JP6661582B2 - Fixed structure and derailment prevention device - Google Patents

Description

  The present invention relates to a fixing structure and a device for preventing wheel removal.

  2. Description of the Related Art When an upward load is applied to an overhead crane due to an earthquake, a bound load, or the like, a phenomenon that the overhead crane installed on a rail is lifted is known. If the overhead crane lifts off the rails, the overhead crane may fall off.

  Therefore, even if an earthquake or a bound load occurs, a device for preventing a wheel of the overhead crane from coming off the rail is under development. For example, Patent Literature 1 discloses a derailment prevention device that is fixed to an overhead crane and includes a pair of claw portions that sandwich a head of a rail downward from both sides.

JP 2013-123965 A

  The derailing prevention device of Patent Literature 1 has a U-shaped engagement member that sandwiches a frame of an overhead crane and a fixing plate of the derailment prevention device, and a bolt attached to the engagement member forms a frame and a fixing plate. Is fixed between a pair of frames arranged in parallel with each other of the overhead crane. For this reason, when a large load is repeatedly applied to the derailing prevention device, the tightening by the U-shaped engagement member and the bolt gradually loosens, and the derailing prevention device cannot be stably fixed to the overhead crane. There is a problem.

  In order to solve this problem, it is conceivable to fix the derailing prevention device to the overhead traveling crane by forming a through-hole in the overhead crane and tightening the through-hole with a bolt through the female screw hole of the derailing prevention device. However, when a through hole is formed in an existing overhead crane, there is a problem that the strength of the overhead crane is affected. These problems are not limited to the case where the derailing prevention device is fixed to the overhead crane, but also exist when the structure is fixed between a pair of frames arranged in parallel with each other.

  The present invention has been made based on such a background, and a fixing structure capable of firmly fixing a structure between a pair of frames arranged in parallel with each other without processing the frames. And a device for preventing wheel slippage.

In order to achieve the above object, the fixing structure according to the present invention is:
A fixing structure for fixing a structure between a pair of frames arranged in parallel with each other,
When the structure is disposed between the frames, a protrusion provided on the structure so as to protrude from the structure, and formed to increase in width from the upper side to the lower side,
When arranged in a gap formed between the frame and the protruding portion, the side portion of the protruding portion and the side surface portion and the lower surface portion of the frame are in contact with each other, and the width is increased from a lower side to an upper side. A mounting portion formed to be wide;
Urging means for urging the protruding portion upward so as to press the side portion of the mounting portion against the side portion of the frame;
Is provided.

  ADVANTAGE OF THE INVENTION According to this invention, between a pair of flame | frames arrange | positioned mutually mutually, the fixing | fixed structure which can firmly fix a structure without processing a frame, and a wheel-release prevention device can be provided.

It is a front view of an overhead crane concerning an embodiment of the invention. It is a top view of an overhead crane concerning an embodiment of the invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the derailing prevention apparatus which concerns on embodiment of this invention. It is sectional drawing which cut | disconnected the derailing prevention apparatus shown in FIG. 3 in the YZ plane containing a wheel axis. It is sectional drawing which cut | disconnected the derailment prevention apparatus shown in FIG. 3 by the AA line. It is a figure for explaining composition of a fixed structure concerning an embodiment of the invention. It is a front view showing a control board and a screw part concerning an embodiment of the invention.

  Hereinafter, a fixing structure and a wheel preventing device according to an embodiment of the present invention will be described with reference to the drawings. In each drawing, the same or equivalent parts are denoted by the same reference numerals.

  In the embodiment, the traveling direction in which the overhead traveling crane travels along the rail is the X axis, the direction perpendicular to the traveling direction of the overhead traveling crane is on the horizontal plane, and the direction perpendicular to the traveling direction of the overhead crane is perpendicular to the X axis and the Y axis. That is, an orthogonal coordinate system having the vertical direction as the Z axis is used.

  In addition, in the embodiment, the case where the fixing structure is applied to the derailing prevention device and the derailing prevention device is applied to the overhead crane will be described as an example, but the fixing structure according to the embodiment is other than the derailing prevention device. The device may be applied to a device, and the device for preventing derailing according to the embodiment may be applied to a device other than the overhead crane.

(Embodiment)
The configuration of the overhead crane 1 according to the embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view of the overhead crane 1 observed from a traveling direction. The overhead crane 1 is installed so as to straddle between a pair of rails 2 installed near the ceiling of a building such as a factory or a warehouse, and runs on the pair of rails 2 in the X-axis direction.

  The overhead crane 1 includes a girder 10, a pair of saddles 20 fixed to both ends of the girder 10, and a hoisting machine 30 installed on an upper surface of the girder 10.

  The girder 10 is a beam-shaped member arranged in the Y-axis direction so as to straddle between the pair of rails 2.

  The saddles 20 support both ends of the girder 10 and are installed on the rails 2 and run on the rails 2 in the X-axis direction. Each saddle 20 includes a pair of frames 21 and wheels 22. The pair of frames 21 are arranged so as to be separated from each other in the Y-axis direction and extend in parallel with the X-axis direction. The wheels 22 are arranged between the pair of frames 21 and are rotatably supported by the frames 21. The wheels 22 are rotatably connected to a driving device (not shown) such as a motor.

