, the operating shaft is attached to the main body rather than the top plate, so the operating shaft does not tilt as the top plate tilts, unlike in conventional devices. The shaft can be easily rotated.

[Brief explanation of the drawing]

The drawings all show embodiments of this invention.
The figure is a partial sectional view with the top board horizontal, Figure 2 is a partial sectional view with the top board tilted, Figure 3 is a perspective view of the desk with the top board tilted, and Figure 4 5 is a partial cross-sectional view of the nut with a thread release function and the threaded portion of the operating shaft in a state where the threaded connection is released, and FIG. FIG. Explanation of symbols, 10...Top plate, 20...Main body, 3
0... Operating shaft, 31... Threaded portion, 40... Nut with screw release function, 50... Crank mechanism.

Claims (1)

[Scope of utility model registration request] In a desk or the like in which the top plate 10 is rotatably attached to the front side of the main body 20, a threaded portion 31 is formed at a predetermined position along the depth direction of the main body 20 to which the top plate 10 is rotatably attached. the operating shaft 30,
It is rotatably mounted on the main body 20, and a nut 40 with a thread release function is screwed onto the threaded portion 31 of the operating shaft 30 so as to slide back and forth in the depth direction along the operating shaft 30. A crank mechanism 50 for converting the sliding movement of the nut 40 into rotation of the top plate 10 is provided between the nut 40 with a screw release function and the top plate 10, and the nut 40 with a screw release function is connected to the top plate 10. A device for tilting a top plate of a desk or the like, characterized in that the device is mounted so that the threaded connection is released by a force in the direction of rotating the plate 10 upwards.