JPH0536718Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a balance weight roller adjustment method for adjusting the pressure against the lateral vibration control surface of the roller that regulates the lateral vibration of a balance weight such as a rail type flexible parallel ruler. Regarding equipment.

[Conventional technology]

Conventionally, one or two of the balance weight rollers that regulate horizontal wobbling with respect to the vertical rail are rotatably supported by a leaf spring, and the elasticity of the leaf spring causes the roller to bounce against the vertical rail surface of the vertical rail. are in contact with each other.

[Problem that the invention attempts to solve]

As mentioned above, in the case of a structure in which the rollers are pressed against the lateral vibration control surface by the leaf spring, lateral vibration may occur in the balance weight against the elasticity of the leaf spring, and in this case, the rollers and the lateral vibration There was a defect in that noise was generated between the plate spring and the regulating surface, and there was also a defect in that the rollers were deformed when the spring force of the leaf spring was increased.

The present invention aims to eliminate the above-mentioned defects.

[Effect]

In the above configuration, when a driver is inserted through the hole in the vertical rail 6 and the roller support shaft 54 is rotated by the driver, the adjustment roller 56 is vertically moved by the eccentric action of the eccentric shaft portion 54b of the roller support shaft 54. It moves relative to the balance weight 12 in a direction perpendicular to the lateral runout regulating surface 72 of the rail 6, and by this movement, the pressure of the adjustment roller 56 against the lateral deflection regulating surface 72 of the vertical rail 6 is adjusted to an arbitrary value. can do.

〔Example〕

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

In Figures 4 and 5, reference numeral 2 denotes a drawing board supported on a drafting table so that it can be set at any angle of inclination between horizontal and perpendicular to the floor, and the upper edge of this board A horizontal rail 4 is fixed to the horizontal rail 4.
One end of the vertical rail 6 is connected via the horizontal cursor so that it can move freely in the left-right direction in the figure and can swing within a plane perpendicular to the two surfaces of the drawing board. Lower guide rail parts 6b and 6c of the vertical rail 6 (see Figure 1)
A rotatably supported roller is brought into contact with the vertical cursor 8, and the vertical cursor 8 is movably connected to the lower part of the vertical rail 6 via the roller. A balance weight 12 is inserted into the weight insertion space 10 at the top of the vertical rail 6.
It is arranged so that it can run freely along the longitudinal direction.
A head 14 is attached to the vertical cursor 6, and a straightedge 18, 2 is attached to a ruler mounting plate 16 of the head 14.
0 is attached. The tail end of the vertical rail 6 is movably mounted on the drawing board 2 via a tail roller 22. Covers 24 and 26 made of plastic sticks are fixed to both ends of the vertical rail 6, and a wire rope 32 is stretched between rope pulleys 28 and 30 rotatably supported by the covers 24 and 26. weight 1
2 and a vertical cursor 8 are connected to each other so as to move in opposite directions along the vertical rail 6. As shown in FIGS. 1 and 2, magnets 34 and 36 are fixedly installed on both sides of the bottom surface of the balance weight 12, and the magnets 34 and 36 are connected to both sides of the bottom surface of the weight insertion space 10 of the vertical rail 6. Long magnets 38, 40 are fixedly installed along the entire longitudinal length of the magnets 38, 40.
The balance weight 12 is slightly raised above the bottom surface of the weight insertion space 10 due to the repulsive magnetic force acting between the balance weight 12 and the weight insertion space 10 . The balance weight 12
Near both longitudinal ends of the bottom surface of the balance weight 12, lateral vibration regulating rollers 42, 44 are rotatably supported by shafts 46, 48 about an axis perpendicular to the bottom surface of the balance weight 12. A tubular body 50 is fixed to the balance weight 12 perpendicularly to the upper and lower surfaces of the balance weight 12, located on the rollers 42 and 44 line. Said tube body 5
One end of the balance weight 12 is opened in the recessed part 52 on the upper surface side of the balance weight 12, and the other end is opened in the lower surface side of the balance weight 12. 54 is
A cylindrical roller mounting portion 54a, and an eccentric shaft portion 54b that is eccentric with respect to the cylindrical roller mounting portion 54a and has a thread cut on the outer peripheral surface.
and a collar portion 54c, and the roller mounting portion 54a of the support shaft 54 has an adjustment roller 56.
is rotatably fitted through a bearing 58 made of a radial ball bearing fitted thereto. The eccentric shaft portion 54b of the roller support shaft 54 is rotatably fitted into the tube body 50 as shown in FIG. 3, and the end of the roller support shaft 54 on the nut attachment side is
It is located within the recessed portion 52. The recessed part 5
A disc spring 58 and a washer 6 are attached to the eccentric shaft portion 54b in
0 and the nut 64 via the wave washer 62
are screwed together, and by the tightening force of the nut 64, both end surfaces of the inner ring of the bearing 58 are firmly clamped and fixed between the collar portion 54c of the roller support shaft 54 and the upper end surface of the tube body 50. . Grooves 66 and 68 are provided at both ends of the roller support shaft 54 for rotating it with a screwdriver.
is drilled. The surfaces of the rollers 44, 46 are in contact with one of a pair of lateral vibration regulating surfaces 70, 72 formed at the bottom of the weight insertion space 10 over the entire length in the longitudinal direction,
The surface of the adjusting roller 56 is in contact with the regulating surface 72 on the other side. The state of contact of these rollers 44, 46, 56 with respect to the regulating surfaces 70, 72 is set to be somewhat rough before adjustment. Driver insertion holes 74 and 76 for roller adjustment operation are transparently provided in the upper and lower walls of the vertical rail 6.
4 and 76 are positioned so as to exactly oppose both ends of the roller support shaft 54 when the balance weight 12 is moved to the locking position along the vertical rail 6.

