JPS6027069Y2 - Tow pin guide rail for trolley - Google Patents

Description

[Detailed description of the invention] The present invention is designed to minimize the tow pin path in an underfloor tow conveyor to prevent dust, foreign objects, etc. from falling from the path onto the conveyor chain running under the floor, and to prevent various objects that cross the tow pin path. This invention relates to a guide rail for a tow pin for a bogie in which the tow pin part inserted into the tow pin passage is a small diameter part in order to prevent the wheels of a working vehicle from falling down, and the purpose is to prevent wear and tear of the tow pin and to prevent the meandering of the bogie.

Conventionally, under-floor type tow conveyor was developed in 1988-935.
As disclosed in the 7R publication, a guide roller is attached to the tow pin passage insertion portion of a tow pin for a bogie, and the guide roller is guided by a guide rail to protect the tow pin and guide the bogie's travel. Since the tow pin falling path is formed as a groove on the floor surface, which is slightly wider than the diameter of the guide roller, the groove width becomes large even though the tow pin diameter is small, and dust, foreign matter, etc. can fall into the groove. There are many objects, and these fallen objects accumulate on the conveyor chain and the conveyor chain running path, impeding the smooth operation of the conveyor chain, and the wheels of other floor-moving work vehicles crossing the groove may fall into the groove. This caused significant obstacles to the movement of work vehicles.

Therefore, recently, as shown in Fig. 1, the lower end of the tow pin for a bogie, that is, the tow pin passage insertion part formed between the opposing end surfaces of the pit cover, is moved from the upper half of the tow pin without installing a guide roller. Furthermore, the passage width is made as narrow as possible by the small diameter portion, thereby solving the drawbacks of the conventional under-floor type tow conveyor.

In FIG. 1, a pair of left and right foundation frames 2 are set up in a pit 1 formed along a conveyor conveyance path, and a pair of chain rails 3 having a U-shaped cross section are placed on the frames with their opening sides facing each other. and guide the drive chain 4 inside the pair of chain rails 3.

An angle 5 is horizontally disposed at the upper end of the frame 2, and a pit cover 6 is attached between the angle 5 and the edge of the pit 1, and the upper surface of the cover is used as a foot for the truck.

Incidentally, the distance between the opposing end surfaces 7, 7 of the left and right pit covers 6 disposed between the left and right pit greens and the angle 5 is slightly larger than the bin width b' of the tow pin 8 of the truck.

The tow pin 8 of the truck 9, which can be freely moved in and out, is inserted between the end surfaces 7, 7 and engaged with the hook 10 of the drive chain 4, thereby transporting the truck 9.

At this time, the tow pin 8 travels guided by both end surfaces 7, 7 of the pit cover 6, but the end surface 7 is a cut surface, and the sliding contact area between the tow pin 8 and the end surface is small (thickness tX of the copper plate). Because the width of the line in the sliding direction is a (Fig. 2), the surface pressure (pressure force per unit area) during sliding contact becomes large, which increases wear on the tow pin 8 and end surface 7, which may cause the truck to meander. There is.

At the same time, since one end surface 7 of the pit cover serves as a guide for the toe pin, the guideline tends to be uneven, making it difficult to accurately determine the width of the kite and the guideline.

Further, since the end surface 7 as described above is a cut surface of a steel plate, the conventional bogie conveyor has a drawback that a so-called galling phenomenon easily occurs between the tow pin 8 and the end surface 7.

Therefore, the present invention eliminates the drawbacks of the one disclosed in Japanese Utility Model Application Publication No. 48-9357 and FIG. The first embodiment shown in the figure is a cross-sectional view of an underfloor tow conveyor including a guide rail of a tow bin for a bogie, and the cross sections are shown at the upper ends of a pair of left and right foundation frames 2, 2 erected in a pit 1. A pair of toe pin guide rails 11 that are U-shaped and have a vertical side 13.13 and a horizontal side 14.14.
, 11 with bolts 12 and 12, respectively, horizontal side 1
4 and 14 support the lower surface of the facing end of the pit cover 6.6 which becomes a tread surface for the bogie, and the vertical side 13.13 is provided close to and opposite to the small diameter part formed at the lower end of the tow pin 8. ．．
The distance between the tow pin guide surfaces of 13 is slightly wider than the small diameter width b' of the tow pin, and the distance between the opposing end surfaces 7, 7 of the pit cover 6.6 is equal to the distance between the toe pin guide surfaces of the vertical side 13.13. It is larger than the interval.

