JPH0518092Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a machine for cutting wood and foam materials.

<Conventional technology> Traditionally, as one of the machines for cutting wood,
Scroll saws that utilize very fine saw blades are well known. Furthermore, a hot wire cutting machine that cuts foam materials using hot wire is also well known.

<Problems to be solved by the invention> However, a scroll saw for cutting wood cannot cut foam material cleanly, and a hot wire cutting machine cannot cut wood. As described above, cutting wood requires a scroll saw, and cutting foam requires a hot wire cutting machine, and there is no cutting machine that combines both functions.

<Means for solving the problems> This idea was developed in consideration of the problems mentioned above, and by replacing the saw blade and heat ray holding member of the scroll saw according to the purpose, it is possible to create a single machine. The purpose of this invention is to provide a cutting machine that can cut both wood and foam materials, and is constructed as follows.

A saw blade, an arm fixed to the upper surface of the main body, and an upper part of the saw blade removably held, and an upper mounting part provided on the arm and a lower part of the saw blade removably held. and a lower mounting part disposed on the main body side below the upper mounting part, a crank mechanism for driving the lower mounting part in the vertical direction, a heating wire, and a lower mounting part that is detachably held by the upper mounting part. It consists of a hot wire upper holding member, a hot wire lower holding member detachably held in the lower mounting part, and a mechanism for supplying electricity to the hot wire, and the electricity supply mechanism includes a step-down transformer and an output current of the step-down transformer. and an energizing path for supplying the hot wire to the hot wire.

<Example> This invention will be explained below based on the illustrated example.

Fig. 1 is a perspective view showing an embodiment of the wood and foam material cutting machine 1 with a saw blade 2 attached thereto, and Fig. 2 shows a state where a hot wire 5 is attached in place of the saw blade 2 in Fig. 1. FIG.

The wood and foam cutting machine 1 of this embodiment includes a crank mechanism 3 that moves the saw blade 2 up and down, and a hot wire 5 for safety that controls the voltage of the current flowing through the hot wire 5, for example, a nichrome wire.
There is a main body 7 equipped with a transformer 4 that reduces the voltage to about 6V, and the base end of an arm 10 having a substantially U-shaped cross section is disposed on the upper surface of the main body 7. Also,
A table 9 is mounted on the upper surface of the main body 7 via a support member 8.
are arranged horizontally. Approximately in the center of this table 9 is a hole 9 through which the saw blade 2 or the hot wire 5 is passed.
A is drilled. A lower mounting part 11 is provided between the main body 7 and the table 9 to which a lower part of the saw blade 2 or a lower part of the hot wire holding member 21 connected to the crank mechanism 3 of the main body 7 is attached. As shown in FIGS. 6 to 8, this lower mounting part 11 has a mounting part 21 for the lower part of the saw blade 2 or the lower part of the heating wire holding member 21.
A vertical groove 11a into which d is fitted is cut out to the center. The mounting portion 21 of the lower part of the saw blade 2 or the lower part of the heating wire holding member 21 is attached to this vertical groove 11a.
After fitting d, tighten the fastener 19 as shown in FIG.
The horizontal groove 11 is formed by cutting out the straight portion 19a at the tip of the vertical groove 11a to the center in a direction perpendicular to the vertical groove 11a.
The saw blade 2 or the hot wire lower holding member 21 is attached by tightening the threaded portion 19b provided at the rear of the fastener 19 in accordance with the angle b. In addition, a saw blade 2 is provided at a position facing the lower mounting portion 11 with the table 9 in between (the tip of the arm 10).
An upper mounting portion 12 is provided to which an upper or hot wire upper holding member 22 is mounted. This upper mounting part 1
2 has the same shape as the lower mounting portion 11 described above. A helical spring is provided inside the cylinder 10a above the upper mounting portion 12 in order to constantly pull the saw blade 2 or the hot wire 5 upward and maintain tension.

FIGS. 3 and 4 are diagrams showing the heating wire lower holding member 21. FIG. The heating wire lower holding member 21 is formed in a columnar shape, and includes an upper part 21a, a central part 21b, and a lower part 2.
It is formed from four parts: 1c and a mounting part 21d.

The upper part 21a is made of conductive metal,
A vertical hole 21e into which the hot wire 5 is inserted from the center of the top surface in a direction perpendicular to the top surface, and two screws 23 and 24 facing each other from the side toward the center of the cylinder are provided. One screw 23 is used to connect the cord 20 that transmits the current sent from the transformer 4, but it is also used to sandwich the hot wire 5 between its end face and the end face of the other screw 24. be done. Incidentally, the heating wire lower holding member can also be formed as shown in FIG. Upper part 31 of this heat ray holding member 31
A is provided with a vertical hole 31e similar to the previous embodiment and a screw 34 extending from the side toward the center of the cylinder. The configuration is such that the hot wire 5 is held between the end of the screw 34 and the side surface of the vertical hole 31e. moreover,
Connection can also be made by providing a hole 32 laterally from the side, attaching a banana plug or the like to the end of the cord 20 that transmits the current sent from the transformer 4, and inserting the banana plug into the hole 32. Furthermore, as yet another method of connecting hot wires, it is also possible to form them as shown in FIGS. 10 and 11. This heating wire lower holding member 41 has a first member 41a provided at the end of the heating wire 5 and having a hole, a hook portion and a hole for hooking into the hole of the first member 41a, and has a cord 20 from the transformer. a second member 41b to which is connected, a third member 41 having a vertical groove 43 and locking by inserting a screw 44 into a hole of the second member 41b;
It is formed from c. A mounting portion 42 is provided on the lower side of the third member 41c as in the previous embodiment. Note that at least the first member 41a and the second member 41c are made of conductive metal.

