JP2001348151A - Suspension type suction carrier conveyor for this goods - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspension type suction carrier conveyer capable of carrying thin goods, might be wrinkled by air resistance or the like, while being kept as it is. SOLUTION: A cylinder device from which a rectangular conveyor mounting frame D24 is suspended is mounted on a conveyor suspension frame of the suspension type suction carrier conveyor D. Four hollow rails kept apart in parallel along a carrier passage extend between a pair of right and left side frames D30, D32. Each hollow rail has an opening extending in the longitudinal direction of the carrier passage. Belts D56, D58 are driven to pass along the lower faces of the respective hollow rails. Each of two belts D56 located sideways has a plurality of suction hole groups in specified ranges at mutually equal intervals. Each of two belts D58 located inside has a plurality of suction hole groups in specified ranges at mutually equal intervals. The suction hole groups formed in the respective belts D56, D58 correspond to ranges adaptable for the attitude of the thin goods.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor for transporting a sheet-like article which becomes wrinkled due to air resistance. More specifically, the present invention relates to a suspension-type suction-conveying conveyor for sucking a thin plate-shaped article without changing its posture and transporting it in a suspended state.

[0002]

2. Description of the Related Art If a product is rigid and does not deform,
It is sufficient to convey on a belt using a belt conveyor. However, when a thin plate-shaped article that wrinkles due to air resistance is conveyed on a belt, it rolls up due to air resistance,
It slips off the belt due to air resistance. For example, when used as wallpaper or flooring, or a sheet-like article punched out of a tray, that is, when a single plate having a thickness of about 0.2 to 0.4 mm sliced from a laminated wood is transported on a belt, The transport itself cannot be performed sufficiently. Further, a thin plate-like article such as a veneer is weak and soft. When the veneer is unloaded from the belt, the sides and corners are easily bent. for that reason,
It is difficult to stack them neatly in a stack. When there are post-processes, it is also difficult to put a thin plate-like article into each process in those processes.

[0003]

As one means for solving the problem, there is a method of transporting a thin plate-like article using a suction pad. That is, this is a method in which a thin plate-like article is sucked by a suction pad and the thin plate-like article is transported in a suspended state. With this means, the sheet-like article does not deviate from the transport path due to the resistance of air. However, when a thin plate-shaped article is sucked by a suction pad and transported in a suspended state, the sucked portion is OK, but the other portions hang down. Therefore, when the sheet-like articles are unloaded, the sides and corners are bent, and the sheet-like articles cannot be stacked neatly in a stacked manner.

[0004] In order to convey a sheet-like article in a horizontal state and unload it horizontally, a certain solution can be achieved by providing a plurality of suction pads and adsorbing the entire surface of the sheet-like article. However, providing a plurality of suction pads is extremely uneconomical. In addition, if the transport span is long, it is necessary to move a plurality of suction pads, and the entire apparatus becomes large, which is not a practical solution. In particular, as the thickness of the thin plate-shaped article increases, the number of suction pads also increases. further,
The movement amount of the suction pad becomes longer. The travel distance affects not only the outward trip but also the return trip. For this reason, it takes a long time to carry, and the work efficiency is reduced.

SUMMARY OF THE INVENTION An object of the present invention is to provide a suspension-type suction-conveying conveyor which can convey a thin plate-shaped article which is wrinkled due to the resistance of air in its posture. Another object of the present invention is to provide a suspension-type suction-transport conveyor capable of sucking a thin plate-like article with a small power in the above-mentioned suspension-type suction-transport conveyor.

[0006]

SUMMARY OF THE INVENTION The present invention comprises a plurality of hollow rails having an opening extending in a longitudinal direction of a transport path, an exhaust device for depressurizing the hollow rail, and an opening extending along the opening of the hollow rail. And two or more belts wound and driven to cover the belt, the belt being provided with suction holes that penetrate in alignment with the opening, and the suction holes are partially wound in the belt winding direction. The above-mentioned problem has been solved by a hanging-type suction-conveying conveyor for a thin plate-shaped article formed as described above.

The inside of each hollow rail is in a reduced pressure state by the operation of the exhaust device. The opening covered by the belt is hardly able to suck air. Air is exclusively sucked through the suction holes of the belt. The thin plate-shaped article is adsorbed on the belt with the air sucked from the suction holes.
The opening is formed in the longitudinal direction of the transport path, and the thin plate-shaped article moves along the transport path by driving the belt. In this way, the belt for sucking the sheet-like article is wound and driven, so that the returning operation for returning the suction pad is not required, and the sheet-like article can be continuously conveyed.

