JP3742020B2 - Telescopic cover and cover piece used for it - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a telescopic cover for protecting a guide rail of a machine tool and a cover piece used therefor.
[0002]
[Prior art]
In a machine tool, a column on which a tool is mounted is reciprocated along a guide rail with respect to a workpiece supported on a table, and for example, drilling is performed on the workpiece. A telescopic cover is provided to protect the guide rails by preventing chips and coolant generated during processing from adhering to the guide rails. In this telescopic cover, a plurality of cover pieces are overlapped with each other and connected by, for example, a pantograph. Each cover piece has a main body plate formed in a gentle mountain shape when viewed from the extending direction, and a mounting rib is integrally formed by bending the base end edge of the main body plate. An attachment plate that is formed as a separate member with respect to the mounting rib and has a larger thickness than the main body plate is welded.
[0003]
A roller that rolls along the guide rail is supported on the lower edge of the attach plate. Further, a wiper for cleaning dust, coolant liquid, etc. attached to the upper surface of the main body plate is provided at the front end edge of each cover piece. When the column is moved along the guide rail, the telescopic cover is extended or reduced to protect the guide rail.
[0004]
[Problems to be solved by the invention]
However, the conventional telescopic cover has a problem that the number of parts cannot be reduced because the attachment plate is made of a separate member, and the manufacturing and assembling work is troublesome and the cost cannot be reduced. It was. In addition, when an attachment plate having a large wall thickness is used, the entire cover piece becomes heavy, and there is a problem that the inertia force increases when the telescopic cover is extended and contracted at a high speed, which hinders speeding up.
[0005]
The present invention eliminates the problems in the prior art described above, reduces the number of parts, facilitates manufacturing and assembling work, can reduce costs, and can be reduced in weight and has a telescopic cover that can be reduced in weight. It is to provide.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is a telescopic cover configured such that a plurality of cover pieces are overlapped with each other and can be extended or reduced, and is positioned on a base end side of the cover pieces , folded to form inwardly an attach plate provided so as to direct downward the body plate integrally from the proximal end edge of the body plate of the cover piece, integrally whole of the attachment plate by the body plate of the same material The gist is the formation.
[0007]
The gist of a second aspect of the present invention is that, in the first aspect, a reinforcing rib is formed by bending the lower end edge of the attachment plate in the extending and / or reducing direction of the cover piece.
[0008]
The gist of the invention of claim 3 is that, in claim 1 or 2, the attachment plate is provided over the entire length with respect to the base edge of the main body plate.
[0009]
According to a fourth aspect of the present invention, in any one of the first to third aspects, the main body plate is formed in a gentle mountain shape when viewed from the extending direction, and the attachment plate is divided at a central portion of the main body plate. The present invention is summarized in that a gold plate is attached to the divided portion by welding, and the divided attachment plates are connected to each other by the gold plate.
[0010]
The gist of a fifth aspect of the present invention is that, in the fourth aspect of the present invention, a reinforcing rib is integrally formed at the lower end portion of the gold in the shrinking direction of the cover piece. The gist of a sixth aspect of the present invention is that, in the fourth or fifth aspect, a stopper that protrudes upward from the upper surface of the main body plate is integrally provided on the upper end edge of the gold plate.
[0011]
A seventh aspect of the present invention is that, in any one of the first to sixth aspects, a bracket for attaching a support shaft of a pantograph is integrally bent at the lower end edge of the attachment plate. To do.
[0012]
According to an eighth aspect of the present invention, in any one of the first to seventh aspects, side plates are formed by bending downward on the left and right side portions of the main body plate, and the side plates on the left and right side edges of the attachment plate. The gist is that a stopper protruding outward is formed.
[0013]
The gist of the invention described in claim 9 is a cover piece used for the telescopic cover according to any one of claims 1-8.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a telescopic cover embodying the present invention will be described with reference to FIGS.
