JP2009131936A - Door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door of which the weight is reduced by decreasing chip deposition. <P>SOLUTION: A transparent plate 21 and two metal plates 22, 23 are firmly fixed by sandwiching the transparent plate 21 by the flat metal plates 22, 23 of substantially the same size, inserting a shaft part 34 of a T-shaped nut 31 into a through-hole 30 arranged in the transparent plate 21 through a through-hole 26 of the metal plate 22 and screwing a set screw 32 to a screw hole 35 formed in the shaft part 34 of the T-shaped nut 31 through a through-hole 27 of the other metal plate 23. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a door provided around a machining area of a machine tool, and more particularly to a door formed by sandwiching a transparent plate between two plate members.

  Conventionally, as described in Patent Document 1, a transparent plate is formed on a door provided inside a cover window covering a machine tool by a plurality of bolts welded to a peripheral portion of the door opening. A barrier is installed around the transparent plate to prevent the coolant from directly hitting the joint between the door and the transparent plate, passing through the gap, and discharging from the opening to the outside. Has been proposed. Then, as shown in FIG. 1, the transparent plate is sandwiched between two plate members having different sizes of the door and the barrier, and a nut is attached to the bolt end that protrudes inward through the transparent plate and the barrier. Is fixed.

JP 2000-317765 A

In the thing of patent document 1, since the edge part of the plate member which comprises a door is bend | folded inside in order to ensure intensity | strength, if processing of the workpiece | work by a machine tool is performed, supplying coolant, it will be scattered. The swarf that has been deposited with the coolant accumulates in the portion bent inside the lower end of the door. Since the accumulated chips contain a coolant, there is a problem that the working environment is deteriorated due to the generation of a stale odor or fixing, and the time required for cleaning the chips becomes longer. In addition, since a plurality of bolts are welded to the peripheral edge of the opening of the door, the door may be distorted by heat due to welding, and the thickness of the plate member constituting the door must be increased, resulting in a heavy door. There is a problem. In addition, nuts are attached to the welded bolt tips, and the bolt tips and nuts protrude inward from the barrier, so that the chips scattered by machining of the workpiece by the machine tool are applied to all bolt tips and nuts. There is a problem that it is easy to catch. In addition, scattered chips may enter between the barrier and the transparent plate.
Therefore, an object of the present invention is to solve the above-mentioned problems, and an object thereof is to provide a door that is reduced in weight by reducing the amount of accumulated chips.

The present invention is a door that is provided around a machining area of a machine tool and has a structure in which a transparent plate is sandwiched between two plate members. The plate members on both sides substantially have a plurality of openings at opposite positions. The transparent plate is formed to have a size that covers the plurality of openings, and the transparent plate and the metal plates on both sides are respectively provided with through holes at opposite positions. The connecting member is inserted into the through hole and the seal member is interposed, and the transparent plate and the metal plates on both sides are fixed by the connecting member, and the through hole is sealed with the seal member. ).
The present invention also provides a connecting member, a T-shaped nut having a head portion and a shaft portion, wherein a screw hole is formed inside the shaft portion, and the shaft portion is inserted into a through hole provided in one metal plate; The head includes a head and a screw shaft, and the screw shaft is inserted into the through hole of the other metal plate and is configured by a set screw that is screwed into the screw hole of the T-shaped nut. ).
Further, the present invention is characterized in that a plurality of shaft members are installed in a space formed either above or below two metal plates and a transparent plate, and rotating members are attached to the respective shaft members. (Claim 3).

  According to the first aspect of the present invention, the plate members on both sides are formed of substantially the same size flat metal plate having a plurality of openings at opposing positions, and the transparent plate is the plurality of transparent plates. The transparent plate and the metal plates on both sides are provided with through holes at a plurality of positions opposite to each other, and a connecting member is inserted into the through hole and a seal member is interposed therebetween. Since the transparent plate and the metal plates on both sides are fixed and the through hole is sealed with a seal member, unlike the conventional door, the bottom edge of the door is not bent inward, so chips accumulate on that part. There is nothing to do. Moreover, since the cutting oil splashed on the door does not stop and easily flows downward, it becomes difficult for the rot smell due to the cutting oil to be generated, and there is an effect of reducing the number of cleanings and increasing the operating rate of the machine. In addition, since it is not necessary to insert the connecting member into the through hole and weld the bolt, it is not necessary to consider the distortion of the metal plate due to heat, so the thickness of the metal plate sandwiching the transparent plate constituting the door As a result, the door can be reduced in weight.