  The hoisting machine 30 is a device for winding up a wire rope 31 capable of suspending a suspended load. The hoisting machine 30 includes a driving device (not shown) such as a motor for winding the wire rope 31. A hook 32 for suspending a suspended load is provided at the tip of the wire rope 31.

  FIG. 2 is a plan view of the overhead traveling crane 1 observed from above, and shows a state in which the derailment prevention device 100 is fixed to the overhead traveling crane 1. In order to facilitate understanding, unlike FIG. 1, the illustration of the installation portion of the rail 2 is omitted.

  The derailment prevention device 100 is a device that is fixed to the overhead crane 1 and that prevents the derailment of the overhead crane 1 from the rail 2. The wheel removal prevention device 100 is detachably fixed between a pair of frames 21 of the saddle 20 by a fixing mechanism described later. Two saddle prevention devices 100 are fixed to each saddle 20 between a pair of wheels 22 at intervals in the X-axis direction.

  Next, with reference to FIGS. 3 to 5, a configuration of the derailing prevention device 100 according to the embodiment of the present invention will be described.

  FIG. 3 is a front view showing a state in which the derailing prevention device 100 fixed to the overhead crane 1 is observed from the traveling direction of the overhead crane 1. In order to facilitate understanding, a pair of frames 21 of the overhead crane 1 are shown cut along the YZ plane.

  The derailment prevention device 100 includes a fixed frame 110 fixed to the overhead crane 1, a moving frame 120 that moves vertically with respect to the fixed frame 110, and a fixed frame 110 and the fixed frame 110. A compression spring for urging the moving frame 120 downward with respect to 110 and a wheel portion 140 provided on the moving frame 120 and running on the rail 2 are provided.

  The fixed frame 110 is a frame that is fixed between the pair of frames 21 of the overhead crane 1 and houses the moving frame 120 therein. The fixed frame 110 is formed to have a width dimension smaller than the interval between the pair of frames 21. The fixed frame 110 includes a main body 111, a compression spring presser 112, a pair of protrusions 113, a pair of detents 114, and a bush.

  The main body 111 is a cubic member that accommodates the movable frame 120 therein and supports the movable frame 120 so as to be movable in the Z-axis direction. The main body unit 111 is formed of, for example, a metal material, and includes a through hole that accommodates the moving frame 120 therein. The through-hole is formed at the center of the main body 111 in the Z-axis direction, and has a circular cross section, for example.

  The main body portion 111 is provided in the four corners of the upper surface portion in the Z-axis direction, and has female screw holes into which bolts can be screwed. The bolts are inserted into the corresponding through holes of the compression spring holding portion 112 and fastened to the female screw holes, thereby fixing the compression spring holding portion 112 to the upper surface of the main body 111.

  The main body 111 is provided at the four corners of the lower surface in the Z-axis direction, and has female screw holes into which bolts can be screwed. The bolts are inserted into the corresponding through holes of the detent 114 and fastened to the female screw holes, thereby fixing the detent 114 to the lower surface of the main body 111.

  The compression spring pressing portion 112 is a member fixed to the upper surface of the main body 111 and pressing the compression spring from above. The compression spring pressing portion 112 is formed of, for example, a metal material, and includes a bottom surface portion 112a, a cylindrical portion 112b, and an upper surface portion 112c.

  The bottom surface portion 112a is a plate-shaped member installed on the upper surface portion of the main body portion 111. The bottom surface portion 112a is provided with a through hole in which a compression spring can be arranged at the center portion and whose cross-sectional shape matches the through hole at the center portion of the main body portion 111. The bottom surface portion 112a has through holes at four corners through which bolts can be inserted. The bottom surface portion 112a is fixed to the upper surface portion of the main body portion 111 by fastening bolts inserted through the through holes at the four corners to female screw holes provided at the four corners of the upper surface portion of the main body portion.

  The cylindrical portion 112b is fixed around a through hole provided at the center of the bottom portion 112a. The cylindrical portion 112b accommodates a compression spring therein.

  The upper surface portion 112c is a plate-shaped member fixed to the tip of the cylindrical portion 112b. The upper surface portion 112c contacts the distal end of the compression spring and presses the compression spring from above.

  The protruding portions 113 are respectively fixed to opposing side surfaces of the main body 111 and protrude from the main body 111 in the X-axis direction. The protrusion 113 is formed of, for example, a metal material, and is fixed to the surface of the main body 111 by welding or the like. The protrusion 113 constitutes a part of a fixing structure for fixing the fixed frame 110 between the pair of frames 21 of the overhead crane 1. Details of the protrusion 113 will be described later.

  The pair of rotation stoppers 114 are fixed to the lower end of the main body 111 at positions separated from each other in the Y-axis direction, and are elongated plate-like members that sandwich the moving frame 120 and prevent the rotation of the moving frame 120 around the Z axis. is there. The detent 114 is formed of, for example, a metal material, and includes a contact portion that contacts the moving frame 120 in order to restrict rotation of the moving frame 120 around the Z axis. When the movable frame 120 is accommodated inside the fixed frame 110, the detent 114 contacts the side surface of the movable frame 120 to prevent the movable frame 120 from rotating around the Z axis.

