JPS59177294A - Device for maintaining attitude of travelling beam in overhead travelling crane - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a posture maintaining device for a traveling girder in an overhead crane. By connecting the gears that mesh with each other by a rotating shaft installed on the running girder and rotating both gears together, the left and right parts of the running girder can be moved at the same speed and the same distance with respect to the left and right rails. By moving the girder, the attitude of the running girder relative to the rail or other fixed object is always maintained the same.

In a conventional overhead crane, a traveling girder equipped with a hoisting device and wheels travels along both left and right parallel rails with the wheels engaged with each of the parallel rails. However, with conventional overhead cranes, there are problems such as variations in the performance of the motors individually connected to the left and right wheels, backlash of the transmission gear, and slippage between the wheels and the rails. The running speed of the wheels relative to the rail.

This may cause discrepancies in mileage. Then, the running girder no longer intersects perpendicularly with the left and right rails when viewed from above, which not only causes problems such as twisting of the wheels engaged with the rails, but also causes the running girder to become continuous in a straight line with the running girder. In the case of an overhead crane that has a fixed girder end face and the hoisting device can move from the running girder to the fixed girder, the end face of the running girder will not stop at the correct position, so it is necessary to correct the misalignment between the running girder and the fixed girder. As a result, there is also a problem that the winding device cannot move between the two folds.

This invention was made by focusing on such conventional problems, and its purpose is to move the left and right parts of the running girder at the same speed and the same distance with respect to the left and right rails. Moreover, the purpose is to maintain the same attitude of the running girder with respect to the rail or other fixed objects at all times.

That is, as in the illustrated embodiment, a traveling girder 2 equipped with a hoisting device 1 is installed on left and right parallel rails 3, and an overhead crane 4 traveling along the rails 3, etc. A row of protrusions 6 consisting of a large number of protrusions 5 arranged at intervals is installed along both rails 3, and on the running girder 2,
A rotating shaft 7 extending in a direction perpendicular to both protrusion rows 6 when viewed from above is installed, and two gears 8 that rotate together with the rotating shaft 7 are attached to the rotating shaft 7, and both gears 8 are attached to both protrusion rows 6 individually. The specified invention is a posture maintaining device for a traveling girder in an overhead crane, which is characterized in that the traveling girder 2 with the hoisting device 1 is installed on the left and right parallel rails 3. In the overhead crane 4 traveling along
A protrusion row 6 consisting of a large number of protrusions 5 arranged at equal intervals is installed along both rails 3, and the running girder 2 has a rotating shaft 7 extending in a direction orthogonal to both protrusion rows 6 when viewed from above. Bearing 9
Two gears 8 that rotate together with the rotating shaft 7 are attached to the rotating shaft 7, and both gears 8 are individually meshed with both protrusion rows 6, and between the bearing 9 and the running girder 2. The combined invention is an apparatus for maintaining the attitude of a traveling girder in an overhead crane, characterized in that an elastic body 10 is interposed to urge the gear 8 in the direction of pressing the protrusion row 6.

Next, the present invention will be explained based on illustrated embodiments.

1 and 2 show a warehouse 11 using an overhead crane 4. Two parallel rails 3 are installed in the central part of the ceiling 12 of the warehouse 11 in the longitudinal direction, and a hoisting device 1 is installed. A running girder 2 is constructed on parallel rails 3 and is configured to run along the rails 3. The traveling girder 2 is provided with two girder rails 13 extending in a direction perpendicular to both rails 3 when viewed from the plane and parallel to each other. This 2
A hoisting device 1 is provided on a book girder rail 13 so that it can run. On the outside of each of the left and right rails 3, a large number of horizontal fixed rails 14 are installed along the ceiling 12, facing in the same direction as the girder rails 13, and the end surfaces of the fixed rails 14 on the rail 3 side are attached to the end surfaces of the girder rails 13. located in opposite positions. Warehouse 11 floor 1
A beam 16 protrudes from the upper surface of the vehicle 5, forming a so-called reverse beam structure, and cargo 17 to be handled by the overhead crane 4 is placed on the floor 15.

Details of the overhead crane 4 are shown in FIG. 3 and below. The traveling girder 2 of the overhead crane 4 has two parallel girder rails 13.
and a saddle 18 made of a planar rectangular frame member fixed to the left and right ends of the girder rail 13, and the side girder rails 13 are connected by a belly member 19 to form a truss shape in the plane.

The saddle 18 is provided with a drive shaft 20 and a driven shaft 21 that engage with the rail 3, and a drive motor 22 fixed to the saddle 18 is connected to the drive shaft 20.

