JPS6036922B2 - Method and device for forming fan backbone - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for forming the backbone of a fan into a predetermined shape from a rectangular strip-shaped board material made of bamboo, which is part of the fan manufacturing process, and a method that can be used directly to implement this method. This relates to a device for

The production of folding fans in Juchao requires an extremely complex process, and most of these processes are done by hand using special skills based on the intuition of the craftsman, making it a traditional handicraft.

In manufacturing this fan, first the fan frame is made from bamboo material, but in this case, as shown in Figure 1,
In particular, the backbone 1 of a fan, apart from special fans such as tea ceremony fans and dancing fans, is tapered with a thin camellia from the chest 2 to the edge part 2, which borders the stepped waste part 3. The tip part 4, which is the part to which the base paper is pasted, is formed as an extension, and a key hole 6 is provided near the head part 5 at the tip of the Tsukioka part 2.
It is made into a shape with . According to the conventional traditional technique, the backbone 1 is formed by first making a plate material 1' made of bamboo material into a rectangular strip shape of a predetermined size, as shown in FIG. 1', as shown in Fig. 2B, a key hole 6 is first drilled at a predetermined location called "memomi", and then this plate material 1' is drilled. After inserting a stick-like skewer into the hanging key hole 6 and arranging several hundred sheets so that they are stacked one on top of the other, the surrounding area shown by hatching in Figure 2C is called ``Nakatsuke''. The parts are gradually scraped off by hand with a knife or chisel to shape them into the planned outline shape. It is important to arrange the pieces into the same shape, and this is done by numbers, and is an extremely difficult task that requires labor and a high degree of technical skill. Therefore, with regard to the process of forming the backbone of a fan called ``Nakatsuke'', there has been a desire for an alternative, simpler and more efficient forming method. It has been considered and actually attempted to stamp out the entire contour shape from the plate material 1' at once using a cutting die that corresponds to the entire planned contour shape from the thorax 2 to the tip 4 of the bone 1. However, this has proven to be unsuccessful and cannot be implemented.

This is because it is extremely difficult to accurately make a long and thin cutting die that corresponds to the entire contour shape of the backbone, and because the board material 1' is made of bamboo, it is difficult to make each board material 1'. There is a certain degree of non-uniformity in the direction of the grain of bamboo fibers oriented in the length direction, and there is inevitably a certain degree of variation in quality such as distortion and twisting, so it is difficult to cut the entire contour with a cutting die. When punching and forming all at once,
Unexpected cracks or breaks occur in the tip part 4, which is formed to the width of the pongee, which is an important part for pasting the base paper, and the product is not formed accurately to the planned shape, resulting in most molded products being defective. It is. In view of the above-mentioned circumstances, the present invention was made with the aim of making it possible to form the backbone of a fan using a punching method without any problems, and was successful as a result of various experiments, and the method is described below. will now be described with reference to FIG. 3, and an apparatus for carrying out the method with reference to FIGS. 4 to 6, respectively.

According to the method of the present invention, when forming the bamboo plate material 1' shown in FIG. Rather than drilling key holes or punching out the entire contour at once as previously attempted, the forming process is carried out in two stages. Then, only the part corresponding to approximately half of the length of the material, which includes forming the planned shape of the outline other than the tip and forming the key hole, is performed in one punching process to obtain an intermediate molded product. In the second step, the remaining tip is shaped into the desired narrow width. That is, as a first step,
For the bamboo rectangular board material 1' shown in Fig. 3A,
As shown in FIG. 3B, the tip forming portion 4' is left as it is without any molding, and the rest of the shoulder portion 3 is formed in stages, and the section from the body portion 2 to the head portion 5 is formed. Forming the outline shape and forming the key hole 6, which is approximately half of the length of the material, is performed simultaneously in a single punching process, and the hatched portion is removed at once. However, as a result of this first stage punching process, only the tip forming portion 4' remains the same width as the original plate material 1', and only the narrow width forming of the tip has not yet been completed. In this way, an intermediate molded product 1'' as shown in FIG. 3C is obtained, in which all other molding has been completed.

