JPH0314279Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a rail surface protection device suitable for machine tools, particularly machine tools having fusing functions such as laser processing machines and plasma cutting machines.

[Conventional technology]

In punch press machines, laser processing machines, etc.
There is a machine tool equipped with a material supply table that supplies a material workpiece to a fixed processing head while moving it in any direction on a plane.

That is, as shown in FIG. A cross slide 5 that moves in one direction (X-axis direction) is provided, and the work w is mounted on the cross slide 5.
There is a material supply table 7 attached with a work holder 6 that holds the material.

The carriage 2 and the moving table 3 are integrated into a rail 8 on the base frame 4.
The cross slide 5 slides on the rail 9 inside the carriage 2, but the rail surface is not damaged by chips, slag, etc. generated during machine tool operation. As shown in Fig. 5, a bellows 11 is often provided on the rail 8.
Particularly in machine tools that have a fusing processing head 1a for laser processing, plasma processing, etc. and generate sparks (spatter), it is essential to cover the rail with a bellows.

[Problem that the invention attempts to solve]

However, when covering the rail with a bellows as described above, a certain length of bellows storage space (ds) is required at both ends of the rail in which the bellows are folded (Fig. 5). There is a drawback that the movement stroke of the moving member becomes shorter, and if you try to obtain a movement stroke of the desired length,
It was necessary to increase the rail length, that is, the length of the base frame 4 and carriage 2 in FIG. 5 mentioned above.

In addition, since the bellows storage space is required at a certain ratio to the rail length, the actual dead space (ds) length taken as the bellows storage space is quite large, especially in large machine tools such as those mentioned above. It was reaching.

[Means for solving problems]

Therefore, this invention has been proposed to provide an endless chain, in which at least a part of the chain extends parallel to the entire length of the rail, parallel to the side surface of the rail, in a part such as the material supply table having a parallel moving member in the machine tool described above. It is rotatable within a flat plane,
A part of the endless chain is connected to a moving member on the rail, and a shielding plate that covers the side surface of the rail is attached to the side surface of the link constituting the endless chain, and adjacent shielding plates are arranged alternately near and far from the side surface of the rail, At least in the straight section along the rail, the above-mentioned shielding plates, which overlap to cover the entire length of the rail, prevent the side surface of the rail from sparks.
It is proposed to protect from chips, slag, etc.

〔Example〕

Hereinafter, embodiments will be described based on the drawings. 1st
The figure shows A of the punch press machine shown in the fifth figure explained earlier.
8 is a vertical cross-sectional view of a similar part, and 8 is a rail extending in the Y-axis direction (left-right direction in the figure) on the base frame 4, and 2 is slidably supported on the rail 8 via a sliding bearing 12. The carriage 5 is a cross slide that is slidably supported on a rail 9 extending in the X-axis direction (direction passing through the figure) within the carriage 2. is protected.

That is, first, the structure inside the carriage 2 will be described. Reference numeral 13 is a frame extending along the longitudinal direction of the carriage.A pair of front and rear rails 9, 14 are arranged on the frame 13. The cross slide 5 is supported so as to straddle the upper part in the front and back directions. Reference numeral 15 indicates a sliding bearing member fixed to the cross slide 5, and reference numerals 16 and 16 indicate rollers that sandwich the rear rail 14 from above and below, and these rollers are arranged along the X-axis direction within the carriage 2 in the same way as the rails 9 and 14 above. A nut member 18 that is screwed onto the ball screw 17 is connected to the lower center surface of the cross slide 5 and is configured to move as the ball screw 17 rotates. 19 is a cover.

The front rail 9 has both sides 21
A, 21b are connected 22 to the cross slide 5 to form an endless chain 21, which is connected to the rail 9.
A protruding plate portion 2 is provided so as to circulate around the entire length in one vertical plane, and is formed to protrude to the side of each link 23 constituting the endless chain 21.
3a, substantially rectangular shielding plates 24 are fixed at every four nodes of the link 23 (FIGS. 2 and 3).

The above-mentioned shielding plates 24 are fixed to the chain 21 so as to maintain a vertical posture, and are made so that the widths of every other shielding plate 24 overlap slightly at both ends. It is adapted to form a series of shielding strips substantially covering its entire length.

