JPH0340639Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mounting device for a roller in a rail cursor of a rail-type freely parallel, ruler or rail-type coordinate analyzer.

Various structures of this type of device have been developed in the past, but a roller support shaft is loosely fitted into a hole on the cursor side, and this roller support shaft is moved in the direction of the rail surface within the hole by the force of a spring member. A common configuration is that the rollers that move and fit onto the roller support shaft are pressed onto the rail surface.

According to this configuration, the roller support shaft is tilted within the cursor hole by the spring force, and when the roller support shaft is tightly tightened with a nut in this inclined state, the roller support shaft is vertically displaced within the hole, and this displacement causes the roller support shaft to be vertically displaced within the hole. However, when the roller support shaft is fixed to the cursor, the pressure on the rail surface of the roller increases, making it difficult for the cursor to move along the rail. The object of the present invention is to eliminate the above-mentioned defects.

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

First, the outline of the rail type universal parallel ruler will be explained with reference mainly to FIG. 1.

Reference numeral 2 denotes a drawing board, to which a horizontal rail 4 is attached using a vise-type fitting. A horizontal cursor 6 is movably attached to the horizontal rail 4. One end of a vertical rail 8 is attached to the horizontal cursor 6 via a bracket. A tail roller 10 rotatably attached to the other end of the vertical rail 8
is placed on the second side of the drawing board. A vertical cursor 12 is movably attached to the vertical rail 8, a head 16 is attached to the side of the vertical cursor 12 via a connecting member 14, and a ruler 1 is attached to the head 16.
8 and 20 are attached. When the handle of the head 16 is grasped by hand and force is applied in any direction parallel to the drawing board 2 surface, the horizontal cursor 6 moves along the horizontal rail 4, and the vertical cursor 12 moves along the vertical rail 8. moves, and the rulers 18, 20, which are interlocked with the head 16, are translated in a desired direction on the drawing board 2.
Next, the structures of the body muscle vertical rail 8 and the vertical cursor 12 will be explained with reference to FIGS. 2 to 7.

The vertical rail 8 made of an aluminum material has a vertical rail part protruding along its longitudinal direction, and the rail part has lateral vibration control guide rails 22 and 24 made of round steel bars extending over the entire length in the longitudinal direction. It is arranged. Horizontal rail surfaces 26 and 28 are formed on both sides of the vertical rail 8 over the entire length in the longitudinal direction. On both sides of the vertical cursor 12, there are vertical rollers 30, 32, corresponding to the horizontal rail surfaces 26, 28.
34 is rotatably supported. Vertical cursor 1
2, there are horizontal rollers 3 made of steel ball bearings corresponding to the guide rails 24.
6 and 38 are rotatably supported by shafts 40 and 42. Reference numerals 44 and 46 indicate horizontal rollers made of steel ball bearings rotatably supported on the vertical cursor 12 in correspondence with the guide rails 22, respectively. It has a roller adhesion mechanism that automatically brings them into close contact.

Next, the roller contact mechanism will be explained in detail with reference to FIGS. 3 to 6. Reference numeral 50 denotes a roller support shaft consisting of a collar portion 50a, a large diameter portion 50b, and a small diameter portion 50c, and the inner ring of the roller 44 is fitted onto the outer peripheral surface of the cylindrical large diameter portion 50b. The center of the horizontal cross-sectional circle of the large diameter portion 50b is the center of the horizontal cross section of the large diameter portion 50b.
It is eccentric by a predetermined amount with respect to the center of the horizontal cross-sectional circle of 0c. Flange portion 50 formed at the upper end of large diameter portion 50b
The lower surface of a is in contact with the side end surface of the inner ring of the roller 44, and both end surfaces of the inner ring of the roller 44 are sandwiched between the lower surface of the flange portion 50a and the upper end surface of the tube portion 52 formed in the vertical cursor 12. has been done. The outer peripheral surface of the small diameter portion 50c is rotatably fitted to the inner peripheral surface of the tube portion 52. A screw hole 54 is opened at the lower end of the small diameter portion 50c. Reference numeral 56 designates a knob, and a screw insertion hole is provided in the center of the knob, a tube portion formed in the knob 56 fits into the lower part of the small diameter portion 50c, and an upper end surface of the knob tube portion is connected to the tube portion. 5
It is rotatably opposed to the lower end surface of 2. A cap screw 58 is inserted into the screw insertion hole of the knob 56, and the screw 58 is screwed into the screw hole 54. Reference numeral 60 indicates a stopper pin protruding from the lower surface of the vertical cursor 12, and reference numeral 62 indicates the flange portion 56 of the knob 56.
A is a stopper pin protruding from the pin 6.
The pin 60 is located on the second movement path. A spiral spring 64 is attached to the tube portion 56b of the knob 56.
One end of the helical spring 64 is engaged with the stopper pin 60, and the other end of the helical spring 64 is engaged with the pin 62. Indicators 66 and 68 are provided on the lower surface of the knob 56 and the vertical cursor 12, respectively, as shown in FIGS. The close contact mechanism of the roller 46 also has the same structure as above. In the state where the rollers 36 and 38 are in contact with the rail 24, the roller support shaft 5
The rotation locus of the outer peripheral surfaces of the rollers 44 and 46 on a plane parallel to the two surfaces of the drawing board due to the rotation of 0 is as follows:
Between a state where the rail 22 is separated from the roller guide surface A (see FIG. 2) for a predetermined distance on the outside B of the rail 22 and a state where it enters the inner side of the roller guide surface A for a predetermined distance, It is set.