In other words, the guide surface of the small portion of the tow pin for the truck having a vertical side of 13.degree.

The distance between the vertical sides 13 and 13 is located directly above the conveyor chain 4.

Therefore, the small diameter portion of the tow pin 8 moves guided by the guide surfaces of the vertical sides 13, 13, but does not come into contact with the opposing end surfaces 7, 7 of the pit cover. In this example, a shape member 15 having an angular cross section on the left side and a shape member 16 having a U-shaped cross section on the right side are used as guide rails for tow pins of the truck.

In the second embodiment, the drive chain 4 is disposed at a position different from the center of the truck 9, and the chain rail 4
The trine 8 of the truck is indexed by a hook 17 extending horizontally from the top.

The frame member 15 having a rectangular cross section is horizontally protruding from the frame 1.
8 is fixed at the tip.

At the same time, the shape material 15 supports the tip of the pit cover 6 at a position where the tip does not protrude from the side surface of the shape material toward the tow bin,
Both are fastened together by a countersunk bolt 19.

Next, the effects of the present invention will be explained.

While driving the drive chain 4, the tow pin 8 of the truck is lowered, and the toe pin 8 is attached to the hook 1 of the drive chain 4.
0, the tow pin 8 of the truck travels guided by the guide rail and transports the truck 9.

At this time, the trine 8 of the truck is the vertical side 1 of the guide rail.
3. Since it is guided in sliding contact with the entire side guide surface of 13, the surface pressure on the sliding contact part of the toe pin is reduced, and the wear of the toe pin 8 and the guide rail is reduced, which would otherwise occur if the wear was large. 9 is prevented from meandering, and the tow bin 8 is
etc. has the effect of becoming a dog.

Furthermore, since this guide rail is made of a shaped material, and the side in sliding contact with the tow pin 8 is the rolled surface of the shaped material, the so-called galling phenomenon between the trine 8 and the guide rail during sliding contact does not occur, and the carriage 9 can always be transported smoothly. There are certain effects that can be achieved.

In addition, since the guide rail supports and fixes the tip of the pit cover 6, the pit cover 6 is firmly fixed and the bogie running path is stabilized.

Furthermore, when a shape material is used for the guide rail, since a long material can be used, the span and center position of the left and right shape materials can be easily and accurately arranged to the specified dimensions.

Therefore, there is an effect that the tow pin 8 of the truck can be indexed reliably and smoothly.

Furthermore, the structure is simple, the guide rail can be arranged at low cost, and when the guide rail is worn out, it can be easily replaced.

Moreover, since the toe pin movement passage groove is formed narrowly,
This reduces the amount of dust, foreign matter, etc. falling onto the chain and chain rail travel rail, making the chain rail run smoothly and making it easier for other work vehicles to cross the groove.

It should be noted that the present invention is of course not limited to the above embodiments, but can be applied to all types of tow pin-equipped cart conveyors.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a conventional bogie conveyor, Fig. 2 is a horizontal sectional view of a tow pin of the same bogie, and Figs. 3 and 4 are a first embodiment and a second embodiment of the guide rail of the present invention, respectively. 1 is a cross-sectional view of a bogie conveyor with an example; FIG. 1...Pit, 2...Foundation frame,
3. Curved chain rail, 4. Open drive chain, 5.
・Curved angle member, 6... Pit cover, 7.
・Curved end surface, 8... Tow pin, 9... Stand L 10, 17"" Hook, 11, 15, 16...
... Guide rail, 12 ... Bolt, 13.
...Vertical side, 14...Horizontal side, 18...
...Frame, 19...Countersunk bolt.

Claims (1)

[Scope of utility model registration request] A guide rail for a tow pin for a bogie whose small part is inserted into the pit cover, which has a horizontal surface that supports the lower surface of the pit cover, which serves as a road surface for the bogie, and opposing vertical sides that guide the tow pin for the bogie. A guide rail in which a tow pin guide surface for a bogie on a vertical side is arranged closer to a tow pin side for a bogie than both opposing end surfaces of the pit cover.