JP5814722B2 - Crane traveling device - Google Patents

Description

  The present invention relates to a crane traveling device.

  The crane saddle is a crane traveling device for cranes for hoisting and transporting a load, and wheels are attached to a saddle frame to move on a traveling path. (See Patent Documents 1 and 2). The crane saddles are used in pairs, and are used for traveling of the crane by being coupled to both ends of the girder from which the hoisting machine is suspended. (See Patent Document 3)

Japanese Patent Laid-Open No. 4-85295 JP 2002-338193 A Patent 1489592

  In order to prioritize simplification and durability, the conventional crane saddle has a collar of a predetermined length between the saddle frame and the wheel as disclosed in Patent Document 1 and Patent Document 2, and is attached to the saddle frame. The position of the wheel is fixed by a collar so that the wheel that has been moved does not move in the direction of the central axis of the cylinder.

  Therefore, the traveling center axis of the wheel attached to one end of the saddle frame and the traveling center axis of the wheel attached to the other end due to an assembly error of the crane saddle or bending of the members constituting the saddle frame. If there is a slippage, the traveling performance of the crane will deteriorate, and the crane's lameness, abnormal wear of the wheels, abnormal noise, etc. may cause the crane's mechanical and structural parts to become unreasonable and reduce its function. There was a risk of dangerous conditions such as derailment of the crane.

  For this reason, the prior art disclosed in Patent Document 1 and Patent Document 2 needed to provide a dimensional accuracy of the saddle frame and to correct different bending of each member in order to make the traveling center axis of each wheel coaxial. . Further, when assembling the crane saddle as a crane, it is necessary to obtain the dimensional accuracy of the girder assembly, and the assembling workability of the crane is poor.

  The present invention makes it possible to make the traveling center axis of the driving wheel coincide with the traveling center axis of the driven wheel without paying special attention to the dimensional accuracy of the members constituting the saddle frame. An object of the present invention is to provide a crane saddle with good centering workability.

  In order to solve the above-described problem, for example, a crane traveling device including a pair of crane saddles arranged to be able to travel on a pair of traveling rails and a girder connecting the pair of crane saddles, the crane The saddle includes a saddle frame, a wheel rotatably supported on the saddle frame by an axle, and provided to roll on the running rail, between one surface of the wheel facing the saddle frame, and the wheel Between the other surface of the wheel facing the saddle frame, there is a collar provided so as to be in contact with the side surface of the wheel, and the wheel has its side surface regulated by the collar so that the wheel position is determined by the collar. The collar has an adjustment mechanism movable in the direction of the central axis of the cylinder, and the collar has a hole for passing the axle, and the collar is rotated on the end face thereof. A projection having a thread formed on a cylindrical surface that can rotate without detaching from the collar, and the saddle frame has a mounting hole provided for mounting the projection of the collar. Then, a thread that meshes with a thread formed on the surface of the protrusion provided on the collar is formed on the inner surface of the mounting hole, and is fastened with the protrusion provided on the collar with the thread. The position of the collar is such that the collar is movable in the direction of the central axis of the wheel when the projection provided on the collar is rotated along the thread that meshes with the saddle frame.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturability and assembly workability | operativity of a crane traveling apparatus and a crane with a traveling apparatus can be improved.

It is an external appearance perspective view of the whole structure of the crane with a traveling apparatus of one Example of this invention. It is a top view of the crane saddle of one Example of this invention. It is a front view of the crane saddle in Fig.2 (a). It is a front view of the crane saddle driven wheel fixed part of one Example of this invention. It is sectional drawing of the crane saddle driven wheel fixed part in Fig.3 (a). It is an external appearance perspective view of the crane saddle driven wheel fixed part of one Example of this invention. It is an external appearance perspective view of the color in FIG. FIG. 5 is an exploded view of the color in FIG. 4. It is a front view of the crane saddle driven wheel fixed part of one Example of this invention. It is sectional drawing of the crane saddle driven wheel fixed part in Fig.6 (a). It is sectional drawing of the crane with a traveling apparatus in Fig.6 (a).

  Embodiments of the present invention will be described below with reference to FIGS. The present invention is not limited to the illustrated example.

  First, the overall configuration and operation status of the crane with a traveling device will be described with reference to FIG. FIG. 1 is an external perspective view of the overall configuration of a crane with a traveling device according to an embodiment of the present invention.

