JP3471299B2 - Wheel unit for transporting heavy objects - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transporting direction for transporting heavy objects such as a large transformer, a large machine tool, and a heating / cooling device, and other items. The present invention relates to a wheel unit for transporting heavy goods, which is capable of achieving easy conversion and stable straight running performance. 2. Description of the Related Art Conventionally, various types of goods have been transported using a bogie having traveling wheels attached to the lower surface of a bogie main body, and the conveyed goods are mounted on the base with the bogie. It is supposed to be moved. The traveling wheels attached to the underside of the bogie main body are rotatable in the horizontal direction so that the traveling direction can be freely set, and the wheels are supported by a rotatable base fixed to the underside of the bogie main body. It was moved while matching the transport direction. [0003] At this time, when the change of the transport direction is set, for example, a traveling wheel mounted on four front, rear, left and right corners of a lower surface of a bogie is used by utilizing the fact that the wheel is supported by a rotating base so that the direction can be freely changed. Of these, only the front part is forcibly changed in direction so as to be along the carrying direction and is carried and moved. [0004] However, in various factories, construction sites and the like for carrying in and out heavy objects such as large transformers, large machine tools, and cooling and heating equipment, etc.
When moving these heavy objects to a predetermined place, it is sometimes difficult to change the direction due to the weight when trying to change the carrying direction. Accordingly, the present invention has been made in view of the above-mentioned various circumstances as described above, and is intended to easily change the direction of transportation during transportation and to facilitate straight traveling when carrying heavy objects or other objects. It is an object of the present invention to provide a wheel unit for carrying heavy goods, which can be obtained. In order to solve the above-mentioned problems, according to the present invention, there is provided a weight wheel having wheels supported on a lower surface of a unit base 10 fixed to a lower surface of a bogie base. In the unit 1, the weight wheel unit 1 includes a frame F in which a unit base 10 is rotatably supported on a central upper surface, and a pair of left and right auxiliary wheels 16, 18 is rotatably supported on a lower surface in a running direction. Two axles 2 on the same axis orthogonal to the running direction on the lower surface at the center of F
4 and 26, a pair of weight wheels 28 and 30 rotatably supported independently of each other, and clutch members 32 and 34 at the ends of the axles 24 and 26 which are close to and opposed to the weight wheels 28 and 30, respectively. A connecting member 35 for connecting and disconnecting the two clutch members 32 and 34 by movement, and an operation supported by the frame F to move the connecting member 35 left and right by an operation from the outer side surface of the frame F. And means 38. The operating means 38 includes the axles 24, 2
An operation shaft 40 rotatably supported by the frame F in parallel with the six axes and a screw 42 is screwed into a predetermined portion on one side, and an operation shaft 40 operable from the outer side surface of the frame F, and a position close to the operation shaft 40. One shaft end is juxtaposed and connected and supported by the frame F via a compression spring 44 on the same axis.
A working shaft 48 having a shifter 46 engaged with the support member 5 at an intermediate portion thereof; and a working shaft 48 pressed and urged by the compression spring 44.
And a pressing body 50 screwed to the screw 42 of the operation shaft 40 so as to abut on the other end of the pressing shaft 50. In the heavy load carrying wheel unit 1 according to the present invention, the connecting member 35 is moved by the operation of the operating means 38 to connect or disconnect the heavy wheels 28, 30. Let it. Double weight wheels 28, 30
When they are connected to each other, the heavy wheel unit 1 travels straight, and when the two heavy wheels 28 and 30 are disconnected from each other, the running direction of the heavy wheel unit 1 itself can be changed. In addition, a load is generated when the shifter 46 is moved by the operation of the operating means 38 to connect the connecting member 35 engaged with the clutch member 34 at the shaft end of one axle 26 to the other clutch member 32. In this case, the load is absorbed by pressing the shifter 46 with only the urging force of the compression spring 44. Further, when the moved connecting member 35 is returned to the original position, it is smoothly performed by the restoring action of the compression spring 44 to which the elastic force is applied. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. Reference numeral B shown in FIG. 1 denotes a carriage on which various types of articles P are placed and transported. The wheel unit 1 for transporting heavy goods of the present invention is arranged and fixed to a part of a plurality of wheel units arranged at four corners of the bottom surface of the truck unit B. The bogie unit B can travel, for example, in the direction of the arrow, and the heavy load carrying wheel unit 1 (hereinafter referred to as the heavy load wheel unit 1) is disposed on both sides rearward in the traveling direction. Caster unit 2 on both sides in front
However, a universal electric unit 3 is arranged and fixed at the center of the parts. That is, the weight wheel unit 1 is shown in FIG.
