JPH0722870B2 - Cover device that protects the sliding surface - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a cover device that protects a sliding surface of a fixed base that supports a movable base so as to be slidable in the front-rear direction from coolant, chips, falling abrasive grains, and the like. , Especially like the wheel head of a cylindrical grinder,
A cover device for protecting a slide surface suitable for use with a movable table which approaches the front end of the slide surface or partially exceeds the front end in the most advanced position.

[Prior art]

A cover device for protecting a sliding surface of this type has a structure in which two covers pivotally mounted on a movable table and a fixed table are slidably engaged with each other to move as shown in Japanese Utility Model Publication No. 52-21676. There is one in which the two covers overlap in a substantially vertical state when the platform is most advanced. According to this, since the overhang of the cover device is reduced, it is possible to obtain an advantage that other members can be arranged close to each other.

[Problems to be solved by the invention]

However, in such a conventional technique, since the length of each cover increases as the sliding stroke of the moving table increases, the depth of the space provided on the front side of the fixing table for accommodating the cover device increases, and the fixing device is fixed. There is a problem in that the bed supporting the table needs to be deeply scooped, which lowers the rigidity of the bed. The present invention solves this problem by providing three covers and an attitude maintaining mechanism that holds the intermediate cover at a predetermined position.

[Means for solving problems]

To this end, the cover device for protecting the slide surface according to the present invention is formed on the upper surface of the fixed base 11 and supports the movable base 13 so as to be slidable in the front-rear direction, as illustrated in the accompanying drawings. In the cover device for protecting the above, the first cover 20 pivotally supported around the left-right axis on the front part of the fixed base 11 and the first cover 20 pivoted around the left-right axis on the front end part of the movable base 13. With respect to both the fixed base 11 and the movable base 13, the third cover 22 that projects toward the cover 20, the second cover 21 that is provided in contact with the upper surface of the first cover 20 and the lower surface of the third cover 22, Has a supporting member 42 that is movable in the front-rear direction and that moves in conjunction with the moving base 13, and the second cover 21 is pivotally supported about the axis in the left-right direction by the supporting member 42 so that the second cover Position between the third covers 21 and 22 where these covers 21 and 22 always overlap It is characterized in further comprising a position maintaining mechanism 40 for holding.

[Action]

When the movable table 13 is in the rearmost retracted position, the front part of the second cover 21 overlaps with the upper surface of the rear part of the first cover 20, and the second cover 21
The front surface of the third cover 22 is superposed on the rear upper surface of the third cover 22, and the slide surface 12 is protected by the three covers 20, 21, 22. Mobile platform
If 13 moves forward, the third cover 22 moves forward together with it, and the second cover 21 held by the posture maintaining mechanism 40 also moves 13
Advance in conjunction with the advance of. When the movable base 13 reaches the most advanced position, the covers 20, 21, 22 are rotated around each pivot axis in a state where all three covers 20, 21, 22 are overlapped to become almost vertical, and the fixed base is fixed.
Stored in front of 11. When the movable table 13 is retracted again from this state, the second and third covers 2 are operated by the action opposite to the above.
1,22 retreat. Since the second cover 21 is supported by the support member 42 that moves in conjunction with the movable table 13, no gap is created between the covers 20, 21, 22 during the above operation.

〔The invention's effect〕

According to the present invention, since three covers are used,
The length of each cover is shorter than the sliding stroke of the moving table, and therefore the depth of the space to store each cover provided on the front side of the fixed table is small, which is sufficient. It is shallow and does not reduce the rigidity of the bed. Further, since the second cover is held by the posture maintaining mechanism having the support member that moves back and forth in conjunction with the moving table, it can be pivotally supported without a gap between the first cover and the third cover. The sliding surface can be reliably protected.

〔Example〕

 Hereinafter, embodiments will be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a bed 10 such as a cylindrical grinder.
The movable table 1 is mounted on the fixed table 11 fixed on the upper surface through a slide surface 12 including a flat slide surface 12a and a V slide surface 12b.
3 is slidably supported in the front-rear direction (left-right direction in FIG. 1). A transverse feed table 15 is provided via a slide surface 14 on the upper surface of the rising portion provided on the front end side (left side in FIG. 1) of the bed 10 with the cutout portion 10a therebetween. The moving table 13 supports a grinding wheel (not shown) which is rotationally driven about a lateral axis, and grinds a workpiece on the lateral feed table 15. In addition, the scooping part 10a
A gutter 16 for receiving the coolant used for grinding the workpiece and guiding it to the discharge path is provided therein.