25 and 26 are guide plates that guide the upper straight portion and the lower straight portion of the endless chain 21, respectively; 27 is a sprocket that is rotatably supported by the frame 13 and around which the endless chain 21 is suspended; The lower straight part of passes through the hollow part in the frame 13. In addition, the above sprocket 2
7 are provided as close as possible to both ends of the rail 9.

Next, to explain the protection device for the surface of the rail 8 extending in the Y-axis direction, as shown in FIGS. has been formed,
Both ends 29a and 29b are connected to the sliding bearing 12 3
1, and the endless belt 29, which is connected 31 to the through hole 12 and becomes endless by passing through the through hole 28, circulates around the entire length of the rail 8 in one vertical plane. The way you do it is how you earn it.

Reference numeral 32 denotes rollers which are rotatably supported by the base frame 4 via a bracket 33 and around which the endless belt 29 is wound. 34 is a receiving roller for preventing the endless belt 29 from sagging within the through hole 28.

The endless belt 29 has a width wider than the rail 8 width, and is set at a connection 31 position (low position) as close to the rail 8 as possible within a range where the hanging position does not contact the upper surface of the rail 8.

In addition, the above-mentioned carriage 2 and the carriage 2
The movable table 3 integrated with the carriage 2 is made of a nut member fixed to the lower surface of the carriage 2 on a ball screw horizontally suspended on the base frame 4 along the Y-axis direction, in substantially the same way as the cross slide 5 described above. (not shown).

Since the machine tool of this embodiment is constructed as described above, while the workpiece holder 6 holds the sheet metal workpiece W during the cutting process using the head 1a,
Even if the cross slide 5 and carriage 2 are moved to move the workpiece W to an arbitrary position,
Sparks do not strike the upper surface of the rail 8 directly facing the fusing head 1a where sparks (spatter) are generated.

Furthermore, since both the endless chain 21 and the endless belt 29 are suspended around the sprocket 27 and roller 32 that are as close as possible to both ends of the rails 9 and 8, the cross slide 5 and the carriage 2 as moving members are suspended.
Even if the travel stroke is set to be approximately equal to the length of the rails 9, 8, there is no need to extend the carriage 2 and base frame 4 beyond the length of the rails 9, 8.

[Effect of idea]

As is clear from the above explanation, if the rail surface protection device according to this invention is used, the movement stroke of the moving member on the rail will not be limited to a shorter length than in the case of using the bellows described above, and it will be easier to A stroke approximately equal to the rail length can be obtained,
In order to obtain the same movement stroke, the length of the base frame and the members supporting the rails, such as the carriage, can be shortened as much as possible, and the overall size of the machine tool can be reduced accordingly. More specifically, shielding plates that cover the side surfaces of the rails are attached to the side surfaces of the endless chain, and adjacent shielding plates are placed alternately near and far from the rail sides, so that the adjacent shielding plates cover the chain rotation at the end of the rail. The storage space for the conventional side shielding plates (for example, the 47th Utility Model Act
24354) is not required, the above-mentioned miniaturization can be achieved.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of the carriage part on the base frame (a vertical sectional view of the part corresponding to part A in Figure 5 of the punch press machine). Figure 2 is a front view of the endless chain and shielding plate (the - line in Figure 1). Figure 3 is a view taken along the - line in Figure 2, Figure 4 is a sectional view taken along the - line in Figure 1, and Figure 5 is a perspective view of a punch press machine equipped with a conventional rail protection device. It is a diagram. 2...Carriage, 5...Cross slide,
8, 9...Rail, 21...Endless chain, 21
a, 21b...both ends, 22...connection, 23...link, 24...shielding plate.

Claims (1)

[Scope of utility model registration request] An endless chain, at least a portion of which extends parallel to the entire length of the rail, is provided rotatably in a plane parallel to the side surface of the rail, and a portion of the endless chain is connected to a moving member on the rail. A rail surface protection device for a machine tool in which a shielding plate that covers the rail side is attached to the side of a link constituting a chain, and adjacent shielding plates are arranged alternately near and far from the rail side.