JPS5810091B2 - drafting table - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drafting table in which tilting of the drawing board and adjustment of the height of the table are performed by a single operating rod.

Conventionally, in a manual drafting table, the inclination and height of the drawing board are adjusted by an operating rod and a bundle, respectively.

An object of the present invention is to provide a drafting table in which the inclination and height adjustment of the drawing board can be performed using a single operating rod.

In order to achieve this object, the present invention has an on-off valve in a fluid-sealed tube cylinder, and this on-off valve allows the body piston that communicates and cuts off the upper and lower pinuton chambers to slide freely. The pinuton rod of the fluid pressure cylinder is provided with a pinuton rod that is tightly fitted into the body piston and has a bushing rod for operating the opening/closing valve. An angle adjustment plate is fixed to a drawing board holder that is tiltably supported on a support base plate fixed to the base plate, and a brake disc that is supported by the support base plate in a vertically immovable manner is combined with this angle adjustment plate,
The gist is that the bushing rod and the brake disc are operated by the same operating lever.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 12.

In FIG. 1 showing the entire drafting table 1, a fixed frame 3 is installed on a base 2, and a movable frame 4 is fitted into the fixed frame 3 so as to be freely movable up and down.

A support base plate 6 to which a drawing board holder mechanism 5 is attached is fixed to the upper end portion of the movable frame 4.

A brake shaft 7 and a reinforcing shaft 8 are attached to pass through this support base plate 6 in the left-right direction.

As shown in FIG. 6, a pair of brake pipes 9 and 10 are fitted into the brake shaft 7 on both sides of the support base plate 60.

The brake pipe 9 is welded to the support base plate 6, and the brake pipe 10 is free to move relative to the support base plate 6.

The drawing board holder 5 has side frames 11, 12 formed by square pipes on both sides.

This side frame 11.12 has these side frames 11
．． An angle adjusting plate 13.14 projecting downward from 12 and a bracket 15.16 projecting horizontally are attached.

The angle adjustment plates 13 and 14 have elongated holes 17 that form part of an arc,
1B is bored, and the brackets 15 and 16 pass through the long holes 17 and 18, and both ends 7a and 7b of the brake shaft 70 are tightened and fixed by two nuts 19 and 20, respectively. There is.

Similarly, the reinforcing shaft 8 has brackets 1 at both ends.
5, 16 are welded.

Therefore, when tilting or leveling the drawing board holder 5, the entire drawing board holder 5 rotates using the reinforcing shaft 8 as a co-rotating pivot, and the angle adjustment plates 13 and 14 are forced upwardly or horizontally by the brake shaft 7. Move downward.

A brake disc (not shown) is held between the angle adjustment plate 13 and the bracket 15, and a brake disc 21 is held between the angle adjustment plate 14 and the bracket 16. Welded brake disc 2
2 and the brake disc 23 welded to the right end portion of the brake pipe 10 in the figure.
4 from both sides.

Here, the mechanism incorporated between the fixed frame 3 and the movable frame 4 will be described below based on FIGS. 3 to 7.

First, as shown in FIG. 3, the movable frame 4 is formed in the shape of a rectangular prism, and a large number (16 in the illustrated example) of rollers 24 are disposed as sliding members on each side of the prism.

These rollers 24 are in contact with each inner side surface of the fixed frame 3 and rotate as the movable frame 4 moves up and down.

An oil cylinder 25 is built in approximately the center of the movable frame 4, and the base end 25a of the oil cylinder 250 is fixed to the cabinet 2. The tip 33a of the piston rod 33 protruding from the oil cylinder 25 is connected to the support base plate. It is fixed at 6.

This situation is particularly clearly shown in FIG.

As the oil cylinder 25, a known cylinder shown in FIGS. 4 and 5 may be used.

Oil is sealed in the tube cylinder 25a of this oil cylinder 25, and is divided into an upper Pierton chamber 27 and a lower Pierton chamber 28 by a body Pierton 26.

The body piaton 26 is provided with a communication hole 29 that communicates the upper binuton chamber 27 and the lower piaton chamber 28, and an on-off valve 30 is sunk into the lower surface 26a of the body piaton 26.

A valve nut 31 of this opening/closing valve 30 is fitted into a vertical hole 32 that is formed around the vertical axis of the body piaton 26 and communicates with the communication hole 29 .

A piston rod 33 extends above the oil cylinder 25, and this piston rod 33 is integrally attached to the body piaton 26.

The piston rod 33 is a hollow body, and a bushing rod 34 is inserted into the piston rod 33 so as to be able to move vertically. 32 and is brought into contact with the valve nut 31.

