JPH0618251A - Device for measuring the shape of irregularly shaped plate-like objects - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an inexpensive and practical device capable of accurately measuring the shape of an irregularly shaped plate-like object obtained in the intermediate step of lumbering. [Structure] In a device for measuring the shape of an irregularly shaped plate-like object (12) sequentially conveyed along a constant guide path (11), an object to be measured (12) whose lower surface (3a) is conveyed It is equipped with a lifting shoe (3) that can be lifted up and down so as to come into contact with the surface, and a surface detector (8) mounted on the lower surface of the lifting shoe (3) at a position where it contacts the object to be measured (12). It is characterized by Usually, a large number of the lifting shoes (3) are arranged along the longitudinal direction of the object to be measured (12). With the above-mentioned device, the profile of the object to be measured can be obtained from the relationship between the period during which the surface detector of the lifting shoe is in contact with the object to be measured and the amount of movement of the object to be measured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the shape of an irregularly shaped plate-like object, and more particularly to a measuring apparatus preferably used for measuring a semi-finished product or the like produced in a sawing process.

[0002]

2. Description of the Related Art For example, when trying to obtain timber by lumbering raw wood, first, the raw wood is ground to obtain a plate having a desired thickness, and the plate is further ground to form a square.
In order to maximize the lumbering efficiency, it is necessary to measure the shape of the plate material that is an intermediate product, especially the contour shape on the side where the width of the plate is narrow, and to find the optimum grinding method. There was no practical device that could be used. The reason, that is, the factor that makes the measurement difficult is that the shape of the plate material is extremely indeterminate and the contours on the front and back sides are different. Both sides of the board are not shaped and are arcuate and covered with bark. There are annual rings, the color tone is complicated, and there are knots, cavities, worms, etc. The thickness is uneven, and the warp and twist are large. And so on. For the above purpose, it is necessary to measure the surface shape of the smaller surface area of the front and back surfaces of the plate, but it is particularly difficult to measure the shape on this side.

For this reason, conventionally, this work has been performed depending on the intuition and experience of a skilled person, but this work is labor intensive and dangerous, and the lumber efficiency is not always maximized. It has also been proposed that an intermediate step be provided to cut off one side of the plate to shape it, and perform final lumbering with that side as a reference, but this method significantly reduces the utilization efficiency of the material. .

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to obtain an irregular shaped plate-like object obtained in an intermediate step of lumber. An object is to provide an inexpensive and practical device capable of accurately measuring a shape.

[0005]

The above object of the present invention is to:
In an apparatus for measuring the shape of an irregularly shaped plate-like object that is sequentially conveyed along a certain guide path, an elevating shoe that is provided so that its lower surface comes in contact with an object to be measured to be conveyed, and It can be achieved by an apparatus for measuring the shape of an irregularly shaped plate-like object, comprising a surface detector mounted on the lower surface of the lifting shoe at a position in contact with the object to be measured. Usually, a plurality of lift shoes to which the above-mentioned surface detector is attached are arranged along the longitudinal direction of the object to be measured. Also,
It is recommended that the upstream and downstream surfaces of the lower surface of the lifting shoe be curved or slanted along the conveyance direction of the object to be measured, and as the surface detector attached to the lower surface of the lifting shoe, a detection lever and It is recommended to use the one with a microswitch.

[0006]

In the device as described above, the lifting shoe touches and lifts the object to be measured sent at a constant speed, and the surface detector on the lower surface thereof touches the object to be measured and emits a signal. By recording the state of the actuator of the carrier device at that time, and then the signal is interrupted when the object to be measured continuously moves and leaves the surface detector, by comparing the state of the actuator at this time with the previous state, The shape of the lifting shoe along the traveling direction of the measured object can be known. A large number of such devices are arranged in the longitudinal direction of the object to be measured, and data from each device is aggregated to measure the entire shape of the object to be measured.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings.
FIG. 1 is a sectional view showing the configuration of the shape measuring apparatus according to the present invention. Thus, in the figure, 1 is a support frame fixed to a machine base (not shown), 2 is a guide rail, 3 is a lifting shoe,
An elevating shoe 3 is attached to the lower end of the elevating shoe 4, and an elevating shoe attaching rod 5 is attached to the elevating shoe 3 along the guide rail 2 so that one end of the elevating shoe attaching rod 4 is fastened to the upper end of the elevating shoe attaching rod 4 and the other end is a counterweight. 6 is suspended, and a rope is wound around pulleys 7 and 7 attached to the support frame 1, 8 is a surface detector, 9 is its detection lever, 10 is a microswitch, and 11 is a plate material as the object to be measured.
There are 12 transport paths. The plate member 12 is long in the direction perpendicular to the plane of the drawing, and in the drawing, a cross section perpendicular to the axis of the elongated plate member is drawn.

[0008] Actually, this device is a plate material to be conveyed.
Although many are arranged in the longitudinal direction of 12, only one set is shown here in order to avoid complication of illustration.
Further, this measuring device is provided between a device for sawing a raw wood into a board and a device for further sawing the board into a lumber. The plate material 12 is carried on the carrying path 11 from the left side to the right side in the drawing by a known carrying device (not shown), such as a carriage or a hydraulic cylinder.