A row of projections 6 is attached to the lower surface of the rail 3 along the longitudinal direction of the rail 3. The protrusion row 6 has a large number of protrusions 5 arranged at equal intervals. As shown in FIG. 5, the protrusion row 6 is made of a chino, and the protrusion 5 is made of a chino roller. Further, as for the protrusion row 6, ranks may be used as shown in FIG. In this case, the rank tooth is protrusion 5.
to do.

A rotating shaft 7 is installed parallel to the traveling girder 2, and the rotating shaft 7 is supported by bearings 9 provided in the saddle 18 and the bracket 23 fixed to the girder rail 13, respectively. The rotary shaft 7 is made up of three shafts connected by joints 24, and one of the two joints 24 has a structure that allows the connection angle of the rotary shaft 7 to be changed and set, so that the relative relationship between the two gears 8, which will be described later, can be changed. The angle and the angle of the gear 8 with respect to the protrusion row 6 can be finely adjusted. Gears 8 are attached to the rotating shaft 7 at respective positions corresponding to both protrusion rows 6. The gear 8 is attached movably relative to the rotating shaft 7 in the axial direction and integrally with the rotating shaft 7 in the rotating direction. Although the rotating shaft 7 and the gear 8 are spline-coupled in FIGS. 5 and 6, they may be serrated or key-coupled instead.

A shim 25 is interposed between the saddle 18 and the bracket 23 and the bearing 9, an elastic body 10 is arranged on the opposite side of the saddle 18 and the bracket 23 from the bearing 9, and the bearing 9 and the shim 25 are interposed. , saddle 18 or bracket 23, and elastic body 1
A bolt 26 is passed through the hole and a chit 27 is tightened thereon. Depending on the number of interposed shims 25, the height position of the rotating shaft 7 is adjusted to a position where the gear 8 and the protrusion 5 are sufficiently engaged so that the tooth bottom of the gear 8 comes into contact with the protrusion 5. Further, the NAND 27 is tightened until the elastic body 10 is appropriately compressed, and its elastic restoring force constantly presses the gear 8 against the protrusion row 6. Note that the elastic body 10 does not press and urge the gear 8 against the protrusion row 6 all the time, but may apply the pressure only when the engagement between the gear 8 and the protrusion 5 becomes insufficient. .

As the elastic body 10, those shown in FIGS. 7(A) to 7(D) can be used. That is, (A) is rubber, (B) is a disc spring, (C) is a bamboo spring, and (D) is a coil spring. In this embodiment, the elastic body 10 is compressed, but if the elastic body 10 presses the gear 8 against the protrusion row 6, the elastic body 10 may generate a tensile force.

When the motor 22 is driven to rotate the drive wheel 20, the running girder 2 runs along the rail 3 while the driven wheel 21 rotates. Then, the gears 8 meshing with both protrusion rows 6 rotate together with the rotating shaft 7. At this time, even if a difference in the traveling speed relative to the rail 3 is about to occur between the left and right portions of the running girder 2 due to slipping of the drive wheel 20 that is engaged with one of the rails 3, Gears 8 that rotate integrally with each other via the rotating shaft 7 are meshed with the projection rows 6 attached to both rails 3, respectively, so that the left and right parts of the running girder 2 are forced to be the same. can travel the same distance at the same speed.

In addition, if a part of the protrusion row 6 is deformed in the vertical direction due to an addition error, the gear 8 also moves up and down during running based on the deformation, but the gear 8 , elastic body 1
Since the gear 8 is always biased in the direction of the protrusion row 6 by the gear 8, the engagement of the gear 8 with the protrusion 5 of the protrusion row 6 will not loosen in the slightest.

Therefore, the traveling girder 2 is always at an angle perpendicular to the rail 3 when viewed from above, and in this state it always travels and stops at an arbitrary set position. For this reason, the drive wheels 20. Not only does the driven wheel 21 not twist, but also the girder rail 13 of the running girder 2 can always be positioned in a straight line with respect to the fixed rail 14 shown in Fig. 1.2. There is no need to individually fine-tune the positions of the left and right parts of 2.
The hoisting device 1 can be easily and freely moved between the girder rail 13 of the traveling girder 2 and the fixed rail 14.

In this embodiment, the fixed rails 14 are arranged on both the left and right sides of the traveling girder 2, but the fixed rails 14 may be placed on either the left or the right, and the present invention can also be applied to an overhead crane 4 having a structure in which the fixed rails 14 are not arranged. It can also be applied.