  When the movable frame 120 moves downward with respect to the fixed frame 110, the pair of rotation stoppers 114 come into contact with the claws radially protruding from the upper end of the side surface of the movable frame 120, and move with respect to the fixed frame 110. The downward movement of the frame 120 is restricted.

  The detents 114 are provided at both ends in the longitudinal direction with through holes through which bolts can be inserted. The pair of detents 114 are fixed to the lower surface of the main body 111 by inserting bolts into the through holes provided in the detent 114 and tightening the bolts in the female screw holes on the lower surface of the main body 111.

  FIG. 4 is a cross-sectional view of the derailing prevention device 100 shown in FIG. 3 cut along a YZ plane including a wheel shaft and observed from the X-axis direction. FIG. It is sectional drawing which cut | disconnected by AA and showed the cross section of XZ plane.

  As shown in FIGS. 4 and 5, the bush 115 is fitted into the inner surface of the through hole at the center of the main body 111, fills a gap between the fixed frame 110 and the moving frame 120, and It is a cylindrical member used to buffer the moving frame 120. The bush 115 is made of, for example, a metal material such as bronze or brass, or a resin material having good slidability such as nylon or polytetrafluoroethylene. In addition, a concave portion that is continuous in the circumferential direction is formed on the inner side surface of the main body 111 to fit the bush 115.

  The moving frame 120 is a frame that is accommodated inside the fixed frame 110 and moves in the vertical direction, that is, the Z-axis direction with respect to the fixed frame 110. The moving frame 120 is a cylindrical member made of, for example, a metal material and having openings at upper and lower ends, respectively. The moving frame 120 includes a compression spring housing section 121, a compression spring holding section 122, a wheel housing section 123, a pair of extension sections 124, and a claw section 125.

  The compression spring accommodating portion 121 is a cylindrical portion provided above the moving frame 120 and accommodating the compression spring 130.

  The compression spring holding portion 122 is a plate-shaped portion provided on a horizontal plane at the lower end of the compression spring housing 121 and in contact with the lower end of the compression spring 130. The compression spring holding portion 122 is provided with a circular concave portion 122a on which the base end portion of the compression spring 130 is installed and which restricts the radial movement of the compression spring 130. The compression spring holding portion 122 has a female screw hole 122b at the center thereof into which a male screw portion at the tip of a hanging jig for hanging the moving frame 120 can be screwed.

  The wheel housing portion 123 is a cylindrical portion provided below the compression spring pressing portion 122 and housing the wheel of the wheel portion 140. The wheel accommodating portion 123 includes a pair of through holes for inserting and fixing the wheel shaft of the wheel portion 140 on a side surface portion.

  The pair of extension portions 124 are arranged apart from each other in the Y-axis direction, extend downward from the lower end portion of the wheel accommodating portion 123, and regulate the movement of the wheel removal prevention device 100 in the Y-axis direction. The pair of extension portions 124 are configured to sandwich the head of the rail 2 when the wheel removal prevention device 100 is installed between the pair of frames 21 of the overhead crane 1.

  The claw 125 is a member provided at the upper end of the compression spring housing 121 and protruding in the radial direction. When the movable frame 120 moves downward with respect to the fixed frame 110, the claw portion 125 contacts the upper surface of the detent 114 of the fixed frame 110 to prevent the movable frame 120 from moving further downward.

  The compression spring 130 is disposed in an internal space formed by the fixed frame 110 and the moving frame 120, and urges the moving frame 120 downward with respect to the fixed frame 110. The compression spring 130 is, for example, a coil-shaped compression spring. One end of the compression spring 130 is in contact with the compression spring pressing portion 122 of the moving frame 120, and the other end is in contact with the compression spring pressing portion 112 of the fixed frame 110. In contact.

  In addition, the upper surface part 112c of the compression spring pressing part 112 has a continuous circumferential convex part 112d on the inner surface. For this reason, the compression spring 130 is arranged outside the convex portion 112d, and its inner periphery is restricted, so that the compression spring 130 is restricted from moving in the horizontal direction.

  The spring constant of the compression spring 130 can be appropriately selected according to the weight of the overhead crane 1, the size, the mass, the number of installations, the installation position, and the like of the derailment prevention device 100.

  The compression spring 130 is arranged in an internal space formed by the fixed frame 110 and the moving frame 120 while being compressed in the vertical direction by receiving a load from the overhead crane 1. Therefore, when the derailment prevention device 100 is fixed to the overhead crane 1 installed on the rail 2, the compression spring 130 moves the moving frame 120 from the fixed frame 110 fixed to the overhead crane 1 to the rail 2. Energize to push constantly.

  The wheel unit 140 is supported by the moving frame 120 and runs on the rail 2. The wheel unit 140 includes a wheel shaft 141, a bearing 142, and wheels 143.

  The wheel shaft 141 is inserted through and fixed to a pair of through holes formed at the lower end of the wheel housing portion 123 of the moving frame 120.

