JPH01153814A - Holding device of moving table - Google Patents

Abstract

PURPOSE:To reduce the number of rollers so as to aim at simplification of adjustment without any looseness by fitting a holding shaft, which has an eccentric shaft portion for having a pressure roller mounted thereto and also has a turning roller fitted thereto, to a movable body rotatably/fixably, and providing a taper rail face for the turning roller and a pressure rail face on a guide frame. CONSTITUTION:Slant portions 2 are formed on both faces of the inner bottom of a guide frame 1, rail plates 3 for forming taper rail faces 4 are inserted and fixed in these engaging grooves 2a, and also rail members 5 for forming pressure rail faces 6 are fixed to an engaging grooves 1c. Meantime, holding pieces 3a, (b) are provided under a movable body 7 and a holding shaft 9 capable of being fixed to any rotational position is fitted thereto, and the turning roller 13 for turning on the taper rail faces 4 is fitted to the holding shaft 9 and a pressure roller 16 is fitted to the top end of an eccentric shaft portion 14. A movable body 7 is driven by a timing belt 17. Accordingly, the number of rollers is reduced, looseness is eliminated and adjustment can be facilitated.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a support device for a moving table.

2. Description of the Related Art A conventional support device for a moving table includes a pair of rails/v52 on the same circular side surface of a guide frame 51 extending in the moving direction of the moving tape (V2O), as shown in FIGS. A total of 6 pairs of rollers 54, 55, and 56 are mounted on both sides of the movable body 63 of the moving tape V6O in the moving direction, each rolling along the upper surface, lower surface, and inner surface of the rail 52. A groove is formed so that a pair of cl-2- can be attached to support loads in the vertical and horizontal directions. Furthermore, a total of six rollers, the roller 54 or 65 that rolls along the upper or lower surface of the rail 62, and the roller 66 that rolls along the inner surface of the rail/L152, are attached to an eccentric shaft that can be rotated and fixed. By holding the rails 52 from above and below and pressing rollers 66 from inside against the rails 52 on both sides, the gap between the rails and the rollers is eliminated and the wobbling of the movable body 53 is eliminated. However, this method requires at least six adjustment points, which poses a maintenance problem. Therefore, we proposed the method shown in Figure 4 as a solution to the above problem. A pair of support shafts 31 having axes perpendicular to the moving direction of the movable main body 3o of the movable table are rotatably and fixedly attached to the movable main body 3o, and each support shaft is tilted in opposite directions. A tapered roller 32 having a pair of tapered transfer surfaces is rotatably mounted via a bearing 33, an eccentric shaft 34 is provided on the support shaft 31, and the eccentric shaft portion 3
4 is rotatably mounted with a suppression roller 36, and the guide frame 36 that supports the movable main body 30 is provided with a tapered saw 1v surface 37 on which the tapered roller 32 can roll, and A pressing rail surface 38 on which the pressing roller 35 rolls is provided on the opposite side to the tapered rail surface 37. With this configuration, the tapered roller 32 and the tapered rail surface receive loads in the downward and lateral directions, the suppressing roller 35 and the pressing rail surface 38 receive loads in the upward direction, and the eccentric portion 34 presses the suppression roller 36 against the pressing rail surface 38, thereby eliminating wobbling of the movable main body 30. Also,
39a is a stop shaft for positioning the support shaft 31, and 39b is a positioning sleeve for the bearing 33.

Problems to be Solved by the Invention However, in the above configuration, the taper roller and the taper
There is a problem in which the sliding resistance becomes large and pulsation occurs when the movable body is slid after rotating the support shaft and pressing the suppression roller against the suppression rail surface via the eccentric part to remove the looseness. was there.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to provide a support device for a movable table that has a small influence on the sliding of a movable body even in a state where there is no rattling.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a pair of support shafts having an axis perpendicular to the direction of movement of the movable table, which are rotatably and fixably attached to the movable body of the movable table. A roller having a transfer roller having a pair of contact points in opposite directions is rotatably mounted on each support shaft, an eccentric shaft is provided on the support shaft, and a pressure roller is rotatably mounted on the eccentric shaft. A pair of tapered rail surfaces on which the rollers roll are provided on a guide frame that is mounted and supports the movable main body, and a pair of tapered rail surfaces on which the rollers roll are provided on the opposite side of the tapered rail surface/face with respect to the axis of the support shaft. It is characterized by providing a suppression rail μ surface on which the suppression roller moves.

