JP2004232305A - Bolster laying structure of hollow rail - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hollow rail joining structure easy in installation work by securing an installation space of a sensor and the like on a side surface. <P>SOLUTION: This bolster laying structure of a hollow rail has a height adjusting bolt 2 rising from a roadbed 1, a bolster member 3 for downwardly penetrating through the height adjusting bolt 2, a fixing nut 4 fixed to the bolster member 3 and threadedly engaging with the height adjusting bolt 2, a lock nut 5 for fixing the height adjusting bolt 2 to the fixing nut 4, the hollow rail 7 for forming a longitudinally extending long groove 8 on an under surface, an insert nut 8 inserted into the long groove 6 of the hollow rail 7 and a rail fastening bolt 9 threadedly engaging with the insert nut 8 by penetrating through the bolster member 3 from below. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pillow structure of a hollow rail constituting a track for running an automatic guided vehicle (AGV) or the like.
[0002]
[Prior art]
Usually, the floors of warehouses or factories are often made of concrete, and the surface is slightly uneven. When laying a track for running an unmanned transport vehicle or the like on such a roadbed, the work is performed in the following procedure.
[0003]
That is, as shown in FIG. 4, the height adjustment bolt 2 is set up at an appropriate position on the roadbed 1 via a bottom seat 20 also serving as a thrust bearing so as to be rotatable in the circumferential direction. The height adjusting bolt 2 is screwed into a fixing nut 4 welded to the lower surface of the web 30 of the pillow member 3 made of lightweight channel steel, and the end of the height adjusting bolt 2 is projected above the web 30. . Although these operations are performed on both ends of the pillow member 3, only one end of the pillow member 3 will be illustrated and described below.
[0004]
By rotating the height adjusting bolt 2 in the circumferential direction, the height of the pillow member 3 can be adjusted. When the pillow member 3 is positioned at a desired height, the lock nut 5 is screwed into the end of the height adjustment bolt 2 protruding above the pillow member 3 and tightly tightened. Subsequently, a required number of hollow rails 102 having a long groove 101 formed on the lower surface of the hollow portion 100 are prepared. The hollow portion 100 is a top portion including an internal space having a rectangular cross section and a substantially square-shaped solid portion surrounding the internal space.
[0005]
When two hollow rails 102 (hereinafter, a and b are distinguished from each other) are joined in a row, the end ports 112 are abutted on the pillow member 3 as shown in FIG. In this process, one end of a long plate-shaped insert nut 104 having two female screws 14a and 14b formed near both ends is fitted into the long groove 101 of one hollow rail 102a. The rail fixing bolt 9a that has penetrated the pillow member 3 from below and has been introduced into the long groove 101 is screwed into the female screw 14a and tightly tightened. Thereby, one hollow rail 102 a is fixed to the pillow member 3.
[0006]
On the other hand, the other end of the insert nut 104 protruding from the end opening 112 of one hollow rail 102a is fitted into the long groove 101 of the other hollow rail 102b, and another female screw 14b at the other end of the insert nut 104 is fitted with another rail. Screw the fixing bolt 9b tightly. As a result, the other hollow rail 102b is fixed to the pillow member 3 in a posture in which the other hollow rail 102b is arranged in a straight line. Technologies similar to the above are disclosed in the following patent documents.
[0007]
[Patent Document 1]
JP 2001-212944 A
[Patent Document 2]
JP-A-7-242139
[Problems to be solved by the invention]
On the side surface of the hollow rail 102, it is necessary to secure a space for mounting various sensors for detecting the position of the automatic guided vehicle. For this reason, the hollow rail 102 must be arranged at a certain distance from the height adjusting bolt 2 and the lock nut 5 so as not to hinder the mounting of the sensors.
[0010]
However, in order to rotate the height adjustment bolt 2 in the circumferential direction, the installer inserts a tool or a finger or the like below the pillow member 3 from the end port 31 of the pillow member 3, so that as shown in FIG. If the height adjustment bolt 2 is located inside the end opening 31 (left side in the figure) with respect to the hollow rail 102, the above-mentioned tool or finger or the like becomes difficult to reach the height adjustment bolt 2, and the work is hindered. If the hollow rail 102 is arranged more inward of the pillow member 3 than the height adjustment bolt 2, the work of tightening the rail fixing bolts 9 a and 9 b is hindered by the height adjustment bolt 2.
