JPS6111761B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention aims to cut the front and back defective parts by cutting off the front and rear veneer veneers using an automatic cutting device, etc., and while continuously transporting the veneer veneer, Apply adhesive to the surface of the plywood veneer, continue to transport it, and push out the veneer veneer intermittently while abutting the end face of the front edge against the end face of the trailing edge of the veneer veneer, or The present invention also relates to a gluing device for a veneer veneer cross-cutting machine that continuously conveys a leading veneer veneer and a succeeding veneer veneer while colliding with each other due to a speed difference, thereby obtaining cross-stitched veneers joined in the form of a blind.

(Prior art) Conventional gluing devices of this type include, for example, the
-40401 and JP-A-54-70409, but in the former case, a gluing block is installed directly below the conveyor, and the end of the slope of the gluing block is glued. Since the structure has a protruding surface that collides with the end surface of the front edge of the veneer veneer, each time the front edge of the veneer veneer arrives and the end surface collides with the protruding surface of the gluing block. Accurate timing adjustment is required because descending control must be done in a timely manner.
The overall defect was that it lacked high-speed compatibility, and the distance between the trailing edge of the preceding veneer and the leading edge of the following veneer, that is, the gap, was at least as large as the protrusion from the adhesive outlet of the gluing block. If the veneer veneers are delivered at a distance of at least 80 mm or more from the surface, the protruding surface of the gluing block may damage the rear edge of the preceding veneer, or Or, there was a serious functional defect such as the inability to apply adhesive to the end surface near the leading edge of the trailing veneer, and in the latter case, the failure of the leading and trailing veneers If the spacing is set close to each other, the tip of the swinging nozzle will be received by the upper surface of the front end of the succeeding veneer before the discharge port of the swing nozzle has returned to its original position, causing the discharge port to The adhesive cannot be applied to the leading edge of the trailing veneer, and therefore the leading and trailing veneers must be spaced apart, resulting in slower working speeds and reduced speed capability. There were chips and defects that significantly reduced work efficiency.

(Objective of the Invention) The present invention completely eliminates the serious functional defects of the above-mentioned conventional device, and is capable of bonding even when the veneer veneers are conveyed at high speed and the distance between the veneer veneers is extremely small. Enables the agent to be reliably applied to the end surface,
It is an object of the present invention to provide a gluing device with highly simplified functions and high working efficiency.

(Structure of the Invention) In order to achieve the above object, the present invention applies an adhesive to the end face of the leading edge of the veneer veneer that is continuously conveyed by a conveyor, and then applies adhesive to the trailing edge of the preceding veneer veneer. In a veneer veneer cross-splitting machine that obtains cross-splitting veneers that are joined in the form of a blind by abutting against the end faces of sections, a veneer veneer is installed directly above the conveyor for gently guiding the veneer veneers downward from the carry-in side toward the discharge side. A gluing block having an inclined surface formed therein and having a discharge port for discharging an appropriate amount of adhesive and a control valve communicating with the discharge port is fixedly installed in the middle part of the veneer veneer guiding slope, and It is constructed by installing a reciprocating mechanism such as an air cylinder between the rows of conveyors below the loading side of the gluing block, and installing a sliding conveyor that lifts the front edge of the succeeding veneer veneer each time.

(Example) An example of implementing the present invention will be described below with reference to the drawings. First, the end surface 2a of the front edge of the veneer veneer 2 that is continuously conveyed by the conveyor 1
The adhesive 3, for example, a thermoplastic adhesive 3 such as a hot melt resin, is applied to the veneer veneer 2b, which is joined to the end face 2c of the trailing edge of the preceding veneer veneer 2b in the form of a blind. In the veneer veneer cross-cutting machine for obtaining veneer veneers, a veneer veneer guiding slope 4a is formed directly above the conveyor 1, and the veneer veneer guiding slope 4a is gently directed downward from the carry-in side to the carry-out side. A gluing block 4 equipped with a discharge port 5a for discharging an appropriate amount of adhesive 3 and a control valve 5 communicating with the discharge port 5a is fixedly installed between the rows of conveyors 1 below the input side of the gluing block 4. The structure includes a sliding conveyor 6 which is equipped with a reciprocating mechanism such as an air cylinder 7 and which slides the front edge of the succeeding veneer veneer 2 upward each time. In addition, 6a in the figure is a veneer pressing roll, and 4b
4c is a heater for maintaining the molten state required when the adhesive 3 used is a thermoplastic adhesive such as hot melt resin, and 4c is an adhesive supply port from a separately provided adhesive tank. . Furthermore, the control valve 5 is connected to an attached air cylinder 5b.
A reciprocating mechanism consisting of a lever 5c rotates a rotary valve 5d to discharge an appropriate amount of adhesive 3 in a spot from a discharge port 5a, and an air cylinder 5b of the control valve 5 and an air cylinder 5b of the control valve 5 and the The air cylinder 7 of the sliding conveyor 6 is operated as appropriate by a detection signal of the front edge of the veneer veneer 2 by a veneer detector 8, which consists of a photoelectric switch, a limit switch, etc., installed on the transport conveyor 1 on the input side of the sliding conveyor 6. It is configured to be controlled.

