JPS6113283Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic driving device for a material transport vehicle that moves the material transport vehicle forward and backward based on the front and rear ends of the material.

Conventionally, automatic operation of a material transport vehicle is known, for example from Japanese Patent Publication No. 40-8316. The material transport vehicle is based on a material transport vehicle standard type in which the rotation of the material transport vehicle drive mechanism is switched by the operation of the detection means, and the material transport vehicle moves forward or backward within the range regulated by the detector, so it is difficult to load wood onto the material transport vehicle. If the positions are uneven, the wood transport vehicle will move backwards before the material is finished sawing and splitting, resulting in unmilled material, so either align the loading position of the wood onto the material transport vehicle accurately, or The reciprocating range of the lumber truck is widened to prevent the above-mentioned unsawn material, but aligning the lumber loading positions not only requires a lot of labor but also takes a lot of time. The work is highly dangerous because the work is performed in front of the band saw.Also, when the reciprocating range of the material truck is expanded, it does not require manpower to load the timber, but the work is difficult because the material vehicle makes a lot of unnecessary movement. This is uneconomical as it reduces efficiency and wastes power.Furthermore, in this type of equipment, the material feed wheel is fed at high speed from the moment the band saw cuts into the material. There were drawbacks such as the inability to saw wood.

The present invention detects both ends of the material and sets the advance and retreat range of the material transport vehicle based on this, so that even if the wood is unevenly loaded onto the material transport vehicle, the material will be removed from the band saw after sawing and splitting. The lumber truck always moves backwards before the lumber comes off, and the range of reciprocation is kept to the minimum necessary, resulting in high work efficiency and no redundant power costs.In addition, the lumber can be loaded onto the lumber truck automatically. , is effective in saving labor and increasing safety, and is also effective in cutting the material with the bandsaw at a low feed speed, and then switching to a high speed to ensure accurate sawing of the material. The purpose is to provide driving equipment.

Next, the present invention will be explained below based on the drawings.

In Figure 1 of the drawing, 1 is the frame of the bandsaw machine,
A pair of saw wheels 2 and 3 are disposed above and below the saw wheels 2 and 3, a band saw 4 is suspended between the saw wheels 2 and 3, the band saw 4 is tensioned by a known tensioning means 5, and is driven by the lower saw wheel 3. let

In the figure, reference numerals 6 and 6 denote rails laid parallel to the extension line of the band saw 4 on the sides of the band saw machine, one of which is flat and the other is chevron-shaped.

Reference numeral 7 denotes a material transport vehicle in which running wheels 8, 8 are engaged with the rails 6, 6, and a plurality of sliding tables 9 are arranged at predetermined intervals on the upper part of the vehicle. 10
Walking means 11 such as a pinion rack driven by
A wood support case 12 that moves forward and backward is placed thereon, and each wood support case 12 is equipped with upper and lower sieves 14, 14 for gripping the material 13.

In FIG. 2, reference numeral 15 denotes an advancing/retracting mechanism for advancing and retracting the material conveying vehicle 7, which uses a variable speed reversible motor with a brake, and transmits its rotation to a drum 18 around which a advancing/retracting cable 17 is wound through a belt 16. is rotated in the forward or backward direction to advance and retreat the lumber wheel 7.The forward movement of the lumber car 7 provides low-speed feed for cutting and high-speed feed for sawn wood, and the backward movement is even faster than for sawn wood. It is designed to move quickly.

Reference numerals 19 and 19 are detection means that are provided on the front side with respect to the cutting direction of the band saw 4 and detect the front and rear ends of the material 13. Light is passed from the light emitting side to the light receiving side on the extension line of the band saw 4, and this light is detected. Although it is not shown in the drawing, it is possible to use a photoelectric switch that emits a detection signal when the material is blocked or passes through.
A capacitance switch or the like is used that generates a detection signal based on the change in capacitance caused by passage.

Reference numeral 20 denotes a pulse transmitter installed in the above-mentioned material transport vehicle advance/retreat mechanism 15, which generates pulses proportional to the moving distance regardless of the moving speed of the material transport vehicle 7, and inputs the pulses to a delay controller to be described later.

