JPH05322Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is based on the method of applying adhesive thread impregnated with adhesive to the surface of a veneer veneer cut to a certain width in the conveying direction so that the mutual end faces This invention relates to an improvement of an impregnated gluing block used in an impregnated gluing device for a veneer cross-cutting machine that joins veneer sheets in a blind shape while abutting them.

[Conventional technology]

For example, the impregnated gluing device for the veneer cross-seaming machine according to the prior art is disclosed in Patent No.
No. 1269491 (Special Publication No. 59-45481) There is an impregnated gluing device for a veneer veneer horizontal stripping machine. This device is equipped with a tank for heating and melting hot melt resin and storing it, located near the transport level of the transport conveyor, and a hot melt resin flow path whose upper end communicates with the discharge port of the tank below the transport conveyor. Further, a resin-impregnated welding device provided with a glue reservoir chamber communicating with the flow path and a yarn path communicating with the glue reservoir chamber is installed between the conveyor and the flow path, and a yarn reel of the yarn path. This is an impregnated gluing device for a veneer side splicing machine with an outlet facing the surface of the veneer veneer, and the impregnated gluing block consisting of the resin impregnated welder has a head difference between the gluing block and the tank installed near the conveyance level. An adhesive made of molten melt resin is naturally supplied into the impregnated gluing block, and the yarn fed out into the thread path of the impregnated gluing block is impregnated with the adhesive, so that the conveyed veneer veneers are glued together. It is configured to obtain adhesive threads that connect in a shape.

[The problem that the idea aims to solve]

The impregnated gluing block in the impregnated gluing apparatus described in the prior art section is such that an adhesive made of molten hot melt resin is naturally supplied into the impregnated gluing block due to the head difference between the block and the tank installed near the conveyance level, and the impregnated gluing block is The adhesive is impregnated into the yarn fed out into the thread path of the gluing block to obtain the adhesive yarn that connects the conveyed veneer veneers together in a blind pattern, so the adhesive impregnation rate is higher than the veneer. It is governed by the amount of adhesive reinforcement relative to the amount of adhesive thread drawn out, which is equal to the amount of conveyance of the veneer, and in many cases the amount of reinforcement of adhesive is slow due to natural supply due to the head difference between the impregnated gluing block and the tank. Since the amount of adhesive thread being paid out is activated instantaneously with the arrival of the conveyed veneer veneer, the replenishment of adhesive is delayed, and as a result, the impregnation rate at the initial stage of feeding is not adjusted until the final amount of one conveyed veneer veneer is to be connected. Not only was it impossible to maintain the adhesive, but the impregnation rate was dependent on the gravitational pull caused by a slight drop, and was therefore significantly affected by the viscosity of the adhesive, making stable impregnation for a long period of time difficult.

Therefore, in order to eliminate the drawbacks of this type of impregnated gluing block, which is the prior art, the present invention is designed to directly press and abut the notch-shaped opening/closing bottom surface of the rotation control valve against the adhesive inlet communicating with the thread path of the impregnated gluing block. The opening/closing operation by sliding the adhesive bottom surface, which is always strongly pressed, and the automatic replenishment operation against wear, prevent leakage of the adhesive, which is moderately pressurized to eliminate the influence of viscosity. The object of the present invention is to improve an impregnated gluing block that functions to ensure that a predetermined amount of adhesive reinforcement is applied each time while strictly preventing the adhesive from being applied over a long period of time.

[Means to solve the problem]

In order to achieve the above object, the present invention consists of a plurality of units constructed in parallel between the rows of the conveyor conveyor so that adhesive thread is fed out onto the surface of the conveyor veneer veneer so that they can be connected in the form of a blind. This is an impregnated gluing block in an impregnated gluing device of a board side stitching machine.

a Thread path that unwinds the thread in the conveying direction of the plywood veneer.

b. An adhesive inlet for impregnating the yarn connected to the yarn path with an adhesive.

c. A rotation control valve with a notch-shaped opening/closing bottom fitted vertically into the injection port so as to be able to freely come into contact with it.

d. A spring that is pivotably mounted to press the opening/closing bottom surface of the rotation control valve against the injection port.

[Effect]

The rotation control valve installed in the impregnated gluing block of the present invention detects the arrival of the conveyed plywood veneer using a veneer detector such as a photoelectric switch installed on the conveyor, and attaches it to the rotation control valve. By activating the operating mechanism such as an air cylinder in a time-limited manner, the bottom surface of the rotation control valve for the adhesive injection port is opened for a while, and the pressure is applied to an appropriate level to eliminate the influence of viscosity. , for example, under a pressure of about 10 kg/ ^cm2 , an appropriate amount of adhesive, for example, about 0.7 g per unit length (m) of thread payout, is continuously injected into the thread path from the injection port and distributed. Impregnate the thread in the process. The threads made of synthetic fibers flowing through the thread path are impregnated with an adhesive such as hot melt resin to become adhesive threads, and are fed out while being pressure-affixed to the surface of the transport veneer veneer. Connect the boards to each other in the form of a blind. In addition, the impregnating action of the adhesive by the impregnated gluing block of the present invention at this time is due to the fact that the notch-shaped opening/closing bottom of the rotation control valve is always strongly pressed against the adhesive inlet from the vertical direction by a spring. Accurate opening/closing action by sliding of the bottom surface of the rotary control valve and replenishment of an appropriate amount of adhesive by moderate pressure force not only maintain a predetermined impregnation rate from beginning to end, but also prevent wear of the opening/closing bottom surface of the rotation control valve. Even if adhesives such as hot-melt resin are pressurized, leakage from the opening/closing parts is completely prevented, and the pressure is refilled one after another by the action of the spring. The accompanying adhesive supply and cutoff operations can now be performed semi-permanently and accurately.

