JPH0626450Y2 - Step device for getting on and off the crawler type traveling body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a step device for getting on and off a crawler type traveling body such as a crawler crane and a pile driver.

[Conventional technology]

In the crawler type traveling body of the construction machine or the like, the left and right crawler intervals are set to be as wide as possible in order to ensure work safety. On the other hand, the crawler is provided with a width that is the full transportation limit in consideration of the case where the crawler type traveling body is mounted on a trailer or the like and is transported, and as shown in FIG. 41 is also fixed to the side surface of the crawler frame 43 so as to fit inside the outer end of the crawler belt 42.

Further, as disclosed in Japanese Utility Model Laid-Open No. 63-48679, it is provided on the side surface of the crawler frame so as to be movable back and forth.
The step for loading / unloading, which is stored inside the outer end of the crawler, is also set inside the outer end of the crawler belt when the crawler frame is advanced from the side surface and used for loading / unloading.

[Problems to be solved by the device]

However, in the fixed and forward / backward steps described above, since the knee or the like hits the outer edge of the crawler when getting on and off,
It was difficult to get on and off.

In addition, since this type of boarding / alighting step device is used in a place where mud or the like is likely to adhere, in the latter boarding / alighting step device, the holes on the side surface of the crawler frame where the steps are taken in and out easily get clogged with mud, etc. Cannot be done smoothly,
Further, the holes are severely worn, and a sealing mechanism for preventing the entry of mud or the like is required.

Therefore, an object of the present invention is to provide a step device for getting on and off a crawler type traveling body that can be safely and smoothly put on and off within a transportation limit with a simple structure.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the first is a step device for getting on and off a crawler type traveling body provided with a step on the side surface of a crawler frame supporting a crawler so as to be able to store steps inside the outer end of the crawler. A step formed to have a length capable of projecting, a vertical pivot pin for pivotally supporting the step horizontally on the side surface of the crawler frame, and the step with the tip projecting from the outer edge of the crawler. Is provided with a vertical fixing pin for locking the crawler frame to the side surface of the crawler frame. The second feature is that the step can be stored inside the crawler frame side surface supporting the crawler and inside the crawler outer end. In the provided step device for getting on and off the crawler type traveling body, a step formed to a length capable of protruding from the outer end of the crawler, and the step A long hole formed in the side of the step in the longitudinal direction of the step, a horizontal pivot pin that is inserted into the long hole and pivotally supports the step in the vertical direction on the side surface of the crawler frame, and rotates horizontally. And a concave-convex engaging portion that locks the step whose moving end projects from the outer end of the crawler with the side surface of the crawler frame.

[Action]

With the above-described configuration, the steps can be easily stored inside the outer end of the crawler when the crawler-type traveling body is transported, and the step in the stored state can be protruded from the outer end of the crawler to be used safely when getting on and off the cab. be able to.

〔Example〕

Embodiments in which the present invention is applied to a three-point support type pile driver will be described below with reference to the drawings.

1 to 3 show a first embodiment of the present invention,
In the pile driver 1, a base machine body 3 is rotatably mounted on an upper part of a crawler-type traveling body 2. The base machine body 3 has a leader 4 standing upright at its front portion and a driver's cab 5 at a substantially central portion. Is equipped with. A crawler 9 for traveling is suspended on a plurality of track rollers 8 provided around the crawler frames 6 on the left and right of the crawler type traveling body 2.

On the side surface of the crawler frame 6 on the entry / exit side of the cab 5, the crawler 9 can be stored inside the outer end of the crawler 9 (step 7).
Is provided. This step 7 is the U-shaped frame 1
Pins 11 and 12 for inserting pins are provided on the opening side of 0, a footrest plate 13 made of expanded metal or the like is provided at the tip, and a cross member 14 for reinforcement is appropriately provided on the frame body 10.
Is provided, and is formed to have a length that can project from the outer end of the crawler 9.

The bracket 15 on the side of the crawler frame 6 includes
A pivot support pin 16 is provided in a vertical direction that pivotally supports the step 7 horizontally on the side surface of the crawler frame, and the pivot support pin 16 is inserted into the pipe 11 to perform the step operation. 7 is pivotally supported in the horizontal direction,
The step 7 is stored inside the outer end of the crawler 9 by rotating the step 7 to the position shown by the chain double-dashed line in FIG.

Further, a vertical fixing pin 17 that locks the step 7 to the side surface of the crawler frame 6 with all the ends projecting from the outer end of the crawler 9 is removably disposed on the bracket 15. When using Step 7, the Step 7 is rotated from the position indicated by the chain double-dashed line in FIG. 3 to the position indicated by the solid line in FIG. 3, and the fixing pin 17 is connected to the bracket 15 and the pipe 12. And the step 7 is locked to the side surface of the crawler frame 6 so that the tip of the step 7 projects from the outer end of the crawler 9.

A wire 18 fixed to the crawler frame 6 is connected to the head of the fixing pin 17 to prevent loss during removal.

As a result, the tip of the step 7 projects from the outer end of the crawler 9 by, for example, 7 to 8 cm, and the user can safely get on and off the cab 5 without hitting his or her knee with the outer edge of the crawler 9.