[0011]
In the technique according to the above-mentioned Patent Document 1, a long groove downward is formed on the lower surface of the hollow portion, but the upper end of the bolt penetrates into the hollow portion. In the technique according to Patent Document 2, a bolt is inserted and fixed to the lower surface of the rail. Further, none of the techniques according to the patent documents take into account the correlation between the position of the rail and the position of the bolt for adjusting the height.
[0012]
It is an object of the present invention to provide a hollow rail pillow structure in which a mounting space for sensors and the like can be secured on a side surface and installation work is easy.
[0013]
[Means for Solving the Problems]
The present invention provides a height adjusting bolt that rises from a roadbed and is rotatable in the circumferential direction, a pillow member that penetrates the height adjusting bolt from below, and the height adjusting bolt fixed to a lower surface of the pillow member and screwed into the height adjusting bolt. A fixing nut, a lock nut for fixing the height adjusting bolt to the fixing nut, a hollow rail having a long groove extending in a longitudinal direction formed on a lower surface, an insert nut inserted into the long groove of the hollow rail, and the pillow member. The present invention relates to a pillow structure of a hollow rail including a rail fixing bolt which penetrates from below and is screwed to the insert nut.
[0014]
The feature is that the height adjusting bolt and the rail fixing bolt are arranged in a line in a longitudinal direction of the long groove, and the long groove has a wide portion into which the insert nut can be inserted, and the height adjusting bolt. And a narrow opening for introducing a rail fixing bolt into the wide portion, and a concave portion for allowing an upper end of the height adjusting bolt to escape above the insert nut, wherein the lock nut is located below the fixing nut. It is screwed to the height adjusting bolt.
[0015]
Furthermore, in the pillow structure of a hollow rail according to the present invention, the insert nut is screwed with a through hole through which the height adjustment bolt is inserted into a plate body that can be fitted into the wide portion, and the rail fixing bolt. A female screw is formed.
BEST MODE FOR CARRYING OUT THE INVENTION
A hollow rail according to an embodiment of the present invention will be described with reference to the drawings. Hereinafter, the same components as those of the related art are denoted by the same reference numerals, and description thereof will be omitted.
[0017]
As shown in FIG. 1, the pillow structure of a hollow rail according to the present embodiment includes a height adjustment bolt 2 that rises from a track bed 1 and is rotatable in a circumferential direction, and a pillow member that allows the height adjustment bolt 2 to penetrate from below. 3, a fixing nut 4 fixed to the lower surface of the pillow member 3 and screwed with the height adjusting bolt 2, a lock nut 5 for fixing the height adjusting bolt 2 to the fixing nut 4, and a long groove 6 formed on the lower surface to form an end opening. Two hollow rails 7 (the subscripts a and b are individual indices) that abut each other on the pillow member 3, an insert nut 8 fitted in each long groove 6 of the two hollow rails 7, And a rail fixing bolt 9 that penetrates the pillow member 3 from below and is screwed into the insert nut 8.
[0018]
First, the height adjusting bolt 2 and the rail fixing bolt 9 are arranged in a line in the longitudinal direction of the hollow rail 7. Secondly, the long groove 6 has a wide portion 10 into which the insert nut 8 can be inserted, a lip-shaped narrow opening 11 for introducing the height adjusting bolt 2 and the rail fixing bolt 9 into the wide portion 10, and a height adjusting bolt. 2 has a concave ridge portion 12 for allowing the end portion (upper end in the drawing) to escape to the back of the insert nut 8 (upward in the drawing). Third, the lock nut 5 is screwed to the height adjusting bolt 2 below the fixing nut 4.
[0019]
The hollow rail 7 has a top portion as a hollow portion 71 having a substantially U-shaped cross section. The internal space of the hollow portion 71 and the inside of the long groove 6 are completely separated spaces. This is because the following advantages are obtained while forming the inner space closed in the top and bottom and in the width direction at the top of the head, while minimizing the thickness of the entire hollow rail 7.