[0015]
Reference numeral 11 shown in FIGS. 1 and 2 is a pair of left and right guide rails provided on a bed (not shown) of a machine tool such as a milling machine. On this guide rail 11, for example, a moving table 12 on which a processing tool is mounted is installed so as to be capable of reciprocating in the direction of the arrow in FIG. A mounting board 13 is fixed at a predetermined position of the bed, and a telescopic cover 14 is mounted between the mounting board 13 and the moving table 12, and the guide rail 11 is made of chips and coolant generated from a workpiece. It is designed to protect against liquids.
[0016]
Therefore, the configuration of the telescopic cover 14 will be described. The telescopic cover 14 is configured by connecting first to seventh cover pieces 21 to 27 so as to be extendable in the direction of the arrow in FIG. A wiper 28 to be described later is provided at the tip of the first to seventh cover pieces 21 to 27. The first to seventh cover pieces 21 to 27 are supported by the traveling mechanism 29 so as to be movable in the front-rear direction along the guide surface 11 a of the guide rail 11. The first to seventh cover pieces 21 to 27 are connected to each other by a pair of left and right pantographs 30 as shown in FIG.
[0017]
Since the first to seventh cover pieces 21 to 27 have substantially the same configuration, the configuration of the first cover piece 21 will be described with reference to FIG. 4, and the second to seventh cover pieces 22 to 22 will be described. The corresponding portions of 27 are denoted by reference symbols a to i, and detailed description thereof is omitted.
[0018]
Side plates 21b are bent downward at the left and right ends of the main body plate 21a having a flat mountain shape of the first cover piece 21. An attachment plate 21c is bent downward (inward) at the base end of the main body plate 21a. Reinforcing ribs 21d are bent at the lower end of the attachment plate 21c in the horizontal (reduction) direction. The entire height of the attach plate 21c is integrally formed of the same material as the main body plate 21a.
[0019]
A bracket 31 made of a metal material is fixed to the inner side surface of the attach plate 21c by welding. A roller 33 is rotatably supported by the bracket 31 via a shaft 32, and rolls on the guide surface 11a of the guide rail 11. The attachment plate 21c is provided with a recess 21e for avoiding interference with the roller 33. In this embodiment, the travel mechanism 29 is configured by the bracket 31, the shaft 32, the roller 33, and the like. Reinforcing ribs 21f are bent in the horizontal (extension) direction in the vicinity of the recesses 21e of the attach plate 21c. A stopper 21g is formed on the outer end portion of the first cover piece 21 so as to protrude outward from the side plate 21b.
[0020]
A retainer plate 21h, which is a component part of the wiper 28, is formed at the front end edge of the main body plate 21a by bending. Reinforcing ribs 21i are horizontally bent at the lower edge of the side plate 21b inward. A mounting plate 35 is welded to the lower surface of the reinforcing rib 21d by welding a support shaft 34 constituting the pantograph 30 downward. Crossed portions of a plurality of links 41 to 44 constituting the pantograph 30 are connected to the support shaft 34.
[0021]
As shown in FIG. 2, the main body plate 21a is formed in a gentle mountain shape as shown in FIG. 2, and the attach plate 21c is divided at the center of the main body plate 21a. An abutting piece 36 is attached to the divided portion by welding, and the divided attachment plates 21c are connected to each other by the abutting piece 36. A stopper 36a is formed on the upper edge of the metal 36, and the stopper 36a is slightly protruded from the upper surface of the main body plate 21a. A reinforcing rib 36b is bent at the lower end of the metal 36 horizontally toward the inside of the main body plate 21a.
[0022]
As shown in FIG. 1, the first cover piece 21 is fixed to the bracket 31, so the award 36 is omitted. The reinforcing rib 21f is also omitted. Further, the retainer plate 27h and the wiper 28 of the seventh cover piece 27 are also omitted.
[0023]
FIG. 5 shows a state in which the first cover pieces 21 to 27 are deployed. A cut portion S is formed at the center of each of the attachment plates 21c to 27c, so that the main body plates 21a to 27a can be bent into a gentle mountain shape. Thus, the first to seventh cover pieces 21 to 27 are bent and formed from the material press-molded into one plate. In addition, although each plate of the expansion | deployment state of the 1st-7th cover pieces 21-27 is a little different in shape and a dimension, in FIG. 5, only an example of the 1st cover piece 21 is shown.
