JPS625915Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is used to make a circular pull hole in a fusuma core material such as cardboard or foamed synthetic resin.The core needle, cutter, and handle are protruded from the base, and a compass The purpose is to safely protect the core needle and cutter when not in use, eliminating danger, and when in use.
To provide a pull hole forming tool for a sliding door core material, which allows a core needle and a cutter to protrude from a base with a simple operation, and can accurately make a circular pull hole penetrating the front and back surfaces of the sliding door core material. It is in.

Conventionally, there has been no dedicated tool for making pull holes in fusuma core materials, and tools for making circular holes for carpets have generally been repurposed. However, the fusuma core material is thicker than the carpet, and the pull hole drilled in the fusuma core material is drilled through the front and back sides, and it is not possible to drill a satisfactory pull hole using a carpet tool. be. Incidentally, the structure of a carpet hole cutter has a long hole in the base, the lower part of the handle is screwed into the long hole with a nut, and a core needle is integrally provided with the handle and protrudes from the lower end of the handle. In addition, a cutter is fixed and protruded from the end of the base with a tightening bolt. If you want to use this tool for fusuma core material, you can simply replace it with a core needle or cutter that is compatible with the fusuma core material, but since the core needle is integrated with the handle as mentioned above, it is easy to use. The needles cannot be replaced, or they can be made to fit the fusuma core material depending on the structure described above, but the core needles are longer than those for carpets and are therefore more dangerous when not in use. There were problems such as bending easily.

This invention has been devised to solve the above-mentioned problems, and the invention will be explained below using examples. As shown in Figures 1 to 3,
A screw hole 2 is provided in the base 1, which has a rectangular plane, and is deviated from the center to one side and passes through the front and back sides.A handle 3 is screwed into the screw hole 2 from the front surface, and a core needle 4 is inserted into the handle 3. 3, and a cutter 5 is provided on the back surface of the base 1 to protrude from the inside of the base 1 so as to be freely retractable.

To explain this in more detail, the handle 3 has a body part hanging down from the hemispherical head, and a threaded part screwed into the screw hole 2 of the base 1 from the lower end of the body.
There is a hole 6 in the center that penetrates from the upper end to the lower end.
A chuck part 7 formed by several grooves is formed at the lower part of the hole 6, and a large diameter hole is formed in the hole 6. In a state in which the core needle 4 with the small diameter part protruding from the part is inserted and the large diameter part is engaged with the lowermost end of the large diameter part of the extraction hole 6, the small diameter part of the core needle 4 is inserted into the fusuma core material (not shown). )
The core needle 4 is formed in such a length that it protrudes from the back surface of the base 1 by a length corresponding to the thickness of the handle 3, and the core needle 4 is formed in such a length that the entire core needle 4 is buried within the handle 3. A tapered part 8 is formed in the lower part of the screw hole 2 of the base 1 into which the handle 3 is screwed, and the hole diameter becomes smaller as it reaches the back surface of the base 1. Tighten the chuck part 7 with
It is designed to hold pressure.

The cutter 5 is selectively attached to one of the longitudinal ends of the base 1, and since the core needle 4 is offset to one side from the center of the base 1 as described above, the cutter 5 can be attached to either the left or right end. The diameter of the handle hole formed by attaching 5 is different.
Therefore, the mounting structure of the cutter 5 is such that a cutter groove 9 is provided in the base 1 so that the cutter 5 can penetrate and engage with the cutter 5 on both the front and back sides, and a support shaft 10 is placed approximately in the vertical center of the cutter groove 9 in the longitudinal direction of the base 1. erected parallel to
A cutter 5 is rotatably supported on the support shaft 10, and a case portion 12 is provided at an end of the base 1 to protrude in a direction perpendicular to the longitudinal direction of the base 1. A groove 11a is provided continuously at the lower part of the cutter groove 9, and a groove 11b is also provided on the upper surface of the base 1, which is continuous at the upper part of the cutter groove 9, so that when the cutter 5 rotates, the cutting edge part of the cutter 5 is inserted into the case part 12. In addition, support walls 13, 13 are provided in the cutter groove 9 to face and abut the upper and lower parts of the cutter 5 when the cutter 5 is in an upright position. hold. Furthermore, a stopper 1 is inserted into the groove continuous to the upper part of the cutter groove 9 and thrust into the groove 9 from the end surface of the base 1 by the biasing force of a spring 14.
5 is provided to prevent the cutter 5 housed in the case portion from unexpectedly protruding from the inside of the case portion 12.

Incidentally, the support shaft 10 that supports the cutter 5 described above is
It is integrally provided at the tip of a threaded rod, and the cutter 5 can be replaced by screwing into the end face of the base 1 and removing the threaded rod.

