JPH0832431B2 - Honeycomb core joining method - Google Patents

Description

The present invention relates to a method for joining honeycomb cores.

More specifically, it is easy, and in a short time
The present invention relates to a method for joining honeycomb cores, which enables the honeycomb cores to be joined to each other with high accuracy without causing problems such as adhesive leaching.

"Prior art", "Problems to be solved by the invention" Honeycomb cores are easy to manufacture and can be molded with high precision at low cost. Once the core is molded, and the irregularities around this honeycomb core are cut and finished, several types of standard-sized honeycomb cores are mass-produced, and when the size of the honeycomb core to be used is less than the standard size. For this purpose, a standard size honeycomb core is cut to the required size, and when a size larger than the standard size is required, a plurality of standard size honeycomb cores should be used so that the size becomes the required size. A large size honeycomb core is formed by joining.

However, when a large-sized honeycomb core is formed by joining standard-sized honeycomb cores, conventionally, the adhesive used at the time of forming the honeycomb core is attached to the joining end face portion of one of the joined honeycomb cores, for example, a brush. After applying with
The joining end face portions of both honeycomb cores are joined together so that the joining end face portions of the honeycomb cores are evenly pressure-bonded to each other, and at a predetermined interval to hold such a state until the adhesive is cured, for example, joining is performed. Both honeycomb cores are temporarily fixed by a connecting tool, such as inserting a crank pin while inserting the part, that is, temporarily fixed, the adhesive is cured in a heating furnace while maintaining this state, after the adhesive is cured, Both honeycomb cores were joined by removing the connecting tool.

Therefore, it is extremely difficult to uniformly apply the adhesive to the cut end portions of the cell walls because the bonded end face portions of the honeycomb core are not flat but are formed by the cut portions of the cell walls located at intervals. At the same time, the work is troublesome, and the joint adhesive is cured in such a state that the joint end surfaces formed by the cut portions of the cell walls are slightly pressed and the cut ends of the cell walls are pressed or overlapped. Since it was necessary to temporarily fix both honeycomb cores with a connecting tool such as a crank pin, it is necessary to temporarily fix with a connecting tool at narrow intervals in order to join both joint end face parts in a straight state. In addition, the honeycomb core is easily moved during this manual work, and therefore, a step is formed on the honeycomb core surface of the seam of both honeycomb cores, and the length of the joining end face portion is long. Since likely to occur is a shift also directed, this temporary stop work had to be carefully done. Therefore, it has been pointed out that this temporary fixing work is extremely troublesome and requires a lot of man-hours, and that the applied adhesive easily drips or oozes out onto the honeycomb core surface by pressure welding at the time of joining, In some cases, it is necessary to perform work such as scraping off the adhesive that has leaked out and cured after joining.

The present invention has been made in view of the above circumstances to solve the problems of the above-described conventional example, and does not require temporary fixing work by a connecting tool such as a crank pin which is extremely troublesome and requires a lot of manpower. In addition, there is no step on the honeycomb core surface of the seam of both honeycomb cores, and there is no problem such as displacement in the longitudinal direction of the joining end face portion, and it is possible to easily obtain a large-sized honeycomb core of excellent quality. It can be molded, and the adhesive does not ooze out onto the honeycomb core surface. Moreover, it is possible to easily apply a uniform adhesive to the joint end surface. The object of the present invention is to propose a method for joining honeycomb cores that can significantly reduce the working time.

"Means for Solving the Problem" The present invention has been made to achieve the above object, the technical solution means, both honeycomb cores to be joined at least finished both side surface portion and the joint end surface portion, First, on the table, while aligning the side surface portions of both honeycomb cores, the respective bonding end surface portions are arranged in a positional relationship of facing each other at a predetermined interval, and at least the bonding end surface portion vicinity portions of both honeycomb cores are arranged. , Set along the longitudinal direction of the joint end face part over the entire length in a slightly pressure contact state with the table face. Next, a hot melt type adhesive is applied to the joint end face portion over its entire length by spraying with the application device. After application of the adhesive, at least one of the honeycomb cores is slid on the table while maintaining the set state on the table, and the two honeycomb cores are spliced together so that both joint end face portions are slightly pressed against each other. The honeycomb cores are bonded to each other by holding the state until the honeycombs harden.

"Operation" Since the present invention comprises the above means, it operates as follows. That is, on the table, when applying the hot melt type adhesive to the joining end surface portion of the honeycomb core set in the above-mentioned constant state, in advance, the blowing amount of the adhesive, between the nozzle and the joining end surface portion of the coating device. By adjusting the distance, the moving amount of the coating device and its speed, etc., the coating amount, the coating width, etc. can be easily set. Therefore, for example, the height of the honeycomb core to be bonded, its size, etc. Further, it is possible to easily apply a uniform adhesive suitable for the material and the like.

