TWI612230B - Linear guide and its linearity adjustment method - Google Patents

Abstract

The linear guide and the linearity adjusting method of the invention can improve the linearity when the guide rail of the linear guide is installed on the base.

The guide rail 11 is temporarily fixed to the base 15, and a pair of adjustment plates 20 and 30 are mounted on the side of the guide rail 11. Insert the fixing screws 23 and 33 from the sides of the adjusting plates 20 and 30 toward the guide rail 11 so as to contact the side walls of the guide rail 11 and adjust the protruding amount of the fixing screw in a linear manner. After obtaining sufficient linearity, the guide rail 11 is fixed to the base 15.

Description

Linear guide and linearity adjusting method

The invention relates to a linear guide and a linearity adjusting method of the linear guide, which are formed by installing a guide rail in a linear manner.

A conventional linear guide is disclosed in Non-Patent Document 1 and the like. As shown in FIG. 1 and FIG. 2, the linear guide is provided with a slider 102 on the guide rail 101 so as to be able to walk in the long side direction freely, so that the slider 102 travels along the guide rail 101. At this time, the guide rail 101 is held on the base 103 shown in FIG. 3, and any member that moves linearly is mounted on the slider 102.

Non-Patent Document 1: THK, Product Information [Online], Search on December 10, 2007, Internet <URL: http: //www.thk.com/? q = jp / node / 6685>

Here, if the guide rail 101 of the linear guide is distorted and mounted on the base 103, the running track of the slider 102 will also be distorted, so it must be mounted on the base in a straight line. FIG. 4 shows an enlarged view of the guide rail 101 and a part thereof. Strictly speaking, it shows a state where the guide rail 101 is slightly distorted due to the inherent distortion of the guide rail 101 and the like, and is mounted on the base 103. When it is distorted as described above, the walking trajectory becomes non-linear. Therefore, in the past, as shown by the arrow in FIG.

For details of manual correction, firstly, as shown in the schematic diagram of FIG. 5, the mounting positions of the guide rail 101 to the base 103 are sequentially set from the end to P1, P2, and P3 ‧ ‧ ‧. then, When the guide rail 101 is mounted on the base 103, only the position P1 at the extreme end is locked with screws, and the other positions are temporarily fixed with screws. Next, a precise reference scale 104 without bending is fixed parallel to the side of the guide rail 101. Then, as shown in FIG. 5 (a), a dial gauge 105 is placed on the slider 102, and the slider 102 and the reference ruler 104 are moved at right angles to each other. Accordingly, the distance between the guide rail 101 and the reference scale 104 can be measured. Then, set the dial gauge 105 near the position P1 so that the indication of the gauge is "0", and make the slider 102 walk. As shown in FIG. 5 (b), the person appropriately presses the guide rail 101 at the position P3. On the side wall so that the indication of the gauge is "0". When the instruction value is adjusted to "0", it is temporarily fixed at the position P3. Next, as shown in FIG. 5 (c), return to the position P2 and adjust the pressure at the position P2 of the slider so that the dial gauge 105 indicates “0”, and fix it with a bolt at the position P2. Next, loosen the bolt at position P3 slightly, adjust it at position P4 in the same way, and adjust with the dial gauge 105 indicating "0".

As described above, it is necessary to make precise adjustments in order that the dial gauge indicates "0" in all positions. Therefore, not only the adjustment operation takes a lot of time, but also the problem that it is difficult to adjust correctly.

The present invention has been made in view of the above-mentioned problems, and a technical problem of the present invention is to attach a guide rail to a base in such a manner that the linearity of the guide rail can be easily improved.

In order to solve this problem, the linear guide of the present invention includes: a guide rail mounted on a base; a slider moving linearly along the guide rail; at least one adjusting plate is fixed on the side of the guide rail in a long side direction The base is provided with a plurality of thread grooves facing the guide rail; and a plurality of fixing screws are installed from the outside toward the thread grooves of the adjustment plate, and the linearity of the guide rail is adjusted by pressing a side wall of the guide rail.