[0008] The suction holes are partially formed in each belt, and the thin plate-shaped article is sucked in a range where the suction holes are formed. The belt is exchanged according to the size of the sheet-like article. For example, to convey a large thin plate-like article, a large belt is used in a range where suction holes are formed, and to convey a small thin plate-like product, a small belt is used in a range where suction holes are formed. . By exchanging the belts, it is possible to suspend and convey different sizes of sheet-like articles.

By limiting the area in which the suction holes are formed, the opening of the hollow rail is closed by another part of the belt. Air is sucked only through the suction holes. Therefore, the force of sucking the thin plate-shaped article by the suction hole is increased, and the thin plate-shaped article can be reliably suspended and transported. In other words, since the air is sucked only in a specific range, the same force for sucking the thin plate-shaped article can be obtained by a small and small capacity exhaust device.

[0010] In each belt, the range in which the suction holes are formed may be the same between the belts, but it is preferable that the belts have different phases. The thin plate-shaped articles are not always rectangular, and even if they are rectangular, they do not always move in a line along the transport path. For example, when a rectangular thin plate-like article is skewed, it is preferable to use a belt having a suction hole formed in a specific range in accordance with the posture of the thin plate-like article put into the hanging-type suction conveyance conveyor. When the number of belts becomes three or more, the area where the suction holes are formed is shortened in the side belt, and the area where the suction holes are formed is lengthened in the inner belt, so that the shape and posture of the thin plate-shaped article are improved. It is preferable to match with.

Further, since the attitude of the thin plate-shaped article is not always constant, it is preferable that the belt is driven independently. After detecting the attitude of the sheet-like article with an image sensor, etc., when the belt is driven so that the area where the suction hole is formed matches the sheet-like article, air is sucked from the suction hole which remains open. Is less likely to be done. For example, by making the belt on the right side of the conveyance path ahead or the belt on the left side ahead, the area where the suction holes are formed in each belt can be made to match the shape of the thin plate-shaped article.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a layout diagram of a system for manufacturing a tray by laminating and adhering laminar articles and punching the laminated laminar articles. The tray is manufactured by stacking three veneers and punching them into a predetermined shape. First, a veneer is processed from wood by the slicer S. The veneer of the handled article is a thin plate-like article. Specifically, the veneer has a thickness of 0.2 to 0.4 mm and a size of 1,1.
It is 00 mm x 1,100 mm. As described above, since the veneer is a thin and large article, a device is required for handling. The veneers coming out of the slicer S are stacked on a stacking table E via a discharge conveyor B and a suspension type suction conveyance conveyor D. Next, the veneer group is transported by a forklift, a platter, or the like, and sent to a drying step. In FIG. 1, F is a drying furnace. The stacked veneers are conveyed in the drying furnace F one by one. The veneers that have passed through the drying furnace F are stacked on the downstream side. Next, the veneer group is transported by a forklift, a platter, or the like, and sent to a gluing step. In FIG. 1, G is a gluing device. Three
The laminated single sheets are sent to the punching process in that state. In FIG. 1, H is a press device.
A plurality of 16, 24 or 25 circular or square trays are punched from one glued veneer. In FIG. 1, J is a product residual material separation device. The product residual material separation device J separates the product tray and the residual material and sends them to the next step. In FIG. 1, two rows of tray manufacturing systems are shown in parallel, but may be a single row or three or more rows.

The slicer S is an apparatus for shaving wood having a predetermined cross section thinly and processing a veneer having a thickness of 0.2 to 0.4 mm. Wood is 1,100mm long x 1,100m wide
m, whereby veneers of a predetermined size are discharged one after another. The veneer processed into a thin plate shape is transported to the discharge conveyor B by the belt conveyor S10 at the slicer S outlet. The slicer S discharges the veneer at a speed of approximately 60 m / sec.

