JPH0374163B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for producing plywood, decorative boards,
Alternatively, the present invention relates to a horizontal multi-stage press that heats and presses a plate to be processed, such as a veneer veneer, by moving toward and away from the center at equal distances, and then heats and presses or releases the press.

Normally, the multistage press that is mainly used in the plywood manufacturing process has a movable platen that can be raised and lowered by a ram cylinder installed in the lower frame, and is equipped with multiple stages of hot plates between the upper and lower frames. After inserting and placing the plate to be processed between the hot plates, the movable platen is raised, and the hot plate above it is successively pushed up, starting with the lowest hot plate, the press is closed, and the press is heated and pressurized for the required time. A processed plate was obtained.

Therefore, in the conventional vertical multistage press,
Due to the arrangement of multiple hot plates above and below, the closing and opening movements that make up the press cycle must depend on the lifting and lowering of the movable platen located below.
It was not possible to shorten the press cycle, that is, shorten the press opening and closing time.

In addition, in this type of multi-stage press having a plurality of upper and lower heating plates, in order to support each stage of the heating plates, support claws are attached to the four corners of the heat plates, and the support claws are attached to the supports in the form of a ladder step. A method is adopted in which the components are placed one after another on a support. Therefore, when determining the thickness of the hot plate at each stage, in addition to the strength required for heating and pressing the plate to be processed, which is the main purpose, also consider the strength that corresponds to the deflection and bending caused by the distance between the supporting points. Taking this into consideration, it is thicker than necessary in order to provide rigidity. Furthermore, arranging hot plates in multiple stages, which are thicker than necessary and heavier than necessary,
With respect to the plate to be processed placed on the hot plate, variations in the pressing force at the upper and lower parts of the plate increase, which not only causes poor adhesion and thinning of the processed plate, but also causes damage to each layer. The diameter of the ram cylinder, which is the means for raising and lowering the hot plate of the press, as well as the capacity of the pump that supplies fluid to the cylinder, increased the load on the fluid unit, forcing the multistage press to become larger.

In view of the above, the present invention arranges a plurality of heat plates in parallel between frames arranged on the left and right sides via a pair of movable plates, and pivots rotary wheels on both sides of the upper part of both frames. Linking members are hung endlessly between rotating wheels that face each other on the left and right, and each linking member is fixed to locking devices placed on both sides of the upper portions of the left and right movable plates, as described below. Examples of the invention
The configuration will be explained based on the attached drawings.

Through a pair of upper and lower cross beams 1 and 2 arranged at arbitrary intervals in the vertical direction and the front-back direction,
Frames 3 and 4 are provided oppositely on the left and right sides, and a ruler 6 is attached to one of the rails 5 laid on the upper cross beam 1. Between the rails 5 are a plurality of heat plates 9 attached protruding from both sides of the upper part via a moving member 8 having an engaging part 7 on either side of which engages with a ruler 6, and these heat plates 9. A pair of movable plates 10 and 11 are suspended on the left and right sides of the plate 9.

A plurality of fluid cylinders 12, 13 are installed in the left and right frames 3, 4, respectively, and each ram 14,
The tips of 15 are attached to the backs of the left and right movable plates 10 and 11. At this time, if it is desired to heat and press a plurality of types of plates 16 having different dimensions using one press, each set of fluid cylinders 12, 13 and rams 14, 15 should also be It is assumed that the right frames 3 and 4 and the left and right movable plates 10 and 11 are arranged so as to be movable within the vertical planes thereof.

For example, as the details are shown in FIG. 5, a pair of left and right sliding guides 17 are attached to the left and right frames 3 and 4 facing each other at a constant interval in the vertical direction. , Also, this left and right sliding guide 1
Fluid cylinders 12 and 13 are fitted into a sliding plate 18 fitted between the cylinders 7 and 7 at approximately equal intervals. On the other hand, a pair of left and right sliding guides 19 are attached to the backs of the left and right movable plates 10 and 11 facing each other in the vertical direction, and the rams 14 and 15 are fitted and held through sliding plates 20. are doing.

Next, the sliding plates 18 on the left and right frames 3 and 4 sides
After drilling holes near both ends of the hole, a female thread is formed in the hole, and the upper and lower portions of the hole are formed into the guide plate 21.
A stepping screw 22 held by the sliding plate 18 is screwed in, and by rotating the stepping screw 22 in the forward and reverse directions, the sliding plate 18 can be moved upwardly and downwardly.

In addition, the sliding plate 1 is placed along the left and right sliding guide 17.
In order to move 8 up and down, it is also possible to use rack and pinion movement or fluid movement as shown in FIG. That is, a pair of vertically moving fluid cylinders 23 are pivotally fixed near both ends of the sliding plate 18, and the tips of each piston rod 24 are
The left and right frames 3 and 4 are pivoted.