The example shown in FIGS. 4 and 5 has a long hole 16 in the base 1.
The handle 3 passed through the elongated hole 16 is attached by tightening it with the seat plate 17 and the nut 18, and the cutter 5 is configured so that it can be attached only to one end of the base 1, and the handle 3 is attached as in the previous embodiment. The core needle 4 is held so as to be freely retractable, and a tapered portion 8 is formed in the screw hole 2 of the nut 18, and the mounting structure of the cutter 5 is also configured to fit within the case portion 12 as in the previous embodiment. It has been done. Then, by carving a scale 19 from the cutter 5 on the surface of the base 1 in parallel with the elongated hole 16 and fixing the handle 3 at an appropriate position in the elongated hole 16, it is possible to drill a handle hole of any size. It is equipped with adjustment devices where possible.

This invention has the above-described structure, and by rotating the upright cutter 5 toward the case portion 12 (clockwise rotation), the cutter 5 is moved toward the case portion 12.
While the cutter 5 is rotating, the stopper 15 is retracted, but at the same time as the cutter 5 is fitted into the case 12 and the pressing force of the stopper 15 is removed, the repulsive force of the spring 14 causes it to move back into the groove. Therefore, the cutter 5 is kept in the cutter groove 9. However, if the cutter 5 is rotated in a direction that causes the blade to protrude with a force stronger than the locking force of the stopper 15 acting on the opposite end of the cutter 5 due to the biasing force of the spring 14, the blade will return to its original upright state. protrudes from the base 1 and abuts on the support walls 13, 13, so even if the base 1 is rotated in the direction of cutting, the cutter 5 does not fall down and remains upright to cut the fusuma core material.

On the other hand, when the handle 3 of the core needle 4 is loosened from the base 1, the chuck portion 7 is loosened, and the core needle 4 can be freely housed in or protruded from the handle 3, and the handle 3 is tightened to the base 1. As a result, the chuck portion 7 is clamped and pressed by the tapered portion 8, so that the core needle 4 is maintained in the protruding or retracted state.

When making a handle hole in the core material of a fusuma, stick the core needle 4 into the center of the position where the handle hole should be made, hold the handle 3 and rotate the base 1 clockwise, the core material will be cut by the cutter 5 and the handle hole will be cut. It can be molded.

As described above, the pull hole forming tool for a fusuma core material according to this invention has a core needle fitted into the handle screwed onto the base so that it can come and go, and a chuck part provided on the handle and a taper part provided on the base. Therefore, the core needle is held under clamping pressure, and the core needle can be moved in and out and clamped by the tightening and loosening action of the handle on the base, making it easy to set and store the core needle. The cutter is held upright by a support wall in the cutter groove, and is rotated in the opposite direction to be housed in a case provided on the base, and a spring-loaded stopper holds the cutter housed in the case. Because of this, the cutter can be easily moved in and out, and the core needle can also be stored together with the cutter, so it can be safely stored away when not in use.The core needle is especially long and is made for use as a fusuma core material. However, since it can be stored inside the handle, there is no risk of it bending, and therefore the circular handle hole can be drilled accurately.

[Brief explanation of drawings]

The drawings show a pull hole forming tool for a fusuma core material according to this invention, FIG. 1 is a partially cutaway front view, FIG. 2 is a sectional view taken from FIG. A cutaway bottom view, FIG. 4 is a perspective view of a similar example,
FIG. 5 is a cross-sectional view taken along the line shown in FIG. 4. 1...Base, 2...Screw hole, 3...Handle, 4...
... core needle, 5 ... cutter, 6 ... punching hole, 7 ... chuck part, 8 ... taper part, 9 ... cutter groove, 10 ... spindle, 12 ... case part, 13 ...
Support wall, 14... spring, 15... stopper.

Claims (1)

[Scope of utility model registration request] A handle 3 is screwed into a screw hole 2 penetrating the front and back sides of the base plate 1, a punching hole 6 is formed in the handle 3, a core needle 4 is fitted into the punching hole so as to be able to come out and go, and a hole is inserted into the bottom of the screw hole on the back side. A chuck part 7 for holding the core needle under pressure is provided with a tapered part 8 formed to have a smaller diameter toward the base, and the cutter 5 is inserted into the cutter groove 9 provided on the side of the handle of the base. A case portion 12 is provided that is pivotally supported in a state that projects from the back surface of the cutter, and in which the cutter is rotated and housed in the base, and a support wall 13 that holds the cutter upright in the cutter groove 9.
and a stopper 15 that is retracted by a spring 14 to prevent the cutter housed in the case from escaping.