JP2014214808A - Underseal and linear guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent an underseal from coming off.SOLUTION: An underseal 1 of a linear guide device can be removed from an underseal groove in a state where a bearing block is assembled into a guide rail; comprises only an elastic material capable of being attached to the underseal groove; and has at least one long projection part 4 provided in parts 3a1, 3b1 of the side surfaces of end parts 3a, 3b inserted and held to the underseal groove so as to extend in an insertion direction and contact with the side surface of the underseal groove.

Description

  The present invention relates to an under seal of a linear guide device and a linear guide device including the same.

Patent Document 1 discloses an under seal of a linear guide device and a linear guide device including the same.
First, as disclosed in Patent Document 1, generally, a linear guide (linear motion guide) device 10 includes a guide rail 20, a bearing block 30, and a rail provided on the guide rail 20, as shown in FIG. A rolling element (ball) 40 interposed between the side rolling groove 21 and the bearing block side rolling groove 31 provided in the bearing block 30 is provided.

  In this type of linear guide device 10, ball rows are arranged on both sides of the central axis of the guide rail 20, and the rolling elements (balls) 40 are composed of the guide rail side ball groove 21 and the bearing block side ball groove. 31, a direction change path (not shown) provided in the end cap 50, and a circulation path 32 provided in the bearing block 30, so as to circulate infinitely.

In the linear guide device 10, an under seal 60 is provided between the guide rail 20 and the bearing block 30 in order to ensure oil tightness and suppress contamination of foreign matters.
Here, both ends of the under seal 60 are inserted and held in unshown under seal grooves provided in the end cap 50.
Next, the under seal 60 disclosed in Patent Document 1 will be described with reference to FIG. Here, in FIG. 17, the shape of the under seal 60 shown in the lower left is the shape of the under seal 60 in plan view, and the shape of the under seal 60 shown in the upper left is the under seal viewed from the short side direction of the under seal 60. The shape of the under seal 60 shown on the right is the shape of the side surface of the under seal 60 viewed from the long side direction of the under seal 60.

  The under seal 60 is composed only of a resin material such as elastomer or plastics. As shown in FIG. 17, a lip portion 61 abutting against the guide rail 20 and both end portions of the under seal are end caps. And a holding portion 62 inserted and held in the groove. Here, the end portion of the holding portion 62 constitutes insertion portions 62a and 62b to be inserted into the under seal groove of the end cap.

The under seal 60 is provided with a substantially cylindrical convex portion 63 at the end portions (insertion portions) 62a and 62b of the holding portion 62 inserted into the under seal groove of the end cap. Corresponding to the shape of the under seal, the under seal groove of the end cap is provided with a concave portion that can be engaged with the convex portion 63 of the under seal 60.
Next, a method for attaching the above-described under seal 60 to the bearing block 30 will be described with reference to FIGS. 18 (a) and 18 (b).

  First, when the under seal 60 is attached to the bearing block 30 assembled to the guide rail 20, the insertion portion 62a on one end side of the under seal 60 is connected to the bearing block 30 side adjacent to the end cap 50 (FIG. 18). Inserted into the corresponding under seal groove 50a from the direction of arrow A shown in FIG.

Next, the under seal 60 is bent downward in the vicinity of the center as shown in FIG. 18B, and the insertion portion 62 b on the other end side of the under seal 60 is moved to the bearing block 30 side adjacent to the end cap 50. From the direction of the arrow B shown in FIG. 18B, it is inserted into the corresponding under seal groove 50a.
When the under seal 60 is removed from the bearing block 30 assembled to the guide rail 20, the under seal 60 is bent downward as shown in FIG. The insertion portions 62a and 62b of the under seal 60 are extracted.

As described above, since the under seal 60 disclosed in Patent Document 1 is composed only of a resin material such as elastomer or plastics, a desired sealing property can be ensured and the bearing block 30 can be secured. Even in the state assembled to the guide rail 20, the insertion portions 62a and 62b of the under seal 60 can be easily and quickly inserted into or removed from the corresponding under seal groove 50a.
And the under seal | sticker 60 currently disclosed by patent document 1 can aim at drop-off prevention by providing the substantially cylindrical convex part 63 in the insertion part 62a, 62b of the holding | maintenance part 62. As shown in FIG.

JP 2007-303620 A

However, there is a possibility that the drop of the under seal 60 cannot be reliably prevented only by the substantially cylindrical convex portion 63 of the under seal 60 disclosed in Patent Document 1.
The present invention has been made in view of the above-described problems, and an object of the present invention is to reliably prevent the under seal from dropping off.

  In order to solve the above problems, an under seal of a linear guide device according to claim 1 of the present invention includes a guide rail, a bearing block that is movably disposed on the guide rail via a rolling element, An end seal disposed at both ends of the bearing block, wherein the end seal is inserted and held in an under seal groove provided in the corresponding end cap. The seal between the guide rail and the bearing block can be removed from the under seal groove and attached to the under seal groove when the bearing block is assembled to the guide rail. Consists of only elastic material that can A side surface portion of the end that is passing the holding and the projecting portion of the elongated contact with the side surface of the under seal groove extending in the insertion direction, characterized in that provided at least one.

