JPS6213245B2 - - Google Patents

Description

Detailed Description of the Invention In particular, from a state in which long pieces of wood of the same thickness and uneven width are stacked in a block shape, the long pieces of wood are taken out one by one from the take-out side of the top row, and a wood processing machine is used. This relates to an automatic wood supply device that feeds wood to etc.

Conventionally, as an automatic lumber supply device, a suction device (similar in structure to the suction cup in a vacuum suction device, but constantly sucking air with a blower) holds the object by using the air suction action of a blower to hold objects in blocks of laminated long wood. There is a mechanism for sequentially taking out the object from the upper layer (there is no need for the smoothness of the object to be sucked, which is required in a vacuum suction device).

However, this conventional automatic wood supply device is difficult to put into practical use unless the long wood to be fed is all of the same length. That is, the movement control of the suction device can be set in advance according to the regular-sized long wood, but when the supplied wood is an irregular-sized long wood (the width is different in the longitudinal direction even if the thickness is the same) , or the width of each piece of wood varies), the positioning of the suction device cannot be set in advance. Therefore, proper application of the suction device to the long wood to be supplied cannot be automated, and it is necessary to manually correct the position of the suction device with respect to the long wood to be supplied each time the wood is supplied.

The object of the present invention is to independently control the positioning of the suction device at a plurality of locations on the long wood to be supplied. The objective is to obtain a more regular automatic supply of long wood.

The present invention will be specifically described below with reference to the illustrated embodiments. FIGS. 1 and 2 are a front view and a plan view showing an embodiment of the present invention, and 1 is an outer frame in which the apparatus of the present invention is installed. A roller 2 serves to transport the wood placed thereon to a processing section (not shown), is attached to the outer frame 1, and is rotated in a fixed direction by a drive device (not shown). A beam 3 is attached to the lower side of the outer frame 1.
4 and 5 are sprocket wheels, which are supported by the tip of the beam 3 and the outer frame 1, respectively, and a chain 6 is hung between the two, and the upper part of the chain 6 is located at a position slightly higher than the plane height of the beam 3. It is configured to come. The sprockets are driven by an electric motor 7, which drives the upper part of the chain 6 toward one direction of the outer frame, and a plurality of sets are provided in parallel according to the length of the long wood to be described later. . W is a long wood block, in which a large number of irregularly shaped long pieces (long pieces of wood with equal thickness and uneven width) are stacked in a direction in which the longitudinal direction is perpendicular to the supply direction, as shown in the figure. It has a block shape, is placed from the outer end of the beam 3, and moves toward the outer frame 1 as the chain 6 is driven. 8
is a lifting piece for the long wooden block W, which is moved up and down along a guide frame 9 attached to the outer frame 1. This lifting piece 8 then engages with the chain 10, and the chain 10 is connected to the sprocket wheels 11-12.
The sprocket 15 is driven by an electric motor 16. These lifting pieces 8 and this driving device are provided in plural sets (two sets in the embodiment) according to the lengths of the long timbers W ₁ , W ₂ . There is. 17,17'
are suction devices mounted so as to extend along the beams 18 and 18', respectively. The adsorption devices 17 and 17' each have a cylinder 1.
9 and 19', and are fixed at one location on chains 20 and 20', which are hung on sprockets 21, 21', 22 and 22', respectively. Reference numerals 23 and 23' denote electric motors that drive sprockets 24 and 24', which are driven integrally with sprockets 22 and 22', respectively. 25 and 25' are limit switches, respectively, for each adsorption device 17,
The block W of the suction device 17, 17' is controlled by cylinders 26, 26' which are integrally attached to the cylinders 19, 19' that raise and lower the suction device 17'. Attached to the tip of the moving side. Reference numeral 27 denotes a blower, which controls the suction or discharge of air into the pipe 28 with the action of a well-known four-way switching valve (not shown). The pipe 28 extends upwardly and horizontally along the intermediate portions of the beams 18, 18' to approximately the midpoint of the beams 18, 18'. Reference numerals 29 and 29' designate flexible tubes, one end of which is connected to the tip of the pipe 28, and the other end connected to each adsorption device 17, 17'.
be guided by Reference numerals 30 and 30' indicate limit switches, and the long pieces of wood, which are sucked and held by the suction devices 17 and 17',
When it comes into contact with the above-mentioned four-way switching valve (not shown), it releases the valve. Reference numerals 31 and 31' indicate level detection devices, which detect when the height of the block W placed on the lifting pieces 8 and 8' rises to a certain level with the action of a limit switch (not shown). Electric motor 1 that performs lifting control
6 is stopped to regulate the height of the block W, and at the same time the height is reduced upward. Reference numerals 32 and 32' are feeding positioning devices that regulate the positions of the long pieces of wood W ₁ , W _{2 .} . . , X ₁ , X ₂ . However, there is no problem in practice.

