JPS6345941Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a tabletop tilting device for desks for office use, drafting, etc., more specifically, a tabletop tilting device for adjusting the angle of the tabletop in stages. This invention relates to a tilting device.

[Prior Art] As a means for adjusting the angle of the top plate in stages in a desk, as disclosed in Utility Model Publication No. 5936 of 1920, a longitudinal link rod is used along the side of the leg body. Alternatively, the lower surface of the top plate may be supported by the tip of the link rod by pivoting the middle part of the link rod, or as disclosed in Publication No. 49-42406. A poking rod is rotatably attached to the bottom surface of the board, and is brought into contact with the upper surface of the legs of the poking rod.

However, in the former case, a rod is inserted between the link rod and the leg body, and the weight of the top plate is used to hold the link rod in an inclined state. If the top plate rotated further due to being touched by an object or person, there was a risk that the rod would come off from between the link rod and the legs, causing the top plate to fall.

On the other hand, in the case of the latter type in which the pecking rod is pivotally attached to the underside of the top plate, there is less of a problem of the top plate accidentally tipping over as described above, but when the operator raises and lowers the pecking rod, the operator must touch the top plate and the legs. Since the hands had to be inserted between the legs and the body, there was a risk that the hands would get caught between the legs and the top plate when adjusting the angle of the top plate.

This invention reliably prevents accidents in which a hand gets caught between the top plate and the legs when adjusting the angle of the top plate, and accidents in which the top plate unexpectedly topples due to the tilted state. The aim is to make it as easy as possible.

[Means for solving problems]

In order to achieve this purpose, the present invention provides a desk in which a top plate is supported vertically and vertically by a pair of left and right legs, and longitudinal link rods are provided along the inner surfaces of the upper ends of the left and right legs, respectively. The middle portions of the left and right link rods are pivotally connected to the legs so as to be movable up and down, and locking pins are horizontally protruded from the side surfaces of the ends of the left and right link rods, while the top plate Engagement pieces extending in the front-rear direction are provided on the lower surfaces of both the left and right sides of the link rod and protrude downward, and each of the engagement pieces is provided with a longitudinal long groove hole into which a locking pin at the tip of the link rod is fitted. In addition, an engagement groove is formed in the upper part of the long groove hole in the engagement piece, and the engagement groove is engaged with the locking pin when the top plate is tilted at an appropriate angle, and A left and right horizontally elongated handle is integrally connected between the base end portions in such a manner that the tips of both link rods are constantly urged upward by the weight of the handle.

[Functions and effects of the idea]

With this configuration, the weight of the handle constantly forces the left and right link rods upward so that their tips rotate toward the bottom of the top plate, so when you raise the top plate, it is difficult to touch the handle. Even without,
The locking pins at the tips of both link rods engage with the engagement grooves of the engagement pieces provided on the lower surface of the top plate, and if the raising operation is stopped at a predetermined inclination angle, it will be fixed in that state. In other words, you can raise the top plate with one hand.
Moreover, it can be done with light force.

In addition, by fitting the locking pin projecting horizontally from the tip of the link rod into the long groove hole of the engagement piece on the top plate, the locking pin of the link rod can be disengaged from the engagement piece on the top plate. The positional relationship between the link rod and the top plate will be maintained constant even if the
When tilting the table top from an inclined position to horizontal or changing the angle of inclination, the operator is careful not to put too much force into the hand holding the handle and only the link rod turns violently. In this case, you don't have to pay attention to the amount of force you apply to the handle, you only need to pay attention to the operation of raising and lowering the top plate.
It is extremely easy to tilt the top plate and change the angle.

When tilting the top board or adjusting its angle, the link rods are engaged and disengaged from the top board by moving the handle that extends below the front of the top board up and down. When making changes or folding operations, the operator does not have to get his or her hands caught between the legs and the top plate, and the angle of the top plate can be adjusted easily and safely, and with a light force.

Furthermore, even if a person or object touches the top plate while the top plate is tilted, and the top plate moves to further tilt the top plate, the tips of both the left and right link rods will rotate upward. By being biased in this way, the locking parts at the ends of both the left and right link rods are maintained in a state of being engaged with the top plate, so it is possible to reliably prevent unexpected accidents such as sudden collapse from the top plate or tilted position. become.

Therefore, according to the present invention, it is possible to secure stability by reliably preventing the accident of the top plate falling over unexpectedly, and at the same time, the angle of the top plate can be adjusted extremely easily and safely with a light force.

〔Example〕

Next, an embodiment of the present invention will be described based on the drawings. Reference numeral 1 designates a desk in which a top plate 3 is rotatably supported by a pair of left and right legs 2.