Further, FIG. 7 shows a case in which in addition to vertical movement within a vertical plane, horizontal movement is also performed. That is, the inside of the sliding plate 18 is cut out in a rectangular shape,
Vertical sliding guides 25 having a fixed length in the horizontal direction are formed at the upper and lower parts of the vertical sliding guides 25, and the fluid cylinders 12 and 13 are fitted between the vertical sliding guides 25 via appropriate fittings. A pair of movable pieces 27 are attached to the fittings of the fluid cylinders 12 and 13 by supporting screw rods 26 having reverse screws carved into each other with the center part as a boundary, and screwed into each screw portion. The rotation of the screw rod 26 allows the fluid cylinders 12 and 13 to move toward and away from each other in the lateral direction. At this time, each sliding plate 20 of the rams 14, 15 has the same structure as the above-mentioned sliding plate 18, and each ram 14, 15 follows the horizontal movement of the fluid cylinders 12, 13 toward and away from each other. There is.

Next, the hot plate 9 is provided with a supply port 28 at the top and a discharge port 29 at the bottom in order to supply and discharge a heating medium such as hot oil or steam to the passage formed inside the hot plate 9. An insertion guide 30 having a substantially triangular cross section is formed on the side surface of the plate body 16 located on the carry-in side.

Further, a pair of notch grooves 31 are bored at an arbitrary interval in the lower part of the hot plate 9, and a conveyor consisting of a plurality of rolls for carrying in, supporting, and carrying out the plate 16 to be processed is provided below the notch grooves 31. The conveyor 32 is arranged between the machine frames 33 on the lower cross beam 2. At this time, a pair of push-up bodies 34 are inserted into the pair of notched grooves 31 and have a length approximately equivalent to the length of the hot plates 9 of all stages when the press is opened. .

Next, brackets 35 are placed on the left and right upper and lower parts of the hot plate 9 and the left and right movable plates 10 and 11, or on both upper and lower sides as shown in the figure, that is, near the four corners that do not interfere with the loading and unloading of the plate 16 to be processed. A gate-shaped regulating device 36 is attached between these adjacent brackets 35.
are mutually bridged, one end of which is attached to the bracket 35, and the other end is made a free end, so that the free end of the restrictor 36 is locked to the bracket 35 when the press is opened, and the hot plate 9 and the left and right movable plates 10 , 11 are maintained evenly.

Furthermore, left rotating wheels 37, 37' and right rotating wheels 38, 3 are provided on both upper sides of the left and right frames 3, 4.
8' is pivotably fixed, and the left side faces left and right,
Connecting members 39, 39' such as chains, ropes, wires, etc. are installed between the right rotating wheels 37, 38 and 37', 38'.
are suspended endlessly through appropriate guides (not shown) and maintained in a tensioned state. On the other hand, left locking tools 40, 40' and right locking tools 41, 41' are protruded and fixed to both upper sides of the left and right movable plates 10, 11, respectively, and the linking members 39, 39' and the left, It is assumed that the right locking tools 40, 40', 41, and 41' are connected and fastened.

At this time, what is shown in FIG.
40' are fixed and protruded from both sides of the upper part of the left movable platen 10 so as to face each other, and the linking member 3 of the inner track is fixed.
9, 39', while the right locking tool 41, 41'
are fixedly protruding from both sides of the upper part of the right movable platen 11 in mutually opposite directions, and are attached to the outer raceway linking members 39, 3.
It is fixed at 9'.

In addition, the one shown in FIG.
0' and the right locking tools 41, 41' on the left movable platen 1.
0 and the right movable platen 11 in the same direction from both sides, and are fixed to the linking members 39 and 39', and in both cases, the left and right rotating wheels 3
The left and right movable plates 10, 11 are equally expanded and contracted by the forward and reverse movements of 7, 38 and 37', 38'.

Next, the action will be explained.

First, when the left and right fluid cylinders 12 and 13 are operated to reduce the rams 14 and 15, the left and right movable plates 10 and 11 and the heat plates 9 of each stage are suspended from the upper cross beam 1 by the moving member 8. Hold the ruler 6 and the engaging part 7
While one side is maintained in a parallel state by the engaging movement of , it expands and moves in the left-right direction in the figure along the rail 5.

During this movement, the left and right movable plates 10, 11 are locked to the linking members 39, 39' which are always kept in tension, so even if either of the left or right becomes retractable, the amount of expansion will be limited. The heat plates 9 at each stage are regulated evenly, and the heat plates 9 at each stage are fitted with regulating tools 36 at their four corners in order from those adjacent to the left and right movable plates 10 and 11.
comes into contact with the bracket 35 and restricts its maximum opening, thereby maintaining equal left-right spacing between the hot plates 9 at each stage, resulting in the press being in an open state.

Next, the plates 16 to be processed are carried in all at once from the loader located on the carry-in side between the hot plates 9 in each stage where a heating medium is supplied and maintained at the required temperature. If the dimensions of 16 are different, the pressure points are adjusted each time.