As shown in FIG. 5, a disk-shaped unit base fixed to the lower surface of the bogie base B or disposed on the lower surface so as to support the goods P via the bogie base B. 10 is rotatably connected and supported. The weight wheel unit 1 itself includes a frame F
Unit base 1 on a support surface 12 protruding from the center of
0, which is rotatably connected and supported via a support 14 fixed to the center of the frame F, and is rotatably supported on the lower surface of the frame F in the front and rear direction in the running direction, and has, for example, hard urethane rubber (HSA95) mounted on its outer periphery. A pair of auxiliary wheels 16,1
8 and 2 which are independently rotatably supported on the same axis line on the central lower surface of the frame F and orthogonal to the running direction.
Weight axles 24, 26, and weight wheels 28, 30 fitted to the two axles 24, 26 via a key K and having, for example, urethane rubber (hardness HSA85) mounted on the outer periphery.
And the axle 24, which is opposed to the weight wheels 28, 30
26, clutch members 32, 3 attached to the shaft ends, respectively.
4, a connecting member 35 that moves between the two clutch members 32 and 34 to connect and disconnect the two clutch members 32 and 34;
Locking into a ring groove G formed on the outer periphery of the connecting member 35,
An operating means 38 supported by the frame F so that the connecting member 35 can be moved to the left and right by an operation from the outer side surface of the frame F. Further, one axle 24 supporting the weight wheels 28, 30 is rotatably supported by a pair of left and right frames F1, F2 constituting one side of the frame F, and the other axle 26 is And a pair of axles 2 on a pair of left and right opposite frames F3 and F4 constituting the other side of the frame F.
4 and rotatably supported on the same axis. The shaft ends of the two axles 24 and 26 project outward from the outer frames F1 and F4, respectively, and these projecting portions are formed as projecting operating portions 24a and 26a. Is formed in a hexagonal cross section so that can be detachably mounted. Next, the operation means 38 for integrating or separating the heavy wheels 28 and 30 will be described.
The operating means 38 is rotatably supported by the frame F so as to be rotatable in parallel with the axes of the two axles 24 and 26, and a screw 42 is screwed into a predetermined portion on one side. , 40b, and an operation shaft 40 that is rotated by an operation handle H mounted on the operation shaft 40, and a compression shaft that is juxtaposed at a position close to the operation shaft 40 and whose one shaft end is hung on the support shaft 45 of the frame F4 on the same axis. An operating shaft 48 pressed and urged by a spring 44, a shifter 46 having a thin-walled shifter arm 46 a supported by an intermediate portion of the operating shaft 48 and engaged with the connecting member 35, and a compression spring 44 The pressing member 50 is screwed to the screw 42 of the operation shaft 40 so as to abut on the other end of the working shaft 48 by being pressed and urged. The pressing body 50 is formed of a rectangular block, and a long groove 52 having a predetermined width is formed parallel to the working shaft 48 and opens on the working shaft 48 side of the block. A contact surface 52a is formed. More specifically, a screw 48a is screwed into a portion of the working shaft 48 where the shifter 46 is mounted, and a flange 48b having a predetermined thickness is formed at an end of the screw 48a (on the side where the compression spring 44 is disposed). Have been. Next, an example of use of this will be described.
As shown in FIGS. 4 and 5, the internal teeth formed on the inner periphery of the connecting member 35 mesh with the external teeth formed on the outer periphery of the clutch member 34 at the end of the axle 26, In this state, the weight wheels 28 and 30 are separated from each other and can rotate independently. Therefore, in this state, the heavy wheels 2
8, 30 can be rotated independently, so that when an external force is applied in the lateral direction, a turning motion occurs around the support body 14, whereby the weight wheel unit 1
Turns around the heavy wheels 28 or 30, and can be turned in either the left or right direction by the rotation difference. In this way, it is possible to easily change the transport direction of the heavy-weight wheel unit 1 that travels straight during transport. In this case, by rotating the operating handle H at the end of the operating shaft 40, the pressing body 50 is moved to the left (in the direction of the arrow) via the rotating screw 42. At this time, the end of the working shaft 48 is urged by the action of the compression spring 44 against the contact surface 52a at the end of the pressing body 50 on the long groove 52 side. The shifter 46 is moved in the same direction by the movement following the left row of 50. At the same time, the movement of the shifter 46 causes the connecting member 35 to move from the clutch member 34 at the end of the axle 26 of the heavy wheel 30 and mesh with the external teeth on the outer periphery of the clutch member 32 on the other heavy wheel 28 side. I do. If the connecting member 35
If the operating handle H is kept rotating despite the teeth of the clutch member 32 not engaging with the compression spring 4
4 can be compressed to absorb its load, and
When moving in the opposite direction, it is possible to use the elasticity of the compression spring 44 to help return to the original position. In this manner, the connecting member 35 is engaged between the two clutch members 32 and 34 so as to be opposed to each other.
By connecting the wheels 4 and 26 and linking the heavy wheels 28 and 30, the transport direction of the heavy wheel unit 1 can be easily changed to the straight traveling direction. Again, when the interlocking of the heavy wheels 28 and 30 is to be disconnected, the operating handle H is rotated and the screw 42 of the operating shaft 40 is reversed, so that the contact surface 52a of the pressing body 50 is rotated.