In the above configuration, first, a large number of pieces of wood are placed as one block on the tip of the beam 6, the lifting piece 8 is regulated to the minimum height, and then the chain 6 that drives the electric motor 7 is operated, and the block W is frame vs 1
Gradually transition in the direction. Next, the block W
When the electric motor 16 is driven when the electric motor 16 reaches above the lifting piece 8, the lifting piece 8 rises, and the block W engages with it, and the block W thereafter rises. In this process, when the upper end surface of the block W comes into contact with the level detection devices 31, 31', the height of the lifting piece 8 is regulated by the action of a limit switch (not shown) as the electric motor 16 stops operating.
In addition, the level detection devices 31, 31' are contracted upward, and the long wood of the block W located at the top is
Facilitates adsorption of W ₁ , W ₂ ……………, X ₁ , X ₂ ……………. Next, the suction devices 23 and 23' are driven independently, thereby moving the suction devices 17 and 17' to the left while being independently controlled. At this time, the cylinders 19, 1 attached to the adsorption devices 17, 17'
9', the limit switches 25, 25', and the respective lift control cylinders 26, 26' of the limit switches 25, 25' are also moved to the left.
In this leftward movement process, when the point X is reached, the cylinders 26 and 26' are switched to the corresponding limit switches 2 by the action of a limit switch (not shown).
5, 25' is lowered to a certain height. When each of these limit switches 25, 25' engages with the right end of the top row of block W, that is, the elongated wood _W1 on the extraction side, each limit switch 25, 25'
Each adsorption device 17, 17' corresponding to 25' is subjected to lowering control. Next, each suction device 17, 17' picks up the common long piece of wood _W1, rises, and is then controlled to move both suction devices 17, 17' to the right, but this control is performed using a known limit switch. This is achieved by a combination of It is assumed that when the suction devices 17, 17' move to the right, the limit switches 25, 25' are controlled to rise at point X in the drawing. In this way, the adsorption device 1
7, 17' is the long wood _W1 held by the second
When both of the limit switches 30 and 30' shown in the figure are engaged, the four-way switching valve (not shown) operates, and air is supplied from the blower 27 in the opposite direction to the adsorption devices 17 and 17', and the long wood W ₁ is released, the long wood W ₁ is placed on the rotating roller 2, positioned by the positioning devices 32, 32', and then transferred to a processing section (not shown). This completes one cycle. By repeating the same operation, long pieces of wood W ₂ and W ₃
are sequentially sent to the processing section. In this way, the supplied long wood W ₁ is released only when an arbitrary piece of long wood engages both the limit switches 32 and 32', and then the suction devices 17 and 17' start the next automatic feeding process. In preparation for this, they simultaneously start moving from the position shown in Figure 2. Therefore, even if each suction device 17, 17' has a slight deviation in relative position during each automatic supply of wood, this deviation is within the range of each automatic supply cycle and is not cumulative, and in actual It has been confirmed that the operation of the system does not cause any problems. After all the parts stacked on the top row of the block W have been transferred, the limit switch detects the state in which the suction devices 17, 17' move to the leftmost position, and the level detectors 31, 3
1' is lowered again, and at the same time, the electric motor 16 is driven to raise the lifting piece 8 to lift the long wooden block W.
The uppermost end surface of is regulated in the same manner as described above. Thereafter, in the same way, long pieces of wood W ₁ , W ₂ ……………, X ₁ , X ₂ …
. . . are automatically fed into the processing section one by one by the roller 2.

It should be noted that each limit switch in the above embodiments can be replaced with a detection element such as a phototube or a proximity switch.

In order to facilitate understanding of the operation of the above embodiment, the operation of the present invention will be explained in a skeleton manner with reference to FIG. In order to simplify the explanation, FIG. 3 describes the case where a block W is formed by stacking four long pieces of wood W ₁ , W ₂ , X ₁ , and X ₂ .

(A) In A, the block W is placed on the lifting piece 8,
Indicates rising status. In this state, the level detecting devices 31, 31' (only 31 is shown in FIG. 3, the same applies hereinafter) stand by at a predetermined lowest level height l when inactive.

(b) Next, as shown in b, the lifting piece 8 rises, and the top row of the block W becomes the detection device 31, 3.
1' and at the same time adsorption devices 17, 17'
(Only 17 is shown in FIG. 3, the same applies hereafter) A signal is emitted that moves in the direction of the arrow.

(c) Next, the level detection devices 31 and 31' are retracted upward to the height h, and then the suction devices 17 and
17' moves toward block W. At this time, the limit switches 25, 25' (only 25 is shown in FIG. 3, the same applies hereinafter) attached to the tip of the moving side detect the long wood _W1 on the take-out side of the top row of the block W.

(iv) Next, the suction devices 17 and 17' adsorb the long wood W ₁ at the right end of the top row, move back to the original position, release the long wood W ₁ , and place it on the roller conveyor 2.

(E) A state in which the long wood W ₁ at the right end of the top row is placed on the roller conveyor 2 is shown in E. The level detection devices 31, 31' are retracted to the height h in this state.

(F) Next, as shown in F, the detection devices 31 and 31' descend to level 1, and the leftmost long wood W ₂ in the top row collides with each other. Then, this collision signal is issued, and the suction devices 17, 17' start moving toward the block W again in response to this command.

