JPH0559509U - Machine tool operating lever - Google Patents

Abstract

(57) [Summary] [Purpose] The processing part connected to the operating lever and the work piece are relatively easily brought into pressure contact with each other within the allowable range. An operating lever 11 for moving a spindle 6 of a machine tool 1 downward is divided into a first rod 12 and a second rod 14, and both rods 12 and 14 are connected by a coil spring 13. When the grip portion 5 provided at the tip of the second rod 14 is rotated downward to lower the spindle 6, the grindstone 8 is pressed against the work W, while the coil spring 13 bends in an arch shape. .. Excessive operating force applied to the operating lever 11 is attenuated by the bending deformation of the coil spring 13, and the operating force F during the rotating operation of the operating lever 11 is maintained while maintaining the allowable range of the pressing force Fb of the grindstone 8 against the work W.
The adjustment range of a is expanded.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an operating lever of a machine tool.

[0002]

[Prior Art]

 Conventionally, as an operation lever of a machine tool, there is, for example, one shown in FIG. That is, a main body 2 of a center lapping machine 1 which is a machine tool is provided with a shaft 3 which is bidirectionally rotatable by a predetermined rotation angle. The shaft 3 supports an operation lever 4 having a circular cross section, which has a mounting portion 10 as a base end, and a spherical grip portion 5 as an operation end is provided at the tip of the operation lever 4. ing. Further, the shaft 3 is urged inside the main body 2 (not shown) so that the tip of the operation lever 4 is rotated upward, whereby the operation lever 4 is rotatable downward. Its free end (grip 5) is maintained in place. Further, the main body 2 has a spindle 6 which is connected to the operation lever 4 in the main body 2 and which descends in conjunction with the free end portion of the operation lever 4 when the free end portion is rotated downward. It is provided. Further, a grindstone 8 which is a processing part having a conical end is attached to the lower end of the spindle 6 via a chuck 7. On the other hand, below the grindstone 7, a work receiver 9 is arranged at a position (not shown) of the center lapping machine 1.

Then, when the worker performs a working operation using the center lapping machine 1, the work W is placed on the upper part of the work receiver 9, while the free end of the operation lever 4 is directed downward. The spindle 6 is rotated (arrow B) to lower the spindle 6 (arrow B), and the tip of the rotating grindstone 8 is brought into pressure contact with the work W. As a result, the work W is lapped. Further, in the above machine tool 1, the pressing force of the grindstone 8 against the work W is adjusted by the feeling of the operator.

[0004]

[Problems to be solved by the device]

 However, in such a conventional operation lever 4, the operation force applied to the free end portion having the grip portion 5 is converted into the force for the grindstone 8 to press the work W as it is via the shaft 3 and the spindle 6. The operating force is adjusted by the operator's feeling as described above. Therefore, especially for an unfamiliar worker having a strong arm strength, the operating force applied to the free end portion of the operating lever 4 becomes too strong after the contact between the grindstone 8 and the workpiece W, and the grindstone 8 will be damaged. It was difficult to adjust the pressing force against the work W within the allowable range. For this reason, the machining accuracy of the work W becomes unstable, and the grindstone 8 is often pressed against the work W by an unnecessarily large force. As a result, the life of the grindstone 8 is short and the machining cost is increased. Was there.

The present invention has been made in view of such a conventional situation, and it is an operating tool of a machine tool that can relatively easily press a machining portion and a work with a force within an allowable range. Intended to serve the bar.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, in the present invention, an operation lever supported by a main body is manually operated, a processing part connected to the operation lever is moved, and then the processing part is pressed against the work to process the work. In the operation lever of the machine tool described above, a base end portion supported by the main body and an operation end portion operated during the manual operation are connected by a flexible connecting member. Further, it is preferable that the connecting member is a coil spring.

[0007]

[Action]

 In the above configuration, when the operator operates the operation end portion of the operation lever to move the processing portion, the processing portion is pressed against the work, and the work is processed by the processing portion. At this time, since the connecting member that connects the operation end portion and the base end portion of the operation lever supported by the main body of the machine tool has flexibility, the connection member does not contact the machining portion and the work. After that, the operator flexes as much as the operating force applied to the operating end of the operating lever. Therefore, after the contact between the processing part and the work, a part of the excessive force, which is unnecessary for the processing of the work, is absorbed by the bending deformation of the connecting member. The adjustment range of the operating force when the operating lever is turned is expanded while maintaining the allowable range of the pressing force of. Therefore, the pressing force in the processed portion can be easily adjusted within the allowable range.

If the connecting member is a coil spring, for example, when the existing operation lever has a circular cross section, the operation lever is connected to the base end side supported by the main body of the machine tool and the operation end. After cutting to the cut side, one end of the connecting member (coil spring) is fitted onto the cut portion on the base end side, and the other end of the connecting member is fitted to the cut portion on the operating end side. As a result, the existing operating lever can be easily changed to the operating lever of the present invention.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. That is, FIG. 1 shows a main part of a center lapping machine 1 which is a machine tool having an operating lever according to the present invention. The center lap board 1 has a main body 2 provided with a shaft 3 which is rotatable in both directions by a predetermined rotation angle, and an operation lever 11 is supported on the shaft 3. The operation lever 11 includes a first rod 12 having a mounting portion 10 that is a base end portion supported by the shaft 3, and a coil spring 13 that is a connecting member having one end portion externally fitted to the tip end of the first rod 12. , A second rod 14 having one end internally fitted to the other end of the coil spring 13, and the other end of the second rod 14 is provided with a spherical grip portion 5 serving as an operating end. ing. Further, the shaft 3 is urged in the main body 2 so that the free end portion of the operation lever 11 is rotated upward, whereby the operation lever 11 is rotatable downward, and The free end portion (grip portion 5) is biased to a predetermined position.