When both honeycomb cores are joined together after applying the hot-melt type adhesive, the honeycomb cores set in the above-mentioned certain state are joined together by sliding on the table while maintaining that state. Therefore, there is no need for temporary fixing work with a connecting tool such as a crank pin, which is extremely troublesome and requires a lot of man-hours, and there is a problem such as a step between the honeycomb core surfaces of each other and a deviation in the longitudinal direction of the joint end surface portions. Without this, it is possible to easily join the both honeycomb core surfaces are flat and both side surface portions are even.

In addition, since the hot-melt type adhesive has the property that it cures at room temperature in a short time, the situation in which the applied adhesive hangs down or oozes out on the honeycomb core surface due to pressure contact during splicing There are few
Moreover, since it is not necessary to cure the adhesive in a heating furnace or the like, there is no need to transfer the honeycomb core after joining, and since both honeycomb cores are joined in the joined state, excellent quality is achieved. Large size honeycomb core can be easily obtained.

"Embodiment" The present invention will be described based on an embodiment shown in the drawings.

FIG. 1 is a schematic view showing a state in which a honeycomb core is set in a honeycomb core joining apparatus for specifically carrying out the method according to the present invention, and FIG. 2 is a state in which a hot melt type adhesive is applied to a joining end face portion. It is a perspective view of the principal part showing.

First, an outline of the honeycomb core joining apparatus will be described.

In FIG. 1, 1 is a honeycomb core joining apparatus,
This honeycomb core joining apparatus 1 is configured as follows. That is, 2 is a table, and a frame 3 is erected on the table 2. Reference numeral 4 denotes a support shaft that is installed between the frames 3, and the support shaft 4 supports a base end portion of a pair of clamp devices 5. The main body of each of the pair of clamp devices 5 is composed of a cylinder 5a, a piston rod 5b, etc., and a cushioning member 7 made of an elastic material such as a rubber material is provided on the entire lower surface of the piston rod 5b at its lower end. A holding plate 6 having a length in the width direction of the affixed honeycomb core 30, that is, a length slightly longer than the length in the longitudinal direction of the joining end face portion 31, is attached in a horizontal state. The holding plates 6 are moved up and down as the piston rod 5b moves back and forth. In addition, one clamp device 5 (a clamp device located on the left side in the drawing) of the pair of clamp devices 5 is a motor 9 that is arranged in one frame 3 as a drive source and is capable of rotating in the forward and reverse directions. The gear 11 mounted on the output shaft 10 and the other frame 3
The endless belt 13 having a tooth profile formed on the inner side surface thereof hung on the sprocket 12 arranged at the base end is fixed to the cylinder 5a of one of the clamp devices 5, and the tip meshing portion 14 is fixed to the endless belt 13. It is guided by the support shaft 4 by a clamp moving mechanism 8 composed of an engaging member 15 fixed in an occlusal manner, and is movable in the left-right direction in the drawing. Further, the other clamp device 5 (the clamp device located on the right side in the figure)
Is fixed to the support shaft 4 in such a positional relationship that the holding plate 6 is located at a predetermined distance from the back surface of the coating device main body 22 arranged substantially in the center between the frames 3 to be described later.

Reference numeral 20 denotes a hot melt type adhesive application position, and this hot melt type adhesive application position 20 includes an adhesive supply device 21, an application device main body 22, and an adhesive from the adhesive supply device 21 to the application device main body 22. Adhesive supply hose for supply
The adhesive supply device 21 composed of 23 and arranged on the frame 3 uses a heater (not shown) to apply a solid hot-melt type adhesive in the adhesive supply device 21 at room temperature. Liquefaction and pump this (not shown)
It functions to supply to the main body 22 of the coating device. In addition, the coating device main body 22 disposed substantially in the center between the frames 3
Is provided with a plurality of nozzles 22a on the front surface of the main body, and in the embodiment, a nozzle 22a provided to blow out the hot-melt type adhesive 24 in the horizontal direction, and a nozzle 22a sandwiched between the nozzles 22a and the same predetermined upper and lower sides. Two nozzles 22a for ejecting the adhesive 24 at an angle are provided. Further, the coating device main body 22 can be moved up and down by a lifting mechanism and a moving mechanism (not shown) and can be reciprocated horizontally within a predetermined range.

In the drawing, 16 is a pair of guide plates arranged at left and right positions on the table 2, respectively, and these guide plates 16 can both adjust the distance between the guide plates 16. .

The honeycomb core joining apparatus 1 is roughly as described above.

