JP2001107631A - Sliding door mechanism for construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sliding door mechanism for construction machinery, by which the piling of soil and sand or the like onto a rail or a rail corresponding member is prevented and a sliding door can be moved smoothly at all times. SOLUTION: The sliding door mechanism for the construction machinery, in which the piling of soil and sand or the like onto rails or rail corresponding members is removed because foreign-substance removing mechanisms 16 are installed to the supporting member 13 of vertical rollers 6 and/or the rails and rail corresponding members of the rollers, the sliding door can be moved smoothly at all times, and the mounting of the rollers on soil and sand or the like and the damage of the rollers can be avoided in the sliding door for the construction machinery in which the door is engaged with the sliding rails set up at a plurality of positions containing the upper and lower sections of the front edge of a cab through the horizontal and vertical rollers and the door is slid along the side face of the cab, can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding door mechanism used in a construction machine.

[0002]

2. Description of the Related Art In recent years, especially in small and medium-sized construction machines, even when a door of a cab (operating cab) is opened on a swivel base during the work, the door is not protruded from the swivel base. A sliding door device as disclosed in Japanese Patent No. 12556 is increasingly used. This supports the door via rollers on slide rails laid on the inside, below and outside the front edge of the cab, and slides the door along the outside of the cab to open and close the door opening. Is what you do.

[0003] In the slide door device, the slide door is normally supported via a roller on a slide rail laid at a lower portion inside a front edge of the cab and an intermediate portion outside the cab. Of these, the lower part inside the front edge of the cab, as shown in FIG.
A rail supporting member 2 is disposed along a rail-equivalent member 1 provided so as to extend from the cab to the periphery thereof, and a U-shaped guide rail 3 opened downward on a ceiling portion of the supporting member 2 is provided. A horizontal guide roller 6 is provided at the upper end of a roller support member 5 having a base 5a fixed to the slide door D with a bolt 4 on the slide door D, and a vertical roller 7 is provided at the lower end of the support member 5 so as to be rotatable. The horizontal guide roller 6 is loosely fitted on the guide rail 3, and the vertical roller 7 is installed on the rail equivalent member 1.

Thus, when the slide door D is pulled by a handle or the like (not shown), the lower portion of the slide door D is supported by the vertical rollers 7 via the roller support members 5 and the guide rails 3 are moved by the horizontal guide rollers 6. It is guided to move.

[0005]

However, construction equipment is usually used on unpaved roads and muddy grounds.
At the lower inside of the front edge of the cab, earth and sand, crushed stones, etc.
For this reason, these soils and the like accumulate on the rail-equivalent member 1, and when the slide door D moves, especially the rolling of the vertical roller 7 is hindered, and the opening and closing of the slide door D becomes unsmooth. was there.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a construction machine slide door which eliminates accumulation of earth and sand on rails or rail-equivalent members in a construction machine slide door, and in which the slide door can always move smoothly. A sliding door mechanism for the vehicle.

[0007]

According to the present invention, there is provided a slide door mechanism for a construction machine according to the present invention, wherein a door is provided to slide rails installed at a plurality of locations including upper and lower front edges of a cab through horizontal and vertical rollers. And a sliding door for construction machinery that slides the door along the side surface of the cab, wherein a support member for the vertical roller and / or a rail and a rail-equivalent member of the roller are provided with a foreign matter removing mechanism. I do.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a slide tor mechanism for a construction machine according to the present invention will be described in detail with reference to FIGS. The same reference numerals as those in FIG. 7 indicate the same parts and locations. As shown in FIGS. 1 to 6, the sliding door mechanism of the present invention specifically and generally includes a foreign matter described below on one or both of a vertical roller supporting member, a rail of the roller, and a rail equivalent member. It has an exclusion mechanism.

FIG. 1 shows a roller support member 13 connected to the tip of an arm 11 extending from a slide door by a pin 12 with bolts 14 and nuts 15 on both sides.
The brush member 16 shown in FIG. 1 is attached as shown in FIGS. As shown in FIG. 2, the brush member 16 has a plurality of relatively long bristles 16b integrally vegetated on a plastic substrate 16a, for example, and a mounting portion 16c is provided.
The nut 15 is fixed to the nut.

In the slide door mechanism shown in FIG. 1 having the above-described structure, the roller support member 13 is supported by the vertical roller 7 by the movement of the slide door, and is guided by the guide rail 3 by the horizontal guide roller 6 so that the right and left in FIG. When moving, the bristles 16b of the brush member 16 attached to both sides of the roller support member 13 can remove earth and sand, crushed stones and the like on the rail equivalent member 1. Therefore, the vertical roller 7 between the brush members 16 is not affected by soil and the like, and the slide door opens and closes smoothly.

FIG. 4 shows a plate-like member 18 formed by bending both sides of a roller support member 17 connected to the tip of an arm 11 extending from a slide door by pins 12 so as to be inclined. is there. The plate-shaped body 18 may be attached to the roller support member 17 with a bolt, a nut, or the like as a separate body in addition to being provided integrally with the roller support member 17 as described above. The hanging length of the plate-shaped body 18 is determined so as to have a slight gap between the lower end thereof and the rail equivalent member 1.

In the sliding door mechanism shown in FIG. 4 having the above structure, the roller supporting member 17 is supported by the vertical roller 7 by the movement of the sliding door, and is guided by the guide rail 3 by the horizontal guide roller 6 so that the right and left in FIG. When moving, the plate-like members 18 provided on both sides of the roller supporting member 17 can remove earth and sand, crushed stones and the like on the rail equivalent member 1 to the outside of the cab. Therefore, the vertical roller 7 between the plate-like members 18 is not affected by soil and the like, and the slide door opens and closes smoothly.

