JP2009062745A - Rail fixing device and rail fixing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rail fixing device capable of flexibly responding to both the height difference and twist of a reference surface. <P>SOLUTION: This rail fixing device 100 for fixing a rail 4 as a track for a track vehicle comprises: a base 110 fixed to the reference surface; a plurality of jack bolts 130 vertically installed on the base 110 at multiple positions, respectively; a mounting plate 120 having a plurality of insertion holes 121 allowing the jack bolts 130 to be inserted therethrough, respectively, and detachably having the rail 4; a plurality of spherical washers 140 vertically holding the mounting plate 120 with the jack bolts 130 inserted therethrough; and nuts 150 adding a holding force for holding the mounting plate 120 to the spherical washers 140 and fixing the spherical washers 140 to the jack bolts 130. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rail fixing device for fixing a rail which is a track of a tracked carriage and a rail fixing method.

  2. Description of the Related Art Conventionally, a cart that automatically transports luggage in a warehouse or factory, especially a cart that transports heavy objects, often travels on rails. The rail is fixed by a rail fixing device that is directly attached to the ground or the floor surface with an anchor bolt, a rail fixing device that is attached to an I-shaped steel laid on the floor, or the like. The rail fixing device is disposed at a predetermined interval in the length direction of the rail.

  The floor surface and I-type steel laid on the floor often have waviness or warpage in the length direction (specifically, straightness ± 15 mm, height difference ± 20 mm), and the rail In order to make it horizontal in the length direction, a shim is sandwiched between the rail fixing device and the floor or I-shaped steel to finely adjust the level of the rail.

  However, when a shim is used to adjust the height of the rail, a gap between the shims may be missed. In this case, when the carriage actually rides on the rail and a load is applied to the rail fixing device, the gap existing between the shims disappears, resulting in a situation where the level of the rail is out of order.

On the other hand, Patent Document 1 describes a rail fixing device in which screw holes extending in the vertical direction are provided at both ends. This rail fixing device employs a mode in which a bolt is attached to the screw hole of the rail fixing device from below and the head of the bolt is fixed to a reference plane. If such a rail fixing device is employ | adopted, the space | interval of the head of a bolt and a rail fixing device can be adjusted by turning a volt | bolt with respect to a rail fixing device. That is, the distance between the reference surface on which the bolt head is fixed and the rail fixing device can be easily adjusted.
Japanese Utility Model Publication No. 4-33701

  However, in the case of a rail fixing device that adjusts the height of the rail using jack bolts, as the carriage passes on the rail, the vibration generated in the carriage increases, and the nut provided in the rail fixing device has a certain period of time. Since it loosens after a while, it is necessary to periodically tighten the nut.

  Conventionally, it has been considered that the loosening of the nut is caused by vibrations generated when the carriage travels because the levelness (level difference, straightness) of the rail is poor.

  Therefore, the inventors of the present application have made extensive efforts and researches to find out the cause of loosening of the nut. The cause of the loosening of the nut is as follows.

  That is, the floor surface and the I-shaped steel not only have a height difference in the length direction of the rail, but also include an inclination that can be placed in the width direction of the rail, that is, a twist. For example, type I steel includes a twist of about ± 2 °. Therefore, when the torsion generated on the floor surface or the top surface of the I-shaped steel is adjusted with the bolts of the rail fixing device, there is always a member arranged obliquely with respect to the bolts. That is, even if the member is fastened with a nut that is screwed onto the bolt, the nut and the member are in a spotted state, and the frictional force is reduced. It has been found that when such a situation occurs, the fixing strength of the member decreases, and the nut easily loosens due to vibrations generated during traveling of the carriage.

  Therefore, the present inventor has further researched and found a rail fixing device that can avoid loosening of the nut.

  The invention of the present application was obtained as a result of the above research, and it is possible to avoid loosening of the nut that maintains the rail height as much as possible while being a rail fixing device that can adjust the height using jack bolts. An object of the present invention is to provide a possible rail fixing device.

  In order to achieve the above object, a rail fixing device according to the present invention is a rail fixing device that fixes a rail that is a track of a tracked carriage, and includes a substrate fixed to a reference surface, and a plurality of locations on the substrate. A plurality of jack bolts erected, a plurality of insertion holes through which the jack bolts can be inserted, a mounting plate to which the rail is detachably attached, and the jack bolts being inserted from above and below, A plurality of spherical washers that clamp the mounting plate, and a plurality of nuts that apply a clamping force to clamp the mounting plate to the spherical washer and fix the spherical washer to the jack bolt at a predetermined height. Prepare.

