JPS5851789Y2 - drafting table - Google Patents

Description

[Detailed description of the invention] This invention is a drafting table that is configured to independently adjust the dimensions of the angle adjustment plate held by the brake plates in the width direction without being affected by dimensional errors in the width direction of the drawing board frame. Regarding.

Generally, a brake mechanism for holding the drawing board frame at a tilted position at a predetermined angle is associated with the drawing board frame of a drafting table via an angle adjustment plate attached to the drawing board frame. Accordingly, the drawing board frame is tightened through a brake plate and an angle adjustment plate. Therefore, even if there is a dimensional error in the position when installing the drawing board frame due to manufacturing errors in the drawing board frame, a certain brake is applied. In order to obtain force and hold the drawing board frame in the correct tilted position, it is necessary to make the interval between the angle adjustment plates held by the brake plates adjustable.

However, the conventional angle adjustment plate was fixed to both sides of the drawing board frame with screws, etc., and a fixed length support part was fixed between the fixed angle adjustment plates with screws, etc. In case of manufacturing dimensional errors,
Even if you choose to install this angle adjustment plate, since the above-mentioned support part is not telescopic, it is not only difficult to install it, but also because of the brake mechanism that holds this angle adjustment plate.
When performing a brake operation, there is a noticeable difference in the strength of the braking force, and when mounting the drawing board frame due to manufacturing errors in the drawing board frame, dimensional errors in the position have an extremely large effect on the braking force. Met.

Furthermore, if the dimensional error in the position of the mounting of the drawing board frame caused by the manufacturing error force of the drawing board frame is extremely large, it becomes impossible to attach the brake mechanism to the drawing board frame.

1 and 2 are a perspective view of a drafting table having such a conventional configuration and a partially cutaway front view of the angle adjustment mechanism, in which 1 is a support base of the drafting table, and 2 is this support base. This is a support stand that stands upright, and a lift table 3 that can be raised and lowered is inserted into the support table 2. By stepping on a pedal 4 attached to the bottom of the support table 2, the lift table 3 can be moved relative to the support table 2. It is constructed so that it can be raised.

On the other hand, 5 is an angle adjustment mechanism, and as detailed in FIG. Brake plates 9, 10 and 11.12 are provided which extend through the plate and clamp the angle adjustment plates 6, 7.

Further, 13 is a brake pipe which is passed through the brake shaft 8 between the two angle adjustment plates 6.7, the negative end is abutted against the brake plate 11, and the other end is screwed with a double neck (14.15). .

16 and 17 are double nuts screwed onto the left end of the brake shaft, and 18 is a brake lever rotatably attached to a pin 19 implanted at the right end of the brake shaft; A cam portion 20 having different diameters is formed around the pin 19, and this cam portion 20 is pressed against the brake plate 12.

Further, reference numeral 21 denotes a support portion whose tip is bent, which is interposed between the angle adjustment plates 6 and 7, and fulcrum pins 22 and 23 are passed through the support portion 21 from both ends of the angle adjustment plates 6 and 7. 24.25, and the support portion 21 is rotatably attached to both the angle adjustment plates 6 and 7.

Further, the brake pipe 13 and the support portion 21 are fixed to the lifting platform 3 by a known method.

On the other hand, the angle adjusting plates 6, 7 are fixed to the left and right drawing board frames 29, 30 by screws 26, 27, 28, as shown in FIG.

Therefore, in the drafting table having such a configuration, when the brake lever 18 is rotated in the direction of the solid arrow A, the cam portion 20 is rotated and the brake shaft 8 between the brake plate 12 and the pin 19 is rotated. The stroke changes and it deviates to the left, and the clamping force via the double neck (16.17) is released and the brake loosens, causing the angle adjustment plates 6, 7 to move relative to the brake pipe 13 through their elongated holes 5a, 7a.

Therefore, the inclination angle of the drawing board frame can be arbitrarily set by the sliding movement, and by rotating the brake lever 18 again in the opposite direction to the above-mentioned direction, both angle adjustment plates 6, 7 and hold the set state.