  First, the whole structure of the crane with a traveling apparatus is demonstrated. There are traveling rails 11a and 11b arranged to face each other in pairs, and a crane saddle 20a including a traveling driving wheel 25a and a driven wheel 26a is installed on the traveling rail 11a so as to be able to travel. On the traveling rail 11b, a crane saddle 20b including a traveling drive wheel 25b and a driven wheel 26b is installed so as to be able to travel. The crane saddles 20a and 20b are connected by a girder 10.

  The crane traveling device of the present invention includes a pair of crane saddles and a girder that connects the crane saddles. In the girder 10, the electric trolley 2 is installed so as to be able to traverse the girder 10, and a saddle control unit 12 that controls the crane saddles 20 a and 20 b is provided. The electric trolley 2 is provided with an electric hoist 1 for moving the load up and down, and the electric hoist 1 is provided with a crane hook 4 for suspending the load. The electric hoist 1 includes a hoisting machine controller 5 that controls the electric hoist 1 and the electric trolley 2, and an operation input device 3 for operating a crane with a traveling device.

  Next, operation | movement of the crane with a traveling apparatus is demonstrated using FIG. When an operator inputs an operation using the operation input device 3, the hoisting machine control unit 5 controls the movement of the electric hoisting machine 1 and the electric trolley 2 according to the input control signal and is attached to the crane hook 4. The loaded load can be moved in the Z and -Z directions or in the X and -X directions. Similarly, the saddle control unit 12 controls the movement of the crane saddles 20a and 20b in accordance with a control signal input from the operation input device 3, and the load attached to the crane hook 4 is moved in the Y direction and the -Y direction. Can be moved.

  Note that the collars 32a and 32b shown in FIG. 1 are an example of a centering mechanism constituting the present embodiment, and details will be described later.

  Next, the overall configuration of the crane traveling device of this embodiment will be described with reference to FIGS. 2 (a) and 2 (b). 2 (a) and 2 (b) are examples of the centering mechanism constituted by the collar of the present invention, FIG. 2 (a) is a plan view of the crane saddle in this embodiment, and FIG. 2 (b) is the book. It is a front view of the crane saddle in the Example of invention. The crane saddles are used in pairs. In this embodiment, the left and right crane saddles have the same configuration, and therefore, FIG. 2 (a) and FIG. 2 (b) are used. Only the configuration of one crane saddle will be described.

  As shown in FIGS. 2 (a) and 2 (b), the crane saddle 20a includes a traveling drive wheel 25a and a driven wheel 26a on a saddle frame 28a. The saddle frame 28a has a substantially rectangular parallelepiped shape, and dampers 30 serving as shock absorbing devices are attached to both end faces in the longitudinal direction of the saddle frame 28a, that is, both end faces facing the running direction.

  An axle mounting hole to which the axle 27 is attached is provided at one end in the longitudinal direction of the saddle frame 28a, and the axle 27 is attached by fitting. The axle 27 is fixed to the saddle frame 28a by an axle stopper 29, and a driving wheel 25a for traveling is attached rotatably. The traveling drive wheel 25a is a wheel that is rotated by a driving device. As the driving device for the traveling drive wheel 25a, an electric motor 21 that rotationally drives the traveling drive wheel 25a, a brake 22 that is a braking mechanism of the electric motor 21, a traveling A speed reduction portion 23 that adjusts the rotational speed of the driving wheel 25a and the final speed reduction stage 24 are combined and attached. A final deceleration stage 24 is attached between the saddle frame 28a and the traveling drive wheel 25a so as to be coupled to the traveling drive wheel 25a, and a deceleration unit 23 is provided outside the saddle frame 28a so as to be coupled to the final deceleration stage 24. Is attached, and the upper part of the final deceleration stage 24 is covered with a final deceleration stage cover 31. An electric motor 21 is attached to the speed reduction portion 23, and a brake 22 is provided inside the electric motor to constitute a drive device. The traveling drive wheel 25a is positioned so as to be sandwiched between one surface of the saddle frame 28a and the traveling drive wheel 25a and between the saddle frame 28a and the other surface of the traveling drive wheel 25a. It is fixed so as not to move in the direction of the central axis of the cylinder by a collar 32a that is rotatably mounted.

