JPS6111030Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a linear scale guide device for a line drawing machine, a drafting machine, etc.

As a means of detecting the amount of movement of a moving object holding a scale, wire drawing tool, etc. relative to a guide rail, it is possible to mechanically convert the linear motion of the moving object or to detect voltage changes due to the movement of a contact terminal to an electrical resistance wire. You can also use a potentiometer to detect
Considering conditions such as durability, accuracy, prevention of detection, and simplification of structure, it is possible to fix the linear scale directly along the guide rail and connect the index scale and optical detection element installed on the moving body. Preferably, the means is configured such that the amount of movement is automatically read by detecting it with an encoder consisting of an encoder, inputting this to an up/down counter via a Schmitt circuit, a direction selection circuit, a polarity reversing circuit, etc.

By the way, if the linear scale is constructed of a flexible band-shaped scale such as a thin stainless steel band with slits etched into it, it can be used in a drawing machine, which may be used relatively roughly.
In wire drawing machines and the like, if a linear scale does not accurately pass between detection units provided on a moving body, reading errors will occur.

Therefore, the present invention aims to provide a linear scale guide device for line drawing machines, drafting machines, etc., which allows a linear scale to accurately pass through a detection section consisting of an index scale and a pair of photoelectric elements. .

The present invention will be explained in detail with reference to the embodiments shown below. Reference numeral 1 is a linear scale made of a thin stainless steel strip with slits 1a formed by etching, and both ends of the scale are integrally fixed to the fixed pieces 3 of the guide rail 2. be. The linear scale 1 is provided parallel to the vertical rail surface 2a of the guide rail 2, and has a slit 1a occupying its upper and lower center. 4 is a moving body rotatably equipped with four horizontal rollers 5, and the horizontal rollers 5 are connected to the guide rail 2.
The movable body 4 is movably guided along the lower surface of the guide rail 2 by engaging and rolling on the vertical rail surface 2a of the guide rail 2. The movable body 4 is provided with a wire drawing tool, a scale operation head, or a connection mechanism with other guide rails, as well as a brake device, but these are omitted in the figure. Reference numeral 6 denotes a detection unit fixedly installed on the movable body 4, in which two pairs of light emitting elements 7 and light receiving elements 8 are provided with slits 1a facing each other, and an index scale 9 is provided on the side of the light receiving elements 8. is fixed. That is, as the moving body 4 moves, the linear scale 1 is configured to pass between the light emitting element 7 and the light receiving element 8 of the detection section 6 and the index scale 9.

Here, the device of the present invention has guide rollers 1 that come into contact with the linear scale 1 on both sides of the detection section 6.
0 and 11 are provided so that the linear scale 1 can be accurately guided between the detection parts 6. In the case of the embodiment, a pair of guide rollers 10 and 11 are configured to roll while holding the linear scale 1 from both sides. Further, each guide roller 10, 11 has a notch 10a, 11a in a portion facing the slit 1a.
, and is configured such that its upper and lower roller portions 10b, 11b abut against the linear scale 1.
Reference numerals 10c and 11c are roller support shafts that rotatably support the respective guide rollers 10 and 11 on the movable plate 4.

According to the device of the present invention having the above configuration, the guide rollers 10 and 11 are in contact with the linear scale 1, which is fixed at both ends to the guide rail and is provided along the longitudinal direction of the guide rail, on both sides of the detection section. Since the linear scale is accurately sent between the detection parts, the linear scale does not lose its linearity even when the moving object moves suddenly, allowing smooth movement and reducing reading errors. It has the effect of preventing the occurrence.

[Brief explanation of the drawing]

Fig. 1 is a plan view of one embodiment of the device of the present invention;
The figure is a schematic front view thereof, and FIG. 3 is a schematic side view thereof. 1... Linear scale, 2... Guide rail, 4
. . . Moving object, 6 . . . Detecting section, 10, 11 . . . Guide roller.

Claims (1)

[Scope of utility model registration request] A moving body that guides other guide rails, wire drawing tools, scales, etc. is provided along the length of the guide rail, and a band-shaped linear scale is fixed at both ends along the guide rail, while the moving body is In a rail-type line drawing machine, drafting machine, etc., which is provided with a detection unit consisting of an index scale and a pair of photoelectric elements opposite to the linear scale, and is capable of detecting the amount of movement of a moving object, the detection unit A linear scale guide device for a wire drawing machine, a drafting machine, etc., which is provided with guide rollers located on both sides of the scale and in contact with the linear scale.