  As a result, the mounting plate is attached to the jack bolt via the spherical washer, so that even if the jack bolt and the mounting plate are deviated from the vertical state, the clamping force generated by tightening the nut is all surfaced. It becomes possible to transmit by contact.

  Therefore, the frictional force of the joint portion can be maintained in a high state, and even when vibration is applied to the rail fixing device, it is possible to avoid loosening of the nut due to vibration as much as possible.

  According to the present invention, it is possible to suppress the vibration of the carriage traveling on the rail and to prevent the nut from loosening that maintains the height of the rail.

  Next, an embodiment of a rail fixing device according to the present invention will be described.

  FIG. 1 is a perspective view showing a part of an automatic warehouse to which a rail fixing device is applied.

  The automatic warehouse shown in FIG. 1 is a warehouse in which articles are automatically loaded and loaded on a rack 2 by a stacker crane 1 as a tracked carriage, and are automatically unloaded. And a station 3 on which goods are placed at the time of loading and unloading.

  FIG. 2 is a side view schematically showing the automatic warehouse.

  The stacker crane 1 includes a casing formed by connecting a lower carriage 11 and an upper carriage 12 with a mast 13, and a configuration in which a lifting platform 16 moves up and down along the mast 13 is adopted.

  The rack 2 is a shelf for storing articles.

  The lower carriage 11 is a portion serving as a drive source for moving the stacker crane 1 in the horizontal direction, and travels on the rail 4 as a track of the stacker crane 1 laid on the upper surface of the I-shaped steel 200 as a reference plane. For this purpose, a wheel 14 for driving and a traveling motor 15 for driving the wheel 14 are provided.

  The mast 13 is a structure that serves as a foundation for the elevator 16 to move up and down. The mast 13 guides the winch motor 17 for raising and lowering the elevator 16, a wire rope 19 that suspends the elevator 16, and the wire rope 19. And a sheave 18.

  The elevator 16 is a device that moves up and down in a state where the article is placed, and carries the article into and out of an arbitrary position of the rack 2, and includes a slide fork 20 that conveys the article in the horizontal direction. .

  In the stacker crane 1, the length of the mast 13 reaches several tens of meters, and the article placed on the lifting platform 16 may be heavy. Therefore, the rail 4 on which the stacker crane 1 travels must be horizontal in the traveling direction, and the levels of the two rails 4 must match and be parallel. Furthermore, it is necessary to attach the rail 4 so that it does not twist with respect to the length direction.

  FIG. 3 is a view showing an attachment mode of the rail fixing device to the I-shaped steel.

  As shown in the figure, a large number of rail fixing devices 100 are attached at predetermined intervals in the length direction of the I-shaped steel 200.

  The height of the rail 4 with respect to the surface of the I-shaped steel 200 is determined by individually adjusting the rail fixing device 100 on which the rail 4 is placed. Accordingly, the level of the rail 4 in the length direction (Y direction in the figure) can be obtained.

  Moreover, the rail fixing device 100 can cancel the inclination (X direction in the figure) of the I-shaped steel 200, and can make the rail parallel to the Y direction in the figure. Details thereof will be described later.

  FIG. 4 is a cross-sectional view showing a state where the rail fixing device is attached to the I-shaped steel.

  As shown in these drawings, the rail fixing device 100 is a device for fixing a rail 4 as a track of the stacker crane 1 to an I-shaped steel 200 having a reference surface on the upper surface, and includes a substrate 110, a mounting plate 120, Jack bolt 130, spherical washer 140, and nut 150 are provided.

  The substrate 110 is a member that is fixed to a reference surface that is the upper surface of the I-shaped steel 200, and includes a narrow bolt nut 111 for attaching the substrate 110 to the I-shaped steel 200, and a clamper 112. Moreover, the board | substrate 110 and the clamper 112 are each provided with the hole 113 which can insert the narrow bolt nut 111 at a time.

  From the above, the substrate 110 is inclined in the Y direction following the twist of the I-shaped steel 200.

  The jack bolt 130 is a male screw that is erected on the substrate 110 and maintains the distance between the substrate 110 and the mounting plate 120. The jack bolt 130 is screwed into a female screw provided on the substrate 110 and is welded to the substrate 110 to be integrally fixed to the substrate 110. The jack bolt 130 is attached perpendicularly to the substrate 110.

