JPH0750128Y2 - Slide cover seal mechanism - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention aims to prevent scattering of chips, water, oil, etc. generated in the working process by closing the cutting space in a machine tool such as a lathe, and open it for inspection or work. The present invention relates to a slide cover sealing mechanism for exchanging the above.

[0002]

2. Description of the Related Art In machine tools such as lathes, as shown in FIG.
A slide cover 1 is provided on the front surface of the slide cover 1 so as to be slidable in a direction parallel to the spindle axis, and a cutting space is opened during the work of attaching and detaching a workpiece and a tool to the chuck and closed during the work of the slide cover 1. The processing work can be monitored through the window provided in the. There is a gap between the inside of the slide cover 1 and the fixed cover 2 fixed to the main body of the machine tool, and the wiper blade 3 attached to the peripheral edge of the fixed cover 2 contacts the inner surface of the slide cover 1 for a sealing mechanism. Is provided. In the conventional sealing mechanism, as shown in FIG. 5 which is shown by the cross section taken along the line AA in FIG. 4, the end edge of the fixed cover 2 is bent in a U-shape so that it projects into the cutting space. One end of the wiper blade 3 is fixed to the U-shaped protruding surface 4 by a bolt 6 via a pressing plate 5. The other end 7 of the wiper blade 3 is provided by being bent in a V shape in the direction of the cutting space, and the other end 7 is in contact with the inner surface of the moving door 1. Therefore, during the cutting operation, the gap between the slide cover 1 and the fixed cover 2 is closed, and when the slide cover 1 is moved, the other end 7 of the wiper blade 3 slides on the inner surface of the slide cover 1. , Its wiper blade 3
The other end portion 7 plays a role of scraping off water, chips, etc. adhering to the contact surface 8 of the slide cover 1 on which the slide cover 1 slides into the cutting space.

[0003]

In a large machine tool, since the contact area between the wiper blade and the slide cover is large, the frictional resistance with the slide cover is large when opening and closing the wiper blade, and a large force is required to open and close the slide cover. Is required. In particular, since the wiper blade has a V-shaped cross section, a larger force is required when the wiper blade is opened, and it is difficult to use the drive assist device because of the space in the factory. It is appropriate that the other end of the wiper blade is bent by 1 to 2 mm and comes into contact with the inner surface of the slide cover, but the shape and assembly error of the slide cover and the fixed cover, the deflection due to the weight of the door, and the use thereof Due to the deformation of the door and the like, it is impossible to make the gap between the slide cover and the fixed cover uniform, and it is difficult for the other end 7 of the wiper blade to always prevent the gap. If the inner surface of the slide cover is bent and abutted by 2 mm or more, the sealability is improved, but the frictional resistance with the slide cover increases, and a large force is required to slide the slide cover.

[0004]

SUMMARY OF THE INVENTION The present invention secures a perfect sealing function between a fixed cover and a slide cover and allows the slide cover to move with a small force. A flexible tube that can be expanded and contracted along the peripheral edge of the fixed cover in the gap between the slide cover and the slide cover, and the flexible tube that covers the circumference of the flexible tube and is expanded and contracted by the flexible tube to form a slide cover. A holding plate having side edges facing up and down, a wiper blade attached to the ups and downs of the holding plate, the other end of which contacts the slide cover when the flexible tube contracts, and air is applied to the flexible tube. The seal mechanism is composed of an air supply means for feeding the air, and an air ejection port formed in the flexible tube toward the contact surface of the wiper blade.

[0005]

