JPS5970902A - Method of measuring position of tooth of straight saw - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for measuring the position of saw teeth, particularly saw teeth, using measuring light.

For example, according to Swiss Patent No. 275,525, an alcohol level and associated graduated scale are used to determine the position of the teeth of a saw, so that the inclination of the teeth can be determined from a close-up view. It is known to be set to a desired value, as shown in FIG. The use of precision measuring intermediate pieces to increase the speed of repositioning is known, for example, from Finnish Patent No. 51440.

The use of light beams and directly readable graduations as an aid has already been known for a long time in a completely different technical field, namely in adjusting the inclination and toe-in of the front wheels of motor vehicles. For this purpose, the possibility of attaching a floodlight to the hub of the wheel (DE 1673848) or a reflector in each case (DE 2236695) has been suggested. In these cases, the device in question is very suitable because the wheels must be able to be rotated throughout the measurement.

The object of the invention is now also to apply the use of said light beam to the measurement of the position of saw teeth, in which case the tooth extraction can be oriented quickly and reliably. Additionally, the orientation is more accurate than before and no reorientation is required, thus avoiding additional failures.

The invention is characterized by what is disclosed in the appended claims.

The invention will be described in more detail with reference to the accompanying drawings.

It can be seen from the drawing that the alignment is done by using light beams. The light beam is specifically a laser,
It is strong enough to produce the required sharp measurement line or point. On the other hand, the device can be operated using even conventional light sources, although the use of conventional light sources generally requires rather short measurement intervals.

In FIG. 1, the oriented reed teeth are indicated by (5). The light transmission device (1), preferably a laser transmission device, comprises:
It is attached to the tooth extraction (5) by a suitable support or, for example, by a magnet. The light beams transmitted by these transmitting devices (1) start from the transmitting devices (1) in the figure and the measuring plate (
2) is indicated by the line reaching . In this particular embodiment, we have two such transmitting devices (1), the upper one transmitting one line, which reaches the vertical position of the measuring plate (2). The lower one also carries two lines that intersect each other at right angles, thus forming a grid.

On the measuring plate (2) there is a scale (3) with two scales.
1 (41), they are used as an aid for the orientation of tooth extraction (5). If so, it is pre-calibrated so that you will automatically know when adjustments are needed.

Indicates whether the cutting edge is further advanced in the cutting direction than the other end.

At this time, if the upper end of the extracted tooth (5) is tilted in the moving direction or in the opposite direction to the moving direction, the horizontal line of the transmission device (1) horizontally installed on the extracted tooth (5) will rise or fall. do. Regarding the measure (4), it is adapted to indicate the inclination of the tooth extraction (5) in the direction perpendicular to the direction of movement. In other words, it can be used, for example, to check whether the lower end of the tooth extraction (5) has moved laterally from the cutting surface where it is supposed to be. If movement occurs, the plate to be cut will not be of equal thickness and will be thicker at one end than the other. In this case there is a difference between the readings of both scales (4) at the upper and lower horizontal positions on the measuring plate (2). On the other hand, if the readings deviate from the upper and lower end measurements (4) in the same direction and by the same amount, then the horizontal sides of the tooth extraction (5) are not in the same direction with respect to the direction of movement of the wood, and these directions are at an angle to each other. It means that. This causes tooth extraction (5) to receive a very large torque and easily break.

FIG. 2 shows an apparatus for carrying out the modification.

In this embodiment, the transmission device (1) is not attached to the tooth extraction (5), but a reflector (7) is attached to the tooth extraction (5). The reflector (7) is provided with a sufficiently long guide so that the position is exactly the same each time.

On the other hand, the transmitting device (1) is placed on the back side of the measuring plate (2), from where the transmitting device (1) transmits their light rays through the slit (6) to the reflector (7) and their It is reflected and transmitted from the surface onto the measuring plate (2). (3) shows the slope known from the previous example. If there is an inclination in both the moving direction and the opposite direction, and there is a vertical difference between the departing ray, that is, the slit (6), and the arriving ray, the offset will be as shown in (3) in the figure. It is indicated by. (4) from the center line, whereby the appropriate slit (6) is selected in advance. Thus, an increase and a decrease in the difference (4) are respectively observed to detect misorientation.

Since the vertical difference (3) depends on the vertical position of the reflector (7) above the extraction tooth (5), the extraction difference (3) is also in order to avoid the situation where the reaching point is the slit (6). Then, by fully moving the reflecting mirror (7), it can be adjusted to an appropriate value N'1. In this way, if the comma is no longer visible within the gap, factors that would otherwise not be present are removed.

In connection with the second embodiment, only the use of a point-like beam signal has been described above, but even this embodiment does not prevent the use of a transmission device (1) that transmits a linear beam. do not have.

In such a case, however, it will be necessary to deviate some length from the structure of the device. This is because the vertical line of light must also have its own slit in the measuring plate (2). When the second embodiment using the reflector (7) described above is used, it is about twice as accurate as the device of the first embodiment. This is on the condition that the measuring plate (2) has the same length from the tooth extraction (5) as in the first embodiment.
This is due to the fact that the rays travel twice as far as in the first embodiment.

The position of the measuring plate (2) is not at all critical, since the distance from the tooth extraction (5) can be, for example, between 5 and 50,771 cm. Very great accuracy is not achieved when using the measuring plate (2) with pressure sections shorter than 5 m. In addition, when using the measuring plate (2) at a distance of 30 m or more,
High demands are placed on the optical systems used. Thus, within the above-mentioned distance range, the device is sufficiently simple in construction and accurate.

[Brief explanation of drawings]

FIG. 1 shows the equipment necessary to carry out the measuring method of the invention, and FIG. 2 shows the apparatus necessary to carry out a variant of the measuring method. (1)...Light transmission device (2)...Measurement plate +31 (41...Measurement board (5)...Teeth (6)... Slit (7)・・・Reflector

Claims (1)

[Claims] 1. In a method for measuring the position of saw teeth, especially reed teeth, using measurement light, in order to determine the arrangement of the teeth in at least two orthogonal directions, The light beam of at least one light transmitting device attached to the tooth is directed to a measuring scale on a measuring plate located at a distance from the tooth; A method for measuring the position of a saw tooth, in particular a saw tooth, using a measuring light, characterized in that it is reflected onto the measuring graduation via at least one reflector. 2. Measuring method according to claim 1, characterized in that two transmission devices and, in the case of reflection, also two reflectors are used. 3. The measuring method according to claim 1 or 2, wherein the light used is a laser. 4. The transmission device or the reflector is magnetically attached to the tooth. The measuring method according to any one of claims 1 to 6, characterized in that: 5. Claims 1 to 4, characterized in that the transmission device transmits point-like or linear light rays, or grid-like light rays consisting of two mutually orthogonal lines, or a combination thereof. The measurement method described in any one of paragraphs. 6. The measuring method according to any one of claims 1 to 5, wherein the distance between the tooth and the measuring plate is 5 to 30 nL.