JPS6322012Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cutting back force measuring device for a vertical bandsaw machine.

Generally, in vertical band saw machines, in order to protect the band saw blade and perform accurate and safe work, the cutting back force applied to the band saw blade is measured and the material feeding speed is adjusted to prevent excessive force on the band saw blade. I try not to apply any load. As a means for measuring the cutting force of a band saw blade in a vertical band saw machine, for example, a measuring device such as a dial gauge is held in a frame via a holder such as a magnetic stand, and the measurement is carried out. There is also a method in which the load acting on the bandsaw blade is detected by a hydraulic device, and the detected value is displayed on a pressure gauge for measurement. However, in the former type, which uses a measuring device such as a dial gauge, the measuring device is easily damaged by adhesion of cutting oil or cutting chips, or by external force, and it is difficult to remove the measuring device once. After that, when reinstalling and taking measurements, it is extremely difficult to set the conditions to the same conditions as the first measurement, which causes measurement errors. The latter type has the problem of complicated piping and high costs.

The present invention was devised in view of the above-mentioned problems, and its purpose is to simultaneously and easily perform the setting and zero point adjustment of a measuring device for measuring the cutting back force of a bandsaw blade. In addition to being able to measure cutting force over a wide range,
Furthermore, it is an object of the present invention to provide a cutting back force measuring device for a vertical bandsaw machine that can be protected from cutting oil, cutting debris, and external forces.

Embodiments of the present invention will be described in detail below with reference to the drawings.

Fig. 1 shows a cutting force measuring device 1 according to the present invention.
This figure shows a schematic front view of a vertical band saw machine 3 equipped with a lower frame 5 and an upper frame 7. A workbench 9 equipped with a rotary table is mounted on the lower frame 5 so as to be movable back and forth and left and right.
operated by. Furthermore, a drive wheel 13 is rotatably provided within the lower frame 5, and this drive wheel 13 is rotationally driven by a motor (not shown). A driven wheel 15 is rotatably provided in the upper frame 7, and between the driven wheel 15 and the drive wheel 13,
A loop-shaped band saw blade 17 is wound around. Furthermore, a cutting back force measuring device 1 is provided at the lower part of the upper frame 7, and the band saw blade 17 is guided by a band saw blade guide 19 of the cutting back force measuring device 1.

As shown in FIGS. 2 to 8, the cutting back force measuring device 1 has a base body 21 attached to the lower part of the upper frame 7.
The roller body 23 is attached to the hinge pin 2 at the front of the
5 so as to be swingable. A pair of guide rollers 27 constituting a guide 19 for guiding the band saw blade 17 are rotatably provided on the roller body 23 via a bearing 31 on a support shaft 29 fixed to the roller body 23. One of the guide rollers 27 is formed with a flange portion 27a that guides the back of the band saw blade 17.

With the above configuration, the band saw blade 17 is held between both sides by the guide rollers 27, and its back portion is supported by the flange portion 27a of the guide roller 27 while traveling.

The roller body 23 is the roller body 2
Spring receiving part 33 and base body 21 provided on the 3 side
It is urged forward by a spring 37 interposed between it and a spring receiver 35 provided on the side. The spring receiver 35 on the base body 21 side is slidably inserted into a through hole 39 formed in the base body 21, and is supported by a spring force adjustment screw 41. The spring force adjustment screw 41 is fitted into a through hole 39 provided in the base body 21, and is screwed into a support member 43 fixed by a set screw or the like so as to be freely forward and backward. A scale plate 45 displaying a force measurement scale and a handle locking portion 47 are provided.

With the above configuration, the urging force of the spring 37 can be changed by adjusting the spring force adjusting screw 41.

Furthermore, an arm portion 23a is formed at the rear of the roller body 23, and has a pin 53 screwed thereon that can contact a measuring point 51 of a measuring device 49, which will be described later. A stopper 55 is provided to prevent rocking.

A measuring instrument case 57 is integrally provided on the side of the base body 21, and a measuring instrument 49 having a dial gauge is housed inside this measuring instrument case 57. This measuring instrument 49 is fixed to a shaft 59 rotatably provided in a measuring instrument case 57.
An arm 61 is integrally provided on this shaft 59, and the shaft 59 is supported by a torsion spring 63 as shown in FIGS.
In the figure, it is biased in the counterclockwise direction. A back cover 65 is attached to the measuring instrument case 57, and a set screw 67 whose tip abuts against the arm 61 is screwed into the back cover 65 so that it can move forward and backward.
A pin 53 provided on the arm portion 23a of the roller body 23 projects into the measuring instrument case 57 through a pin hole 69 formed in the measuring instrument case 57.
The pin hole 69 is formed to have a large diameter with an appropriate interval relative to the outer diameter of the pin 53, and an O-ring 71 is inserted in this interval to support the pin 53.
Allows vertical and horizontal movement.

As is clear from the above configuration, since the measuring instrument 49 is housed in the measuring instrument case 57, it is protected from cutting oil, cutting debris, and external force. Then, when the set screw 67 is screwed in, the arm 61
The shaft 59 is rotated in the clockwise direction against the biasing force of the torsion spring 63, and the measuring stylus 5 of the measuring instrument 49
1 comes into contact with the pin 53, and the measuring device 49 is set to the measuring state. In addition, when not measuring, when the set screw 67 is loosened, the shaft 59 is rotated counterclockwise by the biasing force of the torsion spring 63, and the measuring instrument 49 is rotated counterclockwise.
The measuring head 51 is detached from the pin 53, and the measuring device 49
is set to non-measurement state.