  An axle mounting hole to which the axle 27 is attached is provided at the other end in the longitudinal direction of the saddle frame 28a, and the axle 27 is attached by fitting. The axle 27 is fixed to the saddle frame 28a by an axle stopper 29, and a driven wheel 26a is rotatably attached. The driven wheel 26a is positioned between the saddle frame 28a and one surface of the driven wheel 26a, and between the saddle frame 28a and the other surface of the driven wheel 26a, so that the position of the wheel is a cylindrical central axis of the wheel. It is fixed so that it does not move in the direction.

As shown in FIG. 2 (a), the traveling center axis XX of the traveling drive wheel 25a attached to one end of the saddle frame is caused by an assembly error of the crane saddle or bending of the members constituting the saddle frame. If a parallel difference L occurs between the shaft and the traveling center axis Y-Y of the driven wheel 26a attached to the other end, the traveling performance of the crane deteriorates, and the crane coasts, abnormal wear of the wheels, and abnormal noise are generated. May cause trouble in the mechanical and structural parts of the crane and reduce its function. In the worst case, it may lead to dangerous conditions such as derailment of the crane. Therefore, it is necessary to make the parallel difference L smaller than an allowable value.
The crane saddle 20a according to the embodiment of the present invention shown in FIGS. 2 (a) to 3 (b) has a position of the collar 32a between one surface of the driven wheel 26a facing the saddle frame 28a and the saddle frame 28a. The operation of the centering mechanism of the crane saddle according to the present embodiment, which reduces the value of the parallel difference L shown in FIG. 2A by moving between the other surfaces of the opposed driven wheels 26a, will be described below. When the parallel difference L occurs, as shown in FIGS. 3A and 3B, a collar having a cylindrical shape that is rotatably attached to the axle 27 and having a cut in the height direction of the cylinder. 32a is moved between the surface of the driven wheel 26a facing the saddle frame 28a closer to the saddle frame 28a closer to the traveling center axis XX, and moved between the surface of the driven wheel 26a facing the other saddle frame 28a. 26a moves in the direction of the traveling center axis Y-Y axis by the same distance as the thickness of the moved collar 32a.

  Therefore, the collar 32a has a number of collars 32a whose total thickness is the same as the distance of the parallel difference L between the surfaces of the driven wheels 26a facing the saddle frame 28a closer to the traveling center axis XX. Therefore, an adjustment mechanism is provided that can move the position of the driven wheel 26a so that the parallel difference L is reduced as much as possible by moving between the surface of the driven wheel 26a facing the other saddle frame 28a.

  The collar 32a is an elastic body having a cylindrical shape and having a cut in the height direction of the cylinder. When a force is applied to the cut in the circumferential direction, a gap between the cylindrical cuts is expanded according to the force. When the applied force is removed, the gap between the cylindrical cuts is reduced to return to the original shape.

  In order to remove the collar in the conventional structure, it is necessary to remove the axle 27 and the driven wheel 26a from the saddle frame 28a. However, since the crane saddle 20a is installed on the traveling rail 11a, it is necessary to work on a high place. Although the scaffolding is unstable, the collar 32a according to the embodiment of the present invention is attached to and detached from the axle 27 without removing the axle 27 from the saddle frame 28a by the gap of the enlarged slit. It has a mechanism that can be removed.

  Further, the collar 32a is provided with a protrusion on the top, so that the collar 32a can be removed so as to be pulled out. Note that the present invention shown in FIGS. 3A to 3B is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, by providing a protrusion and / or a hole for applying force to the cut portion of the collar 32a, or both, it is possible to efficiently apply force to the cut portion to provide a structure with good attachment and detachability.

  The crane saddle 20a of the embodiment of the present invention shown in FIGS. 6 and 7 reduces the value of the parallel difference L as follows by moving the position of the collar 32a in the direction of the center axis of the cylinder of the wheel. The collar 32a is formed in a cylindrical shape having a thread on the surface, and the end surface of the collar 32a is always in contact with the two surfaces facing the driven wheel 26a of the saddle frame 28a across the cylindrical surface of the driven wheel 26a. One or more each can be attached. The saddle frame 28a includes a screw thread that meshes with a screw thread of the collar 32a on an inner surface of a mounting hole provided so that the collar 32a is attached, and is fastened to the collar 32a with the screw thread.

