Pop-up card: Former Gifu City Public Hall
The current Gifu Civic Hall located in Mieji-cho, Gifu City, was built in 1967. Prior to that, the Gifu City Public Hall existed on the same site. This was the building.
The construction of this building was decided by the city council in 1921, but due to site problems, construction did not begin until 1927. Goichi Takeda was in charge of the design. The building was completed in April 1928, but the opening ceremony was held in August.
It had four meeting rooms, a basement, a hall, a guest room, and a large auditorium of approximately 600 square meters. The auditorium was equipped with an upper section for audience seating, which together could accommodate approximately 2,000 people.
I have created a pop-up card of the old public Hall.
[No.1] One sheet pattern
The first card I made.
Since the entrance is located high and the slope of the entrance is steep, I had to create a slope or the impression of the building would be different and the front door would seems too high.
Therefore, I created the slope as shown in the photo, as if it were three steps.
This is fine, but I thought it would be closer to the real building if I assembled the slope using separate parts, so I decided to make a pattern for that as well.
Since it is a slope, the part will be placed diagonally, but the slope will not be foldable if all the edges are fixed. The point C in the figure should move to the right as the other parts are folded.
[No.2] Use of separate parts (1)
This card was made with the idea that “point C" in the figure can be moved by fitting it into the slit.
Insert the arrow part into the slit so that it can move back and forth.
The small parts on the left and right are to make space for the parts to move when the cover paper is pasted on the back side.
It’s done. It seems to move good. Now I can upload the main site.
But then….
After looking at the photos for a while, I gradually began to think that the slits, which I thought were fine at first, were getting in the way.
It would be better without it.
So, this idea was rejected.
But I was so happy when the finished making that I had already uploaded the image to my instagram. (That’s why I couldn’t help mentioning it on this blog.)
[No.3] Use of separate parts (2)
This is the finished product that can slide without using a slit.
(I won’t write the specifics of how to do it here, since I won’t publish the pattern for this version.)
In the finished photo, both the ground and the slope are white, so we can’t see them well. So I chose this photo, lighting from the back.
When I tried to take a video of the opening and closing movement, I found a problem.
The force that pushes out the left and right slopes is transmitted as shown by the yellow arrows in the center. Because of the rather heavy movement of the parts, a repulsive force is added to the orange arrows, causing the left and right walls to distort. The slope does not move smoothly.
Now what should I do?
First, the shape of the backside was adjusted to reduce resistance when the parts move. Next, in the central part (in the part not visible in the photo), I reinforced it by increasing the connection with the ground.
Then, I reinforced the wall a little by connecting it at the point marked with a circle in the photo, and extended the front staircase forward by widening the steps a little to make it easier to fold.
Here is the completed photo.
There is also a video on the main site for your viewing. But I was a little disappointed that there was less movement than I had expected.
Finally, I felt that the adjustment of the connecting wall and the stairs was good for the movement of opening and closing the card, so I incorporated it into the one-sheet pattern. The pictures on the main site are the ones after the modification.
..I was tired after many productions, though.
This is the first update of the main site this year. Only the first one-sheet pattern is available to download. Please use it if you like.
[Link to the main site]
* Former Gifu City Public Hall