JPS5822576Y2 - drafting table equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drafting table device that allows both drafting work using a drafting board and other related desk work to be performed efficiently in a narrow space.

As is well known, drafting work using a drawing board requires desk work such as calculation work, writing work, and reading reference books. In places where the space per person is small, it is physically difficult to install a dedicated desk for task work in addition to a drafting table.

Also, when looking at the - worker, when he or she is working on a drawing at a drawing board, he or she is not sitting at a desk and engaging in associated tasks, and vice versa.

Therefore, it is desirable that both the state of using a drawing board and the state of using a desk be possible within a narrow space, and that these two states can be smoothly switched without requiring any effort.

In view of the current situation, the purpose of the present invention is to provide a compact drafting table device that is equipped with a drafting board and a desk dedicated to task work, and is suitable even for narrow spaces.

Another object of the present invention is to provide a drafting table apparatus equipped with a simple balancer mechanism that ensures smooth upward and downward movement of a drawing board support frame supporting a heavy drafting table and drawing machine.

In order to achieve these objects, the present invention pivots the respective base ends of at least two support rods to the rear and both sides of the drafting table base with their positions shifted in the front and back direction, and Each tip is pivotally connected to the connecting rod via each pivot part, and the drawing board support frame is pivotally supported via one of the pivot parts located in front of each of these pivot parts, A torsion coil spring is provided between each base end of the support rod located on at least one side of each of the support rods and the drafting table base portion for imparting an elastic force in a direction in which the support rod stands upright. Moreover, each of these torsion coil springs is locked so that the locking ends to the drafting table base are facing each other with the locking ends to the drafting table base sandwiching the locking shaft provided on the drafting table base. The summary is what we did.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 9.

Figure 1 shows a state in which the drawing board is stored in a non-drafting work position and desk work is possible on the desk, and Figure 2 shows a state in which the drawing board is placed in a drafting work position and desk work is not possible on the same side of the desk. ing.

As shown in FIG. 1, the drafting table base portion 2 of the drafting table device 1 has foot portions 3 on both sides extending in the depth direction, and each foot portion has a side plate 4. A desk section 5 is supported.

The desk part 5 has a desk top plate 6 arranged in a planar manner on the upper part, and has drawer frames 7 on both sides of the desk top plate 6.

A drawer 8 is fitted between the drawer frames 7 on both sides so as to be movable in the depth direction.

On both sides of the rear portion of the drawer frame 7 in the depth direction, support rods 9, 10, 11 and 12 of the same length are provided with base ends 9a, 11 and 12, respectively.
10a, lla, and 12a are each pivotally connected to the drawer frame 7 so as to be pivotable.

These support rods 9, 10, 11 and 12 do not need to be of the same length to achieve their purpose.

This pivot structure is explained as follows. That is, as shown in FIG. 3, short pipes 13 and 14 are welded to one side of the drawer frame 7, respectively.

A similar short pipe 13.
14 is fixed.

Total of 4 short pipes 15 to these pipes 13.14
．． 16 are fitted into each other so as to be rotatable.

The two pipes 15 are welded to the base end 9a of the support rod 9 and the base end 11a of the support rod 11, respectively, and the two pipes 16 are welded to the base end 10a of the support rod 10 and the base end 11a of the support rod 1.
The base ends 12a of 2 are welded to each other.

Pipes 15.16 welded to the base ends 9a, 10a are provided with pins 17.18 as hooking members.
A torsion coil spring 19 is wound around the outside of the pipe 13 into which the pipe 15 is inserted, and a torsion coil spring 20 is wound around the outside of the pipe 14 into which the pipe 16 is inserted. ing.

One end 19a of the torsion coil spring 19 is hooked to the upper and rear side of the pin 17, and one end 20a of the torsion coil spring 20 is hooked to the upper side and rear side of the pin 17.
is hooked to the lower and front side of the pin 18.

Further, the other end 19b of the torsion coil spring 19 is connected to the pipe 13.
．． The other end 20b of the torsion coil spring 20 is latched to the lower side of a locking shaft 21 provided on the drawer frame 7 at a position between 14 and 14. He was arrested in front of.

That is, the elastic forces of the torsion coil springs 19 and 20 both act in the direction of raising the support rods 9 and 10, and function as a balancer when the drawing board support frame 25 is switched between the use position and the storage position.

