JPH10157974A - Running trolley - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform switching operation of a clutch with small force. SOLUTION: Between an electric motor for driving a running roller 3 and the running roller 3, a clutch device is provided. A pair of operating levers 25, 26 for operating the clutch device are protruded in an opposite direction to each other from a clutch device housing toward a running direction, and these operating levers 25, 26 are turned with the clutch device housing serving as the center, so as to perform switching operation of the clutch device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a traveling trolley.

[0002]

2. Description of the Related Art Traveling trolleys are known in which a traveling roller is provided on a traveling rail and a clutch device is disposed between a driving shaft connected to a manual driving source and a driven shaft connected to the traveling roller. See JP-A-55-46445). In this traveling trolley, an operation lever for operating the clutch device is mounted on the outer surface of the clutch device housing so as to be swingable in a plane perpendicular to the traveling direction.

[0003]

However, since the running rail is present in a plane perpendicular to the running direction, if the operating lever of the clutch device is lengthened, the operating lever is moved to the running rail when the operating lever is operated. It collides and therefore the length of the operating lever cannot be made sufficiently long. As a result, there is a problem that a large force is required for the disengagement operation of the clutch device. Further, there is a problem that if the operation lever extends in a plane perpendicular to the traveling direction, there is a high risk of interference with surrounding articles.

[0004]

According to the present invention, there is provided a running roller which rolls on a running rail, and a drive shaft connected to a driving source and a running roller connected to the running roller. In a traveling trolley in which a clutch device is disposed between driven shafts, a pair of operating levers for operating the clutch device are protruded from the clutch device housing in opposite directions toward the traveling direction, and these operating levers are centered on the clutch device housing. By rotating the clutch device, the switching operation of the clutch device is performed.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
The reference numeral 2 designates a traveling rail having an I-shaped section extending in the horizontal direction, and 2 designates a traveling trolley which is made to travel along the traveling rail 1 by four traveling rollers 3. The traveling trolley 2 includes a frame 4 spaced apart from each other, a guide roller 5 rotatably supported by the frame 4 and rolling on an edge of a lower flange portion of the traveling frame 1, And a rod 6 bridging between the lower ends, on which an electric hoist 7 is hung, for example. As shown in FIG. 1, a clutch device 8, a reduction gear 9, and an electric motor 10 are mounted on the outer surface of one frame 4.

FIGS. 3 to 5 show the clutch device 8 of FIG. 3 to 5, reference numeral 11 denotes a drive shaft rotatably supported in the clutch device 8, and reference numeral 12 denotes a driven shaft rotatably supported in the clutch device 8 and aligned with the drive shaft 11, respectively. Show. Drive shaft 11
A gear 13 of the reduction gear 9 is attached to the outer end of the drive shaft 1.
1 is transmitted. On the other hand, the outer end of the driven shaft 12 has a gear 1
4 are formed, and the gears 14 are gears 15 (FIG. 1) respectively formed on the back surfaces of a pair of adjacent running rollers 3.
Meshes with Accordingly, when the driven shaft 12 is rotated, the pair of running rollers 3 is rotated accordingly.

The inner end of the drive shaft 11 and the inner end of the driven shaft 12 are connected to each other via a clutch 16. The clutch 16 includes a clutch half 16a fixed to the inner end of the drive shaft 11 and a clutch half 16b slidably fitted to a spline 17 formed at the inner end of the driven shaft 12.
Consists of Each of the clutch halves 16a and 16b has a U-shaped arm 18 at the tip thereof, and the drive shaft is driven when the arm 18 of the clutch half 16a is engaged with the arm 18 of the clutch half 16b. 11 is transmitted to the driven shaft 12.

