JP2018150007A - Seal structure for door for mobile crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal structure for a door in which a door hardly protrudes outside a surface of a side panel.SOLUTION: There is provided a seal structure S for a door of a mobile crane. The seal structure S for a door includes: an operator cab 18 having an entrance 30 for entering or exiting at a lateral face 18a; a door 40 for closing the entrance 30; a weather strip 43 installed in a circumference of the door 40; and a seating face 33 for the weather strip 43 which is installed in a circumference of the entrance 30. The seating face 33 for the weather strip 43 is formed so as to be inclined on an indoor side of the operator cab 18.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a door seal structure for a mobile crane.

  2. Description of the Related Art Conventionally, a work vehicle including a mobile crane sometimes uses a sliding open / close type sliding door as a cab door so that it can be opened and closed even in a narrow place. For example, Patent Document 1 discloses a sliding door in which an elastic stopper provided with a recessed portion capable of embedding a guide roller from the left and right directions at an end portion of a guide rail is disclosed.

JP-A-7-81423

  However, in the sliding door of Patent Document 1, when the door is closed, the upper part of the rear end side of the door having relatively low rigidity is subjected to the weather strip reaction force and is out of the plane of the side panel (outside). There was a case of deformation to jump out.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a door seal structure in which the door is not likely to jump out of the side panel of the cab.

  In order to achieve the above object, the door seal structure of the mobile crane of the present invention is installed on the side of the operator's cab having an entrance / exit for entrance / exit, a door for closing the entrance / exit, and a peripheral edge of the door. A weather strip, and a seating surface of the weatherstrip installed at the periphery of the entrance, and the seating surface of the weatherstrip is formed to be inclined toward the indoor side of the cab.

  Thus, the door seal structure of the mobile crane according to the present invention includes a driver's cab having a doorway, a door, a weatherstrip installed on the periphery of the door, and a weatherstrip installed on the periphery of the doorway. And a seat surface of the weather strip is formed to be inclined toward the interior side of the cab. With this configuration, the door is unlikely to jump out of the side panel of the cab.

It is a side view of a mobile crane. It is a side view of a driver's cab. It is explanatory drawing of the structure of a driver's cab. (A) is the front view which removed the door and was seen from the inside, (b) is a side view of the cab of the state where the door was removed. It is explanatory drawing explaining the inclination of the seat surface of a weather strip. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Hereinafter, a rough terrain crane will be described as an example of the mobile crane, but the present invention is not limited to this. The present invention can be applied to other mobile cranes such as an all terrain crane.

(overall structure)
First, the whole structure of the rough terrain crane 1 as a mobile crane is demonstrated using FIG. A rough terrain crane 1 according to the present invention includes, as shown in FIG. A swivel base 12 is mounted so as to be capable of swiveling, and a boom 14 is mounted on a bracket 13 erected on the swivel base 12.

  The outrigger 11 can be slid out / stored in the width direction from the vehicle body 10 by extending / contracting the slide cylinder, and can be extended / stored in the vertical direction from the vehicle body 10 by extending / contracting the jack cylinder. It is.

  The swivel base 12 has a pinion gear to which the power of the turning motor is transmitted. The pinion gear meshes with a circular gear provided on the vehicle body 10 to rotate around the turning axis. The swivel base 12 includes a cab 18 disposed on the front left side, a bracket 13 disposed in the rear center, and a counterweight 19 disposed in the lower rear portion. The structure of the cab 18 will be described later.

  The boom 14 is configured to be nested by a proximal boom 141, an intermediate boom 142, and a distal boom 143, and can be expanded and contracted by a telescopic cylinder disposed inside.

  The outermost base end boom 141 is rotatably attached to a support shaft having a base portion installed horizontally on the bracket 13. Furthermore, the raising / lowering cylinder 15 is spanned between the bracket 13 and the lower surface of the base end boom 141, and the boom 14 can be raised / lowered by extending / contracting the raising / lowering cylinder 15. A sheave is disposed on the most advanced boom head 144 of the tip boom 143, and a wire rope 16 is hung around the sheave and a hook block 17 is suspended.

(Structure of cab and door)
Next, the structure of the cab 18 and the door (slide door) 40 is demonstrated using FIG. The cab (cabin) 18 is arranged on the front left side of the swivel base 12, and is formed in a box shape in which a seat, a group of operation levers, and the like are arranged. The side panel 18a outside the vehicle in the cab 18 is formed in a substantially flat plate shape, and is provided with a rounded rectangular entrance 30 for an operator to get on and off in the vicinity of the center. A sliding door 40 as a door is attached so as to be slidable in the vehicle front-rear direction so as to close the entrance 30.