  Here, as shown in FIG. 2A, when a parallel difference L occurs between the travel center axis XX of the travel drive wheel 25a and the travel center axis Y-Y of the driven wheel 26a, the travel center axis X The collar 32a fastened to the side surface of the saddle frame 28a closer to the -X axis is such that the travel center axis XX axis and the travel center axis YY axis are coaxial with the end face always in contact with the surface of the driven wheel 26a. The collar 32a, which is rotationally moved along the thread that meshes in the direction of the saddle frame 28a until it becomes, and is fastened to the other saddle frame 28a, is threaded that meshes in the direction of the driven wheel 26a until the end surface contacts the surface of the driven wheel 26a. The crane saddle 20a according to the embodiment of the present invention has an adjustment mechanism that can move and fix the position of the driven wheel 26a so that the parallel difference L does not occur.

  In the crane saddle of the embodiment of the present invention shown in FIGS. 4 to 5B, the position of the collar 32a is moved in the direction of the center axis of the cylinder of the wheel. Hereinafter, the operation of the centering mechanism of the crane saddle of the present embodiment will be described. As shown in FIGS. 5 (a) and 5 (b), the collar 32a is formed in a substantially cylindrical shape having a disk-shaped flange protruding so as to protrude from the circumference of the right circular cylinder. A collar rod 40 having a thread on the surface from the end face to the flange and a ball bearing 41 are fixed to the disc-shaped collar plate 43 by screws 42 with screws 42. The collar plate 43 is provided with a mounting groove to which the ball bearing 41 is mounted on one surface, the ball bearing 41 is mounted by fitting, and the inner surface side track ring of the ball bearing mounted on the driven wheel 26a on the other surface. It has a ring-shaped protrusion for tightening the end face. Further, the collar rod 40 is attached by being fitted into the ball bearing 41, thereby reducing the friction during rotation and rotating each other than when the two contact surfaces of the color rod 40 and the color plate 43 rotate in direct contact with each other. The configuration is less affected by

  The flat plate-shaped retaining member 42 has a through hole for passing the color rod 40 in the center, and the through hole has a dimension not less than the diameter of the right cylinder of the color rod 40 and less than the flange diameter. When the rod 40 is passed from one side, the flange portion is caught on the circumference of the through hole. In addition, an axle hole through which the axle 27 can be passed is provided in the central portion of the color plate 43, and the collar plate 43 is arranged at a concentric position with the driven wheel 26 a by passing the axle 27.

  As shown in FIG. 5B, the saddle frame 28a includes a thread that meshes with the thread of the color rod 40 on the inner surface of the mounting hole provided so that the collar rod 40 of the collar 32a can be mounted. It is fastened to the rod 40 with a screw thread.

  In the above embodiment, as shown in FIG. 2A, when a parallel difference L occurs between the travel center axis XX of the travel drive wheel 25a and the travel center axis YY of the driven wheel 26a, The collar 32a fastened to the side surface of the saddle frame 28a closer to the central axis XX is the traveling central axis XX axis with the end surface of the color plate 43 included in the collar 32a always in contact with the surface of the driven wheel 26a. The collar 32a which the color plate 43 has in the frame direction is rotated until the traveling center axis Y-Y axis is coaxial, and the collar 32a fastened to the other saddle frame 28a is the end face of the color plate 43 which the collar 32a has. Is rotated and moved along the thread that engages the color rod 40 of the color plate 43 in the direction of the driven wheel 26a until it contacts the surface of the driven wheel 26a. Having an adjusting mechanism capable of parallel difference L is fixed to move the position of the follower wheel 26a so as not to occur.

  Note that the present invention shown in FIGS. 4 to 5B is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, by providing a polygonal or circular head on the end face of the collar 32a facing the saddle frame 28a, the collar 32a can be rotated more easily by a tool or manually, and a structure with good operability can also be obtained. Similarly, the same effect as described above can be obtained by providing a tool or a groove or a hole for manual rotation on the end surface of the collar 32a facing the saddle frame 28a.

  In the crane saddle of the embodiment of the present invention shown in FIGS. 6A to 7, the value of the parallel difference L is reduced as follows when the axle 27 moves in the axial direction. The axle 27 has a stepped cylindrical shape in which a large-diameter cylindrical portion and a small-diameter cylindrical portion having different outer diameters are coaxially arranged, and has a thread on the surface of the large-diameter cylindrical portion. The large-diameter cylindrical portion is engaged with a screw thread provided on the inner diameter of the axle mounting hole of the saddle frame 28a on the girder 10 side and a screw thread provided on the large-diameter cylindrical portion, and the small-diameter cylindrical portion is fastened to the saddle frame 28a on the building wall side. Installed by mating.

