JPS6228917Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] This invention fixes the above-mentioned tilting mechanism of the drawing board support frame, which is attached to the upper part of the support leg of the drafting table so that it can be tilted or further raised and lowered, or This invention relates to a guide device for a brake lever that operates a brake mechanism that switches between two modes.

[Background technology and its problems]

As a conventional drafting table, for example, as shown in FIG.
A drawing board support frame 3 is attached to the upper end of the drawing board via a lifting and tilting mechanism. That is, the support frame 3 is configured to be vertically movable with respect to the support leg 2 by means of the lifting rod 4, so that the installation height position can be variably adjusted, and the installation inclination angle of the support frame 3 in the front and back direction can be freely adjusted. It is pivotally supported at the upper end of the lifting rod 4 so that

This allows the drafter to set the installation position of the drawing board 5 mounted on the support frame 3 to a desired height and inclination. The lifting and inclination operating mechanisms are each provided with a brake mechanism (not shown) in order to fix the desired height and inclination.

A pedal 5 is provided on the front surface near the lower end of the support leg 2 so as to be operable by foot in order to switch the brake of the lifting mechanism of this brake mechanism between an activated state and a deactivated state. Further, the brake lever 6 is provided so that the operating end 6A thereof protrudes toward the front side where the operator is located so that the brake of the tilting mechanism can be operated by hand. This allows the operator to easily adjust the installation state of the drawing board at the drafting work position, that is, at the front side of the drafting table. The base end 6B of the brake lever 6 is connected to a brake mechanism (not shown) provided between the support frame 3 and the lifting rod 4 near the center of the board support frame 3.

However, with this configuration, there is a problem in that the operating end 6A of the brake lever 6 protrudes toward the lower front side of the drawing board support frame 3 and hits the knees of the drafting worker, causing a hindrance to the drawing worker's work.

Further, as shown in FIG. 2, the lever connecting portion of the brake mechanism is provided so as to protrude to the outside of the side frame 3A, and the brake lever 6 of the tilting mechanism is provided to protrude to the outside of the side frame 3A of the support frame 3. There is something arranged like this. With this type of drafting table, it is possible to avoid the problem that the brake lever 6 interferes with the drafting worker's knee, etc., but it is possible to prevent the operation end 6A side of the lever 6 from drooping. In order to
It is protruded from the side in front of A. This lever guide 7 has a horizontal elongated hole 7A through which the operating lever 6 is inserted and supported, and the lever 6 moves horizontally along the elongated hole 7A, that is, in the directions of arrows A and B in FIG. It can be operated freely. When the brake is released, it is moved in the direction of the arrow B, and when the brake is applied, it is moved in the direction of the arrow A.

By the way, the lever guide 7 is always provided protruding from the side of the drawing board support frame 3, and moreover, its protruding tip 7B
is in a state where it protrudes further outward than the moving end of the lever 6 in the direction of arrow B, so it takes up a lot of space around the drafting table, and when someone else passes around the drafting table, it is difficult to bump into it. A new problem arose: dripping and getting in the way.

Therefore, by providing the brake lever 6 at the lower front side of the drawing board support frame 3 as described above, it is possible to prevent the brake lever 6 from hitting the knee of the drafting worker or protruding largely to the side of the drawing board support frame. It is requested that the device be installed in a position where it will not get in the way and avoid it.

[Purpose of invention]

The present invention was devised in view of the above-mentioned circumstances, and there is no protrusion of the drawing board support frame in the forward downward direction or outward direction, which prevents it from getting in the way during drafting work or from protruding into the surrounding area. The purpose of this invention is to provide a lever guide mechanism for a brake lever that does not exist before.

[Summary of the idea]

The present invention includes a base, a drawing board support frame pivotably supported on the base at least so as to be tiltable, a brake device provided between the support frame and the base, and one side edge of the support frame. a brake lever that is disposed along the side edge and operates the brake device by protruding outward from the one side edge; a lever support member that is integrally disposed with the lever and is formed to protrude laterally; and the lever. supports the supporting member, and when the operating lever is moved in a direction approaching one side edge of the supporting frame, the protruding tip of the supporting member is slidably guided inwardly of the drawing board supporting frame. The present invention is characterized in that a guide member is disposed on the lower surface side of the one side edge of the drawing board support frame.

〔Example〕

Next, an embodiment of the present invention shown in FIG. 3 will be described. Incidentally, the same members as those shown in FIGS. 1 and 2 are given the same reference numerals.

In the figure, 3 is a drawing board support frame, and side frames 3A located on both sides are connected by a horizontal frame 3B, and a drawing board 5 is attached and supported on the upper surface side of this frame. Also, the front end 30 of the side frame 3A
For example, a pencil case 8 bent into a U-shape that opens upward is attached to A so that writing instruments can be stored along the front edge of the drawing board 5.

In this example, the end portion 3 of the side frame 3A
A cylindrical sliding bush 32 having a guard hole 31 penetrating from the inner surface 30B to the outer surface 30C is fitted and supported at the location 0A to constitute a guide portion.