  The bearing 142 is a mechanical element that is fixed to the outer peripheral surface of the wheel axle 141 by fitting or the like, supports the load of the derailment prevention device 100, and rotatably supports the wheel 143 around the axis of the wheel axle 141. . The bearing 142 is, for example, a rolling bearing such as a ball bearing and a roller bearing.

  The wheel 143 is rotatably supported on a wheel shaft 141 via a bearing 142. The wheels 143 come into contact with the rails 2 to transfer the load of the derailment prevention device 100 to the rails 2 when the derailment prevention device 100 is fixed to the overhead crane 1, and the overhead cranes 1 roll on the rails 2. Then, the wheel 143 also rolls on the rail 2.

  Next, the operation of the wheel removal prevention device 100 according to the embodiment of the present invention will be described. In order to facilitate understanding, it is assumed that the derailing prevention device 100 is fixed to the overhead crane 1 installed on the rail 2.

  When no upward force is applied to the overhead crane 1, the wheels 143 of the derailment prevention device 100 fixed to the overhead crane 1 are in contact with the rails 2 together with the wheels 22 of the overhead crane 1. When the wheels 22 of the overhead crane 1 are rotated by the driving device and the wheels 22 roll on the rails 2, the wheels 143 of the wheel release prevention device 100 also roll on the rails 2.

  Even if an upward force is applied to the overhead crane 1 due to an earthquake or the like, and the overhead crane 1 rises from the rail 2, the moving frame 120 is always biased toward the rail 2 by the compression spring 130, so that the wheels 143 are connected to the rail 143. 2 remains in contact. At this time, the pair of extension portions 124 of the moving frame 120 sandwich the head of the rail 2 from both sides, and the movement of the wheel release prevention device 100 in the Y-axis direction is restricted. Can be prevented from derailing from the rail 2.

  The pair of extension portions 124 extend downward from the lower end portion of the wheel housing portion 123 and do not include a claw portion that goes under the head of the rail 2. Therefore, even when the overhead crane 1 rises from the rail 2, no upward force acts on the head of the rail 2 by the pair of extension portions 124. Therefore, in the device for preventing derailing 100, it is possible to prevent an accessory (for example, a hook bolt or a pad) for fixing the rail 2 to the installation location from being damaged.

  Next, a fixing structure for fixing the derailing prevention device 100 to the overhead crane 1 will be described with reference to FIGS.

  As shown in FIG. 3, the fixing structure includes a protrusion 113 provided on the fixing frame 110, a pair of mounting portions 150 disposed between the protrusion 113 and the pair of frames 21 of the overhead crane 1, Biasing means for biasing the protruding portion 113 upward with respect to the frame 21 so as to press the side surface of the portion 150 against the side surface of the frame 21. The pair of mounting portions 150 are connected to each other by a wire 150a to prevent loss.

  FIG. 6 is a diagram showing a relationship between the protruding portion 113 and the mounting portion 150, and is a diagram in which a part of the configuration in FIG. 3 is omitted for easy understanding.

  The protrusion 113 is a member that is fixed to the main body 111, protrudes from the main body 111 in the X-axis direction, and is formed so as to increase in width from the upper side to the lower side. In the embodiment, the width of the protrusion 113 means the width from one side surface to the other side of the protrusion, and the protrusion 113 has a part or the entire upper side. What is necessary is just to be formed so that width may become wide from below to the lower side.

  The protrusions 113 are fixed to both sides of a plane perpendicular to the X-axis direction of the main body 111 so as to extend in directions opposite to each other, for example, by welding or the like. The protrusion 113 is fixed to the center of the main body 111 in the width direction. Therefore, when the main body 111 is disposed between the pair of frames 21, gaps are formed between the protrusion 113 and the pair of frames 21.

  The protrusion 113 has a trapezoidal shape when viewed from the X-axis direction. The protruding portion 113 is formed such that the lower base is longer than the upper base. The angle formed by the lower base and the legs on both sides is the same, and the protrusion 113 has a symmetrical shape. The angle formed by the lower base and the legs on both sides is the distance between the pair of frames 21, the structure and material of the frame 21 and the fixed frame 110, the thickness of the protrusion 113, and the upward direction expected to be applied to the overhead crane 1. It is set in consideration of the magnitude of the load, the steepness, and the like, and is, for example, preferably in a range of about 10 ° to about 20 °, and more preferably about 15 °.

  The protruding portion 113 has a pair of female screw holes 113a formed in the X-axis direction, into which a bolt for connecting the holding plate 160 can be screwed. The female screw holes 113a are formed at intervals in the Y-axis direction.

  The mounting portion 150 is a plate-like member arranged in a gap formed between the projecting portion 113 and the pair of frames 21. The attachment portion 150 is formed of, for example, a metal material, and includes a wedge portion 151 and a stopper 152.

  When the protrusion 113 is pulled upward, the wedge 151 bites into the gap between the protrusion 113 and the frame 21, and converts the upward force on the protrusion 113 into a lateral force on the pair of frames 21. . The wedge portion 151 includes a side surface portion that contacts the side surface portion of the protrusion 113 and a side surface portion that contacts the inner surfaces of the pair of frames 21.