For example, as shown in FIG.
If the dimensions of the stepping screw 22 change only in the vertical direction, the screw movement of the step feed screw 22 or the vertical movement fluid cylinder 23
Due to the operation of the left and right fluid cylinders 12, 13
In addition, the vertical positions of the rams 14 and 15 are adjusted. In addition, as shown in FIG. 7, when the dimensions change proportionally in the vertical and horizontal directions, the rotation of the screw rod 26 causes the movable pieces 27 of each screw portion to move toward and away from each other, and the left and right fluid cylinders 12, 13 and Ram 1
The positions of 4 and 15 in the lateral direction are also adjusted so that the pressurizing point is located at the center according to their dimensions.

After this adjustment, the plate 16 to be processed is transferred to the conveyor 3.
2, and is conveyed to the central position in the longitudinal direction of the hot plates 9 of each stage, and stopped at that position. At this time, if the push-up body 34 is projected from below the conveyance surface into the notch groove 31, the plate body 16 to be processed on the conveyor 32 is lifted.
It is inserted between the hot plates 9 in a substantially upright manner.

Next, by operating the left and right fluid cylinders 12 and 13 to extend the respective rams 14 and 15, the left and right movable plates 10 and 10, which are locked to the linking members 39 and 39',
11, no matter which one of the left and right is pushed, the amount of contraction and closing is maintained evenly and the same amount approaches, and the heating plates 9 at both adjacent ends expand and close in order toward the heating plate 9 located in the center. The press is then closed, and the plate 16 to be processed is heated and pressurized.

Thereafter, the press is opened as described above, and the heated and pressurized processed plate is carried out to an unloader.

As described above, according to the present invention, frames are installed on the left and right sides via a pair of upper and lower cross beams arranged at arbitrary intervals, and a plurality of heating plates and A pair of left and right movable plates are engaged by movable members protruding from both upper sides thereof, and rams of fluid cylinders respectively disposed on the left and right frames are attached to the back of each movable plate; Rotating wheels are pivotally fixed to both sides of the upper portions of the left and right frames, linking members are suspended endlessly between the left and right rotating wheels facing each other, and each linking member is attached to the upper portions of the left and right movable plates. Since it is fixed to the locking devices placed on both sides, the press opening and closing movements that make up the press cycle are maintained evenly, and the time required for this is also halved, improving work efficiency. It is possible to improve the

In particular, even if the fluid supply and discharge from the fluid pressure unit is caused by malfunction of the distribution valve, piping resistance, etc., and one of the fluid cylinders operates first, the left and right movable plates are connected to the connecting member. Since they are connected to each other, when the press is closed, they each act as a pushing force and contract and close by the same amount, and when the press is opened, they act as a pulling force and expand by the same amount. For this reason,
The synchronized control system attached to the fluid pressure unit,
It is also possible to make it unnecessary to some extent.

Furthermore, when the press is closed, the time that the plate to be processed is left between the hot plates in each stage without being pressurized is halved, which prevents the adhesive from accelerating heat curing. One of the causes of poor adhesion in the body can be avoided.

During heating and pressurization, the plate to be processed receives fluid movement from both the left and right sides, so the thickness and thickness of each plate itself
It is possible to enjoy elastic pressurization in an inclined state, and it is possible to eliminate another cause of poor adhesion in the treated plate after heating and pressurization.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the device of the present invention;
Figure 2 is a plan view showing another embodiment of Figure 1;
The figure is a side view, FIG. 4 is a perspective view of the same main part, and FIG. 5 is an explanatory diagram showing the vertical movement of the fluid cylinder and ram.
FIGS. 6 and 7 are explanatory diagrams showing other embodiments of FIG. 5. 1... Upper cross beam, 2... Lower cross beam, 3... Left frame, 4... Right frame, 5... Rail, 8... Moving member, 9... Hot plate, 10... Left movable plate, 11... …
Right movable platen, 12...Left fluid cylinder, 13...Right fluid cylinder, 14...Left ram, 15...Right ram, 32...Transport conveyor, 35...Bracket, 36...Restrictor, 37, 37 ′... Left rotation wheel,
38, 38'... Right rotation wheel, 39, 39'... Linking member, 40, 40'... Left locking tool, 41, 41'...
...Right latch.

Claims (1)

[Claims] 1 Frames are installed on the left and right sides via a pair of upper and lower cross beams arranged at arbitrary intervals, and multiple stages of heating plates and a pair of left and right movable plates are mounted on the upper sides of the rails placed on each of the upper cross beams. A ram of a fluid cylinder, which is engaged by a movable member protruding from the frame, and which is disposed on each of the left and right frames, is attached to the back of each movable platen, and further on both upper sides of the left and right frames. Each of the rotating wheels is pivotally fixed, and a linking member is suspended endlessly between the rotating wheels facing each other on the left and right sides, and each linking member is fixed to a locking device disposed on both upper sides of the left and right movable plates. A pressurizing device for a horizontal multi-stage press.