[0020]
That is, rigidity enough to withstand the load of an unmanned transport vehicle or the like full of loads can be secured at the top of the hollow rail 7, and the second moment of area of the entire hollow rail 7 can be improved. Further, the concave ridge portion 12 is not intended to allow the end of the height adjusting bolt 2 to pass through the hollow portion 71, but is a space in which the inside of the long groove 6 is expanded toward the hollow portion 71.
[0021]
The longitudinal direction of the long groove 6 of the hollow rail 7 coincides with the longitudinal direction of the hollow rail 7 itself. As the hollow rail 7, it is desirable to use a sash bar obtained by extrusion of an aluminum alloy. The cross-sectional shape of the hollow rail 1 is as shown in FIG.
[0022]
In addition, a modified hollow rail 700 shown in FIG. In the hollow rail 700, the concave streak portion 12 is a substantially U-shaped groove slightly wider than the shaft diameter of the height adjusting bolt 2 shown in FIG. In this case, in order to secure the thickness of the hollow rail 700, as indicated by reference numeral 120, the hollow rail 700 may be curved so as to expand in the vicinity of the concave streak portion 12 into the hollow portion 71. The advantage of the hollow rail 700 is that the rigidity of the whole can be further improved by the reduction in the width of the concave streak portion 12.
[0023]
Alternatively, a modified hollow rail 701 shown in FIG. The hollow rail 701 has the wide width portion 10 and the concave streak portion 12 having the same width dimension, and has opposing convex streaks 121 formed on their inner surfaces. When the insert nut 8 shown in FIG. 1 is fitted into the wide portion 10, the protrusion of the insert nut 8 from the narrow opening portion 11 is restricted by the ridge 121. An advantage of such a hollow rail 701 is that the overall thickness can be made substantially uniform.
[0024]
The insert nut 8 is formed by forming an insertion hole 13 through which the height adjustment bolt 2 is inserted and two female screws 14 into which the rail fixing bolt 9 is screwed into a steel plate that can be fitted into the wide portion 4. It is. These insertion holes 13 and female screws 14 are arranged in a row in the longitudinal direction of the insert nut 8 as shown in FIG. 3 corresponding to the arrangement of the height adjustment bolts 2 and the rail fixing bolts 9 in a row. ing.
[0025]
The pillow member 3 has bolt insertion holes 32 and 33 at positions corresponding to the insertion hole 13 of the insert nut 8 and the two internal threads 14 respectively. The bolt insertion hole 32 allows the height adjustment bolt 2 screwed to the fixing nut 4 immediately below the bolt insertion hole 32 to pass therethrough. The bolt insertion hole 33 allows the rail fixing bolt 9 to penetrate from below the web 30.
[0026]
Next, a procedure for constructing the pillow structure of the hollow rail according to the present embodiment will be described with reference to FIG.
[0027]
That is, the height adjustment bolt 2 is raised up at an appropriate place on the roadbed 1 via the bottom seat 20. After or before this operation, the lock nut 5 is screwed into the height adjusting bolt 2 and the lock nut 5 is screwed deeply to the bottom seat 20 side. Then, the shaft of the height adjusting bolt 2 is screwed into the fixing nut 4 of the pillow member 3 while rotating the height adjusting bolt 2 in the circumferential direction by, for example, pinching the shaft portion with a finger. By further screwing the height adjusting bolt 2 into the fixing nut 4, this end protrudes above the pillow member 3.
[0028]
The point where the height of the pillow member 3 is adjusted in the above state is the same as the conventional one. When the pillow member 3 is positioned at a desired height, the lock nut 21 of the bottom seat 20 is strongly tightened to the height of the height adjustment bolt 2 toward the bottom seat 20 using a spanner or the like. Thus, the height adjusting bolt 2 is fixed to the bottom seat 20. Further, the lock nut 5 is rotated so as to approach the fixing nut 4, and the lock nut 5 is pressed strongly against the fixing nut 4. Thereby, the pillow member 3 is fixed to the height adjusting bolt 2 via the fixing nut 4.
