JPH0314389Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention moves a casing to a desired portion of paper on a loading surface, and controls a recording device support arm protruding from the casing by a controller to move the casing to a desired portion of paper on a loading surface. The present invention relates to an automatic drawing machine that automatically draws desired characters, figures, etc. within a predetermined drawing range on paper using a recording tool held by a support arm, and more particularly to a guide device for the recording tool support arm.

[Conventional technology]

In order to allow the casing to be moved by hand on the mounting surface, the entire structure is miniaturized, and a writing instrument support arm protruding from the casing is placed inside the casing by a controller consisting of a computer.
Y consisting of a shaft guide and a pair of mutually parallel shafts
An automatic drawing machine that moves in the X-Y direction along an axis guide and controls the writing instrument at the tip of the support arm in the X-Y coordinate direction on the mounting surface is disclosed in Japanese Patent Publication No. 57-42519 and Japanese Utility Model Application No. 58- It is disclosed in Publication No. 157697. The writing instrument is located on the central axis of a straight writing instrument support arm and is held at the tip of the support arm, and the writing instrument is controlled by the controller to be brought into contact with or separated from the paper surface on the placement surface. It is configured to be lifted and lowered.

[Problem that the invention attempts to solve]

When drawing characters, figures, etc. on the drawing surface using the automatic drawing machine, the operator should monitor the actual drawing of the recording device, and if an inconvenient situation occurs, the operator should remove the casing. Position is being corrected. However, when the recording device support arm is in a straight state and the recording device is held at the center of the tip of the support arm, there is a problem in that it is difficult for the operator to see the state of the recording device. That is, the operator typically places his or her face directly above the casing. In this state, when the recording device moves in the X direction, that is, in the left and right direction to draw a picture, the operator follows the movement of the recording device,
The face will always be located on the right side of the recording device support arm. In this case, if the recording instrument protrudes to the right side of the support arm, the operator can easily see the tip of the recording instrument. Furthermore, when the front left end of the casing of an automatic drawing machine is attached to the head of a universal parallel ruler, the operator's face will be closer to the head, causing the recording tool to protrude to the left with respect to the recording tool support arm. This makes it easier for the operator to see the tip of the recording instrument. For the above reasons, a holder is provided integrally or separately on the support arm, protruding to the right or left side of the portion of the recording device support arm that protrudes from the casing, and the recording device is mounted on the holder. It is desirable to keep it. However, if the recording device is held so as to protrude to the right or left side of the support arm, an uneven load is applied to the support arm due to the weight of the recording device, and the support arm cannot slide freely along the pair of Y-axis guides. A problem arises in that the guiding bearing part becomes distorted, and the bearing part no longer operates smoothly. The present invention aims to solve this problem.

[Means to solve problems]

In order to achieve the above object, the present invention includes a casing 2 that is movably placed on a mounting surface, and an X cursor 10, 12 that is driven along X cursor 1
A pair of mutually parallel Y-axis guides 18 and 20 are fixedly installed in a direction perpendicular to the X-axis guides 6 and 8 at 0 and 12, and a pair of Y-axis guides 18 and 20 are movably attached to the Y-axis guides 18 and 20. a Y cursor 22, a support arm 26 connected to the Y cursor 22 and whose tip protrudes forward of the casing 2 from an opening provided in the casing 2; In an automatic drawing machine equipped with a recording device and a drive mechanism for driving the XY cursors 10, 12, and 22, the Y cursor 22 is
A main bearing 23 with a large bearing interval and secondary bearings 24, 24 with a small bearing interval are provided, the main bearing 23 is mounted on the Y-axis guide 20 on the side from which the recording device protrudes, and the secondary bearing 24 is mounted on the other side. It is attached to the Y-axis guide 18 of.

[Effect]

In the above configuration, the X cursors 10, 12
is driven along the X-axis guides 6, 8, the support arm 26 moves in the X-coordinate direction, and when the Y-cursor 22 is driven along the Y-axis guides 18, 20, the support arm 26 moves in the Y-coordinate direction. Moving. Further, the recording device is controlled so that a predetermined image is drawn on the sheet of paper on the placement surface. The recording device is the support arm 26
Because it protrudes to the side, there is a Y on this protruding side.
An unbalanced load is applied to the cursor 22. This unbalanced load is
It is supported by the main bearing 23 with a large bearing contact area, and the error in parallelism between the Y-axis guides 18 and 20 is supported by the secondary bearing 24 with a small bearing contact area.
The Y cursor 22 is absorbed by the degree of freedom of Y
It moves smoothly and with high precision along the shaft guides 18 and 20.