Furthermore, the operating end of the brake lever 6 is provided with a grip 60 made of, for example, rubber or synthetic resin.
A lever support member 61 is attached to the middle part of the lever near the grip. The lever support member 61 is integrally fixed to the lever 6 by the lever fitting and fixing part 61A formed in an inner annular shape at the base end, and extends in the radial direction of the fixing part 61A. It is configured by a guide 61B. The rod 61B is inserted into the guide hole 31 of the sliding bush 32 and held slidably, and
A locking protrusion 61C, such as an E-ring, is provided at the tip of the rod protruding inward from the side frame 3A from the rod 6 so as to protrude in the outer radial direction.
1B from falling out of the guide hole 31 is prevented. The length of the guide rod 61B is set to a length that allows the lever 6 to move within a range that allows the brake mechanism (not shown) to be locked or unlocked by moving the brake lever 6 in the directions of arrows A and B in FIG. It is something that will be done.

In the above configuration, when trying to adjust the inclination angle of the drawing board support frame 3, the grip 60
, and move the lever 6 to the end in the direction of arrow B to release the brake mechanism (not shown) and set it in a free state. In this state, adjust the inclination as described above to bring the drawing board support frame 3 into the desired installation state, and then grasp the grip 60 and move the lever 6 to the end in the direction of arrow A. The brake mechanism (not shown) is activated as shown in the figure above. The plate support frame 3 is fixed in the above installed state.
In this state, the brake lever 6
are housed and held in parallel along the outer surface 30C of the side frame 3A of the drawing board support frame 3. Furthermore, when the lever 6 is moved in the directions of the arrows A and B,
The guide rod 61B slides while being inserted into the slide pusher 32, and the grip 60 of the brake lever 6 is always held at a constant horizontal position.

Next, FIG. 4 shows another embodiment of the present invention, and in the case of this example, the side frame 3A of the drawing board support frame 3 is
A lever guide 62, which is a guide portion, is fixedly disposed on the lower surface near the front end portion 30A. This guide 62 is made by bending a long metal plate into an L shape near both ends to form fixing parts 62A, 62B for attaching to the lower side surface 30D of the side frame.
62B is fixed to the side frame 3A by a set screw or welding (not shown). Further, a portion near the middle of the guide 62 is bent to bulge downward in the figure so as to maintain a gap between the guide 62 and the lower side surface 30D.
A guide flat plate portion 62C is formed.

On the other hand, a grip 60 is fitted to the tip of the brake lever 6, that is, the front end.
An elongated slide protrusion 63 serving as a lever support member is integrally provided on the side of the grip 60 and protrudes horizontally, and a long hole 64 is cut into the protrusion 63.
A guide flat plate portion 62C of the lever guide 62 is inserted and locked. Therefore, the brake lever 6 is held so as to be movable in the directions of arrows A and B within the length range of the elongated hole 64.

In this embodiment as well, when the brake mechanism is released, the brake lever 6 is moved to the end in the direction of the arrow B, and when the brake is activated, the brake lever 6 is moved to the end indicated by the arrow A.
The brake can be applied by moving it to the end of the direction.

[Effect of idea]

As is clear from the description of the above embodiment, in the present invention, the brake lever 6 is a slidable engagement between a guide portion provided on the side frame 3A of the drawing board support frame 3 and a lever support member protruding from the brake lever 6. The brake lever 6 is always held in a horizontal position due to the brake action, and when the brake is applied, that is, during drafting work in which the drawing board is installed in the desired position, the brake lever 6 is installed parallel to the side frame 3A, and the lever 6 is Since the attached lever support member is horizontally inserted into the support frame 3, it does not protrude outward or downward and does not interfere with drafting work.

Furthermore, there is no protrusion around the drafting table, and the surrounding space can be used effectively.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view showing a conventional example, Fig. 2 is a perspective view of main parts showing another conventional example, Fig. 3 is a cutaway perspective view of main parts showing an embodiment of the present invention, and Fig. 4 is the same. FIG. 7 is a perspective cutaway view of a main part showing another embodiment. 1... Seat portion, 2... Support leg, 3... Drawing support frame, 3A... Side frame, 6... Brake lever, 32
...Guide bushing, 61 ...Lever guide, 6
2...Lever guide, 63...Protrusion piece.

Claims (1)

[Scope of utility model registration request] a base; a drawing support frame pivotally supported on the base at least in a freely tiltable manner; a brake device provided between the support frame and the base; and a brake device disposed along one side edge of the support frame. a brake lever that operates the brake device by protruding outward from the one side edge; a lever support member that is integrally provided with the lever and protrudes laterally; and a support member that is attached to the lever. a guide member that supports the support member and slides and guides the protruding tip of the support member toward the inside of the drawing board support frame when the operating lever is moved in a direction approaching one side edge of the support frame; A brake lever guide device for a drafting table, characterized in that the brake lever guide device is disposed on the lower surface side of the one side edge of the drawing board support frame.