JPS62218353A - Device for feeding veneer to drying room - Google Patents

Abstract

PURPOSE:To make an operation smooth by providing a polyhedral rotary body in which a stopping part and an interposingly holding mechanism for a veneer are installed on each of its faces, right under the inlet side of a drying room, and thereby automatically holding interposingly while inclinedly erecting said veneer. CONSTITUTION:The angle of a polyhedral rotary body 21 is set so as to follow the inclined state of a feeding conveyor 32 in a normal condition, and the position of each stopper is adjusted in accordance with the length of a veneer 1 to be fed. Under such conditions, a veneer 1 which is delivered from a piled part 42 through an auto-feeder 41 is sent onto the placing face of the polyhedral rotary body 21 and stopped by the stopper 25. Then, as a piston rod 29 is contracted by the action of a fluid cylinder 28, a pressing bar 30 is lowered to interposingly hold the veneer 1, setting the veneer on the placing face, with its rear end part being projected outward. After holding the veneer, the polyhedral rotary body 21 is 90 deg. rotated by driving a motor, and each time the rotary body 21 is rotated, a veneer 1 is interposedly held on the next placing face in order.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention provides a drying method in which the
It relates to a device that feeds a veneer veneer cut in advance into a predetermined rectangular shape from a horizontal state to an inclined state, and in particular, at the starting end folding part of a pair of chain conveyors, while the adjacent horizontal bars are expanded IM by a cam and a cam floor. At the same time, the upper part of the veneer veneer, which was supplied in an inclined manner, is inserted.

``Prior art'' Conventionally, when drying veneer veneers, a plurality of upper and lower pairs of rolls are installed in the conveying direction, or an endless wire mesh band is hung in pairs upper and lower to dry the veneer veneer. A transport path was formed to sandwich and transport the board, hot air was circulated in the drying chamber, and the drying veneer veneer was indirectly heated and dried using an air medium.

On the other hand, there is currently a hot plate breathing method that employs a contact heating method with high thermal conductivity, or a large-diameter heated drum method that is used for pre-drying in existing equipment.

``Problems to be Solved by the Invention'' However, when the conveyance path is formed by rolls in the indirect heating method, the veneer veneer being pinched and conveyed tends to be compressed due to the pressure due to the weight of the rolls, and Due to the bending in the direction, the compression ratio tends to vary in the direction perpendicular to the conveying direction, so that the veneer veneer after drying is likely to have a reduced thickness and uneven thickness.

In addition, when the conveyance path is a wire mesh belt, the hot air supplied to the plywood veneer during conveyance is circulated in a direction perpendicular to the conveyance direction. This requires a duct to be interposed, which not only increases the size of the equipment, but also reduces the filling rate of the veneer veneers in the drying chamber, and increases the resistance of the air blown from the wind duct onto the veneer veneers. This resulted in an increase in the required power.

Next, when hot plates are used in contact heating drying, a veneer veneer is inserted between a pair of hot plates, and then the veneer is inserted to release the evaporated water vapor to the atmosphere or to prevent fiber cracking due to rapid drying. Therefore, there are difficulties in workability, such as having to repeatedly close and open the hot plate.
When a heating tram is adopted, a means for transferring the veneer veneer between the large-diameter heating drums is required. Equipment costs required for implementation, such as installing compressed air ports, will increase.

On the other hand, in recent years, combined with the deterioration of the raw wood situation, many veneer veneers cut from veneer lace have high moisture content, reaching the fiber saturation point in existing drying rooms. The amount of drying heat that accounts for the transpiration of free water, that is, the number of heating sections, tends to increase, which not only increases the cost of equipment but also causes problems such as increasing the installation area in plywood factories. do.

In view of the above, the present invention has been developed by installing a pair of Cheno conveyors facing each other on both sides in the longitudinal direction of a drying chamber formed by connecting a required number of heating sections. Seven holders are pivoted at regular intervals along the length of the chain connecting hair, and a cam floor that follows the cams is installed on top of the pair of holders so that the space between adjacent holders widens at the folded part. In addition, a horizontal bar is arranged between the lower parts of the veneer at right angles to the conveying direction, and a supply conveyor with a sloping supply surface of the veneer veneer is placed directly under the entrance side of the drying chamber to supply veneer to each side. A multi-plane rotating body, each equipped with a veneer stopper and a clamping mechanism, is installed, and the veneer veneers that have been transported in a nearly horizontal state are fed into the drying chamber while being erected at an angle, and suspended. It is transported and dried.

