JPH07106526B2 - Table mounting device for belt-driven machine tools - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a table mounting device for a belt-driven machine tool having a table that slides back and forth by driving a belt.

2. Description of the Related Art Conventionally, in a small or medium-sized machine tool having a reciprocally slidable table, a wire rope 1 is used to reciprocally slide a table 2 as shown in FIG. The timing belt 3 is used as shown in FIG.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention First, as shown in FIG. 4, in a machine tool that reciprocally slides a table 2 using a wire rope 1, the wire rope 1 is spirally wound around a cylindrical drum 4. ing. Therefore, when the drum 4 is rotated to slide the table 2, the table 2 slides as the table 2 slides.
The pulling direction of the wire rope 1, which acts on, changes little by little. Therefore, the straight movement of the table 2 is hindered,
A workpiece (not shown) set on the table 2 has a drawback that it is difficult to obtain straightness along the sliding direction of the table 2.

Further, since the wire rope 1 is wound around the drum 4 every time the table 2 is slid, the wire rope 1 is easily damaged and has a short life. In addition, drum 4
It is possible to extend the life of the wire rope 1 by increasing the diameter of the drum 4. However, when the diameter of the drum 4 is increased, the position of the handle (not shown) for rotating the drum 4 is increased and the table 2 is moved. There is a drawback in that the operability of sliding back and forth becomes poor.

Next, in the machine tool that reciprocally slides the table 2 by using the timing belt 3 as shown in FIG. 5, after mounting the table 2 on the saddle 5, the timing belt 3 is attached to the lower surface of the central portion of the table 2. It is difficult to assemble the machine tool.

Further, since the timing belt 3 is directly connected to the table 2, sliding from the timing belt 3 is easily transmitted to the table 2, and the surface of the workpiece set on the table 2 by the vibration transmitted from the timing belt 3 to the table 2. There is a drawback that the accuracy is reduced.

In a machine tool equipped with a table mounted on an upper portion of a saddle and sliding back and forth by driving a belt, the machine tool is disposed between the belt and the table and is substantially Connecting members facing each other in parallel were attached to the belt, and both ends of the connecting member were connected to lower surfaces of both ends in the sliding direction of the table.

Operation When assembling the machine tool, after attaching the connecting member to the belt, the table is attached to the upper part of the saddle, and then both ends of the connecting member are connected to the lower surfaces of both ends in the sliding direction of the table. Therefore, it becomes easy to attach the connecting member to the belt and to connect the connecting member to the table,
Easy assembly of machine tools. Further, the vibration transmitted from the belt is buffered by the connecting member, the vibration on the table is reduced, and the surface accuracy of the workpiece set on the table is improved.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 3. First, as shown in FIG. 3 for the outline of the machine tool, a saddle 7 is reciprocally slidably mounted on an upper portion of a base 6, and a table 8 is reciprocally slidably slid on an upper portion of the saddle 7. Has been. A handle 9 for slidingly operating the saddle 7 is attached to the base 6, and a handle 10 for slidingly operating the table 8 is attached to the saddle 7. A column 11 is erected on the upper part of the base 6, and the column 11
A grindstone 12 for grinding is attached to this so as to be vertically slidable.

Next, a recess 13 extending in the left-right direction is formed in the center of the upper surface of the saddle 7, and a sprocket 14 is fixedly attached to one end of the recess 13.
The rotating shaft 15 of the handle 10 is connected to the central portion of the. On the other hand, a sprocket holder 16 is attached to the other end of the recess 13 along the longitudinal direction of the recess 13 so that its position can be adjusted. The sprocket 17 and the sprocket 14 held by the sprocket holder 16 are A timing belt 18, which is a belt, is wound between the two.

A mounting bracket 19 is fixed to the timing belt 18 so as to hold the timing belt 18 from above and below. Next, the timing belt 18 and the table 8
A steel plate 20 that is a connecting member that is disposed between the steel plate 20 and the timing belt 18 and that faces the timing belt 18 in a substantially parallel manner is provided. It is connected to 19. The steel plate
20 extends in the left-right direction along the concave portion 13, and both ends of the steel plate 20 are fixed to the lower surfaces of both ends of the table 8 in the left-right direction by bolts 22.

In such a configuration, when the handle 10 is rotated, the timing belt 18 wound between the sprockets 14 and 17 is rotated, and as the timing belt 18 is rotated, the mounting bracket 19, the steel plate 20, and the table 8 are left and right. Slides in one direction. Here, since the timing belt 18 and the table 8 are connected via the mounting bracket 19 and the steel plate 20, the timing belt 18 is connected by the mounting bracket 19 and the steel plate 20.
The vibration transmitted from 18 to the table 8 is buffered, and the table 8
Vibration is reduced and the surface accuracy of the workpiece set on the table 8 is improved. In addition, no matter where the table 8 is slid, the direction of action of the force from the timing belt 18 for sliding the table 8 is always constant, and the table 8 accurately moves straight.

Next, in the process of assembling the machine tool, the timing belt 18 is wound between the sprockets 14 and 17 with the table 8 removed from the saddle 7. At this time, the sprocket holder 16 is slid along the longitudinal direction of the recess 13 by turning the adjusting bolt 23, and the tension of the timing belt 18 is adjusted. Then, the mounting bracket 19 is fixed to the predetermined position of the timing belt 18, and the steel plate 20 is attached to the mounting bracket 19. Therefore, mounting the timing belt 18 and mounting bracket 19
Since the fixing is performed with the table 8 removed, these operations can be performed very easily. Further, the mounting bracket 19 is fixed to the timing belt 18, and the steel plate is mounted on the mounting bracket 19.
After mounting 20, the table 8 is mounted on the upper portion of the saddle 7, and both ends of the steel plate 20 are connected to the lower surfaces of both ends of the table 8 in the sliding direction. Here, since the steel plate 20 is connected to the table 8 at both ends of the table 8, the saddle 7 and the base 6 do not hinder the connecting work, and the connecting work can be easily performed.

In this embodiment, the mounting bracket 19 is fixed to the timing belt 18, and the steel plate 20 that is the connecting member is connected to the mounting bracket 19, but a connecting member that integrates the mounting bracket 19 and the steel plate 20 is used. It may be provided, and this connecting member may be connected to the timing belt 18.

EFFECTS OF THE INVENTION According to the present invention, by connecting the connecting member to the belt as described above and connecting both ends of the connecting member to the lower surfaces of both ends in the sliding direction of the table, the belt is attached or connected to the belt. It is possible to connect the members with the table removed, and since the connecting members are connected to the table at both ends of the table, saddles and the like do not hinder the connecting work. And the belt can be easily replaced.Because the belt and the table are connected via a connecting member, it is possible to reduce the vibration transmitted from the belt to the table and set it on the table. This has the effect of improving the surface accuracy of the workpiece.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention. FIG. 1 is a vertical sectional front view showing a mounted state of a table, FIG. 2 is a vertical sectional side view showing a mounted state of a table, and FIG. Is a schematic view showing the entire machine tool, FIG. 4 is a perspective view showing a conventional example of wire rope drive, and FIG. 5 is a front view showing a conventional example of belt drive. 7 …… Saddle, 8 …… Table, 18 …… Belt, 20 ……
Connecting member

Claims (1)

[Claims] 1. A machine tool having a table mounted on an upper portion of a saddle and reciprocatingly sliding by driving a belt, the machine tool being disposed between the belt and the table and being substantially parallel to the belt. A table attachment device for a belt-driven machine tool, characterized in that opposing connecting members are attached to the belt, and both ends of the connecting member are connected to lower surfaces of both ends in the sliding direction of the table.