By the way, the above-mentioned angle adjustment plates 6.
7 are attached at constant intervals.

However, as mentioned above, manufacturing errors almost always occur in the drawing board frames 29 and 30.

Therefore, when installing the drawing board frames 29 and 30, there is a dimensional error in the position, and the brake pipe 1 is individually adjusted according to the error.
(Double Nara for 3) 14. The screwing condition of 15 must be adjusted.

However, as mentioned above, since the support portion 21 is attached at a certain distance between the angle adjustment plates 6 and 7, the size of the drawing board frame 29, 30 is relatively different in the width direction. In this case, it is difficult to adopt an angle adjustment mechanism, and even if it could be adopted, there would be a noticeable difference in the hardness or softness of the braking action, and the present invention would not be able to provide a brake mechanism with uniform braking action. This was developed in view of the drawbacks of the conventional technology, and in particular, the support base, the support stand erected on the support base, the lifting platform that can be raised and lowered with respect to the support stand, and the angle of the lifting stand. a pair of drawing board frames attached via an adjustment mechanism, and the angle adjustment mechanism includes a pair of angle adjustment plates;
A brake rod is fixed to the lifting platform and fitted into a guide hole formed in each of the angle adjustment plates, and an adjustment plate support member is extendably arranged between each of the angle adjustment plates. By providing a long hole in one or both of the above-mentioned drawing board frames and each of the above-mentioned angle adjustment plates so that their relative mounting positions can be adjusted arbitrarily, the manufacturing errors of the drawing board frames can be avoided. When installing the drawing board frame, it is possible to complete an angle adjustment mechanism that absorbs dimensional errors in position and can accommodate any width dimension of the drawing board frame, thereby creating a new technology that can maintain uniform braking action. The purpose is to make suggestions.

A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

3 and 4 are a perspective view of the drafting table and a front view of the angle adjustment mechanism according to the present invention, 31 is a support base;
2 is a support stand; 33 is an elevating stand that can be raised and lowered with respect to the support stand; 3
Reference numeral 4 denotes a pedal for controlling the lifting and lowering operation of the lifting table 33, and each pedal has almost the same structure as shown in FIG. 1.

On the other hand, 35 is an angle adjustment mechanism, as shown in FIG.
A brake shaft (not shown) is passed through the two angle adjustment plates 36 and 37 whose upper portions are bent into an L shape, and the two angle adjustment plates 36 are penetrated by the brake shafts.
．． Brake plates 38, 39 and 40.4 sandwiching 37
1 is provided.

A brake pipe 42 is passed through the brake shaft between the angle adjustment plates 36 and 37, and has one end abutted against the brake plate 39 and the other end abutted against the brake plate 40.

43 and 44 are double nuts screwed onto one end of the brake shaft, and 45 is a pin 4 screwed onto the other end of the brake shaft.
The brake lever is rotatably mounted around the brake lever 6, and its cam portion 47 is in contact with the brake plate 41 as in FIG.

Therefore, in the state shown in FIG. 4, the brake plates 38, 39 and 40, 41 are the same as the angle adjusting plates 36, 41, and 36.
37 is strongly held.

On the other hand, a support portion 48 and a support cylinder 49, one of which is slidable relative to the other, are interposed between the ends of both angle adjustment plates 36 and 37, and one end of each is bent into an L shape and has a through hole. A fulcrum pin 50.51 passing through both angle adjustment plates 36.37 is inserted into the through hole, and the support portion 48 and the support cylinder 49 are tightened and held by nuts 52.53, respectively. It has become.

Reference numerals 54 and 55 indicate fixing screws for fixing the support portion 48 and the support tube 49 at a portion where they slide into contact with each other.