Central part 21 sandwiched between upper part 21a and lower part 21c
b is formed of an insulator 25 such as Bakelite or rubber.

The lower portion 21c is provided to protect the insulator 25 and to firmly fix the mounting portion 21d.

The mounting part 21d has a cylindrical shape, and one end thereof is connected to the lower part 2.
1c, is fitted into the vertical groove 11a of the lower mounting portion 11, and is tightened with a fastener 19 to be fixed to the lower mounting portion 11.
Further, a protrusion 21f may be provided on the lower side of the portion to be tightened by the fastener 19 to prevent slippage. Although the mounting portion 21d in this embodiment has a cylindrical shape, the entire mounting portion 21d may be formed into a flat plate shape, and furthermore, only the portion to be tightened with the fastener 19 may be formed into a flat plate shape. Alternatively, it may be formed integrally with the lower portion 21c.

Note that the upper heating wire holding member 22 can be the same as the lower heating wire holding member 21, and the arrangement is reversed.

Further, since the cord 20 connected to the hot wire upper holding member 22 becomes an obstacle when cutting the foam material, it is always provided through the inside of the arm 10. In addition, after the cord 20 is connected, it may be arranged along the outer peripheral surface of the arm 10.

Next, the mode of use of this invention will be explained.

(1) When cutting wood As with a general scroll saw, the upper and lower mounting parts 1
A saw blade 2 is attached to 2 and 11, a switch 3a on the front side of the main body 7 is turned on, a motor 3b of a crank mechanism 3 is driven, and the saw blade is moved up and down to cut wood.

(2) When cutting foam material Attach the hot wire holding members 22 and 21 holding the hot wire 5 to the upper and lower mounting parts 12 and 11, connect the cords 20 to each, and turn the switch 3 of the crank mechanism 3 on.
A switch 4a provided separately from switch a is turned on to energize the hot wire 5 through the transformer 4. When a current flows through the hot wire 5, it generates heat due to resistance heat. Then, the foamed material is placed on the table 9 and pressed against the hot wire 5 to be cut.

Although this invention has been described above with reference to the illustrated embodiments, this invention is not limited to only what is shown in the examples, and design changes within the scope of this invention are within the technical scope. It is included.

<Effects of the invention> As explained above, according to the wood and foam cutting machine of this invention, the hot wire holding member for holding the hot wire is detachably configured in the saw blade attachment part of the scroll saw. With a single cutting machine, you can cut both wood and foam materials by simply switching the switch and replacing the saw blade and heat wire holding member.

[Brief explanation of the drawing]

Figures 1 to 11 are diagrams showing an embodiment of the wood and foam cutting machine of this invention. Figure 1 is a perspective view with a saw blade attached, and Figure 2 is a perspective view with a hot wire attached. FIG. 3 is a perspective view of the heating wire lower holding member, FIG. 4 is a cross-sectional view of FIG. 3, and FIG.
The figure is a sectional view of another heat ray retaining member, FIG. 6 is a perspective view of the lower mounting part, FIG. 7 is a front view, FIG. 8 is a side view, and FIG. 9 is a plan view of the fastener. 10th
Figure 11 is a perspective view showing another way to attach the hot wire.
The figure is a - sectional view of FIG. 10. 1... Wood and foam cutting machine, 2... Saw blade,
3...Crank mechanism, 4...Step-down transformer, 5...
...Heat wire, 7...Main body, 10...Arm, 11...
Lower mounting part, 12... Upper mounting part, 20... Cord (part of the current carrying path), 21... Lower heating wire holding member,
22...Hot wire upper holding member.

Claims (1)

[Utility Model Claim] A wood and foam cutting machine comprising: a saw blade, an arm fixed to the top surface of a main body, an upper mounting portion disposed on the arm and removably holding an upper portion of the saw blade, a lower mounting portion disposed on the main body below the upper mounting portion and removably holding a lower portion of the saw blade, a crank mechanism for driving the lower mounting portion in an up and down direction, a heating wire, an upper heating wire holding member removably held on the upper mounting portion, a lower heating wire holding member removably held on the lower mounting portion, and a mechanism for applying electricity to the heating wire, wherein the electricity-carrying mechanism is configured to have a step-down transformer and an electricity-carrying path for supplying the output current of the step-down transformer to the heating wire.