Then, as a second step, the intermediate molded product 1'' obtained by the -degree punching process in the first step is subjected to a tip forming portion 4 shown with hatching in FIG. 3C. After removing both sides of the ridge 4, the remaining tip 4 is shaped into a predetermined pongee width, thereby obtaining a molded product of the backbone 1 having the planned shape shown in FIG.

Here, the second stage of forming the tip part may be done by punching in the same way as the first stage of shaping, or it may be done manually by scraping it off with a knife or chisel as in the traditional technique. You can go there. In addition, in the above method, during the first step of punching, the contour shape of the shoulder portion 3 is formed, and a paragraph 7 is inevitably formed in that portion, and this paragraph 7 is formed at the planned tip of the shoulder portion 3. It is formed as a constricted part of an appropriate length according to the thickness of the shape of part 4, and this paragraph 7
This facilitates the formation of the tip portion in the second step.

Next, as shown in FIGS. 4 to 6, the device for performing the first stage punching process in the above method includes a male die (punch) 10 and a corresponding female die to which this punch fits. It is configured as a punching device equipped with a mold (dice) 20.

In this device, the male mold 10 has a planar shape corresponding to the planned contour shape from the vicinity of the intermediate shoulder 3 of the backbone 1 of the fan to be formed to the entire 8-side portion 2 and the head portion 5. Ru. On the other hand, the female mold 20 has a mold hole 21 that corresponds to the shape of the male mold 10 and allows it to be inserted into a compatible state. The male mold 10 and the female mold 20 are arranged, for example, one above the other, and the male mold 10 is dropped into the mold hole 21 of the stationary female mold 20 from above by power using compressed air or the like and is pressed into a locked state. It is considered as something to be gained.

The mold hole 21 of the female mold 20 is formed to an appropriate depth, and the mold hole 21
A hard elastic material 22 such as hard artificial rubber is buried inside the mold, and a male mold receiving part 23 made of the same type of rigid material as the male mold I0 and the female mold 20 is laid on top of the elastic material 22. It is considered to be iron-plated.

Here, the upper surface level of the male mold receiving part village 23 is assumed to be approximately aligned with the upper surface level of the female mold 20 under normal conditions. Further, a key hole forming punch 24 is provided at a position corresponding to the key hole 6 of the backbone 1 of the fan to be formed in the mold hole 21 of the female die 20. The punch 24 is fixed to the bottom of the mold cavity 21 at the lower part, and extends slidably through the elastic member 22 and the male mold receiving part village 23, and the punch 24 The level of the upper tip of is female type 2
It is assumed that the level corresponds to the top surface level of 0. Corresponding to the punch 24, an insertion hole 11 forming a die into which the upper tip of the punch 24 is inserted is provided on the lower surface side of the male mold 10. However, according to the lever device, the female type 20
If one end of the plate material 1' is placed again on the mold hole 21 and the male mold 10 is dropped and pressed from above so as to fit the iron into the mold hole 21, the pressing force will cause the mold to form as shown in FIG. The elastic material 23 is slightly compressed so that the male receiving member 2
3 floats into the mold hole 21, and the plate material 1
' is sandwiched between the male mold receiving member 23 and the male mold 10, and is press-fitted into the mold hole 21 by about the thickness of the plate material 1', whereby the male mold 10 and the female mold 20 mold holes 21
By cutting the buttocks, a contoured shape can be punched out according to the shape.

Also, at the time of punching, at the same time, the male mold receiving part village 23
As the punch 24 sinks into the mold hole 21, the upper tip of the punch 24 becomes relatively upwardly protruded from the male die receiving member 23. Punch out the material 1' and insert the male die 10 into the insertion hole 11.
This means that a key hole is punched out. In addition, 25 in Figure 4
, 26 are members for contacting and positioning the plate material 1' when placing the plate material 1' on the female mold 20,
Reference numeral 27 denotes a material receiving member for supporting the other end of the reloaded plate material 1' corresponding to the tip forming portion.