56° 57 is the bent piece 36 of the angle adjusting plate 36, 37
a, 37 is a long hole drilled in the width direction of a, and almost coincides with the through hole drilled in the mounting plate 60.61 attached to the left and right drawing board frames 58.59 as shown in Fig. 3. , bolts and nuts 6 are inserted into these through holes and the elongated holes 56 and 57.
2°63 to the mounting plate 60.61 and the angle adjusting plate 36.
37 is fixed.

Therefore, the angle adjustment plate 36.
37 to the mounting plate 60.61, and as described above, connect the through hole provided in the mounting plate 60.61 and the angle adjustment plate 3.
Align the elongated holes 56 and 57 provided in 6.37 appropriately, fix with bolts and nuts 62.63, and tighten the previously loosened fixing screws 54 and 55. The sliding movement between the support tube 49 and the support tube 49 is fixed at that position.

That is, the double nuts (43, 44) are adjusted corresponding to the widths of the drawing board frames 58, 59, and both angle adjustment plates 3
After the interval between 6.37 and 54.5 is set and the braking strength is adjusted to a predetermined value, the fixing screw 54.5 is
5 fixes the support portion 48 and the support tube 49.

In addition, in the above, the long holes 56 and 57 are connected to the angle adjustment plate 36.
．． Although it is provided on the bent pieces 36 a and 37 a of No. 37, it may also be provided on the drawing board frame 58 and 59 side, and if necessary, it may be provided on both of these.

Further, in FIG. 3, it is also optional that the through holes provided in the mounting plates 60, 61 are elongated holes.

Further, the braking operation by the brake lever 45 is not limited to a cam type, but any type of brake mechanism such as a toggle type may be employed.

As is clear from the above description, the present invention includes a support base, a support stand erected on the support base, an elevating table that can be raised and lowered with respect to the support stand, and an angle adjustment mechanism for the elevating table. The angle adjustment mechanism has a pair of angle adjustment plates and a pair of drawing board frames fixed to the lifting platform and fitted into a guide hole formed in the angle adjustment plate. It has a brake rod and an adjustment plate support member extendably arranged between the angle adjustment plates, and a long hole is provided in one or both of the drawing board frames and the angle adjustment plates. By making it possible to arbitrarily adjust the relative mounting position of the drawing board frame, manufacturing errors occur in the drawing board frame. The plate frame can be attached to a predetermined position, and the distance between the angle adjustment plates can be maintained at a predetermined distance.

Therefore, it is possible to obtain an angle adjustment mechanism that corresponds to the width dimension of any drawing board frame, and it is also possible to obtain a uniform braking force applied to each of the adjustment plates.

Further, the conventional mechanism for adjusting the length of the brake pipe (such as a double nut) for adapting the angle adjustment plate to the drawing board frame can be omitted, resulting in lower costs as a whole and excellent practicality.

[Brief explanation of drawings]

1 and 2 are a perspective view of a conventional drafting table and a front view of the angle adjustment mechanism, and FIGS. 3 and 4 are a perspective view of the drafting table and a front view of the angle adjustment mechanism according to the present invention. 36.37... Angle adjustment plate, 38, 39, 40
．． 41...Brake plate, 42...Brake pipe, 43.44...Double nut for brake adjustment, 45...Brake lever, 58°59... ...Drawing board frame, 60.61...Mounting plate, 48...Support part, 49...Support cylinder.

Claims (1)

[Scope of utility model registration request] A support base, a support stand erected on the support base, an elevating table that can be raised and lowered with respect to the support stand, and a pair of drawing board frames attached to the elevating table via an angle adjustment mechanism. The angle adjustment mechanism includes a pair of angle adjustment plates, a brake rod fixed to the elevator platform and fitted into guide holes formed in each of the angle adjustment plates, and a brake rod fixed to the elevator platform and fitted between the angle adjustment plates. and an adjustment plate support member arranged telescopically at the plate frame, and a long hole is provided in one or both of the drawing board frames and the angle adjustment plates, so that the relative mounting positions thereof can be arbitrarily adjusted. A drafting table that is characterized by being wet.