JPH0435196Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a dust-proof device for an automatic drawing device that is housed in a small case and can be used by attaching the case to a scale mounting plate of a universal parallel ruler. Regarding.

[Conventional technology]

In this type of automatic drawing device, a long hole is formed in the front wall of the case to allow the pen support arm to protrude outside, and the pen support arm is controlled to move in the X direction along this long hole, and the pen support arm is controlled to move in the X direction. The arm is configured to be controlled to move in the forward and backward direction along its longitudinal direction, that is, in the Y direction.

[Problem that the invention attempts to solve]

As mentioned above, if the automatic drawing device is placed on the drawing table with the long hole open, eraser scraps, dirt, dust, etc. may enter the case through the long hole. It can easily invade. If a lot of dust gets into the case,
Dust may enter the inside of the motor housed in the case, causing motor failure. Also,
In the case of an automatic drawing device of the type that converts the rotation of the pulley into the movement of the pen support arm in the above-mentioned XY directions via a rope-like member, if dust adheres to the surface of the pulley inside the case, the diameter of the pulley will change, causing the pen This may cause movement errors.

In order to eliminate the above-mentioned defect, if the elongated hole is covered with a shielding curtain, when the pen support arm moves in the longitudinal direction, the shielding curtain will get caught up in the pen support arm. There were deficiencies that prevented smooth movement control of the pen support arm.

The present invention aims to eliminate the above defects.

[Means to solve problems]

In order to achieve the above object, the present invention forms a long hole 22 in the front wall 2a of the case 2 along its longitudinal direction, and a pen support arm 20 that holds a pen 94 at its tip protrudes from the long hole 22 to the outside. , the pen support arm 20 is controlled to move in the X direction along the long hole 22 and the Y direction along the longitudinal direction of the support arm 20, and the pen 94 is moved perpendicularly to the bottom wall of the case 2. In an automatic drawing device whose movement is controlled in the Z direction, a resilient upper shielding member 11 is located at a position that shields the upper half of the elongated hole 22.
8 is attached to the front wall 2a side of the case 2 in an inclined state with respect to the pen support arm 20, and a resilient shielding member 120 is installed at a position that shields the lower half of the elongated hole 22 so that its open end is It is attached to the front wall 2a side of the case 2 in an inclined state with respect to the pen support arm 20 so as to contact the upper shielding member 118 in a V-shape.

[Effect]

As mentioned above, the upper and lower shielding members 118, 120
is fixed to the front wall 2a of the case 2 in an inclined state with respect to the pen support arm 20, so a biasing force acts on the joint portion of the upper and lower shielding members 118, 120 in the direction of opening. Even if the pen support arm 20 moves forward and backward along the longitudinal direction while touching the joint portion of the upper and lower shielding members 118 and 120, the upper and lower shielding members 118 and 120 will not be caught in the pen support arm 20. Instead, the pen support arm 20 is smoothly controlled to move forward and backward along its longitudinal direction.

〔Example〕

The configuration of the present invention will be described in detail below based on embodiments shown in the accompanying drawings.

