JPH10296702A - Fret saw machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily attach and detach a fret saw blade to and from a lower blade-holding part of a fret saw machine. SOLUTION: A lower blade-holding part 16 is provided on an upper face of a housing 12, and an upper blade-holding part 18 is provided above the lower blade-holding part 16. Both ends of a fret saw blade 15 are detachably held and supported by the upper and lower blade-holding parts 18, 16. It is so designed that a workpiece to be machined is sawed and machined by reciprocatingly moving the fret saw blade 15 up and down by a driving mechanism 14. A side wall 27 is formed inside the housing 12 on its one side, and a space 28 for attaching and detaching the blade is defined by this side wall 27. According to this structure, a work region under a table 13 can be secured with the aid of the attaching and detaching space 28 and, as a result, the fret saw blade 15 can be easily attached to and detached from the lower blade- holding part 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thread saw used for sawing a workpiece such as a wooden board.

[0002]

2. Description of the Related Art In a thread saw of this type, a lower clamping portion is provided on a housing, and an upper clamping portion is provided above the lower clamping portion via an arm. Both ends of the thread saw blade are detachably clamped and supported by the upper and lower clamping portions. A table is arranged between the upper and lower clamping parts,
The thread saw blade penetrates this table. And
The driving mechanism causes the thread saw blade to reciprocate up and down, so that the workpiece placed on the table is sawed.

[0003]

However, in the conventional thread sawing machine, the distance between the table and the housing is very small because the table is disposed close to and above the lower holding portion. Accordingly, it is difficult to perform the work of attaching and detaching the thread saw blade to and from the lower holding portion while putting a hand between the table and the housing.

An object of the present invention is to easily attach / detach a thread saw blade to / from a lower holding portion.

[0005]

According to the first aspect of the present invention, a lower holding portion is provided on an upper portion of a housing.
An upper clamping section is provided above the lower clamping section, and both ends of the thread saw blade are detachably clamped and supported on the upper and lower clamping sections, and the driving mechanism reciprocates the thread saw blade to saw the workpiece. In the yarn saw machine designed to perform a drawing process, the housing is provided with a detachable space for attaching and detaching the yarn saw blade from the lower holding portion, and the detachable space is formed by cutting out at least one of both sides of the housing. The gist is that it is configured by:

According to a second aspect of the present invention, in the first aspect, an operating portion for driving or stopping a driving mechanism is provided in the attaching / detaching space.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, a yarn sawing machine 10 according to this embodiment includes a base 11, a synthetic resin housing 12 mounted on the base 11, and a table 1 disposed on the housing 12.
3 is provided. A step 12a is formed from near the center of the housing 12 to the front end thereof.
A gap is formed between a and the table 13.

A drive mechanism 14 is accommodated in the housing 12, and the drive mechanism 14 is provided with a lower holding portion 16 for holding and supporting the lower end of the thread saw blade 15. The lower holding portion 16 protrudes upward from the bottom surface of the step 12a. A thumbscrew 16a is provided on one side of the lower holding portion 16, and by moving the thumbscrew 16a forward and backward,
The lower end of the thread saw blade 15 can be pinched or released.

An arm 17 stands on the base 11, and the tip of the arm 17 extends above the table 13. An upper clamping portion 18 for clamping and supporting the upper end of the thread saw blade 15 is provided at the tip of the arm 17.
A rotatable operation knob 18a is provided on the side of the upper holding portion 18.
The operation knob 18a is urged to rotate in the direction in which the thread saw blade 15 is clamped by a spring (not shown).
By rotating the operation knob 18a, the upper end of the thread saw blade 15 can be pinched or released. As a result, the thread saw blade 15 is set vertically between the upper and lower clamping portions 16 and 18. Then, the thread saw blade 15 is reciprocated by the drive mechanism 14, and the workpiece 19 such as a plate material placed on the table 13 is sawed.

A groove 20 is formed on the rear upper surface of the housing 12.
Are formed. The groove 20 extends in the width direction of the housing 12, and a part of the groove 20 projects rearward from the position of the rear edge of the table 13.

A notch 22 is formed on one side of the front part of the housing 12 and is located below the bottom surface of the step 12a. The notch 22 includes upper and lower bottom walls 23 and 24 and each bottom wall 2.
Upper and lower rear wall portions 25 erected from the rear end edges of 3, 24,
26, and a side wall 27 orthogonal to each of the rear walls 25, 26. By being surrounded by these walls 23 to 27, a detachable space 28 for attaching and detaching the thread saw blade 15 from the lower holding portion 16 is formed. The drive mechanism 14 is turned on / off at the lower rear wall 25 of the notch 22.
An operation switch (operation unit) 29 for performing an OFF operation is provided. Therefore, the operation switch 29 is disposed in the attachment / detachment space 28.