“Embodiment” An embodiment of the present invention will be described below with reference to the accompanying drawings.

The veneer veneer l to be dried has a rectangular shape cut into a predetermined width or a certain width, and is heated in the heating section 2.
A required number of drying chambers 3 are connected to each other and transported into and out of the drying chamber 3.

Inside the drying chamber 3, each unit heating section 2 is arranged so that hot air is forcedly circulated perpendicular to the conveyance direction of the veneer veneer l.
A lower ventilation passage 6 is formed by installing a blower 4 on the lower part and a heater 5 such as a steam pipe, an electric heater, or a burner on the other side, and dissipating the hot air generated in this lower ventilation passage 6. , is supplied by convection.

On the other hand, a pair of Cheno conveyors 7 are installed facing each other on both sides of the drying chamber 3 in the longitudinal direction perpendicular to the conveyance direction.
A holder 9 is pivotally fixed to each link 8 constituting the chain conveyor 7 with a pin 10.

A cam floor 11 is supported on the upper part of each of these holders 9, and a horizontal bar 12 is attached between the lower part of the cam floor 11 and the lower part of the holder 9 that is in the same phase as the chain conveyor 7 that is arranged opposite to each other. .

This horizontal bar 12 includes a U-shaped outer frame 13 having a length between at least the holding bodies 9 in the same phase, and an inverted U-shaped outer frame 13 that fits into the outer frame 13 using the -E lower surface of the outer frame 13 as a guide. The inner frames 14 are made to face each other, and a plurality of springs 15 that act outward are arranged at arbitrary intervals in the longitudinal direction between the outer frame 13 and the inner frame 14, and both ends of the springs 15 are covered with M16 to provide elasticity. This restricts reinstatement.

A plurality of gears 17 are rotatably supported on each of the outer frame 13 and the inner frame 14 at arbitrary intervals in the longitudinal direction. At this time, move W4! so that the gears 17 of the mutually adjacent holding bodies 9 reach a position where they can mesh with each other. ! ! It shall be.

Further, in the embodiment of the horizontal beam 12 shown in FIG. 4, the outer frame 13 is box-shaped, and the outer frame 13 and the inner frame! 4, and leaf springs ■8 at arbitrary intervals in the longitudinal direction.
When attaching and elastically supporting a plurality of gears 17 in two rows at arbitrary intervals in the longitudinal direction of the outer frame 13 and the inner frame 14, the outer frame 13 is provided with an elongated hole 19 for the movement of the inner frame 14.

A cam 20 for regulating the endless track of the holding body 9 is installed in the pair of chain conveyors 7, and this cam 20
, the adjacent holder 9 is expanded at each folded portion located at both ends, so that it opens to the maximum, especially when carrying in and holding the veneer veneer 1, or when opening and carrying out the veneer veneer 1. It is preferable to set

Immediately below the entrance side of the drying chamber 3, a multifaceted rotating body 21 having approximately the same length as the horizontal beam 12 is supported between a pair of support columns 22 via a shaft portion 23, and one shaft portion 23 side Driven by a driven motor 24, it is rotatably supported at an arbitrary angle 1i. In this embodiment, since the multifaceted rotating body 21 has four faces, the rotation is performed every 90 degrees.

This multifaceted rotating body 2! On each side, a stopper 25 whose position can be adjusted as appropriate is provided at the front part perpendicular to the longitudinal direction, and a rotary joint 26 of both shaft parts 23 is provided at the rear part on both sides orthogonal to the conveying direction. a fluid cylinder 28 connected to
are installed respectively, and a clamping mechanism in which a pressing bar 30 is horizontally suspended between the tips of the piston rods 29 is attached, and the rear part of the veneer veneer l is clamped.

Between this multifaceted rotating body 21 and the starting end folded portion of the chino conveyor 7, the supply surface is inclined, and the sticking portion 3! An endless supply conveyor 32 consisting of a chino, a belt, etc. in which a It is capable of reciprocating by a predetermined distance, and a driving bar 35 is swingably provided at its lower end, and a detachable body 37 is provided at its upper end, which moves forward and backward by the rotation of an eccentric ring 36. .