In FIG. 4, 21 indicates the detection means 19, 19.
A shift delay controller that provides a desired time delay between the detection timing by the shift controller and the shift timing by the shift controller described later, with a number or time as a delay value, and a detection means 19,
19 detects the front end of the material, the material transport vehicle 7 advances a certain distance at low speed, and then activates a speed change controller to be described later to convert the material transport vehicle 7 to high speed forward movement.
When the detection means 19, 19 detect the rear end of the material, after the material transport vehicle 7 has advanced a certain distance at high speed,
The speed change controller is operated to convert the material transport vehicle 7 into a low-speed forward movement, and when adjusting the advancing or retreating speed of the material transport vehicle 7, the pulse transmitter is used in order to obtain a constant moving distance regardless of this. A pulse counter which performs delay control by receiving pulses from 20 is used, and when the advancing and retreating speed of the material transport vehicle 7 is not changed, a timer is used which performs delay control by setting a delay value by time.

Reference numeral 22 denotes a speed change controller that converts the forward and backward speed of the material transport vehicle 7 by the advance/retreat mechanism 15 from low speed to high speed. The speed is converted from high speed to low speed at the end, and when the material transport vehicle 7 is retracting, it maintains a high speed from the beginning to the end, and decelerates just before stopping at the retracting end.

Reference numeral 23 denotes a direction controller that switches the advancing/retracting mechanism 15 between forward operation and backward operation, and when the material transport vehicle 7 is moving forward, the delay controller 21 is activated when the rear end of the material is detected by the detection means 19, 19, and the sawing is finished. After that, the operation is switched to the backward operation, and when the material transport vehicle 7 returns to the starting position, the operation is switched to the forward operation by a detector described later.

24 is a detector that detects when the material transport vehicle 7 has returned to the starting position, and a limit switch, a proximity switch, etc. are attached to the material transport vehicle 7 and are used, and when this is operated by the operator 25, the detector 24 causes the material transport vehicle 7 to move forward; Controller 2 that causes the advance/retreat mechanism 15 to move forward at low speed after walking
Activate 6.

This detector 24 detects the front end of the material by using the same detection means 19, 19 as described above, and activates another delay controller 21 provided separately by the detection signal to control the delay. Controller 2
After the material transport vehicle 7 returns to the starting position according to step 1, the low speed advance controller 26 is activated to switch to low speed forward movement. This allows the reciprocating range of the material transport vehicle 7 to be further narrowed.

Reference numeral 27 denotes an operation panel for the sawing device, which is placed at the rear of the bandsaw machine with respect to the material feeding direction, and on its surface there are various operation switches a, an indicator light b, an indicator c for walking distance and remaining size, and A regulator d etc. are arranged, and the above-mentioned delay controller 21 and a speed change controller 2 operated by the delay controller 2 are installed inside.
2. If you install a sequence programmer, etc. that operates the direction controller 23, other controllers, and auxiliary equipment in a predetermined order and select automatic operation, all operations will be performed continuously and automatically according to the required program. Also, if manual operation is selected, manual operation is also performed.

28 is an offset means installed on the shaft 29 of the wheel 8 of the material transport vehicle 7 as shown in FIG.
When the material transport vehicle 7 moves backward, the material transport vehicle 7 is moved to the side so that the material 13 is separated from the band saw 4, and is returned to the normal position when moving forward.

Reference numeral 31 denotes a feeding means for feeding the material 13 to the material transport vehicle 7, and transfers the materials 13 arranged thereon onto the material transport vehicle 7 from the one in front. Reference numeral 32 denotes a wood turning means installed on the material transport vehicle 7, which pushes up and rotates the material 13 on the sliding table 9, and positions the material 13 so that the material 13 can be sawn with high quality and yield. be.

FIG. 5 is a flowchart showing the control state of the material transport vehicle 7, where the horizontal axis represents the time for each operation, T ₁ ,
Indicated by T ₂ , T ₃ , T ₄ , T ₅ ... T ₁₁ , T ₁₂ , T ₁₃ ,
On the vertical axis, the forward speed of the material transport vehicle is shown upward as S ₁ , S ₂ ,
The speed of retreat downwards is indicated by S ₃ .

The apparatus configured as described above feeds the material 13 onto the material transport vehicle 7 at the start position by the feeding means 31, fixes it to the wood support case 12 by the gags 14, 14, and prepares for sawing. After the completion of the process, the material conveying car 7 is automatically operated based on the program of the sequence programmer. This operating state will be explained based on the flowchart shown in FIG.

