JPH01272401A - Cutting device - Google Patents

Abstract

PURPOSE:To obtain the title device capable of extending the life of a saw blade and achieving the reduction of vibration while enhancing usability by setting off the cutting resistances, by using an endless type saw blade and allowing two track parts of the saw blade to approach each other in an almost mutually overlapped state by a guide means. CONSTITUTION:When a housing 10 is grasped and a switch 17 is turned ON, a motor 12 is rotated in a definite direction and the rotation thereof is transmitted to a drive pulley 1 through a gear box 13. Since a saw blade 3 is of endless type, when the pulley 1 is rotated in a fixed direction, both track parts 3a, 3b of the saw blade 3 run in directions reverse to each other as shown by arrows (a), (b) and, therefore, the cutting reaction forces in the running direction of the saw blade 3 are set off and the total length of the saw blade 3 can be effectively used in cutting and the life thereof becomes long and the generation of vibration due to reciprocating movement is eliminated and cutting operation is performed without feeling tired.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cutting device for cutting frozen foods, tree twigs, etc.

[Conventional technology]

Conventionally, various cutting devices with two saw blades stacked on top of each other are commercially available. All of them are reciprocating type, with two overlapping saw blades that reciprocate in opposite directions.
Since the two saw blades are driven in opposite directions, the cutting reaction force in the saw blade movement direction is canceled out, and there is no need to support the cutting reaction force by hand, resulting in good usability.

[Problem to be solved by the invention]

However, if the thickness of the saw blade is not increased during pushing operation,
The saw blade may buckle. Therefore, the overlapping thickness of the two saw blades becomes thicker, a greater driving force is required, and the amount of material turned into chips increases.

Moreover, since it is a reciprocating type, both ends of the saw blade are not used for cutting, but only the central part is used, which has the disadvantage of short life. Furthermore, since it is a reciprocating type, vibrations occur and the cutting operation becomes tiring.

An object of the present invention is to provide a cutting device that can reduce the thickness of the saw blade, increase the life of the saw blade, and reduce vibration while improving usability by offsetting cutting resistance.

[Means to solve the problem]

The cutting device of the present invention uses an endless saw blade, and uses guide means to bring two track portions of the saw blade close to each other in a substantially overlapping state.

[Effect]

According to the configuration of the present invention, since an endless saw blade is used, when the saw blade is driven in a fixed direction, both track portions move in opposite directions. Therefore, cutting can be performed only by pulling, and the cutting reaction force is offset.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 to 3. An endless saw blade 3 is hung between a driving pulley 1 and a driven pulley 2. A pair of idle pulleys 4.5 serving as guide means are provided near both pulleys 1.2, and both orbital portions 3a of the saw blade 3.

3b are brought close to each other in a substantially book-shaped state.

As shown in FIG. 2, the drive boo U 1 and the idle pulley 4 are attached to the drive side support plate 7 of the main body 6, and the driven pulley 2 and the idle pulley 5 are attached to the driven side support plate 8. The main body 6 consists of a main body plate 9 on which the driving side support plate 7 is provided, a housing 10, and an arm 11, and the driven side support plate 8 is fixed to the tip of the arm 11.

A motor 12 and a gear box 13 are housed in the housing 10, and the output shaft of the gear box 13 serves as the rotation shaft of the drive pulley 1. Arm 11 is y! The male threaded portion 11a at the E end is telescopically inserted into the guide hole of the main body plate 9. A tension adjusting nut 14 loosely fitted into a notch 15 of the main body plate 9 is screwed into the male threaded portion 11a. A set screw 16 is screwed into the main body plate 9. 17 is a switch for the motor 12.

Explain the operation. Grasp housing 10 and switch 1
7 is turned on, the motor 12 rotates in a fixed direction, and the rotation is transmitted to the drive pulley 1 via the gear box 13. Since the saw blade 3 is endless, when the drive pulley 1 rotates in a fixed direction, both track sections 3a and 3b run in opposite directions as shown by arrows a and b in FIGS. 1 and 3.