As shown in FIG. 1, a portion of the slide surface 12 located in front of the movable table 13 is a first cover 20 pivotally supported around the left-right axis on the front part of the fixed table 11, and a rear part thereof has a posture described later. A second cover 21 pivotally supported about the left-right axis by the maintenance device 40 and a front portion thereof overlaps the first cover 20, and a rear portion is pivotally supported on the front end of the movable table 13 about the left-right axis and the front portion is second. Cover 21
It is covered by a third cover 22 which overlays the top.

As shown in FIG. 1, the first cover 20 is composed of an arc-shaped front plate 20a and left and right side plates 20b respectively covering the front upper side and both sides of the front part of the fixed base 11, and is located in the left-right direction near the center of the arc. The first support shaft 30 is pivotally supported on both sides of the front part of the fixed base 11. A tension spring 50 is provided in a recessed groove 11a provided in the front-rear direction slightly above the first pivot 30 on both sides of the fixed base 11, and its front and rear ends are fixed to both side plates 20b and the fixed base 11, respectively. It is locked to 50a and 50b. As a result, the first cover 50 is biased in the clockwise direction about the pivot 30, and when the movable table 13 shown in FIG. 1 is retracted, the inner surface of the bent portion 20d at the lower end is fixed to the lower part of the front surface of the stationary table 11. The stopper plate 24 is positioned by abutting the tip of the bent portion 24a of the stopper plate 24. In this state, the bent flange 20c formed on the upper end of the first cover 50 is located almost directly above the first pivot 30.

As shown in FIGS. 1 and 2, the fixed base 11 is provided with one pair of left and right posture maintaining mechanisms 40, 40 located on both sides of the slide surface 12 for pivotally supporting the second cover 21. ing. Each posture maintaining mechanism 40 has a guide member 41 fixed to both sides of the upper surface of the fixed base 11 and having guide grooves 41a along the front-rear direction, and a support member 42 slidably supported by the guide grooves 41a. The front end portion of 42 has a large vertical width to form a step portion 42a. A tension spring 43 is provided between a pin 43a at the rear end of the support member 42 and a pin (not shown) at the rear portion of the guide member 41 to bias the support member 42 rearward, and in the state shown in FIG. The step portion 42a is a guide member 4
Positioned in contact with the front end of 1. Between the front end portions of the left and right support members 42, as shown in FIGS. 1 and 3,
A second pivot 31 in the left-right direction that pivotally supports the second cover 21 is provided. When the movable table 13 moves forward from the rearmost retracted position shown in FIG. 1 by a predetermined distance, the groove portion 45a on the front surface of the interlocking block 45 fixed to the movable table 13 contacts the second pivot 31 (see FIG. 5). When the movable table 13 further advances, the support member 42 is pulled out from the guide member 41 against the tension spring 43 (see FIG. 6).
Like The interlocking relationship between the structure of the posture maintaining mechanism 40 and the movable table 13 in this embodiment is as described above.

The second cover 21, as shown in FIG. 1 and FIG.
A metal fitting 21c, which is composed of a and left and right side plates 21b and fixed to the left and right rear portions, is inserted through and supported by the second pivot 31 described above, and is held by the posture maintaining mechanism 40. A tension spring 51 is stretched between the lower edges of the side plates 21b and the pins 51a and 51b fixed to both side surfaces of the fixed base 11, respectively, whereby the second cover 21 is centered on the second pivot 31. In the state shown in FIG. 1, the front end of the upper plate 21a is biased counterclockwise, and the front end of the upper plate 21a is the upper plate 2 of the first cover 20.
It is superposed and abutted on the upper rear side of 0a. Further, in this state, the front portions of the both side surfaces 21b are overlapped with the rear portions of both side plates 20b of the first cover 20.

As shown in FIGS. 1 and 2, a support block 33 is fixed to the front surface 13a of the moving table 13, and support portions 34 are provided at both ends of the support block 33 so as to project to the front. The interlocking block 45 described above is fixed. Third cover
The reference numeral 22 denotes an upper plate 22a and both side plates 22b, and a support portion 3 via a boss 22c fixed to the rear left and right and a third pivot 32 in the left and right direction.
It is pivotally supported by 4. A tension spring 52 is stretched between the side plates 22b and the pins 52a and 52b fixed to the left and right of the movable base 13, respectively, whereby the third cover 22 is attached counterclockwise about the third pivot 32. In the state shown in FIG.
The front end of 22a is overlapped and abutted on the upper rear portion of the upper plate 21a of the second cover 21, and the front portions of both side plates 22b are overlapped on the outer sides of the rear portions of both side plates 21b of the second cover 21.