 Next, a method for joining the honeycomb cores 30 will be described.

When setting the two honeycomb cores 30 to be joined, which are formed into a predetermined size by finishing the periphery by trimming, etc., first set up the holding plates 6 and the applicator main body 22 of both clamp devices 5. The guide plates 16 and the honeycomb cores 30 after being placed in the state.
Side surfaces of both honeycomb cores 30 in a state in which they are arranged in between.
While the 32 are aligned in a straight line, the side surfaces 32 of each honeycomb core 30 are adjusted in such a manner as to be in sliding contact with the pair of guide plates 16 so that their intervals, positional relationship, etc. are adjusted. Nozzle 22a of the coating apparatus main body 22 and the joining end face portion of the honeycomb core 30 to be set on the 5 side are coated with the hot melt type adhesive 24 at a predetermined interval on the joining end face portion 31 depending on the thickness T thereof. The honeycomb core 30 is slidably disposed between the pair of guide plates 16 so that the distance between the honeycomb core 30 and the guide plates 16 is a preset distance. Thus, the portion near the joint end face portion 31 is positioned in a sliding contact state between the pair of guide plates 16 in such a positional relationship that it is slightly pressed against the table 2. After arranging both honeycomb cores 30 on the table 2 in such a state, a portion of the honeycomb core 30 disposed on one clamp device 5 side in the vicinity of the joining end face portion 31 is slightly pressed onto the table 2 by the lowered pressing plate 6. The one clamp device 5 is moved to a predetermined position by the clamp moving mechanism 8 so that the above positional relationship is achieved. In addition, both clamp devices 5
The pressing plate 6 by extending the piston rod 5b of the
By lowering and pressing the portions of the honeycomb cores 30 in the vicinity of the joint end face portions 31 to the table 2 so that they are slightly pressed against each other, the honeycomb cores 30 are set on the table.

Since the honeycomb core 30 in this state is pressed against the holding plate 6 via the cushioning member 7, the surface of the honeycomb core 30 at a portion corresponding to the holding plate 6, that is,
The cell end surface is not damaged by the holding plate 6.

Therefore, in the state set like this,
Both side surfaces 32 of both honeycomb cores 30 are aligned on a straight line, and their joint end surface portions 31 are fixedly set on the table 2 in a positional relationship of facing each other with a predetermined interval. There is.

Next, when applying the hot melt type adhesive 24 to the joining end face portion 31 of the honeycomb core 30 set in such a state, the applicator main body 22 is provided in the horizontal direction by operating an elevating mechanism (not shown). Nozzle 22a is attached to the honeycomb core 3
While descending until it substantially corresponds to the center of the thickness T of 0,
The moving mechanism (not shown) causes the nozzle 22a to move to the joining end face portion 31.
Move to the position corresponding to one end of. Therefore,
The hot melt type adhesive 24 liquefied by operating the pump (not shown) of the adhesive supply device 21 is pressure-fed to the coating device main body 22 via the adhesive supply hose 23, and is joined from each nozzle 22a to the joint end surface portion. It is blown out toward 31. Simultaneously with the start of blowing the hot melt type adhesive 24, the application device main body 22 is operated by a moving mechanism (not shown) so that the application device main body 22 moves toward the other end. Is sprayed onto the joint end face portion 31 and moves along the joint end face portion 31 toward the other end portion at a constant speed. Therefore, in the embodiment, as shown in FIG. 2, the hot melt type adhesive 24 is uniformly applied to the joining end face portion 31 along the longitudinal direction thereof at a predetermined interval in three strips.

Therefore, the hot melt type adhesive 24 in an amount suitable for the material of the honeycomb core 30 to be joined by adjusting the rotational speed of the pump (not shown) and the moving speed of the coating device main body 22 in advance. It is possible to easily apply evenly.

In the example, the hot melt type adhesive 24 is applied to the joining end face portion 31 of the one honeycomb core 30, but the hot melt type adhesive 24 to the joining end face portion 31 is applied.
The coating method is not limited to the embodiment, and for example, when the thickness T of the honeycomb core 30 to be bonded is extremely large, for example, between the nozzles 22a provided on the front surface as well as the back surface of the coating apparatus main body 22. By providing a nozzle for blowing out the hot melt type adhesive 24 at an angle of 1/2, it is of course possible to narrow the application interval of the hot melt type adhesive 24, the coating width, the coating amount. As a result, the honeycomb cores 30 can be firmly bonded even when they are bonded.

At the same time as the application of the hot melt type adhesive 24 to the joining end face portion 31 is completed, the pump (not shown) of the adhesive supply device 21 is stopped, and subsequently, the elevating mechanism (not shown) is moved upward. When activated, the applicator body 22 is raised to a predetermined position.