A cap 75 having a transparent plate 73 is attached to the measuring instrument case 57. Therefore, the cutting back force displayed on the dial gauge of the measuring device 49 can be read through the transparent plate 73.

A stopper 77 is provided on the front surface of the base body 21 to restrict large forward swinging of the roller body 23. Therefore, when screwing in the spring force adjustment screw 41, the roller body 23
The forward swing of the guide roller 27 is restricted.
The parallel state between the band saw blade 17 and the band saw blade 17 is maintained.

In the above configuration, first, the spring force adjustment screw 41 is screwed in to set a predetermined biasing force on the spring 37.

During cutting work, when the band saw blade 17 is bent by the cutting back force, the flange portion 27a of the guide roller 27 is pushed and the roller body 23 receives a backward force, and the cutting back force is caused by the biasing force of the spring 37. is swung backwards until it is equal to . As the roller body 23 swings, the pin 53 moves rearward and pushes the measuring stylus 51 of the measuring device 49, and the amount of deflection of the bandsaw blade 17 is displayed on the dial gauge of the measuring device 49. By adding the amount of deflection displayed on the measuring device 49 to the load on the spring 37, the cutting back force can be determined.

Also, when not measuring, by loosening the set screw 67, the arm 61 and shaft 59 can be rotated against the torsion spring 63.
The measuring stylus 5 of the measuring instrument 49 rotates counterclockwise due to the urging force of the shaft 59.
1 is removed from the pin 53, and the measuring device 49 is set to a non-measuring state.

Furthermore, when performing measurement again, by screwing in the set screw 67, the shaft 59 is rotated in the clockwise direction through the arm 61 against the urging force of the torsion spring 63, and the measuring stylus 51 of the measuring instrument 49 is rotated. is brought into contact with the pin 53, and the measuring device 49 is set to the measuring state. In this case, the zero point adjustment of the measuring device 49 can be easily performed by adjusting the screwing of the set screw 67.

As can be understood from the above explanation, the cutting back force measuring device according to the present invention has a measuring device housed in a measuring device case and isolated from the outside.
It can be protected from damage caused by cutting oil, chips or external forces. Therefore, the cutting back force can be accurately measured without causing measurement errors.

According to the embodiment of the present invention, the measuring instrument can be set in the measuring state and the non-measuring state by a simple operation of adjusting the set screw, and the measuring instrument can be set in the measuring state and at the same time. It is possible to perform zero point adjustment.

Furthermore, by adjusting the spring force adjustment screw, the biasing force of the spring that biases the roller body can be changed, so it is possible to measure a wide range of cutting back forces without replacing the springs.

In the above-mentioned embodiment, the amount of deflection of the bandsaw blade is displayed on the measuring device and the deflection amount is converted into cutting back force. It is also possible to read the cutting back force directly by setting it in advance.

Further, in the above embodiment, the band saw blade guide is a guide roller, but in the case where the band saw blade guide is an insert, the present invention can be implemented by using the back up roller of the band saw blade as a movable part. be able to.

Furthermore, the present invention is not limited to the above-described embodiments, but can be implemented in other forms by making appropriate design changes.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention,
Fig. 1 is a schematic front view of a vertical bandsaw machine equipped with a cutting back force measuring device according to the present invention, Fig. 2 is a front view of the cutting back force measuring device, Fig. 3 is a plan view of the same, and Fig. 4 is a front view of a vertical band saw machine equipped with a cutting back force measuring device according to the present invention. The figure is a sectional view taken along the - line in Fig. 2, Fig. 5 is a sectional view taken in the - arrow direction in Fig. 2, and Fig. 6 is a sectional view taken in the - arrow direction in Fig. 4.
7 is a sectional view taken along the - line in FIG. 4, and FIG. 8 is a sectional view taken along the - line in FIG. 7. Explanation of the symbols representing the main parts of the drawing, 7...
Upper frame, 17...Band saw blade, 19...Band saw blade guide, 21...Base body, 23...Roller body, 25...Hinge pin, 49...Measuring instrument, 51...Measuring point, 53...Pin, 57... Measuring instrument case.

Claims (1)

[Scope of utility model registration request] A base body 21 is provided on the upper frame 7 of the vertical band saw machine, and a roller body 23 supported by the base body 21 is provided so as to be able to freely reciprocate in the front and rear directions toward and away from the band saw blade 17, and in the direction of the band saw blade 17. The band saw blade 1 is biased toward the
Band saw blade guide 1 that guides both sides and back of 7
9 is provided on the roller body 23, and a measuring device 4 is provided in the measuring device case 57 provided on the base body 21.
9 is provided internally, and the measuring stylus 51 of this measuring device 49 is brought into contact with a part of the roller body 23 to detect the amount of rearward movement of the roller body 23 due to the cutting back force of the band saw blade 17. A cutting back force measuring device for a vertical band saw machine, characterized in that it can be freely installed.