  A driven wheel 26a is rotatably attached to the small diameter cylindrical portion, and the driven wheel 26a is positioned so as to be sandwiched between the large diameter cylindrical portion of the axle 27 and the collar 32a. The driven wheel 26a is prevented from moving in the axial direction by contacting the large diameter cylindrical portion and the collar 32a, and the position is fixed.

  Here, FIG. 6A and FIG. 6B are examples when the collar 32a is fixed to the driven wheel 26a, and one or more key-like shapes are formed in the groove portion of the axle 27 having a circumferential groove. The collar 32a is fitted and the position is fixed. The collar 32a is fastened to the driven wheel 26a by a mechanical element such as a bolt so as not to be detached from the groove portion of the axle 27.

  In the above embodiment, as shown in FIG. 2 (a), when a parallel difference L occurs between the travel center axis XX of the travel drive wheel 25a and the travel center axis YY of the driven wheel 26a, the saddle By rotating and moving the large-diameter cylindrical portion of the axle 27 in the direction in which the parallel difference L is reduced along the thread that meshes with the frame 28a, the position of the driven wheel 26a is moved to a position where the parallel difference L becomes zero. It has an adjustment mechanism that can be fixed.

  Furthermore, as shown in FIG. 7, when the crane saddles 20a and 20b are installed on the traveling rails 11a and 11b provided along the buildings 50a and 50b, the buildings 50a and 50b and the crane saddles 20a and 20b Since there is no work space in between, it is not possible to make adjustments by installing an adjustment mechanism on the buildings 50a and 50b side, so it is necessary to work after the crane is lowered to the ground. It is possible to reduce the value of the parallel difference L only by adjustment.

  As described above, according to the present invention, the collars 32a and 32b provided on the driven wheels 26a and 26b of the saddle frames 28a and 28b can adjust the positions of the driven wheels so as to reduce the parallel difference between the traveling center axes. By having a mechanism, even if there is a deviation between the traveling center axis of the driving wheel for traveling and the traveling center axis of the driven wheel due to assembly errors of the crane saddle or bending of the members constituting the saddle frame, the saddle frame Crane traveling device and traveling with good centering workability of wheels, which can easily match the traveling center axis of the driving wheel and the driven wheel without increasing the dimensional accuracy and correcting different bending of each member. A crane with a device can be provided.

DESCRIPTION OF SYMBOLS 1 ... Electric hoisting machine, 2 ... Electric trolley, 3 ... Operation input device, 4 ... Crane hook, 5 ... Hoisting machine control part, 10 ... Girder, 11a, 11b ... Traveling rail, 12 ... Saddle control part, 20a, 20b ... Crane saddle, 21 ... Electric motor, 22 ... Brake, 23 ... Deceleration part, 24 ... Final deceleration stage, 25a, 25b ... Driving wheel, 26a, 26b ... Drive wheel, 27 ... Axle, 28a, 28b ... Saddle frame 29 ... Axle stopper, 30 ... Damper, 31 ... Final reduction stage cover, 32a, 32b ... Color, 40 ... Color rod, 41 ... Ball bearing, 42 ... Retaining stopper, 43 ... Color plate, 50a, 50b ... Building

Claims (1)

A crane traveling device having a pair of crane saddles arranged to travel on a pair of traveling rails, and a girder connecting the pair of crane saddles,
The crane saddle is
A saddle frame,
A wheel rotatably supported by the axle on the saddle frame and provided to roll on the running rail;
A collar provided between the one surface of the wheel facing the saddle frame and the other surface of the wheel facing the saddle frame so as to contact the side surface of the wheel;
The wheel by being restricted side by the collar, have a movable adjusting mechanism wheels located in the cylindrical axial direction of the wheel,
The collar has a hole for passing an axle, and has an end surface provided with a protrusion formed with a thread on a cylindrical surface that can rotate without rotating the collar without detaching from the collar. ,
The saddle frame has a mounting hole provided so that the projection of the collar is mounted, and a thread that meshes with a thread formed on the surface of the projection provided in the collar is formed on the inner surface of the mounting hole. The position of the wheel is rotationally moved along the thread where the protrusion provided on the collar meshes with the saddle frame by being fastened with the protrusion provided on the collar with a thread. Is movable in the direction of the central axis of the cylinder of the wheel .

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