JPS5826575Y2 - Angle brake device for drafting table - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an angle brake device for a drafting table, and an object of the present invention is to provide an angle brake device that has a simple structure and reliable operation.

The configuration of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

Reference numeral 2 denotes an elevating leg member of the drafting table, and a tubular member 4 is fixed to the upper end of this leg member, and a tubular member 6 is fitted and fixed to the member 4.

A tube portion 8a of a support member 8 is fitted onto the outer peripheral portion of the tubular member 6 and is fixed thereto.

10 is a cap member, the threaded portion of which is connected to the tubular member 6
It is screwed into a threaded part formed on the inner circumferential surface of.

A tubular holding portion 8b is formed in the supporting member 8 in a direction horizontal to the floor surface, and a tubular body 12 is fitted into the holding portion 8b.
The tube body 12 is fixed to the holding portion 8b by screws 14.

Reference numeral 16 denotes a cylindrical body whose diameter can be expanded freely, which fits into the inner circumferential surface of the end of the tube 12, and as shown in FIG. 3, a plurality of slits 18 are formed through the cylindrical portion.

The side surface of the flange 20 of the cylindrical body 16 contacts the end surface of the tube 12, and a drawing board support frame 22 is welded to the flange 20.

Reference numeral 24 designates a tubular tapered member, into which a shaft 26 is slidably inserted, and the outer circumferential surface of the flange of the tapered member 24 slides on the inner circumferential surface of the cylindrical body 16. They fit together freely.

Reference numeral 28 designates a cylindrical retainer, into which steel balls 30 and 31 (convex curved surface members) are rotatably fitted into holding holes formed through the retainer. surface(
(inclined surface) and the inner circumferential surface of the cylinder 16.

Reference numeral 32 denotes a disc fitted and fixed to the inner circumferential surface of the tubular body 12, and an end portion of the inner circumferential surface of the retainer 28 is fitted to the outer curved surface of the protrusion of the disc 32.

The shaft 26 is inserted into a transparent hole in the center of the board 32.
is slidably inserted.

A cam member 34 is rotatably supported by a shaft 36 at one end of the shaft 26, and a lever 38 is fixed to this cam member.

The cam member 34 is formed with a flake release surface 34a and a flake hook surface 34b.

The left side of the tubular body 12 has substantially the same configuration as above, but a stopper member (not shown) is attached to the left end of the shaft 26 instead of the cam member 34, and the stopper member is attached to the other tapered member. It is in contact with the rear end surface of.

A drawing board is fixed to the drawing board support frame 22 with wood screws.

Next, the operation of this embodiment will be explained.

The drawing board support frame 22 is rotated around the tubular body 12, set at a desired angle, and the lever 38 is swung to apply the brake of the cam member 34 so that the surface 34b is brought into contact with the rear end surface of the tapered member 24. Then, the tapered member 24 moves to the left in the drawing relative to the retainer 28, and the tapered surface of the tapered member 24 presses the steel balls 30, 31 against the inner wall surface of the cylinder 16.

The diameter of the cylindrical body 16 expands due to the pressing force of the steel balls 30 and 31, and the outer peripheral surface of the cylindrical body 16 is brought into pressure contact with the inner peripheral surface of the tubular body 12.
A drawing board support frame 22 that interlocks with this is fixed to the tube body 12.

By swinging the lever 38 in the opposite direction to the above, the cam member 3
If the brake release surface 34a of No. 4 is located on the rear end surface of the tapered member 24, the fixation of the drawing board support frame 22 will be released, and the support frame 22 will be in a state where it can freely rotate around the tube body 12. .

Note that a ring-shaped member may be used instead of the steel balls 30 and 31.

Since the present invention is constructed as described above, it has the advantage of being able to reliably fix and release the drawing board support frame at a desired angle with a simple structure.

[Brief explanation of drawings]

The drawings show a preferred embodiment of the present invention, with FIG. 1 being a plan view, FIG. 2 being a side view, and FIG. 3 being an external view of the tubular member. 2... Lifting leg member, 4... Member, 6... Tubular member, 8... Support member, 10... Cap member, 12...
...Pipe body, 14...Screw, 16...Cylinder body, 22...
・Support frame, 24...Tapered member, 26...Shaft, 28...Retainer 30, 31...Steel ball, 34
...Cam member, 38...Lever.

Claims (1)

[Scope of utility model registration request] Pipe body 12 supported horizontally at a predetermined height position with respect to the floor surface
a shaft 26 which is loosely fitted into the tubular body 12 and whose one end is locked to one end of the tubular body 12 by an appropriate means; A cylindrical body 16 having a freely adjustable diameter, a member 24 that is slidably fitted into at least the other side of the shaft 26 and has an inclined surface formed thereon, and a connection between the inclined surface of the member 24 and the inner circumferential surface of the cylindrical body 16. A diagram showing a convex curved surface member 30.31 disposed between, a cam member 34 rotatably supported on the other end of the shaft 26 and having an eccentric cam surface facing the member 24, and fixed to the cylindrical body 16. An angle brake device for a drafting table consisting of a plate support frame 22.