On the other hand, on the exit side of the drying chamber 3, a guide conveyor 38 is disposed diagonally in the vicinity of the folded end portion of the chino conveyor 7, and an adjustment conveyor 39 for reducing the falling speed of the veneer veneer l is disposed below the guide conveyor 38. , and is connected to a take-out mechanism 40 having substantially the same configuration as the multifaceted rotating body 21 described above.

In the figure, 41 is an auto feeder that feeds the veneer veneer l one by one from the stack aH 42, and 43 is an unloader that takes out the dried veneer veneer 1 from the take-out mechanism 40 and takes it out to the conveyor 44. The conveyor 44 is arranged via a cooling device 45 to the loading section /16.

Next, the effect will be explained.

First, with the multifaceted rotating body 21 in a normal state, the supply conveyor 3
Set the angle to follow the inclination state of 2, and
Depending on the length of the veneer veneer to be supplied, each stopper 25
Adjust the position.

Under this condition, the veneer veneer l fed out from the stacking section 42 by the auto feeder 41 is sent onto the mounting surface of the multifaceted rotating body 21 and stopped at the stopper 25.

Next, when the piston rod 29 is contracted by the operation of the fluid cylinder 28, the pressure bar 30 is lowered and the veneer is removed. (2) Hold the plate 1 on the mounting surface with the rear end protruding outward. After the clamping, the motor 24 is driven to rotate the multifaceted rotating body 21 clockwise every 90 degrees using the shaft 23 as a fulcrum, thereby sequentially clamping the veneer veneer l onto the next mounting surface.

When the plywood veneer l reaches just below the entrance side of the drying chamber 3 and the protruding portion of the plywood veneer l is inserted into the lower part of the supply conveyor 32 and the driving bars 351r and J, the driving bar 35 is swung. Press the protruding part against the supply conveyor 32 surface,
In addition, in synchronization with this, the fluid cylinder 28 is reversely operated to release the press bar 30 from the l side of the veneer veneer.

Next, each piston lorado 3 of the double fluid cylinder 33
4 are simultaneously reduced and the supply conveyor 32 is rotated a certain distance clockwise, the pricking part 31 moves from the standby position shown by the two-dot chain line to the plywood veneer l on its way past the driving bar 35. It sticks and moves to the supply position shown by the solid line. At this time, the upper part of the veneer veneer I is in a state facing the starting end folding portion of the pair of chain conveyors 7.

Below the starting end folding part, as the pair of chain conveyors 7 rotate, a cam floor 1 is formed that follows the shape of the cam 20.
1, the adjacent holding body 9rWl is expanded, so the upper part of the veneer veneer l can be easily inserted into the horizontal beam 12 which is expanded to the maximum extent.

Next, when the cam floor 11 rises from the lowest point of the cam 20 and restricts the movement of the holder 9 to a substantially upright state, the upper part of the veneer veneer l is moved up against the outer frame 13 that constitutes the horizontal bar 12 adjacent to the front. The gear 17 of the inner frame 14 and the gear 17 of the inner frame 14 forming the horizontal crosspiece 12 in the upright state are interlocked and held at a plurality of locations along the longitudinal direction thereof.

At this time, the opposing gears 17 protrude outward from the horizontal beams 12 and are resiliently supported, causing the gears 17 to
ζ2 The veneer veneers 1 can be properly clamped without a slight delay, and the veneer veneers 1 are hung in close contact with each other at intervals of the horizontal bars 12, and low-speed conveyance is started. At the start of this conveyance, the eccentric ring 36 is rotated and the hexagonal ring 1-10 is rotated. The back of the plate 1 is pushed by the detachment body 37 to release the 6° engagement with the pierced portion 31.

During the conveyance, indirect heating drying is performed by hot air circulating within the heating section 2 orthogonally to the conveyance direction. In particular, in the early stage of drying, evaporation of free water becomes active, and the shrinkage rate of fibers inevitably increases with drying. Since the veneer veneer 1 is suspended while being held in mesh by the veneer, the stress associated with shrinkage in the direction perpendicular to the fibers of the veneer veneer 1 can be absorbed by the rotation of the gear 17. The fibers move in the longitudinal direction of the fibers 12 while forming fine cracks due to their shrinkage weight and the gear 17, thereby preventing the fibers from cracking or cracking.