〔Example〕

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 a casing of the automatic drawing machine, and a mounting bracket 4 connectable to a scale mounting plate of a known universal parallel ruler device is fixed to a protrusion protruding from the left end of the front portion of the casing. 5 is a scale, 6 and 8 are X-axis guides fixed to the bottom of the case 2 via a bracket, and one X-axis guide 6 has an
The inner diameter part of the cursor 10 is slidably inserted, and rollers 14 and 16 rotatably supported by the X cursor 12 are in contact with the other X-axis guide 8 so as to be freely movable. A pair of Y-axis guides 18 and 20 are installed in parallel to each other on the X cursors 10 and 12. Reference numeral 22 denotes a Y cursor, on one of which a bearing 23 consisting of a pair of slide ball bearings or linear slide ball bearings is fixed, and the bearing 24 is slidably inserted into the Y-axis guide 20. Said Y cursor 22
A bearing 24 consisting of a pair of rollers rotatably supported above and below is provided on the other side, and the bearing 24 is in point contact with the upper and lower surfaces of the Y guide 20 so as to be freely movable. . Y-axis guide 2 of the bearing 23
The bearing spacing with respect to 0 is set considerably larger than the bearing spacing of the bearing 24 with respect to the Y-axis guide 18. The rear end of a support arm 26 is fixed to the Y cursor 22, and the arm 26 is inserted into the recess formed at the bottom of the X cursor 10.
It is arranged so as to be slidable in a direction perpendicular to the shaft guide 6. The front part of the support arm 26 projects forward of the casing 2 through an opening formed in the front wall of the casing 2 along the X-axis guide 6. 30 is a Y motor fixed to the bottom wall of the case 2, and a belt pulley 3 is attached to the output shaft of this Y motor.
2 is fixed, and a timing belt 38 is stretched between the pulley 32 and a belt pulley 36 fixed to one end of a shaft 34 rotatably supported on the bottom of the case 2 by a bracket. has been done. A drum 40 is fixed to the other end of the shaft 34, and a flexible wire rope 42 is wound around the drum 40 a plurality of times. One end of the rope 42 is hung around the rope pulleys 44, 46, 48, 50 with appropriate tension, and one end of the rope 42 is connected to the bottom wall of the case 2 via a mounting shaft 51. The other rope 42 is connected to rope pulleys 52, 54, 5
6, 58 with an appropriate tension,
The other end of the rope 42 is connected to the bottom wall of the case 2 via a mounting shaft 59. The pulleys 44, 5
2 is rotatably supported on the bottom wall of the case 2. The pulleys 46 and 50 are rotatably supported by the X cursor 10, and the pulleys 54 and 58 are rotatably supported by the X cursor 12.
The pulleys 48 and 56 are rotatably supported by the Y cursor 22. 60 is an X motor fixed to the bottom wall of the casing 2, and a toothed belt pulley 62 is fixed to the output shaft of this motor. 6
Reference numeral 4 denotes a shaft body rotatably supported by a bracket fixed to the bottom wall of the case 2, and toothed belt pulleys 66, 68, and 70 are fixed to this shaft body. Endless timing belts 76 and 78 are disposed between the belt pulleys 66 and 68 and toothed belt pulleys 72 and 74 rotatably supported on the bottom wall of the case 2 along the X-axis guides 6 and 8. It's being hung over. Between the pulleys 62 and 70,
An endless timing belt 80 is wrapped around it. The upper horizontal portions of the belts 76, 78 are fixed to the X cursors 10, 12 by fixing screws 82. 84 and 86 are the support arms 26;
One guide shaft 84 is fitted with a hole in the elevating body 88 via a linear ball bearing so that the elevating body 88 can be freely rotated. A pair of rollers 85 that are pivotally supported are in contact with each other. A holder 89 is fixed to the elevating body 88 and protrudes from the right side of the support arm 26 . The bottom surface of the rubber stopper 90 is fixed to a nut screwed onto the guide shaft 86.
The upper end surface of the elevating body 88 is connected to a coil spring 92.
The ball is in ballistic contact due to the force of the ball. A frame 94 is fixed to the support arm 26, and a substantially middle portion of the L-shaped actuating body 96 is rotatably supported by the frame. One of the actuating bodies 96 is in contact with the upper surface of the elevating body 88, and the other of the actuating bodies 96 is connected to one end of a transmission member 98 made of a wire rope. The other end of the transmission member 98 is connected to a solenoid fixed to the Y cursor 22, that is, the output shaft 1 of the drive device 100.
It is connected to 02. The holder 89 has a recording device 10 such as a commercially available hollow pen or lead pen.
2 is removably attached. When the upper end of the elevating body 88 is in elastic contact with the rubber stopper 90, the tip of the recording device 102 is configured to be spaced apart from and opposed to the paper on the table surface for a predetermined distance. A display device made of liquid crystal and a keyboard are arranged on the upper surface of the casing 2, and these are connected to a controller made of a microcomputer built in the casing 2. The keyboard is provided with data keys and various command keys for recalling various figures and character patterns from the storage section of the controller. Said
XY motors 60, 30 and drive device 100 are connected to the controller. The controller is connected to an external power source via a cord.

Next, the operation of this embodiment will be explained.