  The sliding door 40 is formed in a quadrangular shape, and a window 42 is provided on the upper part so that an operator can see the outside of the vehicle. The slide door 40 is opened and closed along the side panel 18a so as to be flush with the side panel 18a in the closed state and overlap the outside of the side panel 18a in the opened state.

  In order to slide (slide) in the longitudinal direction of the vehicle in this way, as shown in FIG. 2, the slide door 40 has a vertical axis at an upper portion and a lower portion on the front end side and an intermediate portion in the vertical direction on the rear end side. Guide rollers 41a, 41b, 41c that rotate around the core, and guide rollers 41d that rotate around the horizontal axis for supporting the load at the lower part on the front end side and the middle part on the rear end side of the slide door 40, 41e. Each guide roller 41a to 41e is attached to the slide door 40 via an arm (not shown).

  On the other hand, as shown in FIG. 2, the entrance / exit 30 provided in the side panel 18a has guide rollers 41a and 41b at the upper and lower edges and the middle part in the vertical direction of the side wall behind the entrance / exit 30, respectively. , 41c, 41d, and 41e, guide rails 31a, 31b, 31c, 31d, and 31e are provided.

  Then, the guide rollers 41a, 41b, 41c slide along the guide rails 31a, 31b, 31c, respectively, so that the sliding direction is defined. The guide rollers 41d, 41e slide along the guide rails 31d, 31e, respectively. By moving, the load of the slide door 40 is supported, and the slide door 40 opens and closes smoothly along the side panel 18a.

  Here, as described above, in the state in which the slide door 40 is closed, the slide door 40 is restrained from being deformed in the out-of-plane direction by the guide rollers 41, 41b, and 41c. Moreover, since the window 42 is provided in the upper part, the rigidity of the upper part of the slide door 40 is small. Therefore, the rear upper corner (the upper right corner in FIG. 2) of the slide door 40 is easily deformed.

(Door seal structure)
Next, the seal structure of the slide door 40 will be described with reference to FIGS. A weather strip 43 is attached to the inner surface side of the periphery of the slide door 40 as shown in FIG. The weather strip 43 is provided to prevent rain, dust, and the like from entering through the gap between the entrance 30 and the slide door 40. The weather strip 43 is mainly composed of a material such as rubber (synthetic rubber) or sponge (foamed resin), and has both elasticity and weather resistance.

  On the other hand, as shown in FIG. 3B, a seat surface 33 is attached to the periphery of the entrance / exit 30 corresponding to a weather strip 43 described later. The seat surface 33 is also mainly composed of a material such as rubber (synthetic rubber) or sponge (foamed resin), and has both elasticity and weather resistance. More specifically, as shown in FIGS. 5 and 6, a seat surface 33 having a notch in the vicinity of the center in the thickness direction is fitted into the flange 32 protruding inward of the entrance 30.

  Further, the seat surface 33 of the weather strip 43 is formed to be inclined toward the indoor side of the cab 18 so as to cancel out the expected protruding shape of the slide door 40 that has received the reaction force from the weather strip 43. . And the cab 18, the sliding door 40, the weather strip 43, and the seat surface 33 are provided, and the seat surface 33 inclines, and the door seal structure S of a present Example is comprised.

  More specifically, in the door seal structure S of the present embodiment, as shown in FIG. 4, the upper edge of the entrance / exit 30 of the cab 18 is inclined toward the indoor side from the front end toward the rear end. In addition to being formed, the upper edge of the seating surface is also inclined toward the indoor side from the front end toward the rear end.

  In other words, the flange 32 at the upper edge of the entrance / exit 30 is inclined in a direction away from the slide door 40 from the vicinity of the center toward the rear end. That is, as shown in FIG. 5 and FIG. 6, the slide door 40 and the entrance / exit 30 (at the rear end position) than the distance w <b> 1 between the slide door 40 and the entrance / exit 30 (flange 32) at the front side from the center. The distance w2 from the flange 32) is larger. As a result, the reaction force received by the weather strip 43 from the seating surface 33 is reduced at the rear upper corner (upper right corner) of the slide door 40, so that the amount of deformation (the amount of protrusion in the out-of-plane direction) is small although the rigidity is small. It is suppressed. The inclined shape of the flange 32 may be linear or curved. For example, a two-letter curve can be adopted as the curved slope.