According to a second aspect of the present invention, the under seal of the linear guide device according to the first aspect of the present invention is an under seal of the linear guide device according to the first aspect, wherein the end portion of the linear guide device is inserted and held in the under seal groove. In addition, a convex portion that fits into the concave groove provided in the under seal groove is provided.
According to a third aspect of the present invention, a linear guide device includes the under seal according to the first or second aspect.

  According to the under seal of the linear guide device according to claim 1 of the present invention, the protrusion provided on the under seal is a long protrusion that extends in the insertion direction and contacts the side surface of the under seal groove. The contact area between the convex portion and the end cap is widened, the friction with the end cap can be increased, and the holding ability of the under seal against the bearing block can be increased.

Moreover, according to the under seal of the linear guide device according to claim 2 of the present invention, since the convex portion provided in the under seal fits into the concave groove provided in the under seal groove, the holding ability of the under seal with respect to the bearing block is increased. Can be higher.
Further, according to the linear guide device according to claim 3 of the present invention, since the holding ability of the under seal with respect to the bearing block is high, for example, securing of oil tightness and suppression of mixing of foreign matters are made more reliable. be able to.

It is a top view which shows the structural example of the under seal | sticker of this embodiment. It is a side view of the under seal seen from the direction of arrow C shown in FIG. It is a side view of the under seal seen from the direction of arrow D shown in FIG. It is side surface sectional drawing which shows the relationship between the under seal in the state in which the under seal was attached to the bearing block, and an end cap. It is a top sectional view showing the relation between the under seal and the end cap in a state where the under seal is attached to the bearing block. It is a plane sectional view showing the under seal which provided the convex part of a substantially cylindrical shape in the insertion part of a holding part. It is a top view which shows the other structural example of an under seal. It is a side view of the other structural example of an under seal. It is a side view of the other structural example of an under seal. It is a top sectional view showing a relation between an under seal and an end cap in a state where an under seal of another configuration example is attached to a bearing block. It is a top view which shows the other structural example of an under seal. It is a side view of the other structural example of an under seal. It is a side view of the other structural example of an under seal. It is a top sectional view showing a relation between an under seal and an end cap in a state where an under seal of another configuration example is attached to a bearing block. It is a figure which shows the evaluation result in an Example. It is a figure which shows the structural example of a general linear guide (linear motion guide) apparatus. It is a figure which shows the structure of the under seal currently disclosed by patent document 1. FIG. It is a figure explaining the method of attaching the under seal currently disclosed by patent document 1 to a bearing block. It is a top view which shows the modification of an under seal. It is a side view of the modification of an under seal. It is a side view of the modification of an under seal. It is a plane sectional view showing the relation between an under seal and an end cap in a state where a modified under seal is attached to a bearing block.

Embodiments of the present invention will be described below with reference to the drawings.
This embodiment is an under seal to which the present invention is applied.
1-3 is a figure which shows the structural example of the under seal | sticker 1 of this embodiment. 1 is a plan view, FIG. 2 is a side view seen from the direction of arrow C shown in FIG. 1, and FIG. 3 is a side view seen from the direction of arrow D shown in FIG.

The under seal 1 is formed only of a resin material such as an elastomer or plastics, and has a substantially flat plate shape as a whole as shown in FIGS. Specifically, the underseal 1 has a substantially curved cross-sectional shape and a lip part 2 that is in contact with the guide rail, and a substantially flat plate shape, and both ends thereof are inserted into the underseal groove of the end cap and held. Holding part 3. The insertion portions 3a and 3b, which are the end portions of the holding portion 3 inserted into the under seal groove of the end cap, have convex portions 4 on one side surface (surface facing upward in FIG. 2) 3a1 and 3b1 in the thickness direction. (Hatching portions shown in FIGS. 1 to 3) are provided.

The convex portion 4 has a convex shape extending along the longitudinal direction on one side surface 3a1, 3b1 of the insertion portions 3a, 3b of the holding portion 3. That is, the convex part 4 is formed as a long rectangular column member lying in the insertion direction of the insertion part 3a, 3b into the under seal groove with respect to the one side surface 3a1, 3b1 of the insertion part 3a, 3b of the holding part 3. Has been.
The under seal 1 is attached to a bearing block of a linear guide (linear motion guide) device as shown in FIG.

Next, a state where the above-described under seal 1 is attached to the bearing block will be described.
4 and 5 are views showing a relationship between the under seal 1 and the end cap 50 in a state where the under seal 1 is attached to the bearing block. Here, FIG. 4 shows a side sectional view, and FIG. 5 shows a plan sectional view.
As shown in FIGS. 4 and 5, in a state where the under seal is attached to the bearing block, the convex portion 4 is accommodated in the under seal groove 50 a of the end cap 50 together with the insertion portions 3 a and 3 b of the under seal 1. . That is, the insertion portions 3a and 3b of the under seal 1 of the under seal 1 are inserted into the under seal groove 50a so that the convex portions 4 provided on one side surface 3a1 and 3b1 are sandwiched between the inner surface of the under seal groove 50a. It is supported.