At the same time, torsion coil springs 19 and 2 are attached to the locking shaft 21.
The spring forces of 0 and 0 act through these other ends 19b and 20b so as to cancel each other out.

In this way, the balancer mechanism is extremely compact, and no excessive force is applied to other parts of the drafting table base 2.

Base end 11a of support rod 11 and base end 12a of support rod 12
Also, a torsion coil spring (not shown) is a torsion coil spring 19.
The support rods 9 and 11, which may be arranged in the same positional relationship as the support rod 20, are placed on the front side when viewed from the operator, and the support rod 10 is placed on the rear side at a certain distance from the support rod 9. Furthermore, the base end 10a is located slightly above the base end 9a.

The positional relationship of the support rod 12 with respect to the support rod 11 is also the same as that of the support rod 1.
The positional relationship with respect to the support rod 9 of 0 is the same.

Since the base end 10a is pivoted at a position slightly above the base end 9a, as shown in FIG.
Even when the support rods 5 are placed substantially parallel to the desk top 6, a space is maintained between the support rods 9 and 10.

A stopper 7a is provided on the front side of the drawer frame 7 on both sides, protruding laterally and outward from the drawer frame 7.
is installed.

As can be seen from FIG. 2, this stopper 7a prevents further downward rotation of the support rods 9, 11 during drafting work, and supports the weight applied to the drawing board support frame 25. .

The tips 9b and 10b of the support rods 9 and 10 are connected to pivots 23a and 24 at both ends 22a and 22b of the connecting rod 22, respectively.
are pivotally connected via a.

The pivot portion 23a pivotally connects the support rod 9 and the connecting rod 22, and also connects the drawing board support frame 25 and the connecting rod 22 via a large number of inclination adjustment plates 26 of this drawing support frame 25. Pivotably coupled.

The pivot portion 24a merely pivotably connects the support rod 10 and the connecting rod 2z.

As shown in FIG. 6, at the tip 11b of the support rod 11,
A plurality of brake plates 29 are fixed by pins 30 and 31, each having a disk portion 27 at the top and a mounting portion 28 at the bottom.

The mounting portion 28 is inserted into the support rod 11, and
A spacer 32 is inserted between each brake plate 29 in this mounting portion 28 .

On the other hand, a large number of disc parts 27 protrude upward from the tip 11b and are arranged in parallel with each other at regular intervals.

Also on one end 22a of the connecting rod 22, a disk portion 33 and a mounting portion 3 are attached.
A plurality of brake plates 35 having a diameter of 4 are fixed by pins 36,37.

One end of the mounting portion 34 (the portion connected to the disk portion 33) protrudes from the connecting rod 22.

As shown in FIG. 6, the inclination adjustment plates 26 are alternately combined with brake plates 29 and 35.

As shown in FIG. 9, this inclination adjustment plate 26 has a stopper shoulder 38 on its rear edge and lower side.

This stopper shoulder portion 38 engages with the lower edge of the mounting portion 34 of the brake plate 35 when the drawing board support frame 25 rotates excessively close to the support rods 9 and 11. It acts to prevent further rotation.

Further, the inclination adjusting plate 26 is attached to the front side and side portion of the drawing board support frame 25 via a large number of spacers 39.

One pipe 40 is welded between the pivot portion 23a and the pivot portion 23b.

A pipe 41 is further inserted coaxially inside this pipe 40.

The pipe 41 supports the support rod 9 at the pivot portion 23a so as to be able to move slightly in the width direction of the board support frame 25 by means of an outer nut 42.

The brake cam 4 is connected to one end 41a of the pipe 41 by a pin 43a fitted in the horizontal axis direction of the pipe 41.
3 is pivotally mounted.

This brake cam 43 is an eccentric cam, and is separated from a brake arc surface portion 44 and a release plane portion 45.

On the other hand, a pipe 46 is also welded between the pivot parts 24a and 24b, and a pipe 47 is coaxially inserted into the pipe 46.

In this pivot portion 24 b, the tip 12 of the support rod 12
b and the other end 22 of the connecting rod 22. A brake plate 29 is provided at the other end 22b of the connecting rod 22.
A brake plate 48 having a similar shape is fixed to the support rod 12.
A thick spacer 4 made of an elastic material is provided between each two brake plates 48 disposed on both sides of the connecting rod 22 and on both sides of the connecting rod 22.
9 is inserted.