  According to the invention described in claim 2, the connecting member has a head portion and a shaft portion, a screw hole is formed inside the shaft portion, and the shaft portion is formed in a through hole provided in one metal plate. Since it is composed of a T-shaped nut to be inserted, a head and a screw shaft, the screw shaft is inserted into the through hole of the other metal plate, and is screwed into the screw hole of the T-shaped nut. Since the screw shaft of the set screw does not protrude from the head of the T-shaped nut, and the portion protruding from the through hole of the metal plate is only the head of the T-shaped nut, by thinning the head of the T-shaped nut, Compared to a conventional door, there is an effect that the catch of chips can be reduced.

  According to the invention described in claim 3, a plurality of shaft members are installed in a space formed above or below the two metal plates and the transparent plate, and a rotation member is provided on each shaft member. Since the two metal plates are mounted in a flat plate shape, there is an effect of eliminating the accumulation of chips on another member provided for mounting the rotating member.

Embodiments will be described with reference to the drawings.
On the bed 2 of the machine tool 1, a main column 3 a that can move up and down on the front surface, a movable column 3 that can move back and forth, and right and left, and a table 4 that includes a jig (not shown) that holds the workpiece W are installed. ing. A pair of left and right columns 5 and 6 are provided on the rear side of the moving region of the moving column 3, and a support base 7 is fixed to the upper ends of the columns 5 and 6. The support base 7 includes a tool magazine 8 holding a plurality of tools T, and a tool changer 9 having an exchange arm 9a for exchanging the tool T between the tool magazine 8 and the spindle 3a of the moving column 3. Is installed. Side covers 10 are installed on the left and right sides of the bed 2 of the machine tool 1 and surround the moving column 3 and the table 4. This machine tool 1 mounts the tool T on the spindle 3a of the moving column 3 from the tool magazine 8 by the tool changer 9, and moves it to the jig on the table 4 by moving the moving column 3 back and forth, right and left, and moving the spindle 3a up and down. The held workpiece W is processed.

  When the machine tool 1 is used to process the workpiece W while taking out the cutting oil from the periphery of the main spindle 3a and applying it to the workpiece W or the tool T, the cutting oil that hits the workpiece W or hits the tool T rebounds and scatters around. . The side cover 10 of the machine tool 1, together with the front cover 15 and the ceiling cover 16, swarf generated by machining of the cutting oil and the workpiece W is scattered from the machining area A of the workpiece W in front of the moving column 3 to the outside of the machine tool 1. It is provided to prevent this. The side cover 10 is provided with a window 11 for maintenance, inspection, and cleaning, and a door 12 larger than the window 11 is provided inside the window 11.

  The door 12 will be described. The door 12 has a configuration in which a transparent plate 21 is sandwiched between two plate members 22 and 23. The two plate members 22 and 23 are formed of a flat metal plate having a plurality of openings 24 and 25 provided at opposing positions so as to look into the machining area A of the machine tool 1. 22 is larger. Further, a bent portion 14 is provided at an end portion on one end side in the door opening / closing direction of the metal plate 22 in order to prevent intrusion of chips and cutting oil. The transparent plate 21 is formed to have a size that covers the plurality of openings 24 and 25, and through holes 30, 26, and 27 are provided at positions opposite to the transparent plate 21 and the two metal plates 22 and 23, respectively. Is provided. In the through holes 30, 26, 27, a connecting member 28 is inserted and an O-ring 29 exemplified as a seal member is interposed, and the transparent plate 21 and the two metal plates 22, 23 are fixed by the connecting member 28 and penetrated. The holes 30, 26, and 27 are sealed with an O-ring 29. In the present embodiment, the two metal plates 22 and 23 have different sizes. However, a leakage prevention member is provided on the inner side of the side cover 10, and one end side of the door 12 in the door opening / closing direction is provided. By preventing the leakage of cutting oil from one end in the door opening / closing direction when the door 12 is closed so that the outer metal plate 23 and the leakage preventing member are in contact with each other, the bent portion 14 of the metal plate 22 is Alternatively, the two metal plates 22 and 23 may be formed of the same size.