  As described above, the jack bolt 130 is inclined to follow the twist of the I-shaped steel 200.

  The attachment plate 120 is a plate-like member to which the rail 4 is attached, and includes an insertion hole 121 through which the jack bolt 130 is inserted.

  The insertion hole 121 has a diameter that allows the jack bolt 130 to be inserted into the mounting plate 120 even when the jack bolt 130 is inclined ± 2 ° from the vertical.

  The rail fixing device 100 includes a clip 125 for attaching the rail 4 to the attachment plate 120. The clip 125 is inserted into the jack bolt 130 and presses the rail 4 against the mounting plate 120 using a force with which the nut 150 clamps the mounting plate 120.

  5A and 5B are diagrams showing a spherical washer, in which FIG. 5A is a top view and FIG. 5B is a front view.

  The spherical washer 140 includes a first washer 141 having a convex partial spherical surface 145 and a second washer 142 having a concave partial spherical surface 145 corresponding to the partial spherical surface 145. The first washer 141 and the second washer 142 are slidable with respect to each other along the abutting partial spherical surface 145. Further, the first outer surface 143 of the first washer and the second outer surface 144 of the second washer 142 are parallel when the axis of the first washer 141 and the axis of the second washer 142 coincide.

  The nut 150 is a member that is screwed into the jack bolt 130 and clamps the mounting plate 120 via the spherical washer 140.

Next, a method for fixing the rail 4 using the rail fixing device 100 will be described.
FIG. 6 is a sectional view showing a state in which the rail fixing device is attached to a twisted portion of the I-shaped steel.

  First, the substrate 110 is placed on the upper surface of the I-shaped steel 200, and the clamper 112 is brought into contact with the lower part of the protruding portion of the I-shaped steel 200. Then, the protruding portion of the I-shaped steel 200 is sandwiched between the substrate 110 and the clamper 112 by the narrow bolt nut 111.

  As described above, the substrate 110 is fixed to the reference surface of the I-shaped steel 200. As shown in FIG. 6, when the upper surface (reference surface) of the I-shaped steel 200 is inclined with respect to the horizontal, the substrate 110 is also fixed in an inclined state following the inclination (substrate fixing step).

  Next, the nut 150 is screwed onto the jack bolt 130 that is erected vertically from the substrate 110. Since the jack bolt 130 is fixed perpendicularly to the mounting plate 120, the jack bolt 130 is inclined from the vertical according to the inclination of the mounting plate 120. Therefore, the position where the nut 150 is screwed is a position where the mounting plate 120 supported by the nut 150 can be disposed at a position where the height difference in the length direction (Y direction in FIG. 3) of the I-shaped steel 200 is offset. In addition, this is a position where the torsion of the I-shaped steel 200 (inclination in the X direction in FIG. 3) can be offset and the mounting plate 120 can be kept horizontal.

  Next, the spherical washer 140 is inserted into the jack bolt 130 and placed on the screwed nut 150. Then, the jack bolt 130 is inserted into the insertion hole 121 of the mounting plate 120, and the mounting plate 120 is mounted to the jack bolt 130 (mounting step).

  Next, the rail 4 is placed on the mounting plate 120, the nut 150 is rotated with respect to the jack bolt 130, and the rail 4 on the mounting plate 120 becomes horizontal in the length direction (Y direction in FIG. 3). The height of the mounting plate 120 is adjusted so as to be horizontal in the width direction (X direction in FIG. 3) (adjustment step).

  Next, the spherical washer 140 is inserted into the jack bolt 130, the clip 125 is inserted, the nut 150 is screwed into the jack bolt 130, and then the nut 150 screwed into the jack bolt 130 is rotated and tightened. As a result, the mounting plate 120 is fixed to the jack bolt 130 at a predetermined height while being sandwiched between the spherical washers 140 (a clamping and fixing step).

  At the same time, the tip of the clip 125 presses the lower protrusion of the rail 4 toward the mounting plate 120 to fix the rail 4 to the mounting plate 120.

  FIG. 7 is a view showing a portion where the spherical washer sandwiches the mounting plate. In the figure, the clip 125 is omitted.

  As shown in the figure, the mounting plate 120 is fixed horizontally with respect to the jack bolts 130 that are inclined from the vertical. Further, the second outer surface 144 of the second washer 142 is in surface contact with the mounting plate 120. The first washer 141 and the second washer 142 are in contact with each other at a partial spherical surface 145 although they are slightly shifted. Further, the nut 150 screwed into the jack bolt 130 is in contact with the first outer surface 143 of the first washer 141 on the surface.