[Operation] Air is supplied to the flexible tube by the air supply means, and when the flexible tube is inflated, the other end of the wiper blade does not contact the inner surface of the slide cover, so open and close it gently. At the same time, air is jetted from the air jet 11 to the inner surface of the slide cover, and when the air supply is cut off, the flexible tube contracts and the other end of the wiper blade abuts the inner surface of the door to cut the cutting section. Can be occluded and remains airtight.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sealing mechanism according to the present invention is shown in FIGS. 1 and 2 which is a cross section taken along line AA of a wiper blade 3 in FIG.
It will be explained based on. The edge of the fixed cover 2 is bent toward the cutting space in an L-shaped cross section, and the fixed cover 2 is bent as shown in FIG.
A flexible tube 9 having a length corresponding to the gap between the slide cover and the slide cover and capable of expanding and contracting by the pressure of air sent by a known air supply means is provided. The periphery of the flexible tube 9 provided on the fixed cover 2 is covered with a holding plate 10 whose one end is fixed to the fixed cover 2 with a bolt. The holding plate 10 slides on the slide cover 1 by the expansion and contraction movement of the flexible tube 9.
The side end facing the undulating motion. An italy 11 is welded to the undulating portion, which is a side end of the undulating operation, for fixing assistance, and a holding plate 5 is attached to the ita 11 by bolts so that one end of the wiper blade 3 is evenly fixed. The undulating portion is not limited to the side edge of the holding plate 10, and includes the inside of the side edge of the holding plate 10. The other end of the wiper blade 3 is formed to be bendable in a V shape in the direction of the cutting space, and the other end 7 contacts the inner surface of the slide cover 1 to form a contact surface 8. The flexible tube 9 is provided with an air ejection port 12 with a proper width in the longitudinal direction so that the air is blown toward the contact surface 8 of the slide cover 1. One end of 9 is hermetically sealed, and the other end has an air intake port 13, and is connected to an air source 17 via a hose 14, a solenoid valve 15, and a regulator filter 16. When a switch provided on a door handle (not shown) is turned on, the solenoid is turned on and the air enters the flexible tube 9. When the switch is turned off, the solenoid is also turned off and the air does not enter the flexible tube 9. In this example,
Although one end of the flexible tube 9 is sealed, an air intake port may be provided at both ends in order to make the pressure of the air to the jet port 12 uniform. Further, the tip of the fixed cover 2 is bent orthogonally to the slide cover side so that a slight space is provided between the tip and the inside of the slide cover so that the air from the air ejection port is wiped by the wiper blade 3.
Prevent it from flowing to the other side. The present invention is constructed as described above, and its operation is as follows. During the cutting work, the other end 7 is in contact with the inner surface of the slide cover 1 as a shield that closes the gap between the slide cover 1 and the fixed cover 2 as shown in FIG. When the slide cover 1 is opened and closed, a switch provided on a handle of the cover (not shown) is turned on, air enters the flexible tube 9 via the solenoid which is turned on, and the flexible tube is caused by air pressure. 9 expands to elastically deform the holding plate 10, the other end 7 of the wiper blade 3 is lifted from the contact surface 8 of the slide cover 1, and is in a non-contact state with the inner surface of the slide cover. As a result, the frictional resistance with the slide cover is eliminated, and it is possible to move with an extremely light force, and at the same time, air is jetted to the contact surface 8 from the jet outlet 12 formed in the flexible tube 9. Water and chips adhering to the vicinity can be blown off into the cutting space. When the switch provided on the handle of the cover is turned off at an arbitrary point, the solenoid is also turned off, the air in the flexible tube 9 is discharged into the atmosphere, and the holding plate 1
With the restoring force of 0, the other end of the wiper blade 3 comes into contact with the inner surface of the slide cover, and serves as a shield that closes the gap between the slide cover 1 and the fixed cover 2.

[0007]

EFFECTS OF THE INVENTION Even if the contact area with the wiper blade slide cover is wide as in a large machine tool, the other end of the wiper blade is not in contact with the inner surface of the slide cover when the slide cover is opened and closed. There is no frictional resistance with the cover, and it does not require a large force to move the slide cover. Further, when the slide cover is stopped, the other end of the wiper blade can be bent and abutted against the inner surface of the slide cover by a large amount of 1 to 2 mm or more, so that the sealability is greatly improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a seal mechanism of a slide cover according to the present invention.

FIG. 2 is a cross-sectional view of the sealing mechanism when a flexible tube is expanded.

FIG. 3 is an explanatory view of a flexible tube used in the sealing mechanism.

FIG. 4 is a perspective view of a slide cover and a fixed cover of the machine tool.

FIG. 5 is a cross-sectional view of a conventional sealing mechanism.

[Explanation of symbols]

1 ・ ・ Slide cover, 2 ・ ・ Fixed cover, 3 ・ ・ Wiper blade, 4 ・ ・ Projecting surface, 5 ・ ・ Holding plate, 6 ・ ・ Bolt, 7 ・ ・ Other end part, 8 ・ ・ Contact surface, 9 ・・ Flexible tube, 10 ・ ・ Holding plate, 11 ・ ・ ita, 12 ・ ・ Spout,
13 ... Air intake, 14 ... Hose, 15 ... Solenoid valve, 16 ... Regulator filter

Claims (1)

[Scope of utility model registration request] 1. An inflatable / contractible flexible tube provided along the periphery of the fixed cover in the gap between the fixed cover and the slide cover, and an expansion of the flexible tube covering the circumference of the flexible tube. , A holding plate whose side edge facing the slide cover is undulated by a contracting motion, and the holding plate is attached to the undulating portion of the holding plate, and when the flexible tube contracts,
A wiper blade whose other end contacts the slide cover,
A seal mechanism for a slide cover, which is composed of an air supply means for sending air to the flexible tube and an air ejection port formed in the flexible tube toward the wiper blade contact surface.