After drying, when the veneer veneer l reaches the end folding part of the chain conveyor 7, the adjacent holder 9
The leap is expanded to the maximum extent, and at this time of expansion, the interlocking grip with the gear +7 is released, the veneer veneer 1 is guided to the guide conveyor 38, and its falling speed is reduced by the adjustment conveyor 39. However, it is pressed in the take-out mechanism 40 through almost the same procedure as the multifaceted rotating body 21,
It is rotated each time.

Next, when the unloading surface of the take-out conveyor 44 and the surface of the veneer veneer become the same, the operation of the unloader 43 causes
The veneer veneer l is taken out from the take-out mechanism 40 and conveyed to the loading section 46 via the cooling device 45.

In this embodiment, a pressing bar 30 is attached to the multifaceted rotating body 21.
, a stabbing part 31 on the supply conveyor 32, a driving bar 35,
Separation bodies 37 are respectively installed to clamp, clamp and release the veneer veneer l, or stick and release the plywood l, but instead of this, a vacuum generator (Fig. (not shown) may be connected separately to hold the veneer veneer 1 by suction and release it by suction.

``Effects'' As described above, according to the present invention, a multi-sided rotary body, each of which has a stopping upper part of a plywood veneer and a clamping mechanism installed on each side, is placed directly under the entrance side of a drying room where a required number of heating sections are connected. between the starting end folded part of the chain conveyor and the multifaceted rotating body, which are arranged opposite to each other in this drying chamber,
A supply conveyor with a sloping supply surface for plywood veneer is installed, and a cam is installed on the top of a plurality of holding bodies pivotally fixed to the chain conveyor so that adjacent holding bodies widen at the folded part. Since the cam floor is also arranged with a horizontal crossbeam at right angles to the conveying direction at its lower part, the veneer veneer l conveyed in a nearly horizontal state can be made to stand up in an inclined manner, and the starting end turn-up part in the drying chamber can be moved. The upper part can be automatically clamped by the adjacent horizontal rail,
This allows for smoother work.

In addition, according to this suspension conveyance method, compared to the conventional technology described above, the filling efficiency in the drying chamber is improved, and the fibers are prevented from breaking due to internal stress during drying. It has various effects such as reducing subsequent thickness and thickness unevenness.

In addition, this type of veneer veneer can be used not only for standard length veneers, but also for rectangular veneers, even if the width is less than the standard size, it can be held between teeth, transported under suspension, and dried. This is possible, and the stress during drying can be reduced due to the fine cracks formed in the fibers of the veneer veneer due to the rotation of the gear 17.

[Brief explanation of drawings]

FIG. 1 is a side view showing one embodiment of the present invention, and FIG. 2 is a side view showing one embodiment of the present invention.
3 is an enlarged explanatory view of the main part with a partial cutout of the folded part; FIG. 4 is an enlarged explanatory view of the main part with a partial cutout showing another embodiment of FIG. 3. Figure 5 is a partially cutaway enlarged side view showing the supply state, Figure 6 is B-B of Figure 1.
It is a partially cutaway enlarged view taken along the line. 1...Plywood veneer, 2...Heating section, 3...
・Drying room, 7... Chain conveyor, 9... Holding body, 11... Cam floor, 12... Horizontal bar,
20 fist prayer/cam, 2I... polygonal rotating body, 32...
・Supply conveyor patent applicant Taihei Seisakusho Co., Ltd.'AI Mu

Claims (1)

[Claims] A multi-sided rotary body, each of which has a plywood veneer stop and a clamping mechanism installed on each side, is placed directly below the entrance side of a drying chamber in which the required number of heating sections are connected. A supply conveyor having an inclined supply surface of veneer veneer is installed between the starting end folding part of the chain conveyor and the multifaceted rotary body, and the upper part of a plurality of holding bodies pivotally fixed to the chain conveyor is installed. In addition, a cam floor that imitates a cam in which the space between adjacent holding bodies expands at the folded part is installed.
Further, a veneer supply device into a drying chamber is characterized in that a horizontal bar is arranged between the lower portions of the horizontal bars so as to be perpendicular to the conveying direction.