As shown in FIGS. 1 and 2, the movable table 13 has a fixed cover.
23 is fixed. The fixed cover 23 is composed of an upper plate 23a and both side plates 23b along the outer periphery of the movable table 13, and the upper plate 23a is a support block with a rear edge of an auxiliary cover 25 made of a flexible sheet such as rubber or synthetic resin interposed therebetween. 33 is screwed to the upper surface to cover the upper rear portion of the upper plate 22a of the third cover 22, and the side plates 23b are overlapped with the rear outer sides of the side plates 22b of the third cover 22. The auxiliary cover 25 extends forward along the upper plates 22a, 21a and front plates 20a of the covers 22, 21, 20 and its front edge is fixed to the bent portion 20d at the lower end of the first cover 20. The pin 52b that locks the tension spring 52 is provided on both side plates 2 of the fixed cover 23.
It is fixed to 3b.

Next, the operation of the present embodiment will be described. In the state of FIG.
The covers 20, 21, and 22 are continuously polymerized, and each front plate 20a and upper plate 21
The slide surface 22 is protected by a, 22a and side plates 20b, 21b, 22b. If the movable table 13 moves forward from this state, the third cover 22 moves forward together with the movable table 13, but until the interlocking block 45 comes into contact with the second pivot 31, the first and second covers 20, 21.
Does not move, the upper plate 22a of the third cover 22 slides forward on the upper plate 21a of the second cover 21, and gradually and deeply overlaps. The third cover 22, which is biased by the tension spring 52, pivots in the counterclockwise direction about the third pivot 32 by this sliding.

As shown in FIG. 5, after the third pivot 32 passes slightly above the second pivot 31 and the interlocking block 45 comes into contact with the second pivot 31, the second cover 21 is almost entirely polymerized. The upper plate 21a of the second cover 21 slides forward on the front plate 20a of the first cover 20 and gradually overlaps with the third cover 22. Due to this sliding, the second and third covers 21 and 22 rotate counterclockwise about the respective pivots 31 and 32 and approach the vertical direction.

As shown in FIG. 6, when the front surface 13a of the movable table 13 (particularly the downwardly projecting portion which engages with the V slide surface 12b shown in FIG. 2) is in contact with the flange 20c of the first cover 20, ~ The third covers 20, 21, 22 are almost entirely polymerized. If the movable table 13 moves further forward, the first cover 20 is pushed by the movable table 13 and
The second and third covers 21 and 22 simultaneously rotate in the counterclockwise direction about the axis 30 and rotate in the same direction.
In the state shown in FIG. 4 in which the front surface 13a of the cover has reached the most advanced position beyond the front end of the slide surface 12, the covers 20, 21, 22 are almost completely overlapped with each other and become almost vertical, and the cutout portion 10a is formed. It is stored inside. The overall height of each of the covers 20, 21, 22 in this state is smaller than the sliding stroke of the moving table 13, and the forward protrusion is also small.

The structure of the posture maintaining mechanism 40 is not limited to the above-described embodiment, and the support member 42 may be provided on the moving base 13 so as to be slidable in the front-rear direction. Also, the interlocking relationship with the movable table 13 is not limited to the one that stops in the first half of the sliding stroke and moves in the latter half as in the present embodiment, and
Any mechanism can be used as long as it provides an interlocking relationship between the first and third covers 20 and 22 so as to keep them in a position where they always overlap with both covers 20 and 22.

[Brief description of drawings]

The attached drawings show an embodiment of a cover device for protecting a sliding surface according to the present invention, and FIG. 1 is a side sectional view of a movable table in a rearmost retracted state and corresponds to a sectional view taken along the line II of FIG. The figure is a front view of the right half taken along the line II-II in FIG.
FIG. 3 is a partial sectional view taken along line III-III in FIG.
Figures are equivalent to Figure 1, Figure 5 and Figure 6 in the most advanced state.
The figure is a partial side cross-sectional view of the main part in a state where the vehicle has moved forward part way. Explanation of code 11 …… Fixed base, 12 …… Slide surface, 13 …… Mobile base, 20…
… First cover, 21 …… Second cover, 22 …… Third cover,
40: Posture maintaining mechanism, 42: Support member.

Claims (1)

[Claims] 1. A cover device for protecting a slide surface which is formed on the upper surface of a fixed base and slidably supports a movable base in the front-rear direction. The cover device is pivotally supported by a front portion of the fixed base around a horizontal axis. 1 cover, a third cover pivotally supported on the front end portion of the movable table about the left-right axis and projecting toward the first cover, and provided in contact with the upper surface of the first cover and the lower surface of the third cover. A second cover and a support member that is movable in the front-rear direction with respect to both the fixed base and the movable base and that moves in conjunction with the movable base. A cover device for protecting a sliding surface, which is provided with a posture maintaining mechanism for pivotally supporting the second cover between the first and third covers in a position where the second cover and the both covers always overlap with each other.