And since the convex part 4 is not a mere columnar shape like the past, but is a long quadrangular prism shape lying on the side surfaces 3a1 and 3b1 of the insertion portions 3a and 3b of the holding part 3, the under seal 1 The contact area between the convex portion 4 and the end cap 50 is widened, the friction with the end cap 3 can be increased, and the holding ability with respect to the bearing block can be increased.
6 shows an under seal 60 in which a substantially cylindrical convex portion 63 is provided in the insertion portions 62a and 62b of the holding portion 62, as disclosed in Patent Document 1. As shown in FIG.

As shown in FIG. 6, since the contact area between the convex portion 63 and the end cap 50 is smaller than in the case of the present embodiment, the friction between the under seal 60 and the end cap 50 can be obtained by the present embodiment. It cannot be raised to the extent possible.
As mentioned above, although embodiment of this invention was described, this invention is not limited to this, A various change and improvement can be performed.

For example, in the present embodiment, the convex shape is not limited to the aforementioned shape. 7 to 9 are diagrams showing examples thereof.
As shown in FIGS. 7 to 9, in the present embodiment, a plurality of convex portions 5 a and 5 b can also be provided in the respective insertion portions 3 a and 3 b of the holding portion 3.
Accordingly, as shown in FIG. 10, the under seal 1 has a larger contact area between the plurality of convex portions 5 a and 5 b and the end cap 3, so that the friction with the end cap 3 can be further increased.

Moreover, in this embodiment, it is not limited to providing a convex part only in one side surface 3a1, 3b1 of each insertion part 3a, 3b of the holding | maintenance part 3. FIG. FIGS. 11 to 13 are diagrams showing examples thereof.
As shown in FIGS. 11-13, in this embodiment, it is further convex on the longitudinal side surface (the side surface facing the insertion direction of the under seal 1 with respect to the under seal groove 50a) of each insertion part 3a, 3b of the holding unit 3. 6 can also be provided. Corresponding to the convex portion 6 of the under seal 1, a concave portion in which the convex portion 6 can be fitted is provided in the under seal groove 50 a of the end cap 50.

  Thereby, as shown in FIG. 14, the under seal 1 has a larger contact area between the convex portions 4 and 6 and the end cap 3, and furthermore, the convex portion 6 becomes a concave portion 50b of the under seal groove 50a. Since it fits, the retention capability with respect to a bearing block can be made higher.

Moreover, in the modification of this embodiment, it is not limited to providing a convex part only in one side surface 3a1, 3b1 of each insertion part 3a, 3b of the holding | maintenance part 3. FIG. 19 to 22 are diagrams showing examples thereof.
As shown in FIGS. 19-21, the convex part 4 is not a mere columnar shape like the past, but the triangular prism shape provided in one side surface 3a1, 3b1 of the insertion part 3a, 3b of the holding | maintenance part 3. As shown in FIG. The triangular prism is inclined toward the under seal groove 50a. Since the triangular prism is elastically deformed, the under seal 1 is inserted into the under seal groove 50a.

  The contact area between the triangular apex of the convex portion 4 and the upper surface of the under seal groove 50a of the end cap 50 can be widened to increase the friction with the end cap 3 and to increase the holding ability to the bearing block. it can.

Next, examples will be described.
In the example, the height h of the convex portion shown in FIG. Further, as a comparative example, an under seal having a convex portion having a substantially cylindrical shape was used. FIG. 15 shows the verification result.
As shown in FIG. 15, compared to the comparative example, in the case of the present embodiment, the long quadrangular prism-shaped protrusions did not drop off or were difficult to drop off. In addition, in both the present embodiment and the modified example, when the convex portion is increased, the end cap is deformed.

1 Under seal 2 Lip part 3 Holding part 3a, 3b Insertion part (end part)
4,5a, 5b, 6 Convex part

Claims (4)

An under seal of a linear guide device including a guide rail, a bearing block that is movably disposed on the guide rail via a rolling element, and end caps that are disposed at both ends of the bearing block. And each end is inserted and held in an under seal groove provided in the corresponding end cap, and seals between the guide rail and the bearing block.
In a state where the bearing block is assembled to the guide rail, the bearing block is composed of only an elastic material that can be removed from the under seal groove and attached to the under seal groove.
A linear guide device characterized in that at least one long convex portion extending in the insertion direction and in contact with the side surface of the under seal groove is provided on a part of the side surface of the end portion inserted and held in the under seal groove. Under seal.   2. The linear guide device according to claim 1, wherein a convex portion that fits into a concave groove provided in the under seal groove is provided on a side surface facing an insertion direction of an end portion inserted and held in the under seal groove. Under seal.   A part of the side surface of the end portion inserted and held in the under seal groove is provided with at least one triangular convex portion that extends in the insertion direction and contacts the upper surface of the under seal groove. The under seal of the linear guide apparatus of Claim 1 or Claim 2.   The linear guide device according to claim 1, further comprising the under seal.

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