Through the action shaft 48 against the compression spring 44, and the connecting member 35 engaged with the shifter 46 is disengaged from the clutch member 32 on the one heavy wheel 28 side to the other heavy wheel 3
It moves to the clutch member 34 on the 0 side. When the connecting member 35 is moved, the flange 48b having a predetermined thickness of the operation shaft 40 comes into contact with the side wall of the frame F3.
It can be positioned at a regular position (a position where the coupling member 35 and the clutch member 34 are engaged and completely separated from the clutch member 32). When the coupling member 35 is engaged with the clutch member 32 when the teeth are out of phase with each other, or when one or both of the heavy wheels 28 and 30 with a load are slightly applied. When rotating, the operation handle or the operation lever is moved to the protruding operation section 2
It can be easily rotated by attaching to 4a, 26a. Since the present invention is configured as described above, the connecting member 35 can be moved to connect or disconnect the heavy wheels 28, 30 by operating the operating means 38. Thereby, even if the heavy object transporting wheel unit 1 is used to place and transport a considerably heavy object P,
It is possible to easily change the direction of transportation during transportation and to achieve straight running. That is, when the vehicle is traveling straight, the right and left heavy wheels 28 and 30 are integrated with each other by the connecting member 35 so that the two heavy wheels 28 and 30 are simultaneously rotated synchronously in the same direction. Is secured, and the connecting member 35 can freely rotate by releasing the connection between the two heavy wheels 28 and 30.
This makes it easy to change the direction of transport of the vehicle. By operating the operating means 38, the operating member 38 moves the shifter 46 to connect the connecting member 35 engaged with the clutch member 34 at the shaft end of one axle 26 to the connecting member 35.
When a load is generated due to disengagement when the clutch member 32 is engaged with the other clutch member 32, the load is absorbed by pressing the shifter 46 only by the urging force of the compression spring 44, and the clutch members 32, 34 or Damage to related parts such as the shaft 42 and the screw 42 screwed to the pressing body 50 can be prevented. Further, when returning the connecting member 35 moved by the operation of the operation means 38 to the original position, the compression spring 44
Can be smoothly performed by the restoring action generated by releasing the elastic resilience imparted to the.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a trolley using a heavy load carrying wheel unit according to an embodiment of the present invention. FIG. 2 is a side view showing a partial cross section of a heavy load carrying wheel unit according to the embodiment of the present invention. FIG. 3 is a plan view of FIG. 2; FIG. 4 is a sectional view taken along line AA of FIG. 2; FIG. 5 is a sectional view taken along line BB of FIG. 4; [Description of Signs] 1 ... Wheel unit for transporting heavy objects (Wheel unit for heavy) 2 ... Caster unit 3 ... Universal electric unit 10 ... Unit base 12 ... Support surface 14 ... Support body 16, 18 ... Auxiliary wheels 24, 26 ... Axles 24a, 26a ...
Projection operation parts 28, 30 Wheels for weight 32, 34 Clutch member 35 Connection member 38 Operation means 40 Operation shafts 40a, 40b
Projecting part 42 ... Screw 44 ... Compression spring 45 ... Support shaft 46 ... Shifter 46a ... Shifter arm 48 ... Working shaft 48a ... Screw 48b ... Flange 50 ... Pressing body 52 ... Long groove 52a ... Contact surface B ... Dolly base F ... Frame F1, F2, F
3, F4 ... Frame G ... Ring groove H ... Operating handle K ... Key P ... Cargo

Claims (1)

(1) A weight wheel unit having wheels supported on a lower surface of a unit base fixed to a lower surface of a bogie base, wherein the weight wheel unit has a unit base on a central upper surface. A frame rotatably supported on the lower surface and a pair of left and right auxiliary wheels rotatably supported before and after in the traveling direction, and two axles on the same axis line on the central lower surface of the frame and orthogonal to the traveling direction. A pair of weight wheels rotatably supported independently of each other, and a clutch member provided at each of the axle shaft ends which are close to and opposed to the weight wheels, and a connection for connecting and disengaging the two clutch members by moving the two clutch members. And a control means supported by the frame to move the connecting member to the left and right by an operation from the outside of the frame. The control means is rotatably supported by the frame in parallel with the axle axis. At the same time, a screw is screwed at a predetermined portion on one side, and an operation shaft operable from the outer side surface of the frame, and one end of the shaft is juxtaposed at a position close to the operation shaft and one end of the shaft is on the same axis via a compression spring A working shaft having a shifter, which is connected and supported by the frame and is engaged with the connecting member, supported at an intermediate portion, and a screw of the operating shaft which is in contact with the other end of the working shaft pressed and urged by the compression spring. A wheel unit for transporting heavy loads, characterized by comprising a combined pressing body.