Casing 2 in the desired position of the paper on the table
, and in this state operate the keyboard to input drawing information into the controller. Next, when you start the drawing operation, from the controller
A drive signal is supplied to the XY motors 60 and 30,
The output shafts of the XY motors 60 and 30 rotate. This rotation causes the X cursors 10 and 12 to move along the X-axis guides 6 and 8, and the Y cursor 2 to move along the X-axis guides 6 and 8.
2 moves along the Y-axis guides 18 and 20. The movement of the X cursors 10 and 12 causes the support arm 26 to move along the opening in the front wall of the casing 2.
In FIG. 1, it moves in the left-right direction, that is, in the X direction. Also, by moving the Y cursor 22, the support arm 2
6 is regulated by guides 104 and 106 and moves in the Y direction. When a drive current is input to the drive device 100 from the controller, the output shaft 102 retreats to the left in FIG. 2, and the transmission member 98 moves to the left. As a result, the actuating body 96 rotates clockwise in FIG. Pressed down, recording device 1
The tip of 02 is caused by the excitation force of the drive device 100,
It makes elastic contact with the paper on the table. When the power supply to the drive device 100 is stopped, the transmission member 98 in FIG.
The leftward driving force is released, and the elevating body 88 moves toward the guide shafts 84 and 86 due to the elastic force of the coil spring 92.
The tip of the recording device 102 is moved away from the paper for a predetermined period of time. A predetermined character pattern is automatically drawn on the sheet of paper on the table, that is, the placement surface, from left to right by the above-mentioned lifting and lowering of the holder 88 and movement of the support arm 26 in the X and Y directions. Ru.
The state of drawing of this writing instrument 102 is shown in the holder 89.
protrudes to the right with respect to the support arm 26, so it can be monitored from an angle that is easy to see from the operator side.

If a known structure is adopted in which the support arm 26 is pivoted to the Y cursor 22 so as to be able to move up and down with respect to the mounting surface and the support arm 26 is controlled up and down, the holder 89 can be integrally attached to the support arm 26. It may also be formed.

Moreover, when the holder 89 is made to protrude to the left side of the support arm 26, it is possible to
3 on the left side of the Y cursor 22, and
is movably mounted on the Y-axis guide 18, and a bearing 24 with a small bearing interval is movably mounted on the Y-axis guide 20 on the right side of the Y-cursor 22.

〔effect〕

As mentioned above, the present invention movably attaches the main bearing provided on the Y cursor with a relatively large bearing spacing to the Y-axis guide on the side from which the recording device protrudes out of a pair of mutually parallel Y-axis guides. Since the secondary bearing provided on the Y cursor with a relatively small bearing spacing is movably attached to the Y-axis guide on the opposite side, the uneven load of the Y cursor can be received by the bearing with a large bearing spacing. The influence of twisting between the Y-axis guide and the bearing can be reduced. Therefore, it is possible to prevent wear of the Y-axis guide, and since the bearing to which the unbalanced load of the recording device is not applied has a small bearing interval, it has a degree of freedom with respect to the Y-axis guide. Even if there is an error in the parallelism between the Y-axis guides, the Y-cursor does not move slowly, and the Y-cursor can be smoothly moved along the pair of Y-axis guides.

[Brief explanation of drawings]

Fig. 1 is a plan view with the upper part of the casing cut away, Fig. 2 is a side sectional view, Fig. 3 is a sectional view, Fig. 4 is a sectional view, Fig. 5 is a plan view, and Fig. 6 is a sectional view. , FIG. 7 is a side view. 2...Casing, 4...Mounting bracket, 6, 8...
...X-axis guide, 10,12...X cursor, 1
4, 16... Roller, 18, 20... Y-axis guide,
22...Y cursor, 23...bearing, 24...bearing, 26...support arm, 30...Y motor, 3
2...Belt pulley, 38...Timing belt, 40...Drum, 42...Rope, 44,4
6,48,50...rope pulley, 52,54,
56, 58... Rope pulley, 60... X motor, 66, 68, 70... Belt pulley, 76,
78, 80...timing belt, 84, 86...
... Guide shaft, 89 ... Holder, 96 ... Operating body, 98 ... Transmission member, 100 ... Drive device, 1
04,106...Guide.

Claims (1)

[Scope of utility model registration request] Casing 2 movably placed on the placement surface
and an X-axis guide 6 built into the casing 2,
X cursors 10, 12 driven along 8;
The X-axis guides 6 and 8 are attached to the X cursors 10 and 12.
a pair of mutually parallel Y-axis guides 18 and 20 fixed in a direction perpendicular to the Y-axis guide 1;
Y cursor 2 movably attached to 8, 20
2, a support arm 26 connected to the Y cursor 22 and whose tip protrudes forward of the casing 2 from an opening provided in the casing 2; and a record provided protruding to the side of the support arm 26. ingredients and
In an automatic drawing machine equipped with a drive mechanism for driving the XY cursors 10, 12, and 22, the Y cursor 22 is provided with a main bearing 23 with a large bearing spacing.
and secondary bearings 24, 24 with a small bearing interval are provided, the main bearing 23 is mounted on the Y-axis guide 20 on the side from which the recording device protrudes, and the secondary bearings 2
4 is attached to the other Y-axis guide 18.