[0029]
Subsequently, a required number of hollow rails 7 are prepared. In order to join the two hollow rails 7a and 7b in tandem, the respective ends 70 are butted on the pillow member 3. In this process, both ends of the insert nut 8 are fitted into the respective wide portions 10 so that the insert nut 8 straddles the respective end ports 70 as in the related art. The end of the height adjusting bolt 2 protruding above the pillow member 3 as described above is introduced into the wide portion 10 through the narrow opening 11, and is inserted into the insertion hole 13 of the insert nut 8. Thereby, the two hollow rails 7a and 7b can be placed on the pillow member 3 in a state where the end ports 70 abut each other.
[0030]
The depth at which the end of the height adjusting bolt 2 inserted into the insertion hole 13 as described above enters the long groove 6 mainly depends on the distance from the surface of the roadbed 1 to the fixing nut 4 and the height adjusting bolt 2. It is determined by the correlation between the total length of the sheet and the actual size. For this reason, in consideration of the difference in height of the roadbed 1 and the slight difference in the dimensions of the individual height adjustment bolts 2, the end of the height adjustment bolt 2 is located at the back end of the concave strip 12 (the upper end in the figure). ), The dimension from the narrow mouth portion 11 to the deep end of the concave streak portion 12 is set so that the end portion of the height adjustment bolt 2 can escape so as not to come into contact with the height adjustment bolt 2.
[0031]
Subsequently, the two hollow rails 7a and 7b are appropriately rotated in the horizontal direction with the height adjustment bolt 2 as a fulcrum so that the bolt insertion hole 33 of the pillow member 3 and the female screw 14 of the insert nut 8 match. When the two rail fixing bolts 9 penetrate the pillow member 3 from below, the shafts are introduced into the wide portion 10 through the narrow opening 11, so that these two rail fixing bolts 9 are inserted into the insert nut. 8 are screwed into the two internal threads 14 respectively. This state is shown in FIG.
[0032]
Finally, the two hollow rails 7a and 7b can be fixed to the pillow member 3 in a posture in which the two hollow rails 7a and 7b are arranged in a straight line by firmly tightening the two rail fixing bolts 9 to the insert nut 8.
[0033]
In the above procedure, the tightening of the lock nut 5, the lock nut 21, and the rail fixing bolt 9 is performed by the builder by inserting a tool or a finger from the end port 31 of the pillow member 3, but these are all used. Since the pillow members 3 are arranged in a line in the direction crossing the pillow member 3 in the vicinity of the end opening 31, the conventional problem that another person becomes an obstacle when performing individual tightening can be avoided.
[0034]
Further, since the end of the height adjusting bolt 2 protruding above the pillow member 3 is housed in the hollow rail 7, a space for mounting sensors on the side surface of the hollow rail 7 and its vicinity can be secured. Furthermore, in addition to the end of the height adjusting bolt 2 being concealed by the hollow rail 7, the lock nut 5 is covered by the pillow member 3.
[0035]
Although the above description has mainly focused on joining the two hollow rails 7a and 7b, the middle of the one hollow rail 7 in the longitudinal direction may be fixed to the pillow member 3. In this case, an insert nut 8 is fitted in the middle of the hollow rail 7 in the longitudinal direction, and the ends of the height adjusting bolt 2 are inserted into the insertion hole 13 and the female screw 14 of the insert nut 8 and the rail fixing bolt 9. To be tightened.
[0036]
Further, it is not always necessary to screw the two rail fixing bolts 9 into the single insert nut 8, and the two rail fixing bolts 9 are screwed into two insert nuts that can be individually fitted into the wide portion 10. You may make it match. The number of rail fixing bolts 9 may be appropriately increased or decreased in consideration of the strength for fixing the hollow rail 7 to the pillow member 3.
[0037]
Further, in the above description, the long groove 6 faces downward with the hollow rail 7 fixed to the pillow member 3, but the direction or posture of the hollow rail 7 is not limited to this. The hollow rail 7 may be inclined with respect to the long groove 6 in the horizontal direction or the vertical direction.