In the above configuration, the rollers 44, 46, 56
To adjust the contact pressure against the regulating surfaces 70 and 72 of Position it directly below.
Next, a driver is inserted into the weight insertion space 10 through the hole 74 to rotate the roller support shaft 54. Due to this rotation of the roller support shaft 54, the center of the roller 56 is displaced relative to the vertical cursor 12 in a direction perpendicular to the longitudinal direction of the vertical cursor 12 in FIG. The rollers 42 and 44 are pressed against the regulating surface 70 by the reaction force of this pressing force. This pressure contact force can be arbitrarily adjusted by adjusting the amount of rotation of the roller support shaft 54. After the above-mentioned roller pressure adjustment work is completed, a decorative board 78 is stretched over the top surface of the vertical rail 6, and the hole 74 opened in the top surface of the vertical rail 6 is closed. Note that the roller pressure can also be adjusted through the holes 76 on the lower surface side of the vertical rail 6. Incidentally, the holes on the lower surface side of the vertical rail 6 may be formed in advance for fixing the balance weights.

In this embodiment, the disc spring 5 is attached to the roller support shaft 54.
8. Although the nut 64 is screwed together via the wave washer 62, it is also possible to use one plate spring 58 or one wave washer 62. These disc springs,
The wave washer constitutes the projectile.

〔effect〕

Since the present invention is configured as described above, the roller pressure of the lateral vibration regulating roller provided on the vertical cursor against the lateral vibration regulating surface of the vertical rail can be easily applied in a short time while the balance weight is housed in the weight insertion space of the vertical rail. In addition, since no leaf springs are used, it is possible to prevent noise from occurring due to lateral vibration when the balance weight is running.

[Brief explanation of the drawing]

1 is a sectional view, FIG. 2 is a bottom view, FIG. 3 is a sectional view, FIG. 4 is a plan view, and FIG. 5 is an explanatory view. 2... Drawing board, 4... Horizontal rail, 6... Vertical rail, 8... Vertical cursor, 10... Weight insertion space, 12... Balance weight, 14... Head, 18, 20... Straight ruler , 28, 30... rope pulley, 32... wire rope, 34, 36...
... Magnet, 38, 40 ... Magnet, 42, 44 ... Roller, 46, 48 ... Shaft, 50 ... Tube, 52 ...
Recessed portion, 54... Roller support shaft, 54a... Roller mounting portion, 54b... Eccentric shaft portion, 54c... Flange portion, 5
6... Adjustment roller, 58... Disc spring, 60... Washer, 62... Wave washer, 64... Nut, 66, 68... Groove, 70, 72... Lateral vibration control surface, 74, 76... Hole , 78... Decorative board.

Claims (1)

[Scope of utility model registration request] In a device for adjusting the abutting force of an adjustment roller 56 provided on a balance weight 12 against a lateral vibration control surface 72 of a vertical rail 6, the balance weight 1
2, the roller support shaft 54 has an eccentric shaft portion 54b that is eccentric with respect to the roller mounting portion 54a, and a groove for a driver is formed at the end. Locked and rotatably supported,
An adjusting roller 56 is rotatably attached to the roller mounting portion 54a of the roller support shaft 54, and the eccentric shaft portion 54
A nut 64 is screwed onto b, and an elastic body is inserted into the eccentric shaft portion 54b between the nut 64 and the balance weight 12 side, and a hole for inserting a driver is formed in the vertical rail 6. The roller support shaft 5
4. A balance weight roller adjustment device for a rail-type flexible parallel ruler, etc., characterized in that the grooves for the driver are formed opposite to each other on the movement line.