The support frame 1 is attached to a machine base (not shown), and the elevating shoe attachment rod 4 is moved up and down along the guide rails 2 attached thereto. The weight of the counterweight 6 is somewhat lighter than the total weight of the lifting shoe 3, the surface detector 8, the lifting shoe mounting rod 4 and the like. If left unattended, the lifting shoe 3 and the like descend by its own weight, but from the bottom to the lifting shoe 3. When a force is applied, the lifting shoe 3 is lifted by the action of the counterweight 6 with a relatively light force. However, the weight of the counterweight 6 is set to such an extent that the elevating shoe 3 will not jump up by a slight force from below. That is, the weight of the counterweight 6 is set so that the lifting shoe 3 can be lifted lightly when the plate material 12 comes into contact with the left end inclined surface 3b of the lower surface of the lifting shoe 3, but the lifting shoe 3 does not lift from the plate material 12. To adjust.

As shown, the lower surface of the lifting shoe 3 is
Surfaces 3b on the upstream side and the downstream side along the conveyance direction of the plate material 12 and
3c is curved or slanted in a sled shape, and its lowest surface 3a
A hole 3d through which the tip of the detection lever 9 projects is formed in the hole. The main body of the detection lever 9 is formed by bending a flat plate, one end of which is rotatably supported by a pivot shaft 9a, and a contact roller 9b is attached to its free end. Further, 9c is a screw for operating the micro switch, and 9d and 9e are stoppers.

When the plate member 12 is propelled to the right in the drawing from the state shown in FIG. 1, the right shoulder of the plate member 12 eventually hits the inclined surface 3b of the elevating shoe 3 and gradually pushes up the elevating shoe 3. Then, when the plate material 12 moves further to the right, it comes into contact with the contact roller 9b at the free end of the detection lever 9 and pushes it up, so that the micro switch 10 is pressed via the screw 9c to operate, and a signal is transmitted. Occur. In that case, the drive amount from the original position of the actuator that conveys the plate 12 when the signal is transmitted is recorded, and the position of the right shoulder of the plate 12 is known from this. As described above, this device is arranged in a large number at predetermined intervals in the longitudinal direction of the plate member 12, and the right side along the longitudinal direction of the plate member 12 based on the driving amount of the actuator when the signal of the micro switch of each device is generated. The profile of is known.

When the plate 12 further advances and its left shoulder passes the position of the contact roller 9b of the detection lever 9, the micro switch 10 is turned off, and similarly to the above, from the original position of the actuator when each micro switch is turned off. The profile on the left side along the longitudinal direction of the plate member 12 is known based on the driving amount of. These data are input to a computer (not shown), and the optimum cutting method for sawmill efficiency is calculated there. In the meantime, the plate material 10 is carried to the next-stage lumbering apparatus, and is cut by the rotary saw positioned by the instruction of the computer so as to maximize the lumbering efficiency, and becomes a lumber.

Incidentally, as is already clear from the above description,
The configuration of the present invention is not limited to the above embodiment,
For example, this measuring device can be widely used for measuring the shape of various plate-shaped objects other than wood, such as certain agricultural products, marine products, and building materials, and the shape of the lifting shoe is also shown. Instead of a bowl-shaped one like this, a ski-like shape with both ends warped or long leaf springs is sufficient, and wheels, casters, and rollers are in contact with the object to be measured. And the like, and the lifting means of the lifting shoe is not limited to the guide rail, and the lifting shoe mounting rod may be slid and moved in the vertically oriented cylinder. A spring may be used instead of the above, or it may be omitted if the arm is lightweight. Furthermore, in addition to the micro switch, the device for detecting the surface of the measured object may be an air micro device. Data and close the relay, which known surface detectors are widely available, such as optical detectors,
The configuration of the present invention includes all these modifications within the scope of the object of the present invention.

[0014]

Since the present invention is constructed as described above, according to the present invention, an apparatus capable of accurately measuring the shape of an indefinite plate-like object having a shape such as a semifinished product of lumber is extremely inexpensive. Can be provided.

[Brief description of drawings]

FIG. 1 is a sectional view showing the configuration of an embodiment of a shape measuring apparatus according to the present invention.

[Explanation of symbols]

 1 Support Frame 2 Guide Rail 3 Lifting Shoe 4 Lifting Shoe Mounting Rod 5 Rope 6 Counter Weight 7 Pulley 8 Surface Detector 9 Detection Lever 10 Micro Switch 11 Transport Path 12 Plate Material

Claims (4)

[Claims] 1. An apparatus for measuring the shape of an irregularly shaped plate-like object (12) successively conveyed along a constant guide path (11), the lower surface (3a) of which is an object to be measured ( 12) Lifting shoe (3) that can be raised and lowered so that it contacts the
An apparatus for measuring the shape of an irregularly shaped plate-like object, comprising: a surface detector (8) attached to the lower surface of (3) at a position in contact with the object to be measured (12). 2. The shape of an irregularly shaped plate-like object according to claim 1, wherein a plurality of lifting shoes (3) each having a surface detector (8) attached are arranged along the longitudinal direction of the object to be measured (12). Measuring device. 3. The surface (3b, 3c) on the upstream side and the downstream side (3b, 3c) of the lower surface of the lifting shoe (3) curved or slanted in the conveying direction of the object (12) to be measured. 2. An apparatus for measuring the shape of an irregularly shaped plate-shaped object. 4. The surface detector (8) has a detection lever (9) and a microswitch (10) for measuring the shape of an irregular plate-shaped object according to any one of claims 1 to 3. apparatus.