  The wedge portion 151 is formed so that the upper width is larger than the lower width corresponding to the trapezoidal shape of the protrusion 113, and the side surface of the wedge 151 that contacts the protrusion 113 is formed with the frame 21. It is inclined with respect to the contacting side surface. When the wedge portion 151 is disposed between the protrusion 113 and the pair of frames 21, each side surface of the wedge portion 151 comes into contact with the side surface of the protrusion 113 and the inner surface of the frame 21.

  The angle formed by the side surface contacting the protrusion 113 and the side surface contacting the frame 21 is an angle matching the angle formed by the lower base of the protrusion 113 and the legs on both sides, for example, about 10 °. Preferably it is in the range of ２０20 °, more preferably about 15 °.

  The stopper 152 extends in a horizontal direction from the lower side of the side surface of the wedge portion 151, and regulates the attachment portion 150 so as not to move upward. When the mounting portion 150 is disposed between the protrusion 113 and the frame 21, the top surface of the stopper 152 contacts the bottom surface of the frame 21.

  Returning to FIGS. 4 and 5, the compression spring 130 forms a part of a fixing structure for fixing the wheel release prevention device 100 to the overhead crane 1. The compression spring 130 is an example of an urging unit that urges the projecting portion 113 upward with respect to the pair of frames 21.

  As described above, the compression spring 130 urges the moving frame 120 downward with respect to the fixed frame 110. However, when the wheel portion 140 is installed on the rail 2, The fixed frame 110 is urged upward with respect to 120. At this time, the protrusion 113 fixed to the fixed frame 110 is urged upward by the compression spring 130 with respect to the pair of frames 21.

  Further, a holding plate 160 for preventing the pair of mounting portions 150 from falling off the fixed frame 110 and a hanging portion 170 installed on the upper surface of the pair of frames 21 and connected to the holding plate 160 are a pair of frames. This is an example of an urging unit that urges the protruding portion 113 upward with respect to 21.

  FIG. 7 is a front view showing a state in which the holding plate 160 and the suspension unit 170 are fixed to each other. The pressing plate 160 is a plate-shaped member that is connected to the fixed frame 110 via a bolt and restricts the movement of the mounting portion 150 in the X-axis direction, thereby preventing the mounting portion 150 from falling off from the protrusion 113. A gap may be formed in the X-axis direction between the holding plate 160 and the protrusion 113. Further, a pair of screw portions 161 arranged parallel to each other are fixed to the holding plate 160.

  The pressing plate 160 is, for example, a plate-shaped member formed of a metal material and in contact with the mounting portion 150, and includes a pair of through holes 160a arranged in a horizontal direction. The through-hole 160a is provided on the upper side with a portion that can pass through the head of the bolt, and on the lower side, a portion that can lock the shaft of the bolt and cannot pass through the head of the bolt. It has a so-called daruma shape.

  By letting the bolt fastened to the protruding portion 113 pass through the portion of the through hole 160a that can pass through the head of the bolt, and by locking the bolt to the portion of the through hole 160a that cannot pass through the head of the bolt, The holding plate 160 is connected to the protrusion 113. Thus, the pressing plate 160 can restrict the movement of the attachment portion 150 in the X-axis direction, and prevent the attachment portion 150 from falling off from the protrusion 113.

  The pair of screw portions 161 is an example of a long member in which male screws are formed from the distal end to the proximal end, and are fixed to the right and left sides of the holding plate 160 so as to be parallel to each other. The screw portion 161 is fixed to the holding plate 160 by welding or the like so as to extend upward from the holding plate 160 when the mounting portion 150 is disposed between the projecting portion 113 and the frame 21.

  The nut 162 is an example of a fixing member that is fastened to the screw portion 161 inserted into the through hole 172a so as to come into contact with the upper surface portion of the hanging portion 170, and restricts downward movement of the screw portion 161 that is pulled upward. It is.

  The suspension unit 170 is a long member having an L-shaped cross section and installed on the upper surface of the frame 21 of the overhead crane 1. The suspending portion 170 is formed of, for example, a metal material and includes a side surface portion 171 arranged on the YZ plane, and a bottom surface portion 172 extending from the lower end of the side surface portion 171 and arranged on the XY plane.

  The bottom surface portion 172 includes a through hole 172a into which the screw portion 161 can be inserted. When the holding plate 160 is fixed to the protruding portion 113 via a bolt, the screw portion 161 of the holding plate 160 is inserted into the through hole 172a of the hanging portion 170 installed on the upper surface of the frame 21. By fastening the nut 162 to the screw 161, the protrusion 113 connected to the holding plate 160 can be urged toward the suspension 170.

  Next, the principle by which the fixing structure fixes the wheel release prevention device 100 between the pair of frames 21 of the overhead crane 1 will be described. Hereinafter, it is assumed that the derailing prevention device 100 is disposed between the pair of frames 21 and is installed on the rail 2.

  First, since the wheel unit 140 fixed to the moving frame 120 is installed on the rail 2, the fixed frame 110 is urged upward by the compression spring 130 installed on the moving frame 120. Accordingly, the protruding portion 113 to which the pressing plate 160 is connected is also urged upward with respect to the pair of frames 21.