Therefore, the cutting reaction force in the saw blade traveling direction is canceled out.

Adjustment of the tension with respect to the extension of the saw blade 3 is performed by rotating the tension adjustment nut 14 to extend and retract the arm 11 from the main body plate 9.

The arm 11 is fixed with a set screw 16 at an appropriate length.

This cutting device has good usability because the cutting reaction force is canceled out as described above, so there is no need to support the cutting reaction force by hand.

Moreover, since the endless saw blade 3 is used, unlike the saw blade 3 that moves reciprocatingly, cutting can be performed only by pulling. Therefore, the saw blade 3 can be made thinner. Therefore, the waste of driving force is reduced, and the amount of cut material that becomes chips is reduced, resulting in less waste of the cut material. Further, since the endless saw blade 3 is used, the entire length of the saw blade 3 can be effectively used for cutting, and the life of the saw blade 3 is extended. Moreover, there is no vibration caused by reciprocating motion, so cutting operations are not tiring.

FIG. 4 shows another embodiment of the invention. In this example, the pair of idler pulleys 5 on the side of the driven boob U2 are shifted by ΔX in the saw blade running direction. The same goes for the drive boob IJl side.

With this configuration, even if the saw blade 3 is made endless at the joint portion 3C by overlapping welding or the like, the thick joint portion 3C can pass between the pair of idle pulleys 5 without any problem. Therefore, even if the joint portion 3c is welded, it is not necessary to provide a gap between the two track portions 3a and 3b, which is convenient for use. Other structural effects are the same as in the first embodiment.

FIG. 5 shows yet another embodiment, in which a blade guide 18 is provided which covers the back of the pair of track portions 3a, 3b of the saw blade 3. The blade guide 18 is fixed at both ends to the drive side support plate 7 and the driven side support plate 8 shown in FIG. 2, or to the arm 11.

With this configuration, even if the saw blade 3 is thin and weak, it is supported by the blade guide 18, so the saw blade 3
is prevented from tilting. Therefore, the saw blade 3 can be made even thinner.

In the embodiment described above, the idler pulley 4.5 was used as a guide means for guiding the saw blades 3 in an overlapping state, but a sliding member may also be used.

〔Effect of the invention〕

Since the cutting device of the present invention uses an endless saw blade, it can cut only by pulling, unlike a saw blade that moves reciprocally. Therefore, the saw blade can be made thinner, reducing wasted driving force, and reduces the amount of cut material that becomes chips, reducing wasted material. Furthermore, since an endless saw blade is used, by driving in a fixed direction, both orbital portions of the saw blade move in opposite directions, and the cutting reaction forces cancel each other out. Therefore, it is not necessary to receive the cutting reaction force by hand, and it is easy to use. Furthermore, since an endless saw blade is used, the entire length of the saw blade can be used effectively for cutting, resulting in a longer life of the saw blade. In addition, there is no vibration caused by reciprocating motion, and the cutting operation is less tiring.

[Brief explanation of the drawing]

FIG. 1 is a bottom view of one embodiment of the invention, FIG. 2 is a front view thereof, FIG. 3 is a partial perspective view of the saw blade, and FIG. 4 is a partial bottom view of another embodiment of the invention. FIG. 5 is a partial perspective view of still another embodiment of the present invention. l... Drive pulley, 2... Driven pulley, 3... Saw blade, 3a, 3b... Track portion, 4, 5... Idle pulley serving as guide means, 6... Main body, 12 ...Motor Jt) Figure 3 Figure 4 ff1s diagram

Claims (1)

[Claims] An endless saw blade is hung between the driving pulley and the driven pulley,
A cutting device provided with a guide means for bringing the two orbital portions of the saw blade between the two pulleys close to each other in a substantially overlapping state.