Downstream of the slicer S, a stacking device A is provided. The stacking device A is a device for stacking veneers of the above size discharged from the slicer S at high speed. As shown in FIG. 2, the stacking device A includes a discharge conveyor B, a suspension-type suction / conveyance conveyor D, and a stacking table E. The discharge conveyor B is a conveyor for receiving a veneer from the belt conveyor S10 of the slicer S on a horizontal placing / transporting surface, and then transferring the veneer to the suction / transport conveyor D. The suction conveyance conveyor D is a conveyor that suctions a single plate on the horizontal loading conveyance surface of the discharge conveyor B and conveys the veneer to the stacking table E in a suspended conveyance state. The stacking table E is a device that stacks veneers in a stacked state by letting down the veneers to be suspended and transported by the suction transport conveyor D.

The suspension-type suction conveyance conveyor D is shown in detail in FIGS. Suspended suction conveyance conveyor D
Is a conveyor for transporting the veneer from the discharge conveyor B to the stacking table E in a horizontal posture. Since the article handled in the present invention is a single sheet of a thin sheet-shaped article, the article is very soft and easily affected by air resistance, and the edge of the edge is easily bent. For this reason, the suspension-type suction conveyance conveyor D has a structure in which it is horizontally conveyed and then released horizontally. This improves the stacking accuracy and facilitates the handling of the veneer in the next step. Suspended suction conveyance conveyor D
Overlap vertically on the downstream side of the discharge conveyor B. This is for sucking the veneer from the loading / conveying surface of the belt B10 of the discharge conveyor B. The suspension type suction conveyance conveyor D extends from the downstream end of the discharge conveyor B to a position above the stacking table E along the conveyance path.

The suspension type suction conveyance conveyor D includes a pair of upstream leg frames D12 and D16 extending upward from the downstream leg frame of the discharge conveyor B, and a pair of downstream leg frames D10 and D14 on the opposite side, respectively. Has a conveyor suspension frame D18 supported by the leg frame of the present invention. Cylinder devices D20 and D22 are attached to the upstream and downstream sides of the conveyor hanging frame D18. The cylinder devices D20 and D22 suspend a rectangular conveyor mounting frame D24. Cylinder device D20, D2
2 operates, the conveyor mounting frame D24
Moves up and down. On the conveyor hanging frame D18, a photoelectric switch LD for detecting the arrival and retreat of a single plate is mounted in a pair with the photoelectric switch LB of the discharge conveyor B.

As shown in detail in FIG. 3, the conveyor mounting frame D24 includes a pair of left and right side frames D3.
0, D32, and a plurality of transverse frames D34 that cross between these side frames. The conveyor mounting frame D24 includes a pair of left and right side frames D30 and D32.
, Four hollow rails D26 extending in parallel along the transport path extend. Each hollow rail D26
Are supported by the traversing frame D34. A hollow chamber is attached to the pair of left and right side frames. The hollow chamber enters between the hollow rails D26,
Each hollow rail D2 from the side of the hollow rail D26
It communicates with 6. The blower that is the exhaust device is a duct D
It communicates with the hollow chamber D36 through 38. When the exhaust device is started, the duct D38 and the hollow chamber D3 are activated.
The pressure in the hollow rail D26 is reduced via 6. Since the conveyor mounting frame D24 moves up and down by the cylinder device, the duct D38 is formed of a flexible tube.

As shown in FIG. 4, each hollow rail D26 has a rectangular cross section. In the hollow rail D26,
An opening D40 extending in the longitudinal direction of the transport path is formed. Both sides of the opening D40 are flat and smooth sliding surfaces. The hollow rail D26 is closed at its end, and when depressurized by the blower, air is sucked only through the opening D40.

Returning to FIG. 3, the conveyor mounting frame D24
A drive shaft D42 is rotatably supported downstream of the side frame. A plurality of drive pulleys D44 are attached to the drive shaft D42 at positions corresponding to the hollow rails D26. A take-up D48 is mounted at a position corresponding to the hollow rail D26 on the upstream side of the side frame of the conveyor mounting frame D24, and a driven pulley D52 is mounted on each take-up D48. Corresponding drive pulley D44 and driven pulley D
Belts D56 and D58 are wound around 52. A servo motor D60 and a speed reducer D62 are mounted on the downstream side of the side frame of the conveyor mounting frame D24, and stop and start of the drive shaft D42 and speed adjustment are performed by control means (not shown).