In Fig. 2, 2 is a case of the automatic drawing device, and on the upper edge of the bottom wall of this is a horizontal scale 4 and a mounting bracket for removably connecting the case 2 to the scale mounting plate of the universal parallel ruler. 5 is fixed. Reference numerals 6 and 8 designate X-axis guides fixed to the bottom of the case 2 via brackets, into which the inner diameter portions of the X cursors 10 and 12 are slidably inserted. Y guide shafts 14, 16 are integrally installed on the X cursors 10, 12. 1
Reference numeral 8 denotes a Y cursor that is slidably inserted into the Y guide shafts 14 and 16, and a pair of rising portions 20a and 20b fixed to one end of the support arm 20 are provided on both sides of the Y cursor so that the shaft can rotate freely. 21, 23 are supported. The support arm 20 is disposed below the X guide shaft 6, and the support arm 20 passes through a horizontally elongated hole 22 in the front wall 2a of the front edge of the case 2 to the front of the front edge of the case 2. It stands out. 2
Reference numeral 4 denotes a Y motor fixed to the bottom wall of the case 2, and a small gear 26 is fixed to the output shaft of the Y motor. Gear 30 at one end of 28
It meshes with the. A drum 32 is fixed to the other end of the shaft body 28, and a flexible wire rope 3 is attached to the drum 32.
4 is wound multiple times. One of the ropes 34 is hung on rope pulleys 36, 38, 40 and 42 with appropriate tension, and the rope 34 is
One end of 4 is fixed to one side of the bottom wall of case 2. The other end of the rope 34 is hung on rope pulleys 44, 46, 48 and 50 with appropriate tension, and the other end of the rope 34 is attached to the case 2.
is fixed to one side of the bottom wall. said pulley 3
6 and 44 are rotatably supported on the bottom wall of the case 2. The pulleys 38 and 42 are rotatably supported by the X cursor 10, and the pulleys 46 and 5
0 is rotatably supported by the X cursor 12. The pulleys 40 and 48 are connected to the Y cursor 1.
8 and is rotatably supported. 52 is case 2
This is an X motor fixed to the bottom wall of the case 2, and a small gear 54 is fixed to the output shaft of the X motor. An intermediate gear 56 fixed to one side of
A small gear 58 is fixed to the other shaft. A shaft 60 is rotatably supported on the bottom wall of the case 2 via a bracket, and drums 62 and 64 are fixed to both ends of the shaft. A gear 66 fixed to the shaft 60 meshes with the small gear 58. One end of the wire rope 66 wound multiple times around the drum 62 is fixed to one side of the X cursor 10, and the other end of the wire rope 66 is rotated to the bottom wall of the case 2 with an appropriate tension. It is hung on a freely supported rope pulley 68, and the other end of the rope 66 is fixed to the other side of the X cursor 10. One end of a wire rope 70 wound multiple times around the drum 64 is fixed to one side of the X cursor 12, and the other end of the rope 70 has an appropriate tension and is rotatable on the bottom wall of the case 2. The rope 7 is hung on a rope pulley 72 supported by the rope 7
The other end of 0 is fixed to the other side of the X cursor 12. Reference numeral 74 denotes a lift bar, one end of which is rotatably supported by a bracket 76 fixed to the bottom wall of the case 2, and a tube part 74b (see FIG. 3) at the other end of the lift bar 74. ) is rotatably fitted onto the protruding shaft 80 of the bracket 78. 82 is a rotating body rotatably supported by the shaft 80, and an inclined surface 82 formed on the rotating body
The output shaft of a solenoid 84 fixed to the bottom wall of the case 2 is opposed to a. The other end of the lifting bar 74 is fitted between a pair of holding pieces 82b and 82c protruding from the rotating body 82, so that the lifting bar 74 rotates in conjunction with the rotation of the rotating body 82. It is configured. The bracket 86 of the solenoid 84 is formed with a rising piece, and a stopper screw 8 is attached to the threaded portion of the horizontal portion 86a of the rising piece.
8 are screwed together. The lower end of the stopper screw 88 faces the upper surface of the bar 74, and
The range of upward rotation about the shaft 80 of No. 4 is restricted. The rotating body 82 is connected to the lifting bar 7.
The spring 90 moves upward in the front end tubular portion 74c of the
is energized by. The lower surface of the support arm 20 is bent by its own weight to the tubular portion 74c of the bar 74.
It is transparent. A pen holding hole 92 is formed at the tip of the support arm 20, into which a pen 94 consisting of a commercially available hollow pen is screwed and held. A controller for driving and controlling the XY motors 52, 24 and the solenoid 84 is installed as an integrated circuit on the board fixed to the case 2, and the operation keyboard (not shown) of the controller is mounted on the board fixed to the case 2. It is placed on the top of the upper wall. When the keyboard is operated, the XY motors 52, 24 rotate, and the X cursors 10, 12 move to the X guide shafts 6, 8.
, and the Y cursor 18 moves along the Y
It moves along the guide shafts 14 and 16. As the X cursors 10 and 12 move, the support arm 20 moves in the left-right direction, that is, in the X direction in FIG. 2 along the long hole 22 of the front wall 2a. Further, as the Y cursor 18 moves, the support arm 20 moves in the Y direction. Further, when a drive current is input from the controller to the solenoid 84, the output shaft of the solenoid 84 protrudes and the output shaft is connected to the rotating body 8.
Push 2a. The rotating body 82 is a solenoid 84
The output shaft of the clamping piece 82 is centered around the shaft 80.
b and 82c rotate in a direction approaching the table surface. As the rotating body 82 rotates, the elevating bar 74 that is interlocked with the rotating body 82 also rotates about the shaft 80.
The tubular portion 74c is lowered. The tubular portion 74c
As the pen 94 descends, the support arm 20 placed thereon by its own weight swings in the downward direction about the shafts 21 and 23, and the tip of the pen 94 comes into contact with the surface of the drawing paper on the table. When the solenoid 84 is de-energized, the rotating body 82 returns to its original position due to the return elasticity of the spring 90, and the pen 94 rises from the surface of the paper on the table. A predetermined pattern is automatically drawn on the drawing paper on the table according to the program by the lifting and lowering operations of the support arm and the moving operations in the XY directions.