As explained above, according to the present invention, protrusion rows consisting of a large number of protrusions lined up at equal intervals are installed along the left and right rails, and the gears meshing with the protrusion rows are attached to the running girder. By connecting through the installed rotating shaft and rotating both gears together, the left and right parts of the running girder can be moved at the same speed and the same distance with respect to the left and right rails. Therefore, the attitude of the running girder with respect to the rails and other fixed objects can be maintained the same at all times, so that no excessive force is applied to the running girder, especially the wheels.
Even when a fixed rail is arranged on at least one side of the running girder, there is an effect that the running girder can be smoothly connected to the fixed rail.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall plan view, FIG. 2 is a sectional view taken along line 2-2 in FIG. 1, and FIG.
Figure 3 is a plan view of the running girder, Figure 4 is 4-4 in Figure 3.
5 is a side view of a main part with a part cut away, FIG. 6 is a front view of FIG. 5, and FIG. 7 is a diagram showing an example of an elastic body. ) is an example using rubber, (B) is a disc spring, (C) is a bamboo spring, and (D) is a coil spring, respectively. Fig. 8 shows an example in which ranks are used as protrusion rows and rank teeth are used as protrusions. It is a front view with a part cut away. DESCRIPTION OF SYMBOLS 1... Hoisting device, 2... Running girder, 3... Rail, 4... Overhead crane, 5... Projection, 6... Projection row, 7... Rotating shaft, 8...・Gear, 9...Bearing, 1
0...Elastic body, 13...Girder rail, 14...Fixed rail, 18...Saddle. Patent applicant Taisei Corporation Patent applicant Seiwa Kiko Co., Ltd. Agent Patent attorney Tetsuya Mori Agent Patent attorney Yoshiaki Naito Agent Patent attorney Shimizu Authorized agent Patent attorney Kajiyama Shinze 1st procedural amendment (voluntary) 1981 April 28th, Mr. Kazuo Wakasugi, Commissioner of the Japan Patent Office 2. Name of the invention 3. Relationship with the person who makes corrections to the attitude maintenance device for the traveling girder in an overhead crane Patent applicant Taisei Corporation (and 1 other person) 4. Address of the agent Tokyo Nichiei Patent Office, 9th floor, Tokyo Bank Building, 4-2 Marunouchi-chome, Chiyoda-ku, 917-ku Nichiei Patent Office 5 Column for detailed explanation of the invention and column for brief explanation of drawings of the specification subject to amendment 6 Contents of the amendment (1) Details From line 6 to line 8 of page 7 of the book, it is stated that ``In addition, as the projection row 6, a rack may be used as shown in FIG. 8.In this case, the teeth of the rack form the projection 5. ``Furthermore, a rack may be used as the projection row 6.In this case, the teeth of the rank form the projection 5, and the pinion that meshes with this forms the gear 8.'' and correct it. (2) On page 12, line 2 to line 5 of the specification, “(D)
8 is a partially cut-away front view of an example in which coil springs are used, and FIG. 8 is a partially cutaway front view of a rack in which a row of protrusions is used and teeth of the rack are used as protrusions. " is corrected to "(D) is an example in which coil springs are used."that's all

Claims (5)

[Claims] (1) With a traveling girder equipped with a hoisting device installed on parallel rails on the left and right, an overhead crane traveling along the rails places a row of protrusions arranged at equal intervals on both rails. A rotating shaft is installed on the running girder that extends in a direction perpendicular to both rows of protrusions when viewed from the plane, and two gears that rotate together with the rotating shaft are attached to the rotating shaft. A posture maintaining device for a traveling girder in an overhead crane, characterized in that both rows of protrusions are individually engaged. (2) The apparatus for maintaining the attitude of a traveling girder in an overhead crane according to claim 1, wherein the projection row is a rank and the gear is a pinion. (3) The apparatus for maintaining the attitude of a running girder in an overhead crane according to claim 1, wherein the row of protrusions is a chain, and the gear is a sprocket wheel. (4) The rotating shaft and the gear are spline coupled. An attitude maintaining device for a traveling girder in an overhead crane according to claim 1, which is connected by serrations or by a key. (5) When a traveling girder equipped with a hoisting device is installed on parallel left and right rails, an overhead crane that travels along the rails places a row of protrusions arranged at equal intervals on both rails. A rotating shaft extending in a direction perpendicular to both protrusion rows when viewed from the plane is supported by a bearing and installed on the running girder, and the rotating shaft has two gears that rotate together with the rotating shaft. traveling in an overhead crane, characterized in that both gears are individually meshed with both rows of projections, and an elastic body is interposed between the bearing and the traveling girder to bias the gears in a direction to press the rows of projections. Girder attitude maintenance device.