As can be understood from this explanation, when the bushing rod 34 is pushed down, the valve nut 3
1 to open the on-off valve 30.

When this opening/closing valve 30 opens and the 11 pinuton rod 33 with the bushing rod 34 pressed is pushed down, the opening/closing valve 30 and the communication hole 2 are transferred from the Pierton lower chamber 28.
Since oil can move to the upper Piaton chamber 27 via the Piaton 9, the bottom Piaton 26 moves downward.

When the pressing force acting on the bushing rod 34 disappears and returns to its original position relative to the piston rod 33, the opening/closing valve 30 also returns to its original position, closing the Pierton lower chamber 28 to the communication hole 29.

As a result, the body piaton 26 is locked and cannot move further downwards.

In Fig. 4, piston rod 33 or tube cylinder 25 is shown.
The most extended state is shown from a, and the body piaton 26 is locked in this position.

FIG. 5 shows that the body piaton 26 is unlocked by a pressing force acting on the bushing rod 34, and that the body piaton 26 is moving downward.

In this manner, by the operation of the oil cylinder 25, the movable frame 4 can freely move up and down relative to the fixed frame 3, and can also be stopped at any position and held in that state.

Instead of the oil cylinder 25, a Ganu spring containing N2 Ganu in oil can also be used.

In this case, it is preferable to use a spring with a large spring constant.

Next, adjust the drawing board tilt and height using the same operating lever 3.
The inclination/height adjustment mechanism performed by 5 will be explained based on FIG. 6, FIG. 7, etc.

As shown in FIGS. 1 and 2, the operating lever 35 is disposed on the right side of the drafting table 1 and in front of an operator (not shown).

In this case, as shown in FIG.
38 and 39 etc. are used, so it is always in a fixed position.

One end 36a of a band-like trouble link element 36 is pivotally supported at the right end of the brake pipe 9, and one end 37a of a trouble link element 37 is pivotally supported at the left end of the brake pipe 10.

This trouble link element 37 includes the other end 36b of the trouble link 36 and one end 38a of the band-shaped link element 38.
is supported.

Further, the operating lever 35 is inserted and fixed to the trouble link element 3T.

The other end 38b of the link element 38 is pivotally supported by the other end 39a of an L-shaped link element 39 whose one end 39b is bent upward.

L in an upright positional relationship with respect to this link element 39
One end 40 of a mold-shaped bushing rod operating link element 40
a is pivotally attached to one end 39b of the link element 39.

The Butschrot operating link element 40 is pivotally supported by a fulcrum 42 on a bracket 41 fixed to the support base plate 6.

The other end 40b of the bushing rod operating link element 40 abuts against the tip 34a of the bushing rod 34 to press or release the bushing rod 34.

In FIG. 6, when the operating lever 35 is rotated counterclockwise, the trouble link element 36 cannot be moved laterally, so the brake pipe 10 is moved to the left by the trouble link element 37, and the angle adjustment plate 14 is moved to the left. Brake panel 2
The fix due to 1.23 is canceled.

As a result, the brake shaft 7
The rightward force acting on the brake pipe 9 disappears, and the clamping force between the brake disc 22 attached to the left end of the brake pipe 9 and the brake disc (not shown) between the angle adjustment plate 13 and the bracket 15 disappears. The angle adjustment plate 13 is also released to rotate freely, and the drawing board holder 5 becomes in a state where the inclination can be freely changed using the reinforcing shaft 8 as a rotation support axis.

On the other hand, by rotating the operating lever 35, the link element 38,
39 is also pulled to the right, the bushing rod operating link element 40 is rotated about the fulcrum 42, and the other end 4
0b pushes down the bushing rod 34 to close the opening/closing valve 30.
Leave it open.

As a result, the movable frame 4 is released so that it can freely move up and down relative to the fixed frame 3.

When the operating lever 35 is rotated clockwise, the brake pipe 10 similarly moves to the right, and the angle adjustment plate 14 is pushed to the right and is pinched by the brake discs 21 and 23, and at the same time the brake shaft 7 As a result, the angle adjustment plate 13 is also compressed by the brake disc 22 and the brake disc between the angle adjustment plate 14 and the bracket 150, and the drawing board holder 5 is fixed so that it cannot tilt.

At the same time, the bushing rod 34 is released from the bushing rod operating link element 40, and the movable frame 4 is fixed to the fixed frame 3 so as not to be vertically movable.

In this way, according to this embodiment, the height and inclination of the drafting table 1 can be adjusted simultaneously by one operation of the operating lever 35.