Here it may also be: the adjusting plate is provided with a pair of left and right sides of the guide rail.

Here too, the fixing screws of the left and right adjustment plates are arranged at positions symmetrical to each other.

In order to solve the problem, the linearity adjusting method of the linear guide of the present invention includes a guide rail mounted on a base, a slider moving along the guide rail, and a side surface of the guide rail fixed in a long-side direction. At least one adjustment plate on the base and having a plurality of thread grooves facing the guide rail; the linearity adjustment method is to temporarily fix the guide rail to the base, and insert fixing screws into the thread grooves of the adjustment plate, respectively By pressing the side wall of the guide rail with the fixing screw to adjust the linearity of the guide rail, the guide rail is fixed to the base.

According to the present invention having the above-mentioned features, the following effects can be obtained: it is possible to easily correct the inherent distortion of the guide rails so that the linearity of the guide rails is greatly improved, and the linearity of the trajectory of the slider running on the guide rails is greatly improved.

10‧‧‧ Linear Guide

11‧‧‧rail

12‧‧‧ Slider

13‧‧‧through hole

14‧‧‧ Bolt

15‧‧‧ base

20, 30‧‧‧ Adjustment board

21, 31‧‧‧through holes

22, 32‧‧‧Thread groove

23, 33‧‧‧ set screw

FIG. 1 shows a plan view and a side view of a conventional linear guide.

FIG. 2 is a perspective view showing a conventional linear guide.

FIG. 3 is a perspective view showing a state where a conventional linear guide has been mounted on a base.

FIG. 4 is a plan view of a conventional linear guide and a partially enlarged view thereof.

Fig. 5 is a schematic diagram showing a conventional guide rail adjustment process.

FIG. 6 is a plan view showing a state where the linear guide of this embodiment has been mounted on the base.

FIG. 7 is a perspective view showing a state where the linear guide of this embodiment has been mounted on the base.

FIG. 8 is a perspective view showing an adjustment plate according to this embodiment.

FIG. 9 is an enlarged view showing a part of the linear guide of this embodiment.

FIG. 10 is an enlarged perspective view showing a part of the linear guide of this embodiment.

FIG. 6 is a plan view of a linear guide according to an embodiment of the present invention, and FIG. 7 is a perspective view thereof. The linear guide 10 of this embodiment includes a guide rail 11 and a slider 12 similarly to the conventional example. The guide rail 11 holds the slider 12 so as to be able to walk freely along the guide rail 11, and has through holes 13 at a certain distance in the center. The guide rail 11 is attached to the base 15 by using the through-hole 13 with bolts 14.

In this embodiment, as shown in FIGS. 6 and 7, the adjustment plates 20 and 30 having the same length as the guide rail 11 are mounted on the base 15 in parallel to the guide rail 11 on the left and right sides of the guide rail 11. As shown in FIG. 8, the adjustment plate 20 is a flat plate-shaped long member and has the same length as the guide rail 11. A plurality of through-holes 21 are provided in the center of the adjustment plate 20 at the same distance as the through-holes of the guide rail, and the through-holes 21 are fixed to the base 15 by screwing. In addition, it is preferable that the threaded grooves 22 are penetrated at a certain distance from the side and at a right angle to the through-holes at an intermediate position of the through-holes 21 so as not to cross the through-holes 21. A fixing screw 23 is attached to each of the screw grooves 22 from the outside toward the side of the guide rail 11. When the adjustment plate 20 is mounted on the base 15, the front end of the fixing screw contacts the left side surface of the guide rail 11.

The adjustment plate 30 also has the same shape as the adjustment plate 20, and is provided with through holes 31 in the longitudinal direction, and further provided with thread grooves 32 at a certain interval from the side. On the adjusting plate 30, the front end of the fixing screw from the right side of the guide rail contacts the right side of the guide rail 11. The fixing screws 23 and 33 are objects that press the sides of the guide rail 11 from both sides. Here, since the position of the thread groove is close to the upper surface of the base 15, a headless screw is used.