Effects According to the present invention, since it has the above configuration, the movable main body can be directed by a total of three pairs of rollers, each roller attached to a pair of support shafts arranged in parallel in the moving direction and a pressing roller, and the number of rollers can be increased. less. In addition, by adjusting the rotation of the support shaft and pressing the suppression roller against the suppression rail surface via the eccentric shaft, it is possible to press the roller against the tapered rail surface and prevent it from floating, and also to regulate the position in the direction of the support shaft axis. . Therefore, by simply rotating and adjusting the pair of support shafts and fixing them, the position of the movable body in two directions perpendicular to the direction of movement can be regulated to eliminate rattling, and the effort required for adjustment can be significantly reduced.

Further, since the roller and the tapered rail surface are in point contact, even if the roller is pressed against the tapered rail surface, the effect on the sliding properties of the movable body can be kept small.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 and 2.

Reference numeral 1 denotes a guide frame made of an extruded and pultruded product in the shape of a hollow body with an open top, and its side portions are separated into an inner frame 1& and an outer frame 1b.

A pair of sloped parts 2 are formed on both sides of the inner bottom of the guide frame 1 toward the outside or inside, and a tapered rail surface 4 is formed in the retaining groove 2a formed in the sloped part 2. A rail plate 3 consisting of the above is inserted and fixed. A rail material 6 made of a wear-resistant plate material forming a pressing rail surface 6 is still inserted and fixed in the engagement groove 1C formed on the lower surface of the inner frame 1a. Note that the inner frame 1a is configured to be elastically displaceable up and down. Further, the upper end of the outer frame 1b is bent inward to serve as a cover.

Reference numeral 7 denotes a movable body movable within the guide frame 1, and support pieces 8a and sb extend downward from the movable body 7.
A pair of support shafts 9 are horizontally suspended at the lower end of the . The pair of support shafts 9 are rotatable around the axis, and the support shafts 9
The support end 8a can be moved to any rotational position via a pair of bearings 11 and sleeves 12a, 12b, 12c by means of a 7 flange 9a provided in the support shaft 9 and a nut 10 combined with a threaded portion 9b provided in the support shaft 9. It is configured so that it can be fixed. Also, the sleeves 12a, 12b.

12C also regulates the position of the bearing 11.

A roller 13 that rolls on the support shaft 9 while making point contact with the tapered rail surface 4 is attached to the bearing 11.
It is rotatably attached via the

At both ends of the support shaft 9, a pressure roller 16 that rolls on the pressure rail surface 6 is rotatably mounted on an eccentric shaft portion 14 that is eccentric by 8 with respect to the axis of the support shaft 9. 16
is a cover plate that covers the bent portion of the outer frame 1b at the same height.

Reference numeral 17 denotes a timing belt as a driving means for the movable main body 7, which is wound endlessly between pulleys (not shown) disposed at both ends of the guide frame, and is fixed at appropriate points by fixing means 18. It is fixed to the movable main body 7.

Further, the bearing 11 is fixed to the roller 13 in a state in which it is in contact with a flange portion 13a of the roller 13 and a sleeve 19 that regulates the distance between the outer rings of each of the pair of bearings 11, and a side surface of the outer ring of the bearing 11. It is pressurized by the bracket 20, eliminating rattling.

In addition to the timing belt 17, the driving means may be a combination of a ball nut (not shown) and a screw shaft (not shown).