  In addition, the hanging portion 170 is installed on the frame 21 so that the long screw portion 161 is inserted into the through hole 172 a of the hanging portion 170, and the nut 162 is tightened from above the screw portion 161, so that the holding plate is 160 is pulled toward the suspension 170 and is urged upward. Accordingly, the protruding portion 113 to which the pressing plate 160 is connected is also urged upward with respect to the pair of frames 21.

  At this time, as shown in FIG. 6, the protrusion 113 is formed in a trapezoidal shape such that the width decreases from the lower side to the upper side, and the mounting parts 150 disposed on both sides of the protrusion 113 Since the width is configured to increase from the upper side to the upper side, the protruding portion 113 urged upward applies a force Fp to the mounting portion 150. Since the force Fp can be decomposed into a force Fz in the Z-axis direction and a force Fy in the Y-axis direction, the mounting portion 150 is urged to press the frame 21 by the force Fy in the Y-axis direction.

  Since the stopper 152 of the mounting portion 150 is in contact with the bottom surface of the frame 21, the mounting portion 150 does not move upward even if the mounting portion 150 is urged upward by the force Fz by the protrusion 113. . For this reason, the mounting portion 150 is pressed against the frame 21 with the force Fy by the protrusion 113, so that the frictional resistance between the protrusion 113, the mounting portion 150, and the frame 21 increases, and the mounting portion 150 is disengaged from the overhead crane 1. The wheel prevention device 100 can be firmly fixed.

  As described above, in the fixing structure according to the embodiment, the protrusion 113 is urged upward by the compression spring 130, and the failure occurs in the compression spring 130, and the protrusion 113 is urged upward by the compression spring 130. Even if the action of the protrusion 113 is lost, the protrusion 113 can be continuously urged upward by the pressing plate 160, the screw portion 161, the nut 162, and the hanging portion 170. For this reason, the derailing prevention device 100 can be stably fixed between the pair of frames 21.

  Next, a method of fixing the derailing prevention device 100 to the overhead crane 1 will be described. Hereinafter, the case where the derailing prevention device 100 is fixed to the overhead crane 1 while the overhead crane 1 is installed on the rail 2 will be described as an example.

  First, a bolt is fastened to the female screw hole 113a of the protrusion 113 of the fixed frame 110. This bolt is a stepped bolt that stops with a gap of about 10 mm between the head of the bolt and the protrusion 113 in order to lock the through hole 160a of the holding plate 160 with the shaft of the bolt. I have.

  Next, the fixed frame 110 is arranged between the pair of frames 21.

  Next, the mounting portion 150 is mounted in a gap between the protrusion 113 and the pair of frames 21. The mounting portion 150 can be mounted close to the fixed frame 110 from the longitudinal direction of the frame 21.

  Next, the through holes 160a of the holding plate 160 are inserted into the bolts fastened to the protruding portions 113 and locked. The through hole 160a is inserted into the bolt by passing the head of the bolt through a portion provided above the through hole 160a and capable of passing through the head of the bolt.

  Next, the suspension unit 170 is installed on the upper surface of the frame 21 so that the screw portion 161 is inserted into the through hole 172a of the suspension unit 170.

  Next, the nut 162 is tightened from the tip of the screw part 161 to make contact with the bottom part 172 of the suspension part 170, and the nut 162 is further tightened, so that the wedge part 151 and the stopper 152 of the mounting part 150 are The protrusion 113 is urged upward to such an extent that the protrusion 113 is slightly touched.

  Next, the moving frame 120 to which the wheel unit 140 is fixed is inserted into the fixed frame 110. At this time, the front end of the hanging jig on which the male screw is formed is tightened and fixed to the compression spring holding portion 122 of the moving frame 120, and the moving frame 120 is inserted into the fixed frame 110 while holding the hanging jig. I do. Finally, the movable frame 120 is arranged inside the fixed frame 110 such that the pair of extension portions 124 are oriented so as to sandwich the side surface of the rail 2.

  Next, the compression spring 130 is arranged inside the moving frame 120 arranged inside the fixed frame 110. The compression spring 130 is installed so as to contact the upper surface of the compression spring holding portion 122 of the moving frame 120.

  Next, the compression spring presser 112 is fixed to the upper surface of the main body 111 of the fixed frame 110 so as to press the compression spring 130 disposed inside the moving frame 120 from above. Describing in more detail, the compression spring holding portion 112 is installed on the upper surface of the main body portion 111, and a bolt is inserted into a through hole of the compression spring holding portion 112 until the compression spring holding portion 112 comes into close contact with the main body portion 111. A bolt is tightened into a female screw hole formed on the upper surface of the main body 111. By this step, the compression spring 130 urges the protrusion 113 upward, and the fixed frame 110 is fixed between the pair of frames 21.

  By tightening the nut 162 so that the through hole 160a of the pressing plate 160 and the bolt tightened to the protrusion 113 are in contact with each other, the protrusion 113 is urged upward with respect to the pair of frames 21. By this step, even when the compression spring 130 is damaged, the protrusion 113 is urged upward, and the fixed frame 110 is kept fixed between the pair of frames 21. Through the above steps, the fixing of the device for preventing derailing 100 to the overhead crane 1 is completed.

