JPS58224703A - Method of joining wood - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention of Hitoshi relates to a method for joining wood, particularly a method for joining wood suitable for manufacturing lumber cores.

The conventional lamp part 1 manufacturing method had the following drawbacks. In other words, adhesive is applied to the joining surface (wood end surface) of each sawn lumber, and then the lumber cores are manufactured by bringing them together, so adhesive is applied to each sawn lumber one by one. Productivity is reduced due to the laborious work and the work that requires care to join the sawn wood in parallel while conveying it so that the adhesive does not stick to the conveyor etc. It had the disadvantage of being low. In addition, when the sawn timbers are pressed together in parallel, the adhesive must be applied evenly to the joint surfaces of the sawn timbers so that the adhesive does not protrude from the joint surfaces and the joint is sufficiently performed. However, the disadvantage is that the adjustment is difficult.

This invention involves winding threads coated with thermoplastic synthetic tung fat around the outer peripheral surface of an aggregate of wood (for example, sawn wood), and then pressing the threads onto the aggregate while melting the thermoplastic synthetic resin. The purpose of this invention is to eliminate the above-mentioned drawbacks and provide a method for joining nine pieces of wood. As mentioned above, this invention was made to eliminate the drawbacks of the conventional lumper core manufacturing method, but it goes without saying that wood other than sawn wood can also be joined by this invention. do not have.

Embodiments of the invention will be described below with reference to the drawings.

Fig. 1 shows the yarn used in the method of this invention (in this specification, the term yarn includes strings and strings).
An example of a manufacturing machine 1 is shown. In this figure, a plurality of thread winding shafts 2 are arranged on the left side so that their axes coincide with each other. In the description of the figures, the same applies hereinafter.), a resin tank 6 containing a thermoplastic synthetic resin such as vinyl acetate resin (preferably one containing 5 to 60% by weight of kaolin as a thickener) is placed. Thread insertion holes 4, 4 are formed in the rear side wall of the resin tank 6 111J, and a pair of upper rollers 5, 5 and 6 are provided in the vicinity of the thread insertion hole 4.4. A lower roller 6 is provided which is adapted to be immersed in synthetic resin PvC. A known dry kiln 7 is provided in front of the resin tank 6, and in front of the dry kiln 7, the same number of thread winding shafts 8 as the thread winding shafts 2 are arranged.

When using the above-mentioned production 4M&1, first attach the thread 9 wound with a thread T not coated with the thermoplastic synthetic resin P, for example, a thread T of polyester resin, to the thread winding shaft 2, and then pull out the thread T. ．． The thread T is introduced into the resin tank 5 through the thread insertion hole 4 in the front part, and the thread T is passed through the rear upper roller 5, the lower row 26, and the front upper roller 5, and then passed through the thread insertion hole 4 in the front part to the resin tank 5. It is pulled out from the fat tank 6, then passed through a dry kiln 7, and attached to a spool 10 attached to a spool shaft 8. After such preparation, the yarn T can be coated with the thermoplastic synthetic resin P by operating the manufacturing machine 1. That is, the dry kiln 7 is heated to 110°C to 160°C.
By rotating the thread winding shaft 8, that is, the front thread winding 10 while maintaining By moving the thread in about 20 to 50 seconds, a thread Tt coated with the thermoplastic synthetic resin P and a spool IOK are formed. It is wound into the system winding 10. The thermoplastic synthetic resin coated on the 4T is semi-dry so that the wound threads T do not adhere to each other so that thermal melting in the next step can be carried out efficiently.

FIGS. 2 and 6 show an example of a wood joining apparatus 14 used to carry out the method of the present invention. In the description of these figures, the front refers to the left side of Figure 2, the rear refers to the right side of Figure 2, the left refers to the left side of Figure 6, and the right refers to the right side of Figure 6. A roller conveyor 17 is provided at the rear upper part of the machine frame 16 having a pair of left and right side walls 15. Kaitonol18. +8 is provided. Notch 19 in front side wall 15.15 of conveyor 1
．． 19 is formed, and a pair of front and rear fixed ring bodies 20°20 are fitted into these notches 19°19, and the inside and I
It is fixed to the side wall 15° 15 so as to be located in the middle of the conveying surface of the Jft conveyor 17 and slightly above O. A plurality of flanged rows 921 are rotatably provided on the fixed ring body 20, 20 at predetermined intervals so as to face each other. The rotating body 2 is attached to these rollers 21
2 is rotatable and supported by Hiko'J so as not to move back and forth. A thread winding holder 26°2 is mounted on the outer circumferential surface of the rotating body 22 at positions 180° apart from each other.
3 are stored therein, and a thread spool 10 around which a thread T coated with a thermoplastic synthetic resin P is wound is stored therein. The rotating body 22 has a thread winding holder 25.
．． Thread insertion holes 24 and 24 are bored corresponding to 25. An internal gear 25 is formed on the rear inner surface of the rotating body 22, and an output shaft 2 of a motor 26 is connected to the internal gear 25.
Four binions 28 attached to 7 are connected.

With such a configuration, by rotating the motor 26 at a low speed, the rotating body 22 can be rotated at a low speed.