Each of the legs 2 is formed by bending a round pipe into an inverted U-shape, and between the rear inner surfaces of the left and right legs 2 is a rear connecting rod formed of a round pipe in an upward U-shape. On the other hand, an upper connecting rod 5 formed in a substantially U-shape using a square pipe is connected between the upper inner surfaces of the left and right legs 2. The top plate 3 is attached to the front edge of the upper connecting rod 5 via a hinge 6 so as to be vertically movable. A gutter-shaped writing instrument holder 3 is provided on the front edge of the top plate 3.

Note that, as shown in FIG. 2, the legs 2 and the connecting rods 4, 5 are connected by hexagon socket bolts 7, but they may be fixed by welding.

Reference numeral 8 denotes a longitudinal longitudinal link rod disposed along the inner surface of the rearwardly protruding portion 5' of the upper connecting rod 5. ’ is pivotally mounted on pin 9,
A locking pin 10 is provided on the side surface of the distal end thereof to protrude inwardly, and a handle 11 of an appropriate weight is connected between the proximal ends of both link rods 8, and the weight of the handle 11 causes both the left and right link rods 8 to The tip is always urged in the upward rotational direction.

Engagement members 12 are fixed to the lower surfaces of the left and right sides of the top plate 3, respectively, with which the locking pins 10 of the link rods 8 are engaged in the inclined state.

The engaging member 12 has an inverted L-shaped cross section, and its horizontal piece is fixed to the top plate 3 with screws 16, while the vertical engaging piece 13 is provided with a long groove hole 15 in the longitudinal direction. An engagement groove 15 is provided above the elongated hole 15.
Two notches are formed in the top plate 3 so that the locking pin 10 of the link rod 8 can be freely engaged and detached from the engagement groove 14 when the top plate 3 is tilted at an appropriate angle.
It goes without saying that the number of engagement grooves 14 is not limited to two.

In the above configuration, when the top plate 3 is raised from a horizontal state, both the left and right link rods 8 are biased so that their locking pins 10 rotate upward. As a result, the locking pin 10 automatically engages with the engagement groove 14, and the top plate 3 can be fixed at a desired inclination angle with one hand.

In addition, when returning the tilted top plate 3 to the horizontal level or changing the inclination angle, raise the top plate 3 slightly with one hand, and lightly lift the handle portion 11 with the other hand to connect the locking pin 10 and the engagement groove 14. All you have to do is release the engagement. In this case, the locking pin 10 protruding laterally from the tip of the link rod 8 is connected to the long groove hole 15 of the engagement piece 13.
By fitting the link rod 8 into the frame, the tip of the link rod 8 is maintained close to the bottom surface of the top plate 3, so as long as the handle 11 is lifted up, it will not engage regardless of how much force is applied to the handle 11. Since the stop pin 10 is disengaged from the engagement groove 14 and the tip of the link rod 8 is held close to the bottom surface of the top plate 3, the operator should be careful about how much force is applied to the handle 11. The user only has to pay attention to the tilting movement of the top plate 3 without having to pay attention to the tilting movement of the top plate 3, and the tilting operation and angle changing operation of the top plate 3 can be easily performed without using one's nerves.

Even if the tilt angle becomes larger due to something touching the tilted top plate 3, the locking pins 10 of both link rods 8 are biased upward. Since the locking pins 10 of both link rods 8 are maintained in the engaged state with the engagement grooves 14, an accident in which the top plate 3 falls down unexpectedly can be reliably prevented.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of a desk, Fig. 2 is a partially cutaway plan view of the desk, Fig. 3 is a sectional view taken from - in Fig. 2, and Fig. 4 is a link rod. It is a perspective view seen from below. 1... Desk, 2... Legs, 3... Top plate, 5... Upper connecting rod, 8... Link rod, 10... Locking pin,
11...handle, 12...engaging member, 13...
Engagement piece, 14... Engagement groove, 15... Long slot.

Claims (1)

[Scope of utility model registration request] In a desk in which a top plate is supported by a pair of left and right legs so as to be movable up and down, longitudinal link rods are disposed along the inner surfaces of the upper ends of the left and right legs, respectively, and the link rods are The middle portions are pivotally connected to the legs so as to be vertically movable, and locking pins are provided to protrude laterally from the side surfaces of the ends of the left and right link rods, and
Engagement pieces extending in the front-rear direction are provided on the lower surfaces of both left and right sides of the top plate to project downward, and the engagement pieces have longitudinal longitudinal slots into which the locking pins at the tips of the link rods are fitted. At the same time, a notch is formed in the upper part of the long slot in the engagement piece to engage the locking pin when the top plate is tilted at an appropriate angle; A desk characterized in that left and right horizontally elongated handles are integrally connected between the base ends of the link rods in such a way that the ends of both link rods are constantly urged upward by the weight of the handles. Top plate tilting device.