  As described above, in the fixing structure according to the embodiment, the projecting portion 113 is provided so as to project from the fixing frame 110 and is formed so as to increase in width from the upper side to the lower side. The mounting portion 150 is formed so as to be in contact with the side surface portion of the pair of frames 21 and the side surface portion and the lower surface portion of the pair of frames 21, and to increase in width from the lower side to the upper side. A compression spring 130 that urges the protruding portion 113 upward against the pair of frames 21 so as to press the side portion of the frame 21, a holding plate 160, and a hanging portion 170. For this reason, the derailing prevention device 100 can be firmly fixed to the overhead crane 1 without subjecting the overhead crane 1 to processing such as drilling.

  Further, in the fixing structure according to the embodiment, both side surfaces of the protrusion 113 are tapered, and the side surface of the mounting portion 150 is also tapered corresponding to the protrusion 113. For this reason, a force can be uniformly applied to the left and right frames 21, and as a result, the derailing prevention device 100 can be stably and firmly fixed.

(Modification)
The present invention is not limited to the above embodiment, and the following modifications are possible.

  In the above embodiment, the projection 113 has a trapezoidal shape when viewed from the X-axis direction, but the present invention is not limited to this. For example, the angles formed by the lower base and the legs on both sides may be different angles. Further, the shape of the protruding portion 113 is not limited to a trapezoidal shape whose width is widened from the upper side to the lower side when observed from the X-axis direction, and may be a shape in which at least a part becomes wider from the upper side to the lower side. It may be a triangle having vertices arranged on the upper side, a semicircle having an arc arranged on the upper side, an ellipse, a circle, or the like.

  In the above-described embodiment, the side surface portion of the mounting portion 150 that contacts the protrusion 113 has a planar shape and is obliquely inclined with respect to the side surface portion that contacts the frame 21. However, the present invention is not limited to this. I can't. For example, the side surface portion that comes into contact with the protrusion 113 may be a curved surface that is convex outward.

  In the above embodiment, the protruding portion 113 is provided at the center in the width direction of the side portion, but the present invention is not limited to this. For example, a configuration is provided in which a protrusion 113 is provided at a side end of a side surface portion so as to contact an inner surface of one frame 21, and a mounting portion 150 is disposed in a gap between the protrusion 113 and the other frame 21. May be.

  In the above embodiment, the protrusion 113 is pulled upward by using the screw 161, the nut 162, and the suspension 170 of the holding plate 160, but the present invention is not limited to this. For example, a long screw portion may be provided on the protrusion 113 to pull the protrusion 113 upward.

  In the above embodiment, the pair of extension portions 124 sandwich the head of the rail 2 to restrict the horizontal movement of the derailment prevention device 100, but the present invention is not limited to this. For example, by providing a pair of flanges that sandwich the head of the rail 2 on the wheel 143 of the wheel unit 140, the horizontal movement of the device for preventing wheel removal 100 may be restricted.

  Further, a guide roller rotatably supported around an axis extending in the X-axis direction may be provided on the pair of extension portions 124 so that the guide roller rolls on the side surface of the head of the rail 2. A rubber member and a spring for absorbing impact may be provided on the inner surfaces of the pair of extension portions 124.

  In the above embodiment, the cylindrical moving frame 120 is movably accommodated in the through hole at the center of the fixed frame 110 having a circular cross section, but the present invention is not limited to this. For example, in order to prevent the rotation of the moving frame 120 in the circumferential direction, a concave guide groove extending in the vertical direction is provided in the fixed frame 110, and the moving frame 120 is vertically slidably disposed in the guide groove. Protrusions may be provided.

  Further, the cross-sectional shape of the through hole at the center of the fixed frame 110 and the cross-sectional shape of the movable frame 120 are not limited to a circular shape, and may be, for example, a rectangular shape or an elliptical shape.

  In the above embodiment, the compression springs 130 are arranged in the internal spaces of the fixed frame 110 and the moving frame 120, but the present invention is not limited to this. For example, a spring guide that supports the compression spring 130 so as not to bend in the horizontal direction may be provided. The spring guide portion is an elongated member that extends downward from the inner surface of the upper surface of the compression spring holding portion 112 and is disposed inside the compression spring 130.

  In the above embodiment, the compression spring 130 is used as the urging means for urging the moving frame 120 with respect to the fixed frame 110, but the present invention is not limited to this. For example, the biasing means may be a leaf spring, a disc spring, an air spring, a tension spring, a bamboo shoot spring, a wave spring, rubber, an elastomer, or the like.

  In addition, a power unit such as a hydraulic cylinder or a motor may be provided on at least a part of the moving frame 120 to bias the moving frame 120 toward the head of the rail 2. A magnet or an electromagnet may be attached so that the wheel 140 is always in contact with the head of the metal rail 2 by the magnetic force of the magnet or the electromagnet.

  In the above-described embodiment, the wheel 143 of the wheel removal prevention device 100 is configured to contact the rail 2 and roll, but the present invention is not limited to this. For example, a plate-shaped sliding member formed of a material having good slidability and fixed to the lower end of the moving frame 120 may be configured to contact the rail 2.