[0024]
Next, the configuration of the wiper 28 will be described with reference to FIG.
A metal mounting substrate 51 is welded to the lower surface of the distal end portion of the first cover piece 21. A rubber lip seal 52 is attached to the mounting substrate 51 with an adhesive. The lip seal 52 is engaged with a main body 52a, a lip 52b formed integrally with the tip of the main body 52a, and a locking projection 51b formed integrally with the tip of the mounting substrate 51 so as to protrude in the reduction direction. Engaging portion 52c. Further, the lip seal 52 includes an engaging portion 52d that is engaged with a protrusion 51c that is integrally formed on the lower surface of the end portion of the mounting substrate 51 on the extending direction side.
[0025]
The tip of the lip 52b protrudes from the tip edge of the retainer plate 21h by a predetermined distance in the reduction direction. In a state before the first cover piece 21 is assembled to the second cover piece 22, the lip 52b is held away from the lower surface of the retainer plate 21h by the elastic force of the lip seal 52 itself. In the state where the first cover piece 21 and the second cover piece 22 are assembled, as shown in FIG. 6, the lip 52b contacts the lower surface of the retainer plate 21h, and the tip edge of the lip 52b is the second edge. It is pressed against the upper surface of the cover piece 22 by the elastic force of the lip 52b itself.
[0026]
Next, the operation of the telescopic cover 14 configured as described above will be described.
FIG. 1 shows a state in which the telescopic cover 14 is reduced between the movable table 12 and the mounting substrate 13. In this state, when the movable table 12 is moved in the right (extension) direction along the guide rail 11, the first to sixth cover pieces 21 to 26 are moved rightward by the action of the pantograph 30. Start moving all at once. By this movement, the first to sixth cover pieces 21 to 26 are extended rightward while shielding the guide rail 11. The roller 33 is rolled to the right along the guide surface 11a of the guide rail 11, and stably supports the first to sixth cover pieces 21 to 26 and the pantograph 30 in a horizontal state.
[0027]
When the movable platform 12 reaches the rightmost limit position, the engaging portion 52d of the lip seal 52 of the wiper 28 abuts against the metal plate 36, and the lip of a wiper (not shown) provided at the leading edge of the side plate 21b. The seal contacts the stopper 21g. Therefore, the positions of the first to seventh cover pieces 21 to 27 are restricted to the extended state.
[0028]
On the other hand, when the moving table 12 is moved toward the mounting substrate 13 from the state in which the telescopic cover 14 is extended, the cover pieces 21 to 27 of the telescopic cover 14 are reduced by an operation reverse to the above-described operation. The state shown in FIG. 1 is restored. In the operation in which the telescopic cover 14 is reduced, dust and coolant liquid adhered to the second to seventh cover pieces 22 to 27 are pushed leftward by the lip seal 42 of the wiper 28, and the cover piece It is discharged on both the left and right sides.
[0029]
According to the telescopic cover 14 of the above embodiment, the following features can be obtained.
(1) In the above embodiment, the attachment plate 21c is integrally bent with respect to the main body plate 21a. For this reason, compared with the conventional structure which welds the main body plate 21a as another member, the 1st-7th cover pieces 21-27 can be formed, without reducing mechanical rigidity. As a result, the number of parts can be reduced, manufacturing work can be easily performed, and cost can be reduced.
[0030]
(2) In the above embodiment, the reinforcing ribs 21d to 27d and the reinforcing ribs 22f to 27f are integrally bent with respect to the attachment plates 21c to 27c, so that the rigidity of the first to seventh cover pieces 21 to 27 is obtained. Can be increased.
[0031]
(3) In the above embodiment, since the bracket 31 is welded to the attachment plate 21c and the roller 33 is supported on the bracket 31, the roller 33 can be stably attached and the rigidity of the attachment plate 21c is improved. Can do.