Next, one clamp device 5 (the clamp device located on the left side in FIG. 1) is connected to the other clamp device 5.
By operating the clamp moving mechanism 8 in the direction approaching the table 2, the one clamp device 5 is used to move the table 2.
Honeycomb core 30 that was set in a slightly pressed state on the top
The table 2 is guided by the pair of guide plates 16 while maintaining the set state as the one clamp device 5 moves.
It slides up and moves toward the honeycomb core 30 set on the other clamp device 5 side. Then, as this movement progresses, first, the cut portions of the cell walls 33 forming the joint end face portions 31 of the two honeycomb cores 30 come into contact with each other.
When the movement further progresses from this contact state, the cut ends 34 are pressed against each other, bent and deformed, and joined in a state of intimate contact. When the cut end surfaces 34 of the cell walls 33 are joined to each other in such a state, the clamp moving mechanism 8 is stopped so that both honeycomb cores 30 maintain this state.

Thus, by maintaining such a state for a short time until the hot melt type adhesive 24 is cured, the both honeycomb cores 30 are joined in a state of being joined in a pressure contact state.

Therefore, a defect such as a step does not occur in the joint portion 35 of the bonded honeycomb core 40. Further, since the hot-melt type adhesive 24 is cured at room temperature in a short time, the applied hot-melt type adhesive 24 hangs down or squeezes out on the surface of the honeycomb core 30 by pressure contact at the time of joining. Does not occur.

After the hot melt type adhesive 24 is hardened, the holding plates 6 of both clamp devices 5 are lifted to join the bonded honeycomb cores 40.
As shown in FIG. 3, a large-sized bonded honeycomb core 40 in which the joint portions 35, that is, the bonding portions are aligned in a substantially straight line is obtained by removing the honeycomb structure from the table 2.

It should be noted that the honeycomb core to be bonded by controlling the operation and stop of each device such as the clamp device 5, the adhesive supply device 21, the coating device main body 22 and the like in the honeycomb core bonding device 1 by the control mechanism. After arranging 30 on the table 2, for example, by turning on the start button, each device operates and stops according to a series of operation sequences, and the honeycomb core 30 can be automatically joined.

[Advantages of the Invention] As described in detail above, according to the method for joining honeycomb cores of the present invention, it is possible to apply a uniform adhesive to the joining end face portions of the honeycomb cores that are easily joined, and The work is extremely troublesome and does not require a temporary fixing work with a connecting tool that requires a lot of man-hours, and moreover, it is possible to perform highly accurate joining without causing a step or the like at the joint portion of the joined honeycomb cores. The working time can be significantly shortened, and in addition, the applied adhesive will not drip or squeeze out onto the honeycomb core surface due to pressure welding during splicing. Etc. are unnecessary, and excellent effects such as eliminating the problems that the conventional methods for joining honeycomb cores have are eliminated.

[Brief description of drawings]

FIG. 1 is a schematic view showing a state in which a honeycomb core is set in a honeycomb core joining apparatus for specifically carrying out the method for joining honeycomb cores according to the present invention, and FIG. 2 is a hot melt type adhesive on a joining end face portion. FIG. 3 is a perspective view of an essential part showing a state in which is applied, and FIG. 3 is a plan view of the essential part of the bonded honeycomb core. 1 ... Honeycomb core joining device 2 ... Table 4 ... Support shaft 5 ... Clamping device 8 ... Clamp moving mechanism 20 ... Hot melt type adhesive coating device 21 ... Adhesive supply device 22 ... Coating device main body 22a …… Nozzle 23 …… Adhesive supply hose 24 …… Hot melt type adhesive 30 …… Honeycomb core 31 …… Joint end face 32 …… Side face 34 …… Cut end 35 …… Seam 40… Joining Honeycomb core T ... Honeycomb core thickness

Claims (1)

[Claims] Claims: 1. Two honeycomb cores having at least both side surface portions and joint end surface portions are finished, the side surface portions of both honeycomb cores are aligned, and the joint end surface portions of the two honeycomb cores face each other at a predetermined interval. , And at least a portion of each honeycomb core in the vicinity of the joining end face portion is set in a pressure contact state with the table surface over the entire length in the longitudinal direction of the joining end face portion, and then the joining end face portion has its entire length. Apply hot-melt type adhesive by spraying with hot-melt type adhesive coating device, and after applying the adhesive,
At least one of the honeycomb cores is slid on the table while maintaining the set state on the table, and both honeycomb cores are joined so that both joint end surface portions are slightly pressed against each other, and the state is kept until the adhesive is hardened. A method of joining honeycomb cores, wherein the honeycomb cores are joined together by holding them.