The required parts include a lower heating roller and a filter for melting the thermoplastic synthetic resin. As the lower heating roller 3o, a known heating roller such as a hollow a-ra having a heating steam passage therein or a roller having a built-in heater is used. The upper heating roller 31 is mounted on the protrusion +5 of the side wall 15.15 so as to face the lower heating roller 6o.
a, 15aIL, ly > / (-thickness D of core L
It is provided so that its position can be changed in the vertical direction so as to correspond to changes in the area.

Further, a side addition 11% o-tsu 32 is provided so as to be located between the protrusion +5aKU and the roller conveyor 290, and its position can be changed in the left-right direction. Heating roller 31.
The structure of 52 is also similar to that of heating roller 6o. Note that it is of course possible to use a heating means such as a heating plate instead of the heating rollers 50, 31, and 52.

Next, the method of the present invention will be explained by taking as an example a case where a lumber core L is manufactured using the above-mentioned joining device 114.

First, corresponding to the width W and thickness D of the lumbar core L to be manufactured, the positions of the upper and side heating rollers 51 and 62 and the position of the rear sight rail 18 are set to 1111.
Next, each spool halter 26 is covered with a semi-dry #1 plastic synthetic 81 resin wrapped spool 10.
is attached, and the thread T is guided into the interior of the rotating body 22 through the thread insertion hole 24ft.

After that, from the rear roller conveyor 17 side, sawn wood U!
A collection 12 made up of a collection of threads is sent in, and each end of two threads T is attached to each of the left and right outer surfaces of the tip thereof.

After such preparation, the joining device 14 is activated and the roller conveyor 17 is activated to send the assembly i forward at a predetermined speed, and while passing through the rotating body 22, the assembly i is Wrap it around the book thread (Tft aggregate). That is, by rotating the rotating body 22 clockwise in FIG. It can be wrapped around a body (aggregate).

Incidentally, it goes without saying that the thread T is automatically let out from the thread spool 10 by the length of the wrapped thread. Since the yarn T'Jk is wound around the aggregate J while feeding it in this manner, the yarn TVi is wound around the aggregate J in a spiral. In this way, the assembly 1 in which the two threads T are wound is sent to a position where the upper and lower heating rollers 51 and 50 and the side heating roller 62 are provided, and while passing through this position, , the upper and lower heating rollers 31 and 30 pinch the aggregate in the vertical direction, and the side heating rollers 762 pinch it in the left-right direction, so that the yarn T is compressed into the aggregate 1Vc.
While pressing, the covering plastic synthetic resin P is melted and the sawn material 0 is joined. As long as the conveyor 17 continues to supply the aggregates, the sawn timbers will be joined continuously in the manner described above. Heating roller 60. The aggregate joined by the threads T coming out of the filters 1 and 62 is cut into a predetermined length by a cutting device 1 (not shown) to form a lumber core b.

When the end of the series of aggregates approaches the rotating body 22, the joining device 14 is temporarily stopped, the thread T is manually wound to the end by the worker, and then the thread T is cut and the cut end is After identifying the aggregate and the end of J, use the joining device + 4i again.
J and completely send out the assembly l from the joining device 14 [72]. Next, to join the sawn wood V of the next aggregate I, rz, the same operation as in 1JrJ? Needless to say, I repeat this. In short, the starting and ending ends of the thread T are fixed to the aggregate IVC manually by a worker.

Note that the thread T does not necessarily have to be wound spirally, but may be wound annularly at predetermined intervals. In this case, the assembly J is conveyed simultaneously, and the rotating body 22 is rotated when the assembly J is stopped. Note that the starting and ending ends of the thread T wound around the aggregate are handled by the worker in the same manner as described above.

As described above, according to the method of the present invention, after winding the thread coated with 41t of thermo-Roe plastic synthetic resin around the outer circumferential surface of the wood aggregate, the thread is gathered while fgming the heat ll11' plastic synthetic resin. This method joins wood by pressing it against the body, and unlike the conventional method, there is no need for the troublesome effort of applying adhesive to each piece of wood, so productivity can be improved. Furthermore, since the adhesive is not applied to the joint surface of the wood, there is no possibility that the adhesive will ooze out from the joint surface. Furthermore, since the wood is firmly fixed with thread, it is possible to prevent the wood from warping or bending.

[Brief explanation of the drawing]

Fig. 1 is a partially exploded side view showing a thread manufacturing machine used in the method of this invention, and Fig. 2 is a longitudinal cross-section of an example of a wood joining device used in the actual method of this invention. FIG. 5 is a cross-sectional view taken along the line 11--III in FIG. C...Sawn wood J...Aggregation T...Thread P...Heat 0J plastic synthetic resin Mu...Lamper core patent applicant Mizudai Sangyo Co., Ltd. Figure 1 Figure 2 Figure 1■'' ■ Figure 3

Claims (1)

[Claims] t A plurality of pieces of wood are gathered together to form an aggregate, a thread coated with a thermoplastic synthetic resin is wound around the outer peripheral surface of the aggregate, and the thermoplastic synthetic resin is melted while A. A method for joining wood, which is characterized in that the wood is joined by pressure welding to an aggregate. 2. The method of joining wood according to claim 1, wherein the aggregate is a lumper core. & The method for joining wood according to claim 1, wherein the thread is wound spirally around the aggregate. 4. The method for joining wood according to claim 6, in which two or more threads are wound around the aggregate at the same time.