[0038]
The present invention can be practiced in various modified, modified, and modified forms based on the knowledge of those skilled in the art without departing from the spirit of the present invention.
[0039]
【The invention's effect】
According to the pillow structure of the hollow rail according to the present invention, since the height adjustment bolts and the rail fixing bolts are arranged in a line in the longitudinal direction of the long groove, an operation of tightening one of the height adjustment bolts and the rail fixing bolts. Can be carried out without being disturbed by the other, so that the construction can be performed efficiently.
[0040]
Furthermore, the end of the height adjustment bolt is a wide portion into which an insert nut can be inserted, the narrow end for introducing the height adjustment bolt and the rail fixing bolt into the wide portion, and the end of the height adjustment bolt is an insert nut. The height adjusting bolt and the rail fixing bolt can all be introduced into the wide portion through the narrow opening of the long groove because of the cross-sectional shape having the concave streak portion which escapes upward.
[0041]
Therefore, since the end of the height adjusting bolt protruding above the pillow member is accommodated in the hollow rail, a space for mounting sensors on the side surface of the hollow rail and in the vicinity thereof can be secured. Further, in addition to the end of the height adjusting bolt being concealed by the hollow rail, the lock nut screwed to the height adjusting bolt below the fixing nut is covered by the pillow member, so that these are exposed as an external appearance. And the appearance around the pillow member is improved.
[0042]
In addition, if a plate body that can be inserted into a wide portion as an insert nut, a through hole for inserting a height adjustment bolt and a female screw for screwing a rail fixing bolt is formed, these insertion hole and female screw are formed. , Respectively, with respect to the height adjusting bolt and the rail fixing bolt, respectively. Therefore, the number of construction steps can be reduced, and the work time required for the construction can be significantly reduced.
[0043]
Further, since the hollow rail according to the present invention employs a cross-sectional shape that divides the inner space of the top of the head and the inside of the long groove, regardless of the shape of the long groove, the rigidity or the rigidity that can withstand practical use as the whole hollow rail is used. Durability can be ensured.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view and a vertical cross-sectional view showing a hollow rail and a pillow structure according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing various modifications of the hollow rail according to the embodiment of the present invention.
FIG. 3 is a perspective view showing a main part of a pillow structure of the hollow rail according to the embodiment of the present invention.
FIG. 4 is a cross-sectional view showing a conventional hollow rail and its pillow structure.
FIG. 5 is a perspective view of a conventional example of a hollow rail and a main part of a pillow structure of the hollow rail.
[Explanation of symbols]
1: Roadbed 2: Height adjustment bolt 3: Pillow member 4: Fixing nut 5: Lock nut 6: Long groove 7: Hollow rail 8: Insert nut 9: Rail fixing bolt 10: Wide section 11: Narrow opening section 12: Concave strip Part 13: insertion hole 14: female screw

Claims (2)

A height adjustment bolt that rises from the roadbed and can rotate in the circumferential direction, a pillow member that penetrates the height adjustment bolt from below, a fixing nut that is fixed to the lower surface of the pillow member and screwed with the height adjustment bolt, A lock nut for fixing the height adjustment bolt to the fixing nut, a hollow rail having a long groove extending in a longitudinal direction formed on a lower surface, an insert nut inserted into the long groove of the hollow rail, and a pillow member penetrating from below. In a pillow structure of a hollow rail including a rail fixing bolt screwed to the insert nut,
The height adjustment bolt and the rail fixing bolt are arranged in a line in a longitudinal direction of the long groove,
The elongated groove has a wide portion into which the insert nut can be inserted, a narrow opening for introducing the height adjusting bolt and the rail fixing bolt into the wide portion, and an upper end of the height adjusting bolt is positioned above the insert nut. With a concave strip to escape,
The pillow structure of a hollow rail, wherein the lock nut is screwed to the height adjusting bolt below the fixing nut. 2. The insert nut according to claim 1, wherein an insertion hole through which the height adjustment bolt is inserted and a female screw into which the rail fixing bolt is screwed are formed in a plate body that can be fitted into the wide portion. 3. Pillow bed structure with hollow rails.

Images