[0032]
(4) In the above embodiment, since the abutting piece 36 is welded to the central portion of the attach plate 21c, the rigidity of the attach plate 21c can be increased.
(5) In the above-described embodiment, the retainer plate 21h is formed by bending the distal end portion of the first cover piece 21 downward in the reduction direction of the cover piece. The rear face of the lip 52b of the lip seal 52 constituting the wiper 28 is regulated with respect to the retainer plate 21h. For this reason, compared with the structure which uses a separate retainer plate, the number of parts can be reduced, manufacturing and assembling operations can be easily performed, and cost reduction can be achieved.
[0033]
(6) In the above embodiment, since the reinforcing rib 21d is formed by bending the lower end edge of the attachment plate 21c, the mounting work of the mounting plate 35 supporting the support shaft 34 can be easily performed along the reinforcing rib 21d. It can be carried out.
[0034]
In addition, you may change this embodiment as follows.
As shown in FIG. 7, a bracket 46 for attaching the support shaft 34 of the pantograph 30 to the reinforcing rib 21d may be formed integrally with the reinforcing rib 21d.
[0035]
In place of the pantograph 30, another mechanism for extending or reducing the first to seventh cover pieces 21 to 27 may be used.
The reinforcing ribs 22f to 27f may be bent inward or the reinforcing ribs 21d to 27d may be bent outward.
[0036]
【The invention's effect】
As described above in detail, the inventions according to claims 1 to 9 can reduce the number of parts of the cover piece, facilitate the manufacturing and assembling operations, and reduce the cost.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view in a reduced state showing an embodiment embodying a telescopic cover of the present invention.
FIG. 2 is a front view of the telescopic cover as viewed from the extending direction.
FIG. 3 is a plan view of a telescopic cover in a reduced state.
FIG. 4 is an enlarged perspective view showing a cover piece.
FIG. 5 is a plan view showing an unfolded state of a cover piece.
FIG. 6 is an enlarged cross-sectional view of a wiper provided at the tip of the cover piece.
FIG. 7 is a partial perspective view of a cover piece showing another example of the present invention.
[Explanation of symbols]
14 ... Telescopic cover, 21-27 ... 1st-7th cover piece, 21a-27a ... Main body plate, 21c-27c ... Attached plate, 21d-27d ... Reinforcement rib, 22g-27g ... Stopper, 30 ... Pantograph, 33 ... roller, 36 ... money, 36a ... stopper.

Claims (9)

In the telescopic cover configured to be able to extend or reduce by overlapping a plurality of cover pieces, the cover pieces are provided on the base end side of the cover piece and directed downward from the base end edge of the body plate of the cover piece. attaching plates were formed by bending inwardly the body plate integral with telescopic cover, characterized in that formed integrally on the total body of the attachment plate by the body plate of the same material. The telescopic cover according to claim 1, wherein a reinforcing rib is formed by bending a lower end edge of the attachment plate in an extending and / or reducing direction of the cover piece. 3. The telescopic cover according to claim 1, wherein the attachment plate is provided over the entire length with respect to a base end edge of the main body plate. The main body plate according to any one of claims 1 to 3, wherein the main body plate is formed in a gradual mountain shape when viewed from the extending direction, and the attachment plate is divided at a central portion of the main body plate, and the split portion is provided with an award. A telescopic cover in which the attached attachment plates separated by welding are connected to each other by the gold. The telescopic cover according to claim 4, wherein a reinforcing rib is integrally bent at a lower end portion of the gold in a reduction direction of the cover piece. 6. The telescopic cover according to claim 4, wherein a stopper projecting upward from an upper surface of the main body plate is integrally provided on an upper end edge of the metal. The telescopic cover according to claim 1, wherein a bracket for attaching a support shaft of a pantograph is integrally bent at a lower end edge of the attachment plate. The side plate according to any one of claims 1 to 7, wherein side plates are bent downward on both left and right side portions of the main body plate, and stoppers projecting outward from the side plate are formed on left and right side edges of the attachment plate. Telesco cover that has been. The cover piece used for the telescopic cover of any one of Claims 1-8.

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