JP4435887B2 - Ball screw drive dustproof device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dustproof device for a ball screw drive system in a plate material processing machine or the like.
[0002]
[Prior art]
In a plate material processing machine such as a laser processing machine, a labyrinth packing, a scraper or the like is usually used for the seal of the ball screw drive system at the boundary between the shaft and the bracket.
[0003]
[Problems to be solved by the invention]
However, sufficient dust-proofing measures are not always taken for dust generated during cutting with a laser beam machine in the above-described conventional example, and the ball screw part and other sliding parts are not used for a long time. There is a problem such that wear progresses, looseness occurs, and processing accuracy is affected.
[0004]
The present invention has been made paying attention to the above-mentioned points. A seal belt is provided on the lower surface of the seal box that shuts off the ball screw drive system from the surroundings, and the nut bracket of the ball screw is used to seal the seal box. An object of the present invention is to provide a ball screw drive system dustproof device that enables a moving positioning operation for a machining operation while maintaining the state.
[0005]
[Means for Solving the Problems]
The present invention can solve the above problems by providing the following configuration.
[0006]
(1) A ball screw driving system dustproof device used for moving and positioning a workpiece in a plate material processing machine such as a laser processing machine, wherein the ball screw driving system is parallel to a ball screw and an axis of the ball screw that guides the ball screw. A seal belt provided with an opening having a desired width in parallel with the shaft on the lower surface of an elongated seal box including a ball screw, and having an elastic member attached to the elongated opening. A support having an appropriately curved surface that fits in the opening and seals the inside of the seal box and is slidably engaged with the ball screw and in contact with the upper surface of the seal belt at the lower part of the nut bracket. Is detachably screwed with a screw member, and the pressing member is slidably urged by a spring member so as to press the lower surface of the seal belt from below to open the upper surface. The support body mounted on the lower part of the nut bracket is inserted into the housing by sandwiching a seal belt from above, and the support body and both sides of the housing are connected and fixed by screw members, the sealed state of the seal box and can be maintained, preventing dusts from entering into the sealing box also in cooperation with, when moving the positioning operation the pressing member the nut bracket and the housing of the ball screw has the support and the spring member A dustproof device of a ball screw drive system characterized by being made possible.
[0007]
(2) The ball screw drive system dustproof device according to (1) above, wherein the seal belt is made of spring steel.
[0008]
(3) said elastic member is a synthetic rubber or wood fat or Rannahli, the sealing belt is affixed to the inner side of the seal box and depressible structure the contact surface of the two side portions abutting the sealing box The ball screw drive system dustproof device according to (1) above, wherein the sealed state can be maintained by contacting with the opening of the seal box.
[0009]
(4) in the housing protrudes the upper end to the open top edge portions of the moving direction before and after the housing, a slidable pressure member in contact with the sealing belt underside, the open top edge of the housing side portions parts and the plate-like elastic member as a sealing member having a shielding function is slidably provided both in contact with the lower surface of the seal box, the housing and the seal box a sealed state via the seal belt maintain, the preceding characterized in that it possible to prevent the dust dirt penetrate into the seal box (1) ball screw drive system dustproof device according.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below.
[0011]
FIG. 1A is a longitudinal side view showing an embodiment of a ball screw drive system dustproof device according to the present invention, FIG. 1B is a cross-sectional explanatory view showing the state of attachment of a seal belt to a seal box, and FIG. c) is a partially enlarged explanatory view showing the state of attachment of the seal belt to the seal box, FIG. 2 (d) is a cross-sectional explanatory view of the principal part configuration, and FIG.
[0012]
Referring to the drawings, 1 is a ball screw, 2 is a guide (or LM guide), 3 is a seal box, 4 is an opening provided on the lower surface of the seal box 3, and 5 is an elastic material such as NBR or other synthetic rubber or resin. The members 6 and 6 are seal belts made of spring steel or the like, and can be sealed by attaching the elastic member 5 and fitting into the opening 4 provided on the lower surface of the seal box 3 (FIG. 1B, ( c)).
[0013]
7 is a nut bracket, 8 is a support body, and 9 is a screw member. The support body 8 is fixed by a plurality of screw members 9 from below and outside so as to support the nut bracket 7 below the nut bracket 7. Install.
[0014]
Reference numeral 10 denotes a pressing member (also referred to as a scraper), 11 denotes a spring member, and 12 denotes a casing with an open top surface. The casing 12 is energized upward by the spring member 11 inside the front and rear end portions in the moving direction. A pressing member 10 is provided so as to press the seal belt 6 from below. Further, as shown in FIG. 1 (d), a sealing member (lip seal) having a shielding function at the upper surface edges of both side ends of the upper surface open type casing 12. The plate-like elastic member 12a is slidably provided in contact with the lower surface of the seal box 3, and the support 8 connected to the lower portion of the nut bracket 7 is sandwiched between the seal belt 6 and the housing 12 from above. Then, the support body and both sides of the housing are connected and fixed by the screw member 13, the seal box 3 and the housing 12 are kept in a sealed state via the seal belt 6, and the ball screw is also used during the movement positioning operation. Dust intrusion into the drive train And it is configured to be able to prevent.
[0015]
The operation will be described based on the above-described configuration.
[0016]
In a plate material processing machine such as a laser processing machine, for example, when a processing head H is subjected to a high-precision positioning operation using a ball screw mechanism or the like when processing a workpiece W positioned on machine coordinates, The nut bracket 7 moves horizontally along the axis of the ball screw 1 by the rotational drive, and the lower curved surface portion of the support pair 8 fixedly attached to the lower portion of the nut bracket 7 by a plurality of screw members 9 is provided on the seal belt 6. The elastic member 5 attached to the inner upper surface is slidably contacted, and the support 8 and the upper surface-open housing 12 are moved upward by a spring member 11 at the front and rear portions in the housing 12. A pressing member 10 provided so as to be urged and pressed presses the seal belt 6 so as to be slidable from below, and further has a sealing function at the upper surface edges of both side ends of the upper surface-open casing 12. A plate-like elastic member 12a as a lip seal) is slidably provided in contact with the lower surface of the seal box 3, and a support body 8 connected to the lower part of the nut bracket 7 is placed in the housing 12 with the seal belt 6 from above. Since the both sides are connected and fixed by the screw members 13, the seal belt 6 can be moved forward and backward so as to be sandwiched and handled from above and below during the positioning operation. However, it is possible to prevent the dust from entering the ball screw drive system while maintaining the sealed state of the drive system.
[0017]
This dustproof device can be widely applied not only to the ball screw drive system but also to all drive systems using racks, LM guides, linear motors, etc. Furthermore, it should be used in place of optical axis bellows such as laser processing machines. Is also possible.
[0018]
In addition, if it adds, both sides of the seal belt using spring steel are rounded with roundness, and the seal belt is fitted as shown in FIG. 1 (c) enlarged view. The opening 4 of the seal box 3 is specially processed so that it is easy to do.
[0019]
【The invention's effect】
According to the present invention, the seal screw is provided on the lower surface of the seal box that hermetically encloses the ball screw drive system from the surroundings, and the nut bracket of the ball screw moves for processing operation while maintaining the sealed state of the seal box. The effect of enabling the positioning operation is exhibited.
[Brief description of the drawings]
1A is a longitudinal side view showing an embodiment of a dustproof device for a ball screw drive system according to the present invention, FIG. 1B is a cross-sectional explanatory view showing the state of attachment of a seal belt to a seal box, and FIG. ) Partial enlarged explanatory view showing the state of attachment of the seal belt to the seal box, (d) Main part cross-sectional explanatory view [FIG. 2] Schematic diagram showing the general configuration of the ball screw drive system [Explanation of symbols]
1 Ball screw 2 Guide (LM guide)
DESCRIPTION OF SYMBOLS 3 Seal box 4 Opening part 5 Elastic member 6 Seal belt 7 Nut bracket 8 Support body 9 Screw member 10 Pressing member 11 Spring member 12 Case 12a Plate-like elastic member (lip seal)
13 Screw member H Processing head W Workpiece