〔Example〕

Figures 1 to 4 show an example of the implementation of the present invention, in which a head block 7 made of carbon tool steel or the like is bored in the conveying direction of the veneer veneer with its discharge side facing upward. An adhesive injection port 3 is bored at the lower middle of the yarn path 2 so as to communicate with the yarn path 2. In addition, on the thread 1 introduction side of the thread path 2, a hole is made slightly thinner than the thickness of the thread path 2 so as to prevent backflow of the adhesive and to prevent wear caused by the introduction of the thread 1, so that it can be replaced. A clue 8 is attached. In this case, by projecting the thread 8 somewhat outward as shown in the figure, its cooling effect increases the viscosity of the adhesive staying nearby and also functions to prevent leakage due to backflow. In addition, as illustrated in FIGS. 3 and 4, the adhesive injection port 3 has a rotation control valve 5 made of steel bar or the like having a cutout-shaped opening/closing bottom surface 4. It is vertically fitted in a main body block 9 made of aluminum alloy or the like so that it can be freely accessed. Furthermore, a spring 6 is mounted on the rotation control valve 5, and the spring 6 is configured to be able to strongly press the opening/closing bottom surface 4 against the inlet 3 at all times, so that the inlet 3 and The opening/closing operation in close contact with the opening/closing bottom surface 4 and the automatic replenishment operation accompanying wear of the opening/closing bottom surface 4 are performed semi-permanently. The rotation control valve 5 also has a glue reservoir 11 and a flow groove 1 for freely delivering the adhesive flowing from the adhesive flow path 10 of the main body block 9 to the opening/closing bottom surface 4.
2 is formed, an O-ring 13, a bearing 14, etc. are also mounted on shafts, and are freely rotatable back and forth in the directions of arrows by an actuating mechanism (not shown) such as an air cylinder connected to a lever 15. It is composed of

When a thermoplastic adhesive such as a hot melt resin is used as the adhesive, it goes without saying that a heater 16 is embedded in the main body block 9 to maintain the entire impregnated gluing block at a predetermined temperature.

[Effect of idea]

As described above, the present invention has a structure in which the notch-shaped opening/closing bottom surface of the rotation control valve is directly pressed against the adhesive inlet communicating with the thread path of the impregnated gluing block.
Not only does the opening/closing operation of the inlet and the notch-shaped opening/closing bottom surface depend on the sliding movement of the close contact bottom surface, which is always in strong pressure contact with a spring, but also the wear of the opening/closing bottom surface is successively pressed by the spring. Since the adhesive is refilled, even adhesive such as hot melt resin under moderate pressure is completely prevented from leaking from the opening/closing bottom surface, and the operation of supplying the appropriate amount of adhesive due to pressurized injection is completely prevented. The shutoff operation is now performed semi-permanently and accurately, and the initial unwinding of the adhesive thread due to the delay in replenishing the adhesive, which was caused by conventional devices of this type that relied on gravity due to a small drop, has been improved. Transport veneer veneer 1 to connect impregnation rate
This is an extremely effective device that has been able to eliminate all of the drawbacks such as not being able to maintain the adhesive until the end of the sheet, and the impregnation rate being unstable due to significant changes in the viscosity of the adhesive.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of the main part, Fig. 2 is a plan view of the headblock with a thread path and adhesive inlet, Fig. 3 is a side view of the rotation control valve, and Fig. 4 is a cutaway form. It is a top view of the opening and closing bottom. 1... Thread, 2... Thread path, 3... Adhesive injection port,
4...Notch type opening/closing bottom surface, 5...Rotation control valve, 6...
…spring.

Claims (1)

[Claims for Utility Model Registration] 1. Yarn path 2 that feeds yarn 1 in the conveying direction of the veneer veneer
, an adhesive injection port 3 for impregnating the yarn 1 with adhesive, which communicates with the yarn path 2, and a rotation control valve 5 in which a notch-shaped opening/closing bottom surface 4 is fitted vertically into the injection port 3 so as to be able to freely come into contact with the adhesive injection port 3. and the opening/closing bottom surface 4 of the rotation control valve 5.
An impregnated gluing block in an impregnated gluing device for a veneer cross-cutting machine, which comprises a spring 6 that is pivotably mounted on the injection port 3 so as to be freely pressable. 2. An impregnated gluing block in an impregnated gluing device for a veneer cross-stitching machine according to claim 1, wherein the yarn opening 8 is attached to the yarn introduction side of the yarn path 2 so as to protrude somewhat outward.