FIG. 4 shows another embodiment of the present invention. Step 2
0 is equipped with a footrest plate 27 made of expanded metal or the like at the tip of a U-shaped frame 26, and long holes 28, 28 for inserting pins are formed on both side surfaces of the frame 26 in the same length in the longitudinal direction. The V-shaped groove 2 is provided at the same position on the upper side of the opening of the frame 26.
9 and 29 are provided, and the length is formed so as to project from the outer end of the crawler.

On the side surface of the crawler frame 6, a pair of brackets 21 and 21 having a length that does not project from the outer ends of the crawlers are provided in a protruding manner.
2 is laid horizontally, and a pin insertion hole 23 into which a removable safety pin 31 is inserted is provided near the inner end.

A top plate 24 that straddles the upper portions of the brackets 21 and 21 is provided near the side surface of the crawler frame 6.
A V-shaped clip 25 is provided on the lower surface of the parallel to the side surface of the crawler frame 6. The clip 25 and the V-shaped grooves 29, 29 rotate in a horizontal state to engage step 7 with the tip protruding from the outer end of the crawler 9 on the side surface of the crawler frame 6. Forming a part.

The pivot pin 22 is inserted into the long holes 28, 28 of the step 20 to rotatably support the step 20 in the vertical direction, and the step 20 is pivoted as shown by a two-dot chain line in FIG. By suspending with the support pin 22, step 20 is stored inside the outer end of the crawler.

At this time, the step 20 suspended by the pivot pin 22
Are held in a protective frame 30 provided at the bottom of the crawler frame 6 to prevent shaking of the step 20 during transportation or the like.

When the step 20 is used, the suspended step 20 is slid upward from the position of the chain double-dashed line in FIG. 4, and then the tip of the step 20 is rotated outward while the step 20 is rotated. Is slid to the lower part of the top plate 24, the groove 29 is locked to the clip 25, and the tip of the step 20 is projected from the outer end of the crawler as shown by the solid line in FIG.

Further, in this state, the safety pin 31 is inserted into the pin insertion hole 23 and the elongated holes 28, 28 to suppress the rattling of step 20 and stabilize it.

As a result, the tip of step 20 projects from the outer end of the crawler, and the user can safely get on and off the cab without hitting his or her knees with the outer edge of the crawler.

[Advantage of the Invention] As described above, according to the present invention, a step formed to have a length projecting from the outer end of the crawler and a vertical pivot for axially supporting the step horizontally on the side surface of the crawler frame are provided. A support pin and a vertical fixing pin for locking the step on the side surface of the crawler frame with the tip protruding from the outer end of the crawler, or a step formed to a length that allows the step to protrude from the outer end of the crawler A long hole formed in the side of the step in the longitudinal direction of the step, and a horizontal pivot pin that is inserted through the long hole to pivotally support the step in the vertical direction on the side surface of the crawler frame. ,
Since the step which is rotated horizontally and the tip of which protrudes from the outer end of the crawler is engaged with the side surface of the crawler frame, when the step is used, the tip of the step is separated from the outer end of the crawler. By protruding, the user can safely and smoothly get on and off the cab without hitting the outer edge of the crawler and the like, and when the step is not used, the step can be easily stored inside the outer end of the crawler without using tools, Can fit within transport limits.

In addition, even if mud or the like adheres, the entire device is provided on the side surface of the crawler frame, so that the device can be visually observed, the maintenance is easy, and the step rotation is smooth.

[Brief description of drawings]

1 to 3 show a first embodiment of the present invention,
FIG. 1 is a perspective view of a pile driver, FIG. 2 is a sectional view of an essential part, FIG. 3 is a plan view of an essential part, FIG. 4 is a sectional view of an essential part showing a second embodiment of the present invention, and FIG. FIG. 6 is a cross-sectional view of a main part showing a conventional example. 1 ... pile driver, 2 ... crawler type traveling body, 5 ... cab, 6 ... crawler frame, 7,20 ... step,
8 ... Track roller, 9 ... Crawler, 10, 26 ...
... Frame, 11,12 ... Pipe, 13,27 ... Footboard, 15,21 ... Bracket, 16,22 ... Pivot pin, 17 ... Fixing pin, 23 ... Pin insertion hole , 24
...... Top plate, 25 ...... clip, 28 ...... slot, 29 ......
Groove, 31 ... Safety pin

Claims (2)

[Scope of utility model registration request] 1. A step device for getting on and off a crawler-type traveling body, wherein a step is provided on a side surface of a crawler frame supporting a crawler so as to be able to be stored inside an outer end of the crawler. Steps,
A vertical pivot pin that pivotally supports the step on the side surface of the crawler frame so that the step can rotate horizontally, and a vertical direction pin that locks the step on the side surface of the crawler frame with its tip protruding from the outer end of the crawler frame. A stepping device for getting on and off a crawler type traveling body, comprising: a fixing pin. 2. In a step device for getting on and off a crawler-type traveling body, wherein a step is provided on a side surface of a crawler frame supporting a crawler so as to be able to be stored inside an outer end of the crawler, and the step device is formed to have a length capable of protruding from the outer end of the crawler. Steps,
A long hole formed on the side of the step in the longitudinal direction of the step; a horizontal pivot pin that is inserted through the long hole to pivotally support the step in the vertical direction on the side surface of the crawler frame; A step device for getting on and off a crawler-type traveling body, comprising: a concave-convex engaging portion that locks the step whose front end protrudes from the outer end of the crawler when locked to the side surface of the crawler frame.