Next, a description will be given of a method of mounting the thread saw blade 15 in the thread saw machine configured as described above. In a state where the thread saw blade 15 is not mounted on the upper and lower clamping portions 16 and 18, the thread saw blade 15 is made to penetrate the table 13 from above and the lower end thereof is inserted into the lower clamping portion 16. Then, the lower end of the thread saw blade 15 is clamped by tightening the thumb screw 16a. When clamping the lower end of the thread saw blade 15,
The worker inserts his hand between the step 12a of the housing 12 and the table 13 to tighten the thumbscrew 16a, but a sufficient working area is secured by the attachment / detachment space 28. Thereafter, the upper end of the thread saw blade 15 is inserted into the upper clamping portion 18 and the upper end of the thread saw blade 15 is clamped by rotating the operation knob 18a. When the thread saw blade 15 is detached from the upper and lower clamping portions 16 and 18, the operation is performed in the reverse order to that described above.

Next, effects that can be found from the present embodiment will be described below.・ Because the mounting space 28 is provided in the housing 12,
A wide working area for attaching and detaching the thread saw blade 15 can be secured below the table 13. Therefore,
The lower end of the thread saw blade 15 can be quickly and easily attached to and detached from the lower holding portion 16.

Since the notch 22 is integrally formed on one side of the housing 12 to form the attachment / detachment space 28, unnecessary assembly can be omitted. Therefore, the manufacturing cost of the thread saw 10 can be reduced.

Since the operation switch 29 does not protrude outside the outer surface of the housing 12, it is possible to prevent a part of the body of the worker from accidentally coming into contact with the operation switch 29.

Since the groove 20 is provided at the rear of the housing 12, the rigidity of the housing 12 can be increased. In addition, since cutting chips generated when the workpiece 19 is sawed by the saw blade 15 can be discharged into the groove 20 formed in the rear portion of the housing 12, the cutting chips are disposed behind the yarn sawing machine 10. Difficult to scatter. At the same time, the cutting chips moving to the rear of the thread sawing machine 10 can be collected in one place, so that the cutting chips can be easily collected.

Further, when carrying the yarn sawing machine 10, etc., small items such as scales can be temporarily stored in the grooves 20. The above embodiment may be configured as follows.

The mounting / removal space 28 is provided on one side of the housing 12 and on the other side or on both sides. In particular, if it is provided on both sides, the thread saw machine 10 can be made visually compact.

In addition to arranging the operation switch 29 on the lower rear wall 25 of the cutout 22, the upper and lower bottom walls 23, 24
Or, it is arranged on the upper rear wall 26. Next, technical ideas other than the claims that can be grasped from the embodiment will be described together with their effects.

[0020] The thread saw according to claim 1 or 2, wherein a recess is provided in an upper portion of the housing. According to this configuration, the rigidity of the upper portion of the housing can be increased.

[0021]

The present invention is configured as described above, and has the following effects. According to the first aspect of the present invention, a wide working area can be secured below the table by the attaching / detaching space, so that the thread saw blade can be easily attached / detached to / from the lower holding portion.

According to the second aspect of the present invention, since the operating portion does not protrude beyond the side surface of the housing, it is possible to prevent inadvertent contact with the operating portion.

[Brief description of the drawings]

FIG. 1 is a front view of a yarn sawing machine showing an embodiment.

FIG. 2 is a side view of the thread sawing machine.

FIG. 3 is a perspective view of a thread saw.

[Explanation of symbols]

12 ... housing, 14 ... drive mechanism, 15 ... thread saw blade, 1
6: Lower clamping portion, 18: Upper clamping portion, 19: Workpiece,
28 ... Removable space, operation unit (operation switch)

Claims (2)

[Claims] An upper holding portion is provided above an upper portion of a housing, an upper holding portion is provided above the lower holding portion, and both ends of a thread saw blade are detachably held on both upper and lower holding portions. In a thread sawing machine in which a thread saw blade is reciprocated by a driving mechanism so as to saw a workpiece, the housing is provided with a detachable space for attaching and detaching the thread saw blade from a lower clamping portion. A thread sawing machine in which a mounting / dismounting space is formed by cutting at least one of both sides of a housing. 2. The thread saw according to claim 1, wherein an operation section for driving or stopping a drive mechanism is provided in the attachment / detachment space.