The relationship between the roller of the horizontal cursor 6 and the horizontal rail 4 is the same as the relationship between the vertical cursor 12 and the vertical rail 8. Note that 74 is a known brake device, and brake shoes 70 and 72 are opposed to the brake surface.

Next, the operation of this embodiment will be explained.

A case where the vertical cursor 12 is attached to the vertical rail 8 will be explained. First, the knob 56 is placed at the lower end of the tube section 52, and one end of the spiral spring 64 is connected to the pin 6.
Lock it at 0. In this state, the helical spring 6
The other end of 4 is locked to a pin 62.

Next, rotate the knob 56 two or three times until the proper spring pressure is obtained, and then
8 into the screw hole 54 tightly, and then tighten the knob 56.
is fixed to the roller support shaft 50. In this state, turn knob 5
When you release your hand from 6, the knob 56 will release from the hanging spring 6.
4 rotates until the stopper pin 62 collides with the stopper pin 60 and is locked. In a state where the stopper pin 62 is in elastic contact with the stopper pin 60 due to the elasticity of the helical spring 64, the indicators 66 and 68 coincide, and the roller 4 at this time
The positions of the pins 60 and 62 are set in advance so that the center position of the pin 4 is the most moved in the C direction in FIG. Next, the knob 56 is rotated approximately 180 degrees in a direction opposite to the biasing rotation direction. As a result, the center of rotation of the roller 44 moves in the direction B in FIG. Operate the roller 46 side in the same way. Next, the vertical cursor 12 is moved to the end side of the vertical rail 8, and as shown in FIG. , 46 and 38 are located between the guide rails 22 and 24, move the vertical cursor 1
2 toward the center of the vertical rail 8. Next, when the knobs 56, 56' are released, the roller support shaft 50 rotates in the normal direction due to the elasticity of the helical spring 64, and the rollers 44, 46 come into elastic contact with the guide surface of the rail 22. The rollers 36 and 38 also come into elastic contact with the guide surface of the rail 24 due to the reaction force received from the rail 22 of 46. At this time, the stopper pin 62 faces the stopper 60 with a predetermined distance therebetween.
Note that if the eccentricity between the large diameter portion 50b and the small diameter portion 50c is small, even if the pressure increases between the rollers 44 and the rail 22, the roller support shaft 50 will rotate in the opposite direction due to the pressure. Never.

The above operation is the same when attaching the horizontal cursor 6 to the horizontal rail 4. User selects vertical cursor 12
When pulling it out from the vertical rail 8 and attaching it to the vertical rail 8 again, use the indicators 66 and 68 as a guide.
Turn the knobs 56, 56' half a turn against the elasticity of the spiral spring 64, and move the vertical cursor 12 to the vertical rail 8.
After inserting the rollers 44, 46 and 36, 3, if you let go of the knobs 56, 56', the rollers 44, 46 and 36, 3
Granted to 8. In addition, when implementing this invention,
The mechanism for locking the knobs 56, 56' to the cursor side is not particularly limited to the pins 60, 62, and the relationship between the indicators 66 and 68 is not particularly limited to that shown.

Furthermore, the spring that biases the roller support shaft in the rotational direction is
A helical spring, a spiral spring, or any other spring can be used as long as it can be arranged compactly around the roller support shaft.

As mentioned above, the present invention forms an eccentric roller support part on a roller support shaft that can freely rotate at a fixed position with respect to the cursor, and presses the roller against the rail surface by the rotational force acting on this roller support shaft. As a result, the roller can be brought into pressure contact with the rail surface with a resilient force corresponding to the rotational force on the roller support shaft, and there is an effect that the movement of the cursor along the rail can be made smooth.

[Brief explanation of the drawing]

The figures show preferred embodiments of the present invention, in which Fig. 1 is an overall plan view, Fig. 2 is a plan view, Fig. 3 is a sectional view, Fig. 4 is a partial bottom view, and Fig. 5 is a partial plan view. 6 is a front view of the parts, and FIG. 7 is a sectional view. 2...Drawing board, 4...Horizontal rail, 6...Horizontal cursor, 8...Vertical rail, 10...Tail roller, 12...
...Vertical cursor, 16... Head, 18, 20...
Ruler, 22, 24... Lateral vibration control guide rail, 2
6, 28...Horizontal rail surface, 30, 32, 34...
...Koro, 36,38...Sideways Koro, 40,42
...shaft, 44, 46 ... horizontal roller, 50 ... roller support shaft, 52 ... pipe section, 54 ... screw hole, 56 ...
...Knob, 58...Cap screw, 60, 62...
... Stopper pin, 64 ... Hanging spring, 6
6,68...Indicator.

Claims (1)

[Scope of utility model registration request] A rail-type flexible parallel ruler or rail in which the cursor rotatably supports multiple rollers for controlling lateral vibration, the surfaces of the rollers are in contact with the rail surface, and the cursor can be moved along the rail surface. In a roller mounting device for a rail cursor of a type coordinate analyzer, roller support shafts for supporting the rollers are erected on the cursor, and at least one of the roller support shafts is attached to the cursor. The at least one roller support shaft is provided with a roller support portion that is eccentric with respect to its rotational center axis, and at least one of the rollers is mounted on the roller support portion. A rail-type flexible parallel ruler or a rail cursor of a rail-type coordinate analyzer, characterized in that the rollers are rotatably fitted and a rotational force is applied to the at least one roller support shaft by a spring. Mounting device.