Claims (4)

A ball screw drive system dustproof device used for workpiece positioning in a plate material processing machine such as a laser processing machine, wherein the ball screw drive system includes a ball screw and a guide parallel to the axis of the ball screw that guides the ball screw. Provided with an opening having a desired width in parallel to the shaft on the lower surface of an elongated seal box including the ball screw, and a seal belt having an elastic member attached to the elongated opening. The seal box is sealed and the inside of the seal box is hermetically sealed, and a support body having an appropriately curved surface that can be slid in contact with the upper surface of the seal belt can be attached to and detached from the lower portion of the nut bracket that is screwed onto the ball screw. The screw member is screwed and attached, and the pressing member is slidably biased by a spring member so as to press the lower surface of the seal belt from below. A support body provided at the lower part of the nut bracket is inserted into the housing with a seal belt sandwiched from above, and the support body and both sides of the housing are connected and fixed by screw members. and capable of maintaining a sealed state, in cooperation with the pressing member the nut bracket and the housing of the ball screw has the support and spring members, also possible to prevent the dusts from entering into the sealing box during movement positioning operation A dustproof device for a ball screw drive system. 2. The dustproof device for a ball screw drive system according to claim 1, wherein the seal belt is made of spring steel. The elastic member is a synthetic rubber or wood fat or Rannahli, is affixed to the inner side of the sealing belt, the sealing box abutting against both side portions and pressable structure the contact surface of the seal box, wherein 2. A dustproof device for a ball screw drive system according to claim 1, wherein the sealed state can be maintained by contacting with the opening of the seal box. Shielding the housing, protrudes the upper end to the open top edge portions of the moving direction before and after the housing, a pressing member slidably in contact with the sealing belt underside, an open top edge portions of the housing side portions a plate-like elastic member as a sealing member having a function slidably provided both contact with the lower surface of the sealing box, the housing and the seal box maintains a sealed state via the seal belt, preventable and dustproof device of the ball screw drive system according to claim 1, characterized in that the dust dirt entering the said seal box.

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