(g) Next, as shown in g, the detection devices 31 and 31' are retracted to the height h, and the suction devices 17 and 17' move toward the block W, and the wood piece at the right end of the top row
W ₂ reaches the top surface.

(H) Next, the suction devices 17 and 17' adsorb the long wood W ₂ and return to the original position, release the long wood W ₂ and place it on the roller conveyor 2.

(Li) At the end of the process, the level detection device 3
1 and 31' are retracted to a height h like ri. In this state, the top row of blocks W are long pieces of wood X ₁ and X ₂ , and their upper ends are located lower than the height l when the level detection devices 31 and 31' are activated.

(J) Next, as shown in J, the level detection device 31,
31' is lowered from the height h of the retracted position to the height l of the operating position. The detection devices 31, 31' have a height l
Since the long pieces of wood W ₁ and w2, which are in the top row of the wood blocks W, do not come into contact with the detection devices 31 and 31' even if they are lowered to
A command is given to ascend towards 1,31'.

(l) Finally, the long pieces of wood X ₁ and X ₂ in the top row of the block W come into contact with the detection devices 31 and 31'.

(w) Then the detection devices 31, 31' are at the retracted position h
At the same time, the suction devices 17, 17' reach a position directly above the long piece of wood _X1 in the same manner as described above.

(W) The suction devices 17 and 17' adsorb the long wood X ₁ , return to the original position again, and place the long wood X ₁ on the roller conveyor 2.

Thereafter, in the same manner, the long _pieces of wood
After being attracted to 17', it is placed on the roller conveyor 2. The level detection device 31 then descends to the position A. Thus, one cycle of the present invention is completed.

As described above, the automatic wood supply device according to the present invention is particularly suitable for the block W in which long pieces of irregularly shaped wood are laminated.
When guiding each long piece of wood to the transport rollers, multiple points in the longitudinal direction of each piece of wood are detected using separate limit switches, and different suction devices are positioned at the detected points. In addition, the plurality of suction devices described above are used to transfer each long piece of wood to the conveyance path. Based on this configuration, even if long wood is not a regular shape, it can be reliably supplied based on complete automation, and conventional automatic supply is limited to regular long wood,
This is an excellent feature in light of the fact that irregularly shaped wood has been processed manually and inefficiently.

[Brief explanation of the drawing]

Figure 1 is a front view, Figure 2 is a plan view, Figure 3 is a ~
FIG. 5 is a skeleton explanation of the operation of the device of the present invention. W...Block, 8...Lifting piece, 10...
Chain, 11, 12... Sprocket, 16...
...Electric motor, 17,17'...Adsorption device, 25,2
5'... Limit switch, 31, 31'... Level detection device, 30, 30'... Limit switch, 32, 32'... Feed positioning device, 1
... Outer frame, 2 ... Conveyance roller, 3 ... Beam,
4, 5... Sprocket wheel, 6... Chain, 7... Electric motor, 8... Lifting piece, 9... Guide frame, 10... Chain (for lifting piece), 1
1, 12... Sprocket wheel (chain 1
0), 13, 14, 15, 16... (missing number), 1
7, 17'...Adsorption device, 18, 18'...Beam (movement of adsorption device 17, 17'), 19,1
9'...Cylinder (of adsorption device 17, 17'), 2
0, 20'... Chain (moves adsorption devices 17, 17'), 21, 21', 22, 22'... Sprocket of chain 20, 20', 23, 23'...
...Electric motor, 24, 24'... Sprocket, 2
5, 25'...Limit switch, 26, 26'...
... Lifting device (raises and lowers limit switches 25, 25'), 27... Blower, 28... Pipe,
29, 29'...Flexible tube, 30,
30'... Limit switch, 31, 31'... Level detection device, 32, 32'... Positioning device, W... Block, W ₁ , W ₂ ... Top row of long pieces of wood, x1, X ₂ ... ...Next row of long pieces of wood.

Claims (1)

[Scope of Claims] 1. A wood automatic machine that picks up long pieces of wood one by one from above from a block W in which long pieces of wood with the same thickness and uneven width are stacked and feeds them into a wood processing machine or the like. In the supply device, a conveyance chain 6 that conveys the block W, a lifting piece 8 that moves up and down orthogonally to the conveyance chain 6 and lifts the block W conveyed by the conveyance chain 6, and a conveyance chain 6 horizontal beams 18, 18' located above in parallel; attached to the horizontal beams 18, 18';
When not in operation, it is located at a predetermined lowest level for detecting the level of the block W, and when the block W is lifted and comes into contact with it, it stops the lifting piece 8 and can move up and down to move upward. When not in operation, the level detecting devices 31, 31' are moved out of the area where the level detecting devices 31, 31' move up and down along the horizontal beams 18, 18', and the level detecting devices 31, 31' When it comes into contact with the block W and moves upward, it moves toward the block W, and limit switches 25, 25' are attached to the tip of the moving side towards the block W.
5' detects a long piece of wood on the take-out side of the top row of blocks W, and then suctions and carries out the wood.