When the start switch on the operation panel 27 is turned on to start automatic operation, the walking means 11 moves the wood support casing 12 between 0 and _T1 , and along with this, the advancing/retracting mechanism 15 moves at a low speed. It operates and transports the material truck 7.
The material 13 is advanced at a low speed _S1 from _{T1 to} T4, and is biased forward by the offset means 28. During this time, at _T2 , the front end of the material 13 on the material conveying wheel 7 acts on the detection means 19, 19. , transmits the detection signal of the front end of the material 13 to the delay controller 21, starts this delay controller 21, and the material transport vehicle 7 moves forward at low speed.
At T ₃ , slowly press the material 13 onto the band saw 4, and move the band saw 4 to the material 13 without causing any movement.
Cut into the hole and start sawing. At this time, the delay controller 21 operates the speed change controller 22 during the set speed change delay time _T4 , and switches the advancement/retraction mechanism 15 to high-speed operation. For this reason, the material transport vehicle 7 is advanced at high speed from T ₄ to T ₆ , and while sawing material by the band saw 4 at high speed, at T ₅ when the material is nearing its end, a detection means 19 is detected at the rear end of the material. , 19, transmits a detection signal to the delay controller 21 to activate it, and at T ₆ , the speed change controller 22 is activated,
In order to switch the advancement/retraction mechanism 15 to low speed operation, the material transport vehicle 7 moves forward at low speed, and at T ₇ the teeth of the band saw 4 come off the material 13 and the sawing ends, and at T ₈ the rear of the band saw 4 comes off the material 13. The material transport vehicle 7 is temporarily stopped before it comes off. At this time, at the shift setting time _T9 set by the delay controller 21,
The direction controller 23 and the speed change controller 22 are operated to move the material transport vehicle 7 backward at a high speed from T ₉ to T ₁₀ , and the offset means 28 causes the material transport vehicle 7 to move backward at T ₁₀ . When the rearward end, that is, the start position is reached, the shift controller 22 is activated by the operation of the detector 24 by the operator 25, and the forward/backward mechanism 15 is activated.
In order to switch to low-speed operation, the material transport vehicle 7 moves to low-speed backward movement, and the walking means ₁₁ takes a step forward.At T11, this step is completed, and at _T12 , the material transport vehicle 7 is stopped. At _T13 , the forward movement of the material transport vehicle 7 is started in the same manner as at _T1 , and the offset means 28 is caused to perform forward bias, and thereafter _T2 , _T3 , _T4 ... _T11 , T ₁₂ , the above-mentioned operation is repeated, and the material is continuously and automatically sawn while reciprocating over the shortest distance.

Since the device related to the present invention is constructed as described above, the range of advance and retreat of the material transport vehicle is narrowed so that the edge of the material does not come off the band saw, and unnecessary movement of the material transport vehicle is eliminated, thereby increasing work efficiency. Not only can a wide increase in width be measured, but when the detection means detects the end of the material and sets the advance/retreat range of the material transport vehicle, the position of loading the timber onto the material transport vehicle may be uneven.
Automate the loading work to save labor and improve efficiency.
It is possible to improve safety, and if the end of the material is detected by the detection means, the feed speed of the material conveying car can be slowed down until the band saw cuts into the material, and then changed to speed up after the band saw cuts into the material. In addition to eliminating the movement of the saw during cutting to ensure accurate sawing, if the saw stabilizes as it cuts, it is possible to increase the feeding speed and increase the sawn efficiency, making it easier for experienced workers. This has the unique effect of making it possible to reliably carry out high-level sawn timber operations unattended.

[Brief explanation of the drawing]

FIG. 1 is a front view of a sawing machine that employs the device related to the present invention. Figure 2 is a plan view. FIG. 3 is an explanatory diagram showing the advance and retreat of the material transport vehicle. Figure 4 is a wiring diagram of the main parts of the device. FIG. 5 is a flowchart showing the operating state of the material transport vehicle. In the figure, 4 is a band saw, 7 is a material feed vehicle, 19 is a material edge detection means, 15 is an advance/retreat mechanism, 22 is a speed change controller, 23 is a direction controller, and 21 is a delay controller.

Claims (1)

[Scope of utility model registration request] The material transport vehicle moves back and forth parallel to the sawing path of the band saw.
A detection means for detecting the front end and the rear end of the material sent toward the band saw on the front side with respect to the cutting direction of the band saw, an advancement mechanism for advancing and retracting the material feeding vehicle, and a feeding speed of the advancement and retreat mechanism. A speed change controller that changes from low speed to high speed, a direction controller that changes the feeding direction of the advancing/retracting mechanism from forward to backward, and a front edge detection signal of the material from the above-mentioned detection means is activated to cause the band saw to cut into the material. Later, the speed change controller increases the speed of the advance/retreat mechanism, and the directional controller is activated by a signal to detect the trailing edge of the material from the detection means, causing the direction controller to reverse the advance/retreat mechanism before the material comes off the band saw. An automatic driving device for a material transport vehicle, characterized in that it is equipped with a delay controller.