  The connecting member 28 includes a T-shaped nut 31 and a set screw 32. The T-shaped nut 31 is provided with a head portion 33 and a shaft portion 34. The shaft part 34 in which the screw hole 35 is formed is inserted into the through hole 30 provided in the transparent plate 21 through the through hole 26 provided in the one metal plate 22 of the door 12 together with the O-ring 29. The set screw 32 is provided with a head portion 36 and a screw shaft 37. A screw shaft 37 passes through a through hole 27 provided in the other metal plate 23 of the door 12 and is screwed into the screw hole 35. The two metal plates 22 and 23 are pressed against the transparent plate 21 from both sides by the head portion 33 of the T-shaped nut 31 and the head portion 36 of the set screw 32, so that the transparent plate 21 and the two metal plates 22 are pressed. , 23 are fixed. A cushioning material 38 is provided at the other end of the transparent plate 21 between the metal plate 22 and the metal plate 23 in the door opening / closing direction. When the door 12 is closed, the cushioning material 38 comes into contact with the door receiving member 39 provided on the side cover 10 to prevent leakage of cutting oil from the other end side in the door opening / closing direction.

  A plurality of shaft members 43 are installed below the metal plates 22 and 23. A bearing member 44 exemplified as a rotating member is attached to each shaft member 43. A door 12 is mounted on a lower rail 13 fixed to the inside of the side cover 10 via a bearing member 44 so that the door 12 can be opened and closed along the side cover 10. One metal plate 23 of the door 12 is provided with a handle 45 for opening and closing the door 12 and a hook 46. The rail is fixed to the side cover 10 so as to be positioned above the window 11, and a plurality of shaft members 43 are installed in a space formed above the two metal plates 22, 23 and the transparent plate 21, A door in which a bearing member 44 is mounted on each shaft member 43 may be mounted on a rail via a bearing member 44 so as to be opened and closed.

  As described above, the door 12 has a configuration in which the transparent plate 21 is sandwiched between two flat metal plates 22 and 23 having substantially the same size. Unlike the conventional door, the door 12 has a lower end. Since the portion is not bent inward, the chips do not accumulate on the portion. Further, since the cutting oil scattered on the door 12 does not stop and easily flows downward, it becomes difficult for the rot smell due to the cutting oil to occur, and the number of cleanings can be reduced and the operating rate of the machine can be increased. In addition, since the bolts need not be welded, it is not necessary to consider the distortion of the metal plates 22 and 23 due to heat, and the metal plates 22 and 23 sandwiching the transparent plate 21 constituting the door 12 are made thin. The door 12 can also be reduced in weight. Further, the shaft portion 34 of the T-shaped nut 31 is inserted into the through hole 30 of the transparent plate 21 through the through hole 26 provided in the metal plate 22, and the screw hole 35 formed inside the shaft portion 34 is inserted into the screw hole 35 formed inside the shaft portion 34. Since the screw shaft 37 of the set screw 32 is screwed together, the screw shaft 37 of the set screw 32 does not protrude from the head 33 of the T-shaped nut 31 and protrudes from the through hole 26 of the metal plate 22. Since only the head portion 33 of the T-shaped nut 31 is provided, by reducing the thickness of the head portion 33 of the T-shaped nut 31, it is possible to reduce the catch of chips as compared with the conventional door. Further, since a plurality of shaft members 43 are installed in a space formed below the two flat metal plates 22 and 23 and the transparent plate 21, and the bearing members 44 are mounted on the shaft members 43, the bearing members 44. It is possible to eliminate the accumulation of chips on a separate member provided for mounting.

It is a figure which shows the machine tool provided with the door of this invention. It is a front view of the door of the present invention. It is the III-III sectional view taken on the line of FIG. FIG. 3 is an X view of FIG. 2 in a state where a door is on a rail.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Machine tool 12 Door 21 Transparent plate 22 Plate member 23 Plate member 24 Opening part 25 Opening part 26 Through hole 27 Through hole 28 Connecting member 29 O-ring (seal member)
31 T-shaped nut 32 Set screw 33 Head 34 Shaft 35 Screw hole 36 Head 37 Screw shaft 43 Shaft member 44 Bearing member (Rotating member)
A Processing area

Claims (3)

In a door provided around a machining area of a machine tool and having a transparent plate sandwiched between two plate members, the plate members on both sides have a plurality of openings at substantially the same size. The transparent plate is formed in a size that covers the plurality of openings, and the transparent plate and the metal plates on both sides are provided with through holes at positions opposite to each other. And a sealing member interposed between the transparent plate and the metal plates on both sides, and the through hole is sealed with the sealing member. The connecting member has a head portion and a shaft portion, a screw hole is formed inside the shaft portion, and the shaft portion is inserted into a through hole provided in one metal plate, and the head portion and the screw shaft The door according to claim 1, wherein the door is constituted by a set screw inserted into a through hole of the other metal plate and screwed into a screw hole of a T-shaped nut. 2. The shaft member according to claim 1, wherein a plurality of shaft members are installed in a space formed above or below the two metal plates and the transparent plate, and a rotating member is attached to each shaft member. Door.

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