JPS644883Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a linear guide device, particularly to an improvement in its dustproof structure.

The above-mentioned linear guide device is a device in which a saddle-shaped sliding table is placed on a long track rail extending in the axial direction via a large number of rolling balls, and the rolling of the balls is prevented. The slide table is adapted to move linearly on the track rail via the slider. Usually, the track rail is arranged in a fixed position on the base.
To explain this using FIG. 1, the track rail 10 is
It is attached and fixed to the base 14 by bolts 12 inserted through insertion holes 16 from the lower surface side of the base 14 and screwed onto the track rail 10. A large number of balls 18 are rotatably interposed between the track rail 10 and the sliding table 20, and the sliding table 20 is equipped with the balls 18.
It is designed to move linearly on the track rail 10 through the rolling motion of the rollers.

In this conventional example, there is a restriction that the installation work of the track rail 10 must be done from below the base 14 using the bolts 12, so there is a drawback that workability is extremely poor, and it is impossible to provide the insertion holes 16. There were many cases.

In another conventional technique, as shown in FIG. 2, the track rail 10 is tightened with bolts 12 and fixed to a base 14 whose position is fixed. Specifically, the track rail 10 has a small diameter hole 22.
A large diameter hole 24 is provided, the depth of the large diameter hole 24 is made deeper than the height of the head 26 of the bolt 12, and the small diameter hole 22 is provided with a male threaded portion 32 of the bolt (hexagon socket head bolt) 12. is inserted, and its tip is screwed into the female screw hole 34 of the base 14.

In this case, it is desirable to close the opening of the large diameter hole 24 with a flat circular lid 28 made of synthetic resin or the like. If there is a recess near the entrance of the large diameter hole 24, wear powder, dirt, etc. will accumulate in this recess, making it impossible to prevent foreign objects from getting caught in the rolling part of the ball. It is from.

However, as shown in FIG. 3, if there are variations in the depth of the large-diameter holes 24 formed at predetermined intervals in the longitudinal direction of the track rail 14, or if there are variations in the plate thickness of the lid 28, for example, Even if the lid 28 is used, the surface of the lid 28 will sink from the top surface (sliding base) 36 of the track rail 14, creating a recess near the entrance of the large diameter hole 24, and the seal 31 will catch foreign objects. I couldn't avoid putting it away.

The present invention solves the above-mentioned drawbacks of the prior art, namely, provides a linear guide device that has excellent workability during installation, completely dustproofs the slider, and allows smooth operation of the slider. It was done for that purpose.

In order to achieve the above purpose, in this invention,
A straight groove capable of accommodating the head of a bolt is formed on the upper surface of the track rail over the entire length of the track rail, and a dustproof member is attached to the opening (entrance) of the straight groove.

Hereinafter, embodiments of the present invention will be described in more detail with reference to FIGS. 4 to 8.

As shown in FIG. 4, the track rail 50 has a generally H-shaped cross section as a whole and is formed by drawing. Specifically, the upper and lower linear grooves 52 and 54 have a substantially trapezoidal cross section, and near the shoulder of the upper linear groove 52, a pair of linear recesses 56 having a semicircular cross section are located opposite each other. is formed. A plurality of bolt insertion holes 64 are formed at predetermined intervals in the intermediate portion. Also, both sides 6
6 and 68, ball rolling grooves 72 and 74 are formed in two stages in the vertical direction. Each rolling groove has a so-called gossic arch shape.

As shown in FIG. 5, the dustproof member 80 is made of a suitable synthetic resin, has a flat rectangular cross section, and is provided with a pair of protrusions 82 to fit into the recess 56 of the upper straight groove 52. ing.

Further, the sliding table 100 has a saddle shape, and the hanging part 10
A straight groove 102 (only one is shown) is formed in the upper and lower sides of both inner surfaces of the ball 6, and a ball circulation hole 108 is formed in the hanging portion 106. A seal 110 is fixed to one end surface of the sliding table 100.

Attach the track rail 50 of this embodiment to the base 84,
When fixing, insert the hexagon socket head bolt 90 into the bolt insertion hole 64, and tighten the male threaded part 92.
This is done by screwing into the female screw hole 86 of the base 84.
At this time, the depth of the upper straight groove 52 is equal to the depth of the bolt 90.
Since the height of the bolt head 94 is selected to be considerably deeper than the height of the bolt head 94, the upper surface of the bolt head 94 does not protrude above the upper surface of the track rail 50. The dustproof member 80 is
The protrusion 82 is elastically deformed and engaged with the recess 56 provided in the elongated opening of the straight groove 52 for installation.

In this way, the dustproof member 80 has no steps in its longitudinal direction, that is, in the axial direction of the track rail 50, so when the slide table 100 slides on the track rail 50, its sliding properties are not affected. , no abnormal noises are generated. If the straight groove 52 or the dustproof member 8
Even if a slight step is created between the top surface of the track rail 50 and the top surface of the dustproof member 80 due to manufacturing errors of It has almost no effect.

Note that the dustproof member 80 can be manufactured at low cost by drawing, and if a long one is prepared, it can be cut into a required length for use. If it is okay even if the dustproof performance is somewhat poor, use multiple dustproof members 80.
Since it is only necessary to connect them together, materials can be used effectively without wasting them. When removing the track rail 50, use an appropriate tool to disengage the protrusion 82 of the dustproof member 80 from the recess 56 of the linear groove 52, and remove the dustproof member 80 from the track rail 50.
You will need to loosen the bolt 90 after removing it from the
Since the dustproof member 80 is entirely formed into a single plate, it can be removed in one operation. Conventionally, this includes a plurality of circular lids 28 (second
This results in a significant reduction in labor and time compared to having to repeatedly remove and remove the parts (see figure) over and over again.