In the configuration described above, the method of the present invention has the following advantages.

1 The forming process of the backbone 1 from the plate material 1' is carried out in two stages, and in the first stage, the forming process except for the forming of the tip part is performed in one punching process, and the intermediate forming process is performed. Product 1'' is obtained, and in the next second step, the remaining tip of the intermediate product r is formed into a thin shape. Even if there are variations in quality such as distortion or distortion, there is no risk of cracks or missing parts in the part that will become the tip during the first stage of punching and forming, and most of the forming except for the tip can be done easily and neatly as planned. It can be done accurately, and in the next second step, forming the pongee width of the tip, it can be easily done by punching, manually, or any other method without the risk of cracking or chipping.

2 In the first stage of punching, the step forming of the contour of the shoulder portion 3 and the contour forming of the trunk portion 2 to the head portion 5 are simultaneously performed, and the formation of the key hole 6 is performed at the same time, so the contour is always The key hole 6 is formed at an accurate position relative to the shape.

3. Since the first stage of punching is performed excluding the tip, the cutting die used only needs to be as short as half of the total length of the backbone. This makes it easy to improve the accuracy of the cutting die, which eliminates defects. This greatly contributes to the realization of extremely accurate and clean punching without any formation.

Further, according to the apparatus of the present invention, the punch 24 for forming the female type 2-hole keyhole is provided, and the insertion hole 1 of the punch 24 is
By providing 1 male type and 1 male type, 10 male types and 20 female types are provided.
1. When punching out the outline of a part other than the tip of the backbone, it has the feature of making it possible to smoothly punch out a key hole in an accurate position at the same time without any hindrance to the shaping. .

Generally speaking, the present invention provides an alternative to the traditional traditional method of forming the backbone of a fan from a rectangular strip-shaped board material by hand, which is called ``Nakatsuke''. For the first time, it has become possible to use the punching method, which was previously impossible, without any problems, and it has tremendous benefits in making fan manufacturing easier and more efficient.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the shape of the backbone of a fan, Figures 2 A to C
are explanatory diagrams showing the steps of the conventional backbone molding method, and Figures 3A-
C is an explanatory diagram showing the steps of the backbone molding method according to the present invention, FIG. 4 is a perspective view showing an embodiment of the molding device according to the present invention, FIG. 5 is a side sectional view of the molding device, and FIG. 6 FIG. 2 is a side sectional view of the forming apparatus during punching operation. DESCRIPTION OF SYMBOLS 1... Back bone, 1'... Plate material, 1''... Intermediate molded product, 2... Chest, 3... Shoulder part, 4... Tip part, 4
'... Part for forming the tip of the ear, 5... Head part, 6...
・Keyhole, 7...Paragraph, 10...Male die, 11...Insertion hole, 20...Female die, 21...Mold hole, 22...Elastic material, 23...Male die holder Part 24... Punch. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. A tip portion 4 narrower than the body portion 2 is extended from the body portion 2 to the shoulder portion 3, and a locking hole 6 is provided near the head portion 5 at the tip of the body portion 2. Fan rib 1 having a shape of
When forming from rectangular strip-shaped bamboo board material 1',
First, except for forming the tip, only the forming of the constriction of the shoulder section 3, the shape forming from the body section 2 to the head section 5, and the formation of the key hole 6 are performed simultaneously in one punching process. A method for forming a backbone of a fan, characterized in that after this punching process, the remaining tip part 4 is formed into a narrow width. 2. A male die 10 having a planar shape corresponding to the contour shape from the vicinity of the intermediate shoulder 3 of the fan backbone 1 to the entire trunk 2 and head portion 5 to be formed; Consisting of a punching device equipped with a matching female die 20,
The female die 20 is provided with a key hole forming punch 24 at a position corresponding to the key hole 6 of the fan backbone 1 to be formed, and the insertion hole 11 of the punch 24 is provided in the male die 10. Features: A device for shaping the backbone of a fan.