Further, the main body 2 is connected to the operating lever 11 via the shaft 3 in the main body 2, and when the free end portion of the operating lever 11 is rotated downward. There is provided a spindle 6 that descends in conjunction with. Further, a grindstone 8 which is a processing portion whose tip is formed into a conical shape is attached to the lower end of the spindle 6 via a chuck 7. On the other hand, below the grindstone 8, a work receiver 9 is arranged at a location (not shown) of the center lapping machine 1.

In the above-mentioned configuration, when the worker performs the working work using the center lapping machine 1, the work W is placed on the upper part of the work receiver 9 and, as shown in FIG. The gripping portion 5 is gripped, and it is rotated downward (arrow A) against the bias applied to the shaft 3 to lower the rotating spindle 6 (arrow B). ). Eventually, the grindstone 8 comes into contact with the work W and the rotation of the shaft 3, that is, the rotation of the first rod 12 is prevented. When the operator further rotates the operation lever 11, the coil spring 13 bends in an arch shape by an amount corresponding to the operation force Fa, while the grindstone 8 is pressed against the work W and the work W is lapped. It At this time, the pressing force Fb applied to the work W is smaller than the operating force Fa for rotating the operating lever 11 by the amount of the force ΔF spent for bending the coil spring 13 (Fb = Fa−ΔF).

Here, when an excessive operating force Fα is added to the operating force Fa and the operating force Fa exceeds a predetermined range (Fa = Fa + Fα), the load Fb applied to the work W is also increased. In this case, since a part of the excessive operating force Fα is spent for further bending the coil spring 13, the excessive pressing force Fβ applied to the work W is smaller than the operating force Fα (Fβ = Fα−ΔF ). Therefore, a part of the excessive operating force Fα is absorbed by the bending deformation of the coil spring 13, so that the operating force of the operating lever 11 during the turning operation is maintained while the allowable range of the pressing force of the grindstone 8 against the work W is maintained. The adjustment range of operating force is expanded. Therefore, even if the worker is an unfamiliar worker having strong arm strength, the allowable range of the operation force when the operation lever 11 is rotated is expanded, so that the pressing force of the grindstone 8 against the work W can be easily applied. It can be adjusted within the allowable range. As a result, it becomes possible to stabilize the machining accuracy of the work W, and it is possible to prevent the grindstone 8 from being pressed against the work W by an unnecessarily large force, thereby prolonging the life of the grindstone 8 It is also possible to reduce costs.

Further, in this embodiment, since the coil spring 13 is used as the flexible connecting member, the operation lever 4 (see FIG. 3) shown in the conventional example is moved in the middle of its longitudinal direction. After cutting perpendicular to the axial direction, one end of the coil spring 13 is externally fitted to the base end side cut portion supported by the shaft 3, and the free end side cut portion having the grip portion 5 at the tip is attached. The existing operating lever 4 can be used as the operating lever 11 of the present invention by fitting it in the other end of the coil spring 13. Therefore, the operation lever of the present invention can be realized very easily and at low cost.

In the operating lever 11 of the present embodiment, the coil spring 13 is provided with the first rod 12 and the second rod 13 in between, and the attaching portion 10 as the base end and the gripping portion as the operating end. Although the connection of the portions 5 is shown, the first rod 12 and the second rod 13 may be eliminated and the attachment portion 10 and the grip portion 5 may be directly connected. Further, the flexible connecting member is not limited to the coil spring 13 and may be, for example, hard rubber as long as it has flexibility.

[0015]

[Effect of the device]

 As described above, according to the present invention, in the operation lever of the machine tool, the base end supported by the main body of the machine tool and the operation end operated at the time of manual operation are connected by the flexible connecting member. Therefore, when the operating lever is manually operated to press the working portion connected to the operating lever against the work, the connecting member is bent, so that the excessive operating force is attenuated. Therefore, the range of adjustment of the operating force at the time of rotating the operating lever is expanded, so that even if the operator is an unfamiliar operator who has strong arm strength, the allowable range between the processing part and the workpiece is relatively easy. It becomes possible to press-contact with the internal force. As a result, it is possible to stabilize the machining accuracy of the work, prevent the machining part from being pressed against the work by an excessive force, and prolong the life of the machining part to reduce the machining cost. It is possible to reduce it.

When a coil spring is used as the connecting member, if the existing operation lever has a circular cross section, the existing operation lever is cut into a base end side and an operation end side. After that, both cutting parts can be connected by internally fitting both ends of the coil spring, and the existing operation lever can be changed to the operation lever of the present invention. Therefore, the present invention can be realized very simply and at low cost.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a view showing a state where the coil spring of the embodiment is bent.

FIG. 3 is a diagram showing a conventional example.

[Explanation of symbols]

 1 Center Lapping Machine (Machine Tool) 2 Main Body 5 Gripping Part (Operating End) 10 Mounting Part (Base End) 13 Coil Spring (Connecting Member) W Work

Claims (2)

[Scope of utility model registration request] 1. An operation lever of a machine tool for processing a work by manually operating an operation lever supported by a main body, moving a processing part connected to the operation lever, and then pressing the processing part against a work to process the work. An operating lever of a machine tool, wherein a base end portion supported by the main body and an operation end portion operated during the manual operation are connected by a flexible connecting member. 2. The operating lever for a machine tool according to claim 1, wherein the connecting member is a coil spring.