  Similarly, the flange 32 at the rear edge of the entrance / exit 30 is inclined in a direction away from the slide door 40 from the vicinity of the center toward the upper end. That is, as shown in FIG. 5 and FIG. 6, the slide door 40 and the entrance 30 (flange) at the upper end position than the distance w1 between the slide door 40 and the entrance 30 (flange 32) at a position lower than the center. The distance w2 from 32) is larger. As a result, the reaction force received by the weather strip 43 from the seating surface 33 is reduced at the rear upper corner (upper right corner) of the slide door 40, so that the amount of deformation (the amount of protrusion in the out-of-plane direction) is small although the rigidity is small. It is suppressed. The inclined shape of the flange 32 may be linear or curved. For example, a two-letter curve can be adopted as the curved slope.

(effect)
Next, the effect of the door seal structure S of the present invention will be described.

(1) As described above, the seal structure S of the mobile crane door includes the cab 18 having the entrance 30 for entrance / exit on the side surface, the slide door 40 that closes the entrance 30, and the slide door 40. A weather strip 43 installed on the periphery, and a seat surface 33 of the weather strip 43 installed on the periphery of the entrance 30. The seat surface 33 of the weather strip 43 receives the reaction force from the weather strip 43. In order to cancel the expected protruding shape of the sliding door 40, the sliding door 40 is formed to be inclined so as to recede to the inside of the cab 18. According to such a configuration, the slide door 40 is unlikely to jump out of the surface of the side panel 18 a of the cab 18.

  In particular, it is desirable to make the cabin space of the cab 18 as large as possible so that the operator (operator) can easily perform the operation. Then, it is preferable that the side panel 18a is formed in a planar shape. On the other hand, for example, in the automobile field, the shape on the slide door side is often changed in anticipation of the reaction force from the weather strip. This is because even if the vehicle is designed in consideration of the expected shape, the body is formed by a curved surface, so that the visual discomfort is small. However, in the mobile crane, as described above, since the side panel 18a is planar, when it is designed in consideration of the prospective shape, even if it is a small amount, an uncomfortable appearance will occur. Therefore, as described in the present embodiment, the weather strip 43 on the slide door 40 side is maintained in a straight line, and the seat surface 33 on the entrance / exit 30 side is inclined inward to suppress popping out. is there.

(2) Specifically, the door seal structure S includes a window 42 formed in the upper part of the slide door 40 and a guide rail 31 a extending along the upper edge of the entrance 30 of the cab 18. A guide roller 41a attached to the front end of the upper edge of the slide door 40 and slidably hooked on the guide rail 31a, and extending rearward from the vicinity of the center of the rear edge of the entrance / exit 30 of the cab 18 A guide rail 41c, and a guide roller 41c that is attached to the vicinity of the center of the rear edge of the slide door 40 and is slidably hooked on the guide rail 31c. The seat surface 33 is formed so as to be inclined indoors toward the rear end, and the rear edge of the entrance / exit 30 of the cab 18 is inclined toward the upper end from the vicinity of the center to the indoor side. Formed To have. With such a structure, the reaction force that the weather strip 43 receives from the seat surface 33 is reduced at the rear upper corner (upper right corner) of the slide door 40, so that the rigidity is small, but the deformation amount (out-of-plane jumping out) Amount) is suppressed.

  The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to the present invention. included.

  For example, although not specifically described in the embodiment, it is also preferable to install an additional seal structure separately from the weather strip 43 and the seat surface 33. In particular, it is preferable to install an additional seal structure outside the weather strip 43 and the seat surface 33 in the region where the seat surface 33 is inclined.

S: door seal structure;
1: Rough terrain crane (mobile crane);
18: cab; 18a: side panel;
30: Doorway;
31a-31e: Guide rail; 32: Flange; 33: Seat surface;
40: Sliding door (door)
41a-41e: guide roller; 42: window; 42: weather strip

Claims (2)

A mobile crane door seal structure,
A driver's cab with entrances and exits on the side,
A door that closes the entrance;
A weatherstrip installed on the periphery of the door;
A seating surface of the weatherstrip installed on the periphery of the entrance,
The seal structure of the door of the mobile crane, wherein the seating surface of the weather strip is formed to be inclined toward the indoor side of the cab. A window formed in the upper part of the door, a guide rail extending along the upper edge of the entrance of the driver's cab, and attached to a front end of the upper edge of the door and slidable on the guide rail A guide roller that is hooked on a guide rail, a guide rail that extends rearward from the vicinity of the center of the rear edge of the entrance of the cab, and a slide that is attached to the vicinity of the center of the rear edge of the door and slides on the guide rail A guide roller that is freely hooked,
The upper edge of the entrance / exit of the cab is formed with the seat surface inclined inward from the front end toward the rear end, and the rear edge of the entrance / exit of the cab from the vicinity of the center to the upper end. The mobile crane door sealing structure according to claim 1, wherein the seating surface is inclined inward.