Next, other embodiments according to the present invention are shown in FIGS. 8 to 12.
This will be explained based on the diagram.

In this embodiment, a brake pipe 44 is further fitted on the right end side of the brake pipe 9 so as to be freely rotatable with respect to the brake shaft 7 and the brake pipe 9, and one end 45a of a trouble link element 45 is pivotally supported on the brake pipe 44. has been done.

One end 46a of a trouble link element 46 is pivotally supported at the left end portion of the brake pipe 10.

This trouble link element 46 has a Nutland wire 47
A bracket 48 for mounting and fixing the base end 47a of the
is provided.

The nutland wire 47 has its tip 47b fixed to one end 50a of the bushing rod operating link element 50 via a wire holder 49 provided on the trouble link element 45.

The bushing rod operating link element 50 is pivoted by a fulcrum 51 to a link holder 52 which is fixedly mounted on the support base plate 6 .

The other end 50b of the bushing rod operating link element 50 is in constant contact with the bushing rod 34.

As shown in FIG. 11, the operating lever 35 is guided by a guide plate 53 projecting downward from the drawing board holder 5 so as to be free to move laterally.

The operating lever 35 is guided by a guide elongated hole 54 extending laterally in the guide plate 53.

In this embodiment, the brake pipe 44 to which the trouble link element 45 is attached is separated from the brake pipe 9, so that even when the drawing board holder 5 is tilted, the operating lever 35 is also tilted at the two points in FIG. The state will be as shown by the chain line.

Therefore, the operability of the operating lever 35 is improved compared to the previous embodiment.

The operating lever 35 is maintained at the set position by the stopper pin 55 coming into contact with the brake shaft 7.

Therefore, as shown in FIG. 12, the stopper pin 55 is connected to the brake shaft at a point where the one end 45a, the other end 45b of the trouble link element 45, and the one end 46a of the trouble link element 46 form a straight line, forming a more flat triangular shape. 7, the operation lever 35 can be held securely.

This method of holding the operating lever 35 at the set position using the stopper pin 55 is also adopted in the above-described embodiment in which only the link is used.

As described above, according to the drafting table of the present invention, the tilting of the drawing board, preparation for adjusting the height of the table, and locking can be performed by operating one operating lever.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view showing one embodiment of a drafting table according to the present invention, Fig. 2 is a schematic side view showing how the operating lever is attached, and Fig. 3 is a height of the movable frame and fixed frame of the drawing table. A perspective view showing the adjustment mechanism, and FIGS. 4 and 5 are cross-sectional views of the oil cylinder used to move the movable frame up and down and fix it. In FIG. 4, the Vinton rod is locked at the most extended point. FIG. 5 shows the unlocked state. Fig. 6 is a sectional view of the tilt and height adjustment mechanism of the drafting table, Fig. 7 is a sectional view showing the operating link of the bushing rod of the oil cylinder, and Figs. 8 to 11 show other embodiments of the present invention. , Fig. 8 is a partial sectional view of the inclination and height adjustment mechanism of the drafting table, Fig. 9 is a sectional view showing the operating link of the bushing rod of the oil cylinder, and Fig. 10 is a partial sectional view showing the operation link of the bushing rod of the oil cylinder. Indicates a state under tension. FIG. 11 shows the state in which the operating lever is attached when the drawing board holder is tilted. FIG. 12 is a plan view showing the stopper of the operating lever. 1... Drafting table, 3... Fixed frame, 4... Movable frame, 5
... Drawing board holder, 6... Point support plate, 13° 14... Angle adjustment plate, 21, 22. 23... Brake disc, 25... Oil cylinder, 25a... Tube cylinder, 26... Body pinuton, 27... Pinuton upper chamber, 28... Piston lower chamber, 30...
Opening/closing valve, 33...Pinuton rod, 34...Bushion rod, 35...Operation lever.

Claims (1)

[Claims] 1 A body piston, which has an on-off valve and which communicates and shuts off between the upper chamber of the pinneton and the royal house, is slidably and tightly fitted into a fluid-sealed tube cylinder, and the above-mentioned on-off valve is fitted onto this body piston. The pinuton rod of the hydraulic cylinder is equipped with a pinuton rod equipped with a bushing rod for operating the movable frame.The pinuton rod supports the movable frame with respect to the fixed frame so that it can freely move up and down and stop, while the movable frame can be tilted to a support plate fixed to the upper end of the movable frame. An angle adjustment plate is fixed to a drafting table holder that is supported so that
A drafting table in which the angle adjustment plate is combined with a brake disc supported by the support base plate so as not to be able to move up and down, and the bushing rod and the brake disc are operated by the same operating lever.