  As described above, although the jack bolt 130 and the mounting plate 120 are in a tilted relationship, all portions where the clamping force of the mounting plate 120 being clamped by the nut 150 is transmitted are in contact with each other. Therefore, even if the frictional force of the contact portion is high and vibration is transmitted to the clamping portion by traveling of the stacker crane 1, it is possible to maintain a high clamping force without the nut 150 being loosened.

  Further, if the inclination degree of the jack bolt 130 and the mounting plate 120 is within a predetermined range, the spherical washer 140 can be displaced and absorb this inclination, so that the I-shaped steel 200 is twisted in various states. However, it is possible to cancel this and keep the mounting plate 120 horizontal.

  In addition, even if the positional relationship of the 1st washer 141 and the 2nd washer 142 is arrange | positioned up and down, there can exist the same effect.

  FIG. 8 is a diagram showing another aspect of the spherical washer.

  As shown in the figure, even if the first washer 141 is integrated with the nut 150 and the second washer 142 is integrated with the mounting plate 120 in the spherical washer 140, the same effect as described above can be obtained. is there.

  In this case, the number of parts of the rail fixing device 100 can be reduced.

  FIG. 9 is a diagram showing another aspect of the spherical washer.

  As shown in the figure, the second washer 142 may be integrated with the mounting plate 120.

  In this case, the clip 125 or the like can be sandwiched between the nut 150 and the first washer 141.

  In the present embodiment, the upper surface of the I-shaped steel 200 has been described as the reference plane. However, the reference plane can be any surface such as a floor surface.

  The present invention can be used when fixing a rail which is a track of a tracked carriage.

It is a perspective view which shows a part of automatic warehouse to which a rail fixing device is applied. It is a side view which shows an automatic warehouse typically. It is a figure which shows the attachment aspect with respect to I-type steel of a rail fixing device. It is sectional drawing which shows the state which attached the rail fixing device to the I-shaped steel. It is a figure which shows a spherical washer, (a) is a top view, (b) is a front view. It is sectional drawing which shows the state which attached the rail fixing device to the twisted part of I-shaped steel. It is a figure which shows the part which the spherical washer clamps the attachment plate. It is a figure which shows another aspect of a spherical washer. It is a figure which shows another aspect of a spherical washer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stacker crane 2 Rack 3 Station 4 Rail 11 Lower trolley 12 Upper trolley 13 Mast 14 Wheel 15 Motor 16 Lifting base 17 Winch motor 18 Sheave 19 Wire rope 20 Slide fork 100 Rail fixing device 110 Substrate 111 Bolt nut 112 Clamper 113 Hole 120 Installation Plate 121 Insertion hole 125 Clip 130 Jack bolt 140 Spherical washer 141 First washer 142 Second washer 143 First outer surface 144 Second outer surface 145 Partial spherical surface 150 Nut 200 I-shaped steel

Claims (2)

A rail fixing device for fixing a rail which is a track of a tracked carriage,
A substrate fixed to the reference surface;
A plurality of jack bolts erected at a plurality of locations of the substrate;
A plurality of insertion holes through which the jack bolts can be inserted, and a mounting plate to which the rail is detachably attached;
In a state where the jack bolt is inserted, a plurality of spherical washers that sandwich the mounting plate from above and below,
A rail fixing device including a plurality of nuts that apply a clamping force to clamp the mounting plate to the spherical washer and fix the spherical washer at a predetermined height with respect to the jack bolt. A rail fixing method for fixing a rail which is a track of a tracked carriage,
A substrate fixing step for fixing the substrate to the reference surface;
The nut is screwed into a plurality of jack bolts erected at a plurality of locations on the substrate, a spherical washer is inserted, and an insertion hole having a position corresponding to the jack bolt is inserted, so that the rail is detachably attached. A mounting plate mounting step for mounting the mounting plate to the jack bolt;
A rail is placed on the mounting plate, the nut screwed first is rotated with respect to the jack bolt, and a spherical washer is placed so that the rail is horizontal in the length direction and horizontal in the width direction. An adjustment step for adjusting the height of each part of the mounting plate that comes into contact;
A rail fixing method including a clamping and fixing step of inserting a spherical washer through the jack bolt, screwing a nut, rotating the nut with respect to the jack bolt, and fixing the mounting plate with the spherical washer.

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