In the above configuration, when the movable body 7 is inserted into the guide frame 1 from one end and installed so that the rollers 13 roll on the tapered rail surface 4, the movable body 7 moves along the tapered rail surface 4. The support shaft 9 is movably supported, and the positioning of the support shaft 9 in the axial direction is also automatically performed. In this state, if there is a gap between the pressure roller 16 and the pressure rail surface 6 and there is a risk that the movable main body 7 may float, rotate the support shaft 13 and rotate the eccentric shaft portion 14 as it rotates.
The suppression roller 15 is pressed against the pressure rail surface 6 with the vertical displacement of , and the flange 9a provided on the support shaft 9 is
A pair of bearings 11 and a sleeve 12a,
It is fixed to the support end 8a via 12b and 12c. Then, the roller 13 is pressed against the tapered rail surface 4 by the reaction force of the pressing roller 16, and the support shaft 9 of the movable main body 7 is prevented from shifting in the axial direction and is accurately positioned. In addition, since the roller 13 and the tapered rail surface 4 are in point contact, the suppression roller 16
When pressing, the change in sliding resistance due to reaction force is kept small.

In the above embodiment, the inclined portions 2 and the tapered rail surfaces 4 formed on both sides of the central part of the inner bottom of the guide frame 1 are inclined from the inside to the outside, but in the second embodiment shown in FIG. The same effect can be obtained even if the sloped portions 22 and tapered rail surfaces 23 formed on both sides of the central portion of the inner bottom of the guide frame 21 are sloped from the outside to the inside.

Effects of the Invention According to the movable table support device of the present invention, the movable body can be supported by the eaves roller and the suppression roller attached to a pair of support shafts arranged in parallel in the moving direction, so the number of rollers is small. It's over. In addition, by adjusting the rotation of the spindle and pressing the pressure roller against the pressure roller surface via the eccentric shaft, it is possible to press the roller against the tapered rail surface and prevent it from lifting up, as well as to control the position of the spindle in the axial direction. You can also do it.

Therefore, by simply rotating and adjusting the pair of support shafts and fixing them, the position of the movable body in two directions orthogonal to the direction of movement can be regulated to eliminate rattling, and the effort required for adjustment can be reduced. ``In addition, since the roller and the tapered rail surface are in point contact, even if the roller is pressed against the tapered rail surface,
It has great effects, such as reducing the effect on the sliding properties of the movable body.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a support device for a moving table according to a first embodiment of the present invention, FIG. 2 is a partial side view taken along line A-A in FIG. 1, and FIG. 3 is a second embodiment of the present invention. FIG. 4 is a vertical cross-sectional view of the conventional second embodiment, FIG. 6 is a vertical cross-sectional view of the conventional first embodiment, and FIG. 6 shows the roller arrangement of the conventional first embodiment. FIG. 1... Guide frame, 2... Inclined part,
3...Rail plate, 4...Tapered rail surface, 6...Rail plate, e...Press rail surface, 7...Movable Main body, 8a...support end, 8b...support end, 9...support shaft,
1゜・・・nut, 11・・・bearing, 12
a...Sleeve, 12b...Sleeve, 12C...Three 7", 13...Roller, 14...Eccentric shaft portion, 16・・・・・・
Pressing roller, 16...Cover plate, 17...
...Timing belt, 18...Fixing means,
19... Sleeve, 2o... Bracket, 21... Guide frame, 22...
Inclined part, 23...Tapered rail surface. Name of agent: Patent attorney Toshio Nakao and one other person Kayo? -Fig. 5, Fig. 6, 94

Claims (1)

[Claims] A pair of support shafts having axes perpendicular to the moving direction of the moving table are rotatably and fixedly attached to the movable body of the moving table, and each support shaft is provided with a rotating shaft having a pair of contact points in opposite directions. A movable roller is rotatably mounted, an eccentric shaft is provided on the support shaft, and a pressure roller is rotatably mounted on the eccentric shaft, and a pair of rollers on which the rollers roll are mounted on a guide frame that supports the movable body. A support device for a movable table, characterized in that a tapered rail surface is provided, and a pressing rail surface on which the pressing roller rolls is provided on the opposite side of the tapered rail surface with respect to the axis of the support shaft.