As shown in FIGS. 4 and 5, the belt D
56 and D58 are wound and driven along the lower surface of each hollow rail D26. The belts D56 and D58 have substantially the same width as the hollow rail D26. As shown in FIG. 6, the belts D56 and D58 are toothed belts, and have teeth formed at the center. The width of the teeth is smaller than the opening D40 of the hollow rail D26. The belts D56 and D58 have suction holes D64 in specific areas on both sides of the teeth. Suction hole D6
4 is formed at a position communicating with the opening D40. For example, the two belts D56 on the side have a plurality of suction hole groups in a specific range equally spaced from each other. The two inner belts D58 have a plurality of suction hole groups in a specific range equally spaced from each other. The suction hole group of the side belt D56 is formed in a shorter range than the suction hole group of the inner belt D58. Each suction hole D64 is formed so as to face the opening D40 of the hollow rail D26. In the present embodiment, the suction hole D64 is circular, but it is not necessary to be limited to this.
The belts D56 and D58 have no suction holes outside the specific range. The group of suction holes formed in each of the belts D56 and D58 corresponds to a range that can correspond to the posture of the thin plate-shaped article. By changing the position and number of the suction holes, the phase in the circumferential direction of the belts D56 and D58, or by changing the belt, the suction holes are arranged in a considerable range on the thin-shaped articles of various shapes. Can be. The belts D56 and D58 are formed along the lower surface of each of the depressurized hollow rails D26.
Is moved, the air is sucked through the suction holes D64, and the veneer is suctioned to the suspended conveyance surfaces of the belts D56 and D58 by this action. Since the belts D56 and D58 move along the lower surface of the fixed hollow rail D26, the belts D56 and D58 are preferably made of a material that easily slides on the lower surface of the hollow rail D26.

In the above embodiment, four belts are driven by one drive shaft, but a drive device can be provided for each belt. By controlling each driving device, each belt is driven independently.
In this way, the suction holes of one belt can be relatively shifted from the suction holes of another belt. The veneer discharged from the slicer S is not always in a fixed posture. By detecting the posture of the veneer with an image sensor or the like, the position of the suction hole group can be adjusted to a position most suitable for conveyance. The use of the toothed belt is to prevent slippage with the drive pulley D44 and to appropriately control the phase between the belts. This control can be dealt with by attaching an encoder to the motor D60 or counting the teeth of the belt or the pulley.

Next, the operation will be described. The height of the conveyor mounting frame D24 is adjusted by the cylinder device. In the present invention, since the thin single plate on the discharge conveyor B is sucked, it is important to set the interval between the loading and conveying surface of the belt B10 of the discharge conveyor B and the hanging and conveying surfaces of the belts D56 and D58 of the suction conveyor D. It is. Suction transport conveyor D
Is in a standby state stopped by the control means. The blower is also constantly operated, and the inside of the hollow rail D26 is depressurized. When the veneer on the loading / transporting surface of the discharge conveyor B activates the photoelectric switches LB, LD, the discharge conveyor B is decelerated, and the belts D56, D58 of the suspension type suction transfer conveyor D are activated. The belts D56 and D58 are activated simultaneously or independently in accordance with the posture of the veneer, and thereafter, the discharge conveyor B and the suspension-type suction conveyance conveyor D run in parallel at a constant speed. Each belt D56,
When the suction hole D64 of D58 approaches the starting point of the opening D40, air is sucked from the suction hole, and the single plate on the discharge conveyor B running in parallel starts to be sucked. First, the inner belt D58
Adsorb the veneer. Next, the side belt D56 sucks the veneer. All the suction holes are located within the outline of the veneer and suck the veneer.

When the veneer moves between the discharge conveyor B and the suction / conveyance conveyor D, and the photoelectric switches LB and LD detect the retreat of the veneer, the transfer of the veneer from the discharge conveyor B to the hanging suction / conveyance conveyor D is performed. Will be completed. The discharge conveyor B accelerates and returns to the original conveying speed. The suspension type suction conveyance conveyor D conveys the veneer to a position above the stacking table E in a suspended state. The control method differs depending on how much the predetermined range in which the suction hole group is formed is provided at predetermined intervals in the circumferential direction of the belt. In order to increase the number of conveyed veneers, it is preferable to provide a plurality of suction holes in the circumferential direction of the belt. In this case, the driving of the belt is intermittent. When the succeeding suction hole group reaches just before the starting point of the opening D40, the belt stops. Photoelectric switch LB, L
When D detects the arrival of the veneer on the discharge conveyor B, the suspension type suction conveyance conveyor D restarts. Belt D56, D
In order to detect the position of the group of suction holes 58, an encoder may be provided in the motor, the teeth of the belt may be counted, and a sensor or the like may be provided at a position corresponding to the group of suction holes. By this repetition, the suspension-type suction and transport conveyor D suspends and transports the veneer in large quantities based on the veneer discharge capacity of the slicer S. In addition, since the transport speed is low, the posture of the veneer that is easily affected by air resistance is unlikely to collapse, and there is an effect that the posture can be kept constant when the veneer is released to the stacking table E.