Furthermore, since the linear ball rolling grooves 72 and 74 for storing the balls 96 are formed in two rows, one above the other, on the vertical side surfaces 66 and 68, dirt may not accumulate in these ball rolling grooves. There is almost no dust, and together with the prevention of dust from entering the ball rolling groove 52 by the dustproof member 80, the dust prevention is perfect. In addition,
By making the clearances between the balls 96 and the ball rolling grooves 72, 74 slightly different on the upper and lower sides, when the load applied to the slide table 100 is small, one of the balls 96 (upper or lower) will have a larger clearance. At this time, both balls 96 can bear the load.

In addition, in this embodiment, the track rail 50 is
The reason for the shape of the cross section is that when the recess is made by drawing, if only one side of the material is used, the flow of the structure inside the material will not be uniform, and deformation will easily occur during heat treatment. H
In addition to the manufacturing advantages mentioned above, the shaped cross-section also reduces the amount of material required and thereby reduces the weight of the track rail.

Other embodiments of the present invention will be sequentially described below. In the second embodiment shown in FIG. 6, a dustproof member 110 is composed of a trapezoidal or rectangular main body portion 112 that is fitted into a linear groove 52, and a pair of projecting portions 114 extending laterally from the trapezoidal or rectangular main body portion 112. . The projecting portions 114 are placed on the upper surfaces of the shoulder portions 88 on both sides of the linear groove 52 of the track rail 50, and their upper surfaces are flush with the upper surface of the main body portion 112.

The basic operation and effects of this embodiment are the same as those of the first embodiment, but in addition, the track rail 5
Another advantage arises from the fact that the entire upper surface of 0 is covered with a dustproof member 110, that is, a synthetic resin material. That is, by appropriately changing the plate thickness of the dustproof member 110 and selecting a predetermined size of the gap between the upper surface of the dustproof member 110 and the sliding table 100 (see FIG. 5), the sliding table 100
When the load applied to the dustproof member 110 is large, the dustproof member 110 and the sliding table 100 actively come into sliding contact with each other and bear part of the load.

In the third embodiment shown in FIG. 7, the dustproof member 120 is made of a thin synthetic resin plate, and has right-angled bent portions 122 formed on both sides thereof. A corresponding notch 124 is formed in the shoulder portion of the track rail 50.

The dustproof member 120 has a bent portion 122 with a notch 124.
By inserting the dustproof member 120 into the track rail 50, the dustproof member 120 is attached to the track rail 50 with some elasticity, making it easy to attach and remove the dustproof member 120. Note that it may be fixed using an adhesive if necessary. In this embodiment as well, substantially the same effects as in the second embodiment (FIG. 6) can be obtained.

In the fourth embodiment shown in FIG. 8, the dustproof member 130 is a plate-shaped member manufactured by pressing a metal plate, and both sides thereof are curved inward to form engaging portions 132. The track rail 50 is correspondingly formed with a recess 134 in its shoulder.

The dustproof member 130 is attached to the track rail 50 by expanding the engaging portion 132 outward and engaging it in the recess 134, but in this way, when using screws, adhesive, etc. In comparison, the effort and time required to attach and detach the dustproof member 130 can be reduced. Furthermore, since the entire upper surface of the track rail 50 is covered with a metal plate, the track rail 50 and the slide table 100 come into sliding contact via the metal plate 130, and the coefficient of friction is reduced. Improves sliding properties. Furthermore, there is also an advantage that the dustproof member 130 does not deteriorate even when used at high temperatures.

It should be noted that the present invention should not be construed as being limited to the above-mentioned embodiments, and it goes without saying that modifications may be made as appropriate without departing from the spirit of the invention. That is, the specific shape and material of the dustproof member 80, the track rail 5
It is possible to improve the method of attachment to 0 as necessary.

As described above, according to the present invention, the track rail can be easily attached to and removed from the base, and dust can be prevented from accumulating around the track rail and mounting bolts, allowing the sliding platform to move smoothly. A linear guide device that moves in a straight line can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a front (partial sectional) view showing one example of the prior art, FIG. 2 is a front sectional view showing another example of the prior art, and FIG. 3 is a side sectional view. FIG. 4 is a front sectional view showing the first embodiment of the present invention, FIG. 5 is a perspective view of the dustproof member, and FIGS. 6, 7, and 8 are the second, third, and third embodiments of the present invention, respectively. FIG. 4 is a front sectional view showing a fourth embodiment. Explanation of symbols of main parts, 50...Track rail,
52... Straight groove, 80... Dust-proof member, 84... Base, 90... Bolt, 100... Sliding base.

Claims (1)

[Claims for Utility Model Registration] 1. A track rail extending in the axial direction is tightened and fixed to a fixed position base with bolts, and a sliding base is attached to the track rail via a large number of freely rolling balls. In the linear guide device mounted so as to be movable in a straight line, the track rail has a linear groove extending in the longitudinal direction formed at least on its upper surface, and the head of the bolt is accommodated in the linear groove and has a male threaded portion. penetrates the track rail and is screwed onto the base, and a dustproof plate extending in the longitudinal direction is attached to the opening of the linear groove. 2. The linear guide device according to claim 1, wherein the track rail has a linear groove extending in the longitudinal direction also formed on its lower surface, and the track rail has a substantially H-shaped cross section. 3. The dustproof plate is made of synthetic resin and has a flat trapezoidal cross section, and engagement projections are formed on both sides thereof, and corresponding recesses are formed in the straight groove. A linear guide device according to claim 1 of the utility model registration claim.