Next, the operation of the gluing device configured as described above will be explained along with the flow of the veneer veneer 2 with reference to FIGS. (See Figure 1). Next, the veneer veneer 2 is conveyed by the conveyor 1, and the sliding conveyor 6
When the single plate detector 8 installed on the loading side of the rotary valve 5 detects the front edge of the rotary valve 5, it transmits the detection signal to the air cylinder 5b of the control valve 5.
b is rotated to discharge an appropriate amount of adhesive 3 in a spot from the discharge port 5a (see FIG. 2). Next, when the front edge of the veneer veneer 2 that has passed the veneer detector 8 reaches below the gluing block 4, a detection signal from the veneer detector 8 is sent to the air cylinder 7 of the sliding conveyor 6. As a result, the sliding conveyor 6 is moved upward and pinched together with the veneer presser roll 6a, so that the front end surface 2a of the veneer veneer 2 moves along the veneer veneer guiding slope 4a of the gluing block 4. , a discharge port 5 provided in the middle of the
The adhesive 3 that has already been spewed out in spots from point a is scraped off with the end surface 2a, and the adhesive 3 is applied thereto (see FIG. 3). When scraping the adhesive 3 from the end face 2a of the front edge of the veneer veneer 2, the adhesive 3 discharged in spots from the outlet 5a of the gluing block 4 is affected by gravity and It is safely applied without going around to the top surface. Next, at the time when the end surface 2a of the front edge of the veneer veneer 2 has finished passing through the discharge port 5a or when it has finished passing through the gluing block 4, the sliding conveyor 6 returns to its normal state and the next succeeding veneer veneer arrives. In addition to preparing the veneer veneer 2 during the transportation process,
b abuts against the end surface 2c of the rear edge (see Fig. 4). The veneer veneers 2 and 2b with their end surfaces 2a and 2c abutted against each other are conveyed to the end of the conveyor 1 illustrated in FIG. 1, and are joined into cross-cut veneers in the form of a blind. Although a control circuit for adjusting the activation timing of the air cylinder 5b of the control valve 5 and the air cylinder 7 of the sliding conveyor 6 is not shown, a well-known magnetic memory that can appropriately delay the detection signal from the single plate detector 8 is used. , a shift register, a timer, and other delay elements may be used.

(Effects of the Invention) As described above, the present invention uses the air cylinder 7 to move the sliding conveyor 6 upward each time the end surface 2a of the front edge of the veneer veneer 2 reaches the gluing block 4 for guiding the veneer veneer. Since the adhesive 3 discharged in spots from the discharge port 4a provided in the middle of the inclined surface is scraped off and applied to the end surface 2a, unlike the conventional device, the adhesive 3 is not applied to the preceding veneer. The distance between the end face 2c of the trailing edge of the board 2b and the end face 2a of the leading edge of the succeeding veneer veneer 2 that is subsequently conveyed is not a particular problem, and in extreme cases, even if they are almost close to each other. Since the trailing edge of the preceding veneer veneer 2b falls downward, the end surface 2 of the following veneer veneer 2
It is possible to apply the adhesive 3 to a, and the timing for controlling the sliding movement of the sliding conveyor 6 is also the timing when the end face of the front edge of the veneer veneer abuts against the protruding surface of the gluing block, as in the conventional device. Compared to the case where the timing had to be adjusted accurately, the timing can be adjusted very roughly, so it is compatible with high speed overall. Adhesive 3 is discharged in spots from the discharge port 4a onto the upper surface of the veneer veneer 2 that will serve as the surface.
The applied adhesive 3 does not go around and stays stably on the end surface 2a under the influence of gravity, so the upper surface of the veneer veneer 2 is not contaminated with the adhesive 3.
Therefore, there is no risk of blocking phenomenon occurring even if it is deposited in the subsequent process, and the veneer veneer can be transferred at high speed and the work can be carried out with high efficiency, which is an extremely significant implementation effect that can significantly improve work efficiency. be.

[Brief explanation of drawings]

The figure shows an example of implementation of the present invention,
1 to 4 are operation diagrams. DESCRIPTION OF SYMBOLS 1...Transportation conveyor, 2, 2b...Plywood veneer, 2a...End face of front edge, 2c...End face of rear edge, 3...Adhesive, 4...Gluing block, 5...
...Control valve, 5a...Discharge port, 6...Sliding conveyor, 7...Air cylinder.

Claims (1)

[Claims] 1. While applying adhesive to the front edge of the veneer veneer that is continuously conveyed by the conveyor, this is applied to the end of the trailing edge of the preceding veneer veneer to form a sash-shaped joint. In a veneer veneer horizontal splintering machine for horizontally splicing veneers, a veneer veneer guiding slope is formed directly above the transport conveyor, and the veneer veneer guiding slope is gently downward facing from the carry-in side to the discharge side. A gluing block is fixedly installed in the middle of the surface and has a discharge port for discharging an appropriate amount of adhesive and a control valve communicating with the discharge port, and air is provided between the rows of conveyors below the input side of the gluing block. A gluing device for a veneer veneer horizontal stripping machine, characterized in that a sliding conveyor is installed with a reciprocating mechanism such as a cylinder and lifts the front edge of a succeeding veneer each time.