A brake cam 50 having the same shape as the brake cam 43 is pivotally attached to one end 47a of the pipe 47 by a pin 51a.

A U-shaped brake cam operating handle 51 is disposed between the brake cams 43 and 50, and the brake cam 4
3 and 50 are integrally locked and unlocked.

In other words, in the locked state where the brake is operating,
The brake cam operating handle 51 hangs parallel to the support rod 11.12 and is pivoted up to approximately the same height as the connecting rod 22 in the released state when the brake is not operating.

Near the tips 10a and 12a of the support rods 10 and 12,
Two pivot brackets 52 are provided, and a rod-shaped stopper 53 for regulating the inclination angle of the drawing board support frame 25 is pivoted to these pivot brackets 52.

A sliding opening 54 is provided in the axial direction of this rod-shaped stopper 53, and a cover member 55 that comes into contact with the rear surface of the drawing board support frame 25 is disposed at the tip.

A pin member 56 that slides within the slide opening 52 in response to rotation of the support rods 9, 10 and 11, 12 is disposed approximately at the middle of the connecting rod 22.

As the support rods 9, 10, 11, and 12 gradually rise from their maximum position in front of the desk portion 5, the rod-shaped stopper 53 gradually protrudes toward the front, and the cover member 55 While abutting against the rear side of the drawing board support frame 25, the drawing board support frame 25 is prevented from falling excessively backward in the depth direction.

This rod-shaped stopper 53 allows the support rods 9, 10.1
1 and 12 stand completely perpendicular to the desk top 6, the inclination angle of the drawing board support frame 25 is regulated to approximately 45° or more, and the upper end 25a of this drawing board support frame 25 is Board 6
Since it does not protrude further rearward than the trailing edge 6a,
For example, the drafting table device 1 does not collide with walls, windows, etc. located behind and above it.

On the other hand, as shown in FIG.
When the rod-shaped stopper 53 is located in the space formed between the support rods 9 and 10 and the support rods 11 and 12, the cover member 55 at the tip thereof is does not collide with the drawing board support frame 25.

As shown in FIGS. 3 and 4, the pivot parts 23 a and 2
3b is wound with torsion coil springs 57 and 58 for supporting the weight carried by the drawing board support frame 25.

One end 57a, 5g of these torsion coil springs 57, 58
a is hooked on a pin member 56, and the other end 57b, 58
b is hung on two spring force adjustment plates 59 provided on the rear side of the drawing board support frame 25.

As shown in FIG. 5, this spring force adjustment plate 59 has a U-shaped groove 61 formed therein, and a weak position 63 located at a high position.
It is possible to switch between two positions: and a strong position 64 located at a low position.

Hereinafter, the manner of use of the above-mentioned drafting table device 1 will be explained.

First, in the first state, the support rods 9, 10, 11, and 12 are upright with respect to the assembly part 5, and the brake cam operating handle 51 is suspended parallel to the support rods 11 and 12. .

At this time, the brake arc surface portion 44 of the brake cam 43 is pressed against the side surface of the connecting rod 22, and the brake plates 29, 35 and the inclination adjustment plate 26 are tightened together, so that the support rod 11.
The brake acts on the parallel link mechanism constituted by the support rods 9, 10 and the connecting rod 22, and the parallel link mechanism constituted by the support rods 9, 10 and the connecting rod 22, so that the support rods 9, 10.1
1 and 12 are fixed in an upright position, and at the same time, the inclination of the drawing board support frame 25 is maintained at approximately 45 degrees.

At this time, also in the pivot portion 24b, the brake cam 50
The braking arc surface portion is pressed against the side surface of the connecting rod 22, tightening the brake plates 48 to each other, fixing the support rods 11, 12, and further increasing the braking effect at the pivot portion 23b.

At this time, the torsion coil springs 19 and 20 are in the positional relationship shown in FIG.

As described above, when the brake cam operating handle 51 is rotated upward to approximately the same height as the connecting rod 22 from the state in which the drawing board 65 is stored on the rear side and above the assembly section 5, the support rod 11.
12 and the connecting rod 22, the brake is released and the drawing board support frame 25' is also free to tilt.

Therefore, when the operator grasps the brake cam operating handle 51 and pulls it toward the user, the support rods 9, 10, 11, and 12 rotate toward the front around the base ends 9a, 10alla, and 12a, and rotate. At the end of the support rods 11 and 9 abut against the stopper 7a.