  In the above embodiment, the two derailing prevention devices 100 are fixed between the pair of frames 21 of the overhead crane 1 at intervals in the X-axis direction, but the invention is not limited to this. For example, the number of wheel removal prevention devices 100 fixed between the pair of frames 21 may be one, or three or more. Further, it may be used in combination with a derailing prevention device of a type fixed to the end of the saddle 20 of the overhead crane 1.

  In the above embodiment, the derailing prevention device 100 is fixed to the overhead crane 1 installed on the rail 2, but the present invention is not limited to this. Before installing the overhead crane 1 on the rail 2, the derailment prevention device 100 may be fixed to the overhead crane 1. In this case, in a state where the derailing prevention device 100 is assembled in advance and fixed to the overhead crane 1, the compression spring 130 is compressed using a jig or the like, and the moving frame 120 is pushed into the fixed frame 110. Therefore, it is preferable to install the overhead crane 1 on the rail 2.

  In the above-described embodiment, an example in which the wheel removal prevention device 100 is applied to the overhead crane 1 has been described, but the application target of the wheel removal prevention device 100 is not limited to the overhead crane 1. For example, the derailment prevention device 100 may be applied to any rail traveling machine including a portal crane, a single portal crane, a railway vehicle, and a truck.

  The above embodiments are exemplifications, and the present invention is not limited to these. Various embodiments are possible without departing from the spirit of the invention described in the claims. The components described in each of the embodiments and the modified examples can be freely combined. The invention equivalent to the invention described in the claims is also included in the invention.

DESCRIPTION OF SYMBOLS 1 ... Overhead crane, 2 ... Rail, 10 ... Girder, 20 ... Saddle, 21 ... Frame, 22, 143 ... Wheel, 30 ... Hoisting machine, 31 ... Wire rope, 32 ... Hook, 100 ... Derailing prevention device, 110 ... fixed frame, 111 ... main body part, 112, 122 ... compression spring holding part, 112a, 172 ... bottom part, 112b ... cylindrical part, 112c ... top part, 112d ... convex part, 113 ... protruding part, 113a, 122b ... female screw Hole: 114: detent, 115: bush, 120: moving frame, 121: compression spring housing, 122a: recess, 123: wheel housing, 124: extension, 125: claw, 130: compression spring, 140 ... Wheel part, 141: Wheel axle, 142: Bearing, 150: Mounting part, 150a: Wire, 151: Wedge part, 152: Stopper, 160: Press plate, 60a, 172a ... through hole, 161 ... screw part, 162 ... nut 170 ... hanging portion, 171 ... side portion

Claims (7)

A fixing structure for fixing a structure between a pair of frames arranged in parallel with each other,
When the structure is disposed between the frames, a protrusion provided on the structure so as to protrude from the structure, and formed to increase in width from the upper side to the lower side,
When arranged in a gap formed between the frame and the protruding portion, the side portion of the protruding portion and the side surface portion and the lower surface portion of the frame are in contact with each other, and the width is increased from a lower side to an upper side. A mounting portion formed to be wide;
Urging means for urging the protruding portion upward so as to press the side portion of the mounting portion against the side portion of the frame;
Fixed structure comprising: The projecting portion is provided at a central portion in the width direction of the structure, and a cross section thereof is formed in a symmetric trapezoidal shape,
The attachment portion is disposed on each of the left and right sides of the protrusion, and is tapered between a side surface that contacts the protrusion and a side surface that contacts the frame.
The fixing structure according to claim 1. The attachment portion extends from a side surface portion thereof so as to contact a bottom portion of the frame, and includes a stopper that regulates upward movement of the attachment portion with respect to the frame.
The fixing structure according to claim 1. The urging means is provided between the structure and a portion where the structure is installed, and includes a compression spring that pushes the protrusion upward with respect to the frame.
The fixing structure according to claim 1. The urging means,
A holding plate fixed to the protruding portion and regulating the attachment portion so as not to fall off from the protruding portion;
A long member fixed to the holding plate and extending upward from the protrusion when the holding plate is fixed to the protrusion;
A suspension unit provided on the frame and having a through hole through which the long member is inserted,
A fixing member that is fixed to the elongated member inserted into the through hole so as to contact an upper surface portion of the hanging portion, and regulates downward movement of the elongated member,
Comprising,
The fixing structure according to claim 1. A fixing plate fixed to the projecting portion and regulating the attachment portion so as not to fall off from the projecting portion,
The fixing structure according to claim 1. A derailing prevention device fixed to a rail traveling machine including a pair of frames arranged in parallel with each other,
When the derailing prevention device is disposed between the frames, the derailing prevention device is provided on the derailing prevention device so as to protrude from the derailing prevention device, and is formed so as to increase in width from an upper side to a lower side. Projections,
When arranged in a gap formed between the frame and the protruding portion, the side portion of the protruding portion and the side surface portion and the lower surface portion of the frame are in contact with each other, and the width is increased from a lower side to an upper side. A mounting portion formed to be wide;
Urging means for urging the protruding portion upward so as to press the side portion of the mounting portion against the side portion of the frame;
A derailing prevention device comprising:

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