When the veneer arrives above the stacking table E, the single sheet is released from being sucked by the hanging suction conveyor D. For example, the veneer is separated from the belt by a stacking arm that swings around the downstream end of the suspension-type suction / conveyor D. When a predetermined amount of veneer group is released onto the pallet, the stacking device A is temporarily stopped, and the pallet is replaced. As described with reference to FIG. 1, the veneer group is transported for each pallet by a forklift or the like in a subsequent drying step.

[0025]

According to the present invention, as described above, the pressure of the hollow rail provided with the opening extending in the longitudinal direction of the transport path is reduced, and the suction belt formed on the single belt wound and wound so as to cover the opening is provided. Since the thin sheet-like article is sucked and conveyed by the holes, the thin sheet-like article can be continuously conveyed only by running the belt in one direction. In addition, the thin plate-shaped article can be transported without deviating from the transport path due to the resistance of air. In addition, since suction holes are formed only in a predetermined range of the belt in consideration of the size of the sheet-shaped article, air is not sucked into the hollow rail except in a specific range where the sheet-shaped article is sucked. In addition, the thin plate-like article can be strongly sucked to the belt in a range where the suction hole is formed.
Therefore, in addition to being able to reduce the size of the exhaust device and being economical, there is also an effect of reducing the amount of air flowing out of the exhaust device when the hollow rail is depressurized, thereby reducing noise.

Furthermore, since the areas where the suction holes are formed in the respective belts are different, the sheet-like article can be sucked only in the above-mentioned range according to the shape and posture of the sheet-like article. Since air is not sucked, the effect of increasing the suction force, the effect of reducing the size of the exhaust device, and the effect of reducing noise are remarkable.

According to the second aspect of the present invention, since the respective belts are driven independently, the range in which the suction holes are formed is phase-controlled between the belts to convey thin-shaped articles having various shapes and postures. can do.

[Brief description of the drawings]

FIG. 1 is a layout diagram of a tray manufacturing system.

FIG. 2 is a side view of a stacking device provided with a suspension type suction conveyance conveyor.

FIG. 3 is a plan view of a suspension type suction conveyance conveyor.

FIG. 4 is a perspective view showing a relationship between a hollow rail and a belt.

FIG. 5 is a front view of a conveyor mounting frame.

FIG. 6 is a sectional view of a belt.

[Explanation of symbols]

 Reference Signs List A Stacking device B Discharge conveyor B10 Belt D Suction conveyance conveyor D10, D12, D14, D16 Leg frame D18 Conveyor hanging frame D20, D22 Cylinder device D24 Conveyor mounting frame D26 Hollow rail D30, D32 Side frame D34 Horizontal frame D36 Hollow chamber D Duct D40 Opening D42 Drive shaft D44 Drive pulley D48 Take-up D52 Driven pulley D56, D58 Belt D60 Servo motor D62 Reduction gear D64 Suction hole E Stacking table F Drying furnace G Gluing device H Press device J Product residual material separation device LB photoelectric switch ( Discharge conveyor side) LD Photoelectric switch (Suction conveyor side) S Slicer S10 Belt conveyor

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Manabu Osawa, 4-17-17 Tsurumi, Tsurumi-ku, Osaka, Osaka Prefecture Inside Tsubakimoto Chain Co., Ltd. (72) Tadao Mizumura 4--17, Tsurumi, Tsurumi-ku, Osaka, Osaka No. 96 F-term (reference) in Tsubakimoto Chain Co., Ltd. 3F049 FB04 LB01 LB07

Claims (2)

[Claims] 1. A plurality of hollow rails having an opening extending in a longitudinal direction of a transport path, an exhaust device for reducing the pressure of the hollow rail, and a winding drive along the opening of the hollow rail to cover the opening. A belt having at least two belts, wherein the belt is provided with suction holes that penetrate in alignment with the opening, and the suction holes are partially formed in a winding direction of the belt. A belt in which the suction holes are formed are different in phase between the belts. 2. The suspension conveyor according to claim 1, wherein said belt is driven independently.