Next, the elongated hole 22 of the front wall 2a of the front edge of the case 2
The dust-proof device that was used in this article will be explained.

In FIG. 1, reference numeral 116 is a holder made of a soft material that is removably fitted to the front wall 2a, and a shield made of a flexible and elastic material such as rubber or synthetic resin film is attached to the inclined surface 116a of this holder. A member 118 is secured at an angle to the support arm 20. Reference numeral 120 denotes a shielding member made of an elastic material such as rubber or synthetic resin film, and the pen support arm 20 is arranged so that its open end side contacts the shielding member 118 in a V-shape.
The inclined surface 1 of the holder 116 is inclined with respect to the
16b. the shielding member 118,
The elongated hole 22 is shielded by a shield member 120, and the pen support arm 20 is movably inserted between the open ends of the shield members 118 and 120.

In the above configuration, the front wall 2a of the case 2
The elongated hole 22 is closed by a shielding member 118. The pen support arm 20 has shielding members 118 and 1
The pen support arm 20 moves in the X direction along the joint with the pen support arm 20, and also moves in the forward and backward direction (Y direction) along its longitudinal direction. Shielding member 11
8 and 120 are inclined surfaces 116a and 116.
In other words, the shielding members 118 and 120 are biased in the direction in which the joint portions are opened by the tilting action of b.
is held in a V-shape, even if the pen support arm 20 moves in the +Y direction, the shielding member 1
18 and 120 are prevented from getting caught up in the pen support arm 20 due to the shape-retaining elasticity of the shielding members 118 and 120.

〔effect〕

As described above, in the present invention, a pair of shielding members are attached to the front wall of the case in an inclined state, and a biasing force is applied to the joint part of the pair of shielding members in the direction of opening, so that when the pen support arm moves back and forth, This has the effect of preventing the shielding member from getting caught up in the pen support arm.

[Brief explanation of drawings]

FIG. 1 is a sectional view, FIG. 2 is a plan view with the upper end of the case removed, and FIG. 3 is an exploded perspective view. 2...Case, 2a...Front wall, 4...Horizontal scale, 20...Pen support arm, 22...Long hole,
116... Holder, 118, 120... Shielding member.

Claims (1)

[Scope of utility model registration request] A long hole 22 is formed in the front wall 2a of the case 2 along its longitudinal direction, and a pen 9 is inserted from the long hole 22 to the tip.
The pen support arm 20 holding the pen support arm 20 is moved outwardly, and the pen support arm 20 is controlled to move in the X direction along the elongated hole 22 and in the Y direction along the longitudinal direction of the support arm 20. Said pen 9
4 in the Z direction perpendicular to the bottom wall of the case 2, an elastic upper shielding member 118 is provided at a position that shields the upper half of the elongated hole 22 for supporting the pen. A resilient shielding member 120 is attached to the front wall 2a side of the case 2 in a state of being inclined with respect to the arm 20, and is positioned so as to shield the lower half of the elongated hole 22, and its open end is connected to the upper shielding member 118. A dustproof device characterized in that it is attached to the front wall 2a side of the case 2 in an inclined state with respect to the pen support arm 20 so as to be in contact with the pen support arm 20 in a V shape.