In addition, when the linear guide 10 is provided, it passes through the through hole 13 through the bolt 14 The guide rail 11 is mounted on the base 15. At this time, the bolts 14 are temporarily fixed. Then, a pair of adjustment plates 20 and 30 are fixed to the base 15 through the through holes at a certain interval from the upper side by bolts on the left and right sides of the guide rail 11. Next, the fixing screws 23 and 33 are inserted from the side of the adjustment plates 20 and 30 toward the guide rail 11 from the thread grooves 22 and 32 so that the front ends thereof contact the side walls of the guide rail 11. FIG. 9 is an enlarged view showing details of the left and right adjustment plates, guide rails, and bolts, and FIG. 10 is a perspective view thereof. As shown in the drawings, the front ends of the fixing screws are brought into contact with the left and right side walls of the guide rail 11. This contact position is set to the exact middle position where the guide rail 11 is fixed to the base.

In this state, the above-mentioned dial gauge is arranged on the slider 13 so that the dial gauge contacts the reference scale and moves, and it is confirmed whether the trajectory of the slider is straight. When the slider 12 does not move in a straight line, because the guide rail 11 is bent, the fixing screws 23 and 33 of the left and right adjustment plates 20 and 30 are loosened or tightened to correct the bending to adjust the protruding amount of the fixing screws. 11 Make corrections in a straight line. After the linearity of the guide rail 11 is adjusted as described above, the guide rail 11 is fixed to the base 15 surely. This makes it possible to easily improve the linearity of the linear guide 11.

In addition, since the left and right adjustment plates 20 and 30 are used for linear adjustment of the guide rail 11, they can also be taken out after the adjustment is completed. However, if the correction state of the twist cannot be ensured by removing the fixing screw, it is preferable to mount the adjustment plates 20 and 30 to the base 15 while maintaining the original state.

In this embodiment, the adjustment plates 20 and 30 are provided on the left and right sides of the base 15 and the guide rails 11, but the adjustment plates may be provided only on one side of the guide rails.

In addition, in this embodiment, although the left and right adjustment plates 20 and 30 are pressed at the same position perpendicular to the longitudinal direction by the fixing screw to press the guide rail 11 to adjust the linearity of the guide rail 11, the contact position of the fixing screw can be staggered from left to right .

The present invention can be applied to various machines that require high linearity for linear guides, for example Such as the moving mechanism of the monitor camera of the breaking device and other widely used.

11‧‧‧rail

14‧‧‧ Bolt

15‧‧‧ base

20, 30‧‧‧ Adjustment board

23, 33‧‧‧ set screw

Claims (4)

A linear guide is characterized in that it includes: a guide rail mounted on a base; a slider moving linearly along the guide rail; at least one adjusting plate fixed on the side of the guide rail and fixed to the base in a long side direction There are a plurality of thread grooves facing the guide rail; and a plurality of fixing screws are installed from the outside toward the thread grooves of the adjusting plate toward the guide rail, and the linearity of the guide rail is adjusted by pressing the side wall of the guide rail. For example, the linear guide of the first scope of the patent application, wherein the adjusting plate is provided with a pair of left and right sides of the guide rail. For example, the linear guide of the second patent application range, wherein the fixing screws of the left and right adjustment plates are arranged at positions symmetrical to each other. A linearity adjusting method for a linear guide, the linear guide is provided with: a guide rail mounted on a base; a slider moving along the guide rail; and at least one adjusting plate fixed on a side of the guide rail in a long side direction The base has a plurality of thread grooves facing the guide rail; the linearity adjustment method is characterized by temporarily fixing the guide rail to the base; inserting fixing screws into the thread grooves of the adjusting plate; The fixing screw presses the side wall of the guide rail to adjust the linearity of the guide rail; and fixes the guide rail to the base.