At this time, the inclination of the drawing board support frame 25 is fixed by rotating the brake cam operating handle 51 downward again and hanging down to a position parallel to the support rods 11 and 12.

During this time, the pin 17 that locks one end 19a of the torsion coil spring 19 and the pin 18 that locks one end 20a of the torsion coil spring 20 are displaced to the position shown in FIG. 4 as the support rod 9°10 rotates. .

The balancer mechanism using the torsion coil springs 19 and 20 acts to reduce the weight supported by the drawing board support frame 25 when the drawing board support frame 25 moves upward;
5, the drawing board support frame 25 acts to prevent the drawing board support frame 25 from falling suddenly toward the front, and smoothes the upward and downward movement operations of the drawing board support frame 25.

Also, during this time, the rod-shaped stopper 53 is attached to the drawing board support frame 25.
The drawing board support frame 25 is supported so as not to rotate rearward while being in contact with the rear side surface of the drawing board support frame 25.

When the support rods 9, 10, 11, and 12 are rotated to the front of the assembly part 5, the rod-shaped stopper 53 has already been attached to the drawing board support frame 2.
Since it is not in contact with the back side of 5, the pivot portion 23 b
, 24b, it is also possible to change the inclination of the drawing board support frame 25 while the brake is released.

Also, while the support rods 9, 10, 11, and 12 are being rotated, the pivot portion 23b,
Apply the brake to 24b and remove the support rods 9, 10, 11 and 1.
The drafting table 65 may be used by fixing the inclination of the drawing plate support rod 25 at the same time as the parallel link by 2.

As described above, according to the present invention, when the drawing board support frame is fixed in front of the assembly section dedicated to desk work to facilitate drafting work, and other types of work are done, the drawing board support frame can be fixed on the desk of this drawing board support frame. Both working states can be efficiently switched within a narrow space because the machine is stored so as not to protrude backwards beyond the top plate, and this switching state is carried out smoothly by a compact balancer.

[Brief explanation of drawings]

1 and 2 are perspective views of the drafting table device of the present invention, in which FIG. 1 shows the drawing board support frame stored in the rear part of the assembly section, and FIG. 2 shows the drawing board support frame. The frame is shown set on the front side of the assembly section. Fig. 3 is a longitudinal cross-sectional view of the drawing table device showing a state in which the support rods are vertically raised, corresponding to the state in Fig. 1, and Fig. 4 is a longitudinal sectional view of the drawing board support frame with the support rods tilted almost horizontally. 5 is a vertical cross-sectional view of the drafting table device showing a state in which the
The figure is a cross-sectional view showing the structure of the brake mechanism and the balancer for the support rod. Figure 6 is a cross-sectional view showing the brake mechanism that can be used as both a drawing board support frame and support rod. FIG. 8 is a side view of the brake mechanism, FIG. 8 is a cross-sectional view showing the brake mechanism of the support rod and the connecting rod, and FIG. 9 is an explanatory cross-sectional view showing the engagement relationship between the inclination adjustment plate and the connecting rod. 1...Drawing table device, 2...Drawing table base, 9, 10.11 and 12...Support rod, 9
a, 10 a, 11 a and 12 a...base end, 9 b, 10 b, 11 b and 12 b...
・Tip, 17.18...Pin, 19.20...
...Torsion coil spring, 19a20a...
One end of the torsion coil spring, 19 b, 20 b...
...Other end of torsion coil spring, 21...Lock shaft,
22...Connecting rod, 22a, 22b...
Both ends of the connecting rod, 23 a , 23 b , 24 a and 2
4 b...Pivotal branch, 25...Drawing support frame.

Claims (1)

[Scope of utility model registration request] The respective base ends of at least two support rods are pivoted to the rear and both sides of the drafting table base section with their positions shifted in the front and back direction, and the tips of these support rods are connected to the connecting rods via the respective pivot parts. The board support frame is pivotably supported through one of these pivots located in the front, and at least one side of each of the support rods is A torsion coil spring is provided between each base end of the support rod located at the base of the drafting table and the base of the drafting table to provide elastic force in the direction in which the support rod stands upright. A drafting table device characterized in that the locking ends to the base portion are locked facing each other across locking shafts provided on the drafting table base portion.