A clutch operating ring 19 is disposed around the inner end of the clutch half 16b. The ring 19 is supported by a bearing 20 slidably inserted on the driven shaft 12. The ridge 16c formed on the outer peripheral surface of the inner end of the clutch half 16b is held by the inner end of the ring 19, so that the clutch half 16b moves as the ring 19 moves. A compression spring 21 for urging the ring 19 toward the clutch 16 is attached to the ring 19.
Is attached. The driven shaft 12 and the clutch 16 are surrounded by a housing 22 having a substantially rectangular contour, and openings 23 and 24 are formed on both flat sides of the housing 22 extending in a substantially vertical plane. Mounted on the ring 19 are a pair of cylindrical operating levers 25, 26 which penetrate the corresponding openings 23, 24 and extend in the running direction in opposite directions to the driven shaft 12. Hand chains 27 and 28 for manual operation are suspended from outer ends of the operation levers 25 and 26, respectively.

As described above, the ring 19 includes the compression spring 21
Is biased toward the clutch 16 by the spring force of
Accordingly, each operating lever 25, 26 is provided with a corresponding opening 23, 2
4 is pressed against the edges 29 and 30 on the side of the reduction gear 9. When the operating levers 25 and 26 are rotated around the driven shaft 12, the operating levers 25 and 26 are turned to the corresponding openings 23 and 24.
Move along the edges 29, 30 of the
Reference numeral 30 denotes a cam surface for guiding the operation levers 25 and 26.

As shown by the solid line in FIG.
3 has an upper portion 29a extending substantially vertically.
And a lower portion 29b extending obliquely downward from the lower end of the upper portion 29a. On the other hand, the cam surface 30 of the opening 24 is
3 is point-symmetric with respect to the cam surface 29 and the driven shaft 12. Therefore, as shown by the broken line in FIG. 4, the lower portion 30a of the cam surface 30 of the opening 24 extends substantially vertically, and the upper portion 30b of the cam surface 30 extends obliquely upward from the upper end of the lower portion 30a. .

When the operating levers 25 and 26 are pressed against the lower end of the lower cam surface portion 29b and the upper end of the upper cam surface portion 30b as shown in FIG. In the engaged state. At this time, the traveling roller 3 is driven to rotate by the electric motor 10. On the other hand, the operation levers 25 and 26 are connected to the driven shaft 12.
When the respective operating levers 25 and 26 are moved to positions where they are pressed against the upper cam surface portion 29a and the lower cam surface portion 30a, the clutch half 16b is moved in a direction away from the clutch half 16a. Thus, the engagement of the clutch 16 is released. At this time, traveling trolley 2
Can be moved manually. The manual movement of the traveling trolley 2 is used, for example, when finely adjusting the position of the traveling trolley 2 so that the traveling trolley 2 is located directly above the load.

As shown in FIGS. 1 and 2, in the embodiment according to the present invention, each operating lever 25, 26
Along the running direction. Operation levers 25, 26
No matter how long it is in the running direction, it does not get in the way. Therefore, the length of the operation levers 25 and 26 can be made sufficiently long, so that the switching operation of the clutch 16 can be performed with a small force. In addition, even if each of the operation levers 25 and 26 is extended in the traveling direction, the cam surface 29,
The housing 30 is formed on the housing 22. In this case, the cross-sectional shape of the housing 22 is rectangular so that the openings 23 and 24 can be easily formed.

[0013]

The clutch switching operation can be performed with a small force.

[Brief description of the drawings]

FIG. 1 is a front view of the entire traveling trolley.

FIG. 2 is a side view of the entire traveling trolley.

FIG. 3 is a plan sectional view of the clutch device.

FIG. 4 is a side view of the clutch device.

FIG. 5 is a sectional view taken along line VV in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Running rail 2 ... Running trolley 3 ... Running roller 8 ... Clutch device 10 ... Electric motor 25, 26 ... Operating lever

Claims (1)

[Claims] The clutch device is operated on a traveling trolley including a traveling roller that rolls on a traveling rail, and a clutch device disposed between a drive shaft connected to a driving source and a driven shaft connected to the traveling roller. Traveling trolley having a pair of operating levers projecting from the clutch device housing in the running direction in opposite directions to each other, and rotating the operating levers about the clutch device housing to perform a switching operation of the clutch device. .