The one shown in FIG. 5 may be provided alone or in combination with the one shown in FIGS. 1 and 4 above.
Are suspended from the entire front end of the rail support member 2, and a lower film 20 made of rubber or synthetic resin is similarly raised from the entire front end of the rail equivalent member 1. When emphasis is placed on preventing intrusion of earth and sand, the operability of the slide door is slightly sacrificed, and the upper and lower membranes 1 are reduced.
It is conceivable to use a slightly thicker material for 9 and 20 so that the lower end and the upper end of the roller supporting member 5 overlap each other except where the roller supporting member 5 projects.

In the sliding door mechanism shown in FIG. 5, the front end of the rail support 2 and the rail-equivalent member 1
Is closed by the upper film body 19 and the lower film body 20, so that intrusion of earth and sand into the guide rail 3 and the rail equivalent member 1 is eliminated. In addition, even when the roller support member 5 is supported by the vertical roller 7 by the movement of the slide door and is guided by the guide rail 3 by the horizontal guide roller 6 and moves left and right in FIG. Lower membrane 19,2
There is no problem because it protrudes from between 0 and moves so as to separate the two membranes 19 and 20. However, when it is considered that the upper and lower membranes 19 and 20 cannot prevent the intrusion of the earth and sand, it is preferable to combine them with those shown in FIGS.

FIG. 6 may be provided alone or in combination with the one shown in FIG. 1, FIG. 4 or FIG. Both sides of the locus 21a of the roller 7 are lowered like 21b and 21c. Such a lowland part 21b, 2
By providing 1c, soil and the like that have entered the rail-equivalent member 21 rarely remain on the locus 21a,
It falls out of the lowland portion 21b or falls into the lowland portion 21c, and does not greatly hinder the rolling of the vertical roller 7.

[0016]

Embodiments shown in FIGS. 1, 4, 5 and 6 described above can be implemented individually or in combination as appropriate. For example, a plate-like body 18 shown in FIG. 4 may be provided outside the brush member 16 in FIG. Also, the combination of the combination shown in FIG. 5 and the combination shown in FIGS. 1 and 4 and the combination shown in FIG. 6, and the combination of the combination shown in FIG. 5 and the combination shown in FIG. Good. In short, what is considered to be effective may be combined as needed.

[0017]

According to the present invention, there is provided a slide door mechanism for a construction machine.
Engage the door with horizontal and vertical rollers on slide rails installed at multiple locations including the top and bottom of the front edge of the cab,
In a construction machine slide door for sliding a door along the side of a cab, a support member for the vertical roller and / or a rail and a rail-equivalent member of the roller are provided with a foreign matter removing mechanism. Sliding door mechanism for construction machinery that eliminates the accumulation of earth and sand on rail-equivalent members, always allows the sliding door to move smoothly, and further prevents the rollers from riding on earth and sand and damaging the rollers. There is an effect that can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of the vicinity of a roller support member in a first example of a slide door mechanism for construction equipment according to the present invention.

FIG. 2 is a perspective view of a brush member used in FIG. 1;

FIG. 3 is a cross-sectional view of the brush member used in FIG.

FIG. 4 is a perspective view of the vicinity of a roller support member in a second example of the slide door mechanism for a construction machine according to the present invention.

FIG. 5 is a partial cross-sectional front view of the vicinity of a roller supporting member in a third example of the sliding door mechanism for construction equipment according to the present invention.

FIG. 6 is a partial cross-sectional front view of the vicinity of a roller support member in a fourth example of the slide door mechanism for construction equipment according to the present invention.

FIG. 7 is a partial cross-sectional front view of the vicinity of a roller support member of a conventional construction machine slide door mechanism.

[Explanation of symbols]

 1, 21 rail equivalent member 2 rail support member 3 U-shaped guide rail 4, 14 bolt 5, 13, 17 roller support member 5a base 6 horizontal guide roller 7 vertical roller 8, 10 horizontal guide roller 11 arm 12 pin 15 nut 16 brush Member 16a Substrate 16b Bristle 16c Mounting part 18 Plate 19 Upper film 20 Lower film 21a Trace 21b, 21c Lowland D slide door.

Claims (5)

[Claims] 1. A sliding door for a construction machine in which a door is engaged with slide rails installed at a plurality of positions including a top and a bottom of a cab via horizontal and vertical rollers, and the door is slid along a side surface of the cab. And a support member for the vertical roller and / or a rail and a rail-equivalent member of the roller provided with a foreign matter removing mechanism. 2. The slide door for a construction machine according to claim 1, wherein said foreign matter removing mechanism is a brush member, which is installed on a side surface of a support member of said vertical roller with brush down. mechanism. 3. A slide toe mechanism for a construction machine according to claim 1, wherein said foreign matter removing mechanism is a plate-like body, which is provided on a side surface of a support member of said vertical roller. 4. The construction machine according to claim 1, wherein said foreign matter removing mechanism is a cover made of an elastic member which covers a space between a support member of said vertical roller and a cab component adjacent to said support member. Slide tor mechanism. 5. A slide toe mechanism for a construction machine according to claim 1, wherein said foreign matter removing mechanism is a rail or a rail-equivalent member for said roller formed on both sides of a locus of said vertical roller.