JP2016069946A - Construction machinery comprising step - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the loss of components such as a bolt and a pin, and safely and easily fix a step in a folding position by one worker.SOLUTION: A connection lever (2) for connecting a lever support plate (7) provided on an outside surface (21) and a step support member (1a) for supporting a step (1) is provided. A first hole (2a) and a second hole (2b) or a third hole (2c) is formed in the connection lever (2).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a construction machine including a step in which a step is rotatably attached to an outer surface of the construction machine.

  In construction machines such as large excavators, large cranes, and floating excavators, the upper cab is turned on the cab side and the other side for daily inspection and repair work due to reasons such as the high cab position and poor scaffolding. A catwalk (or step, hereinafter referred to as a step for simplicity) is attached to the outer surface of the body.

  In addition, when the step is attached to the outer surface of the upper swing body, the vehicle body exceeds the transport limit width, so the step is folded during transport to secure the transport limit width of the vehicle body.

  In the prior art relating to such a step mounting structure, generally, as a step fixing method, a method of fixing the step and the fixing plate with a bolt as in the example shown in FIG. ing.

  Further, as another example of the prior art relating to the step mounting structure, for example, as shown in FIG. 3B, an oblong long hole is provided on the step side, and the step is moved downward at the folding position. There is also a method of sinking and fixing.

  Moreover, there is an attachment device for a rotating body (hereinafter, described by exemplifying a step) disclosed in Patent Document 1 as still another example of the related art relating to a step attachment structure. In this rotating body mounting device, the lower end of the step is fixed to the mounting frame by the stopper function by the stopper member at the folding position, and the middle part of the step is fixed to the mounting frame by the main fixing function by the removable fixing pin. Yes.

JP 2014-70413 A (published April 21, 2014)

  However, the conventional techniques as described above have the following problems.

  For example, in the above-described method of fixing the step and the fixing plate with a bolt, an operator holding the step at the insertion hole position of the bolt is required in addition to the operator for fixing the bolt. Also, when aligning the holes for inserting the bolts, the operator's head is positioned below the step, which is dangerous. Furthermore, if the bolt is lost, it becomes difficult to fix the step in the folded position.

  Next, in the above-described method in which an oblong-shaped long hole is provided on the step side and the step is sunk downward and fixed at the folding position, it is necessary to lift the total weight of the step to bring the step into a working posture. Depending on the weight, multiple workers are required.

  Furthermore, in the rotating body mounting device disclosed in Patent Document 1, if the fixing pin for fixing the intermediate portion of the step to the mounting frame is lost, it becomes difficult to fix the step at the folding position.

  The present invention has been made in view of the above problems, and its purpose is to prevent parts such as bolts and pins from being lost and to fix a step safely and easily in a folding position by one operator. It is to provide a construction machine with steps that can be done.

In order to solve the above-described problem, a construction machine including a step according to aspect 1 of the present invention includes a step in which a step is rotatably attached to an outer surface from an extended position to a folded position. And a connection lever that connects between a lever support plate provided on the outer surface and a step support member that supports the step, and the connection lever includes:
A guide hole that guides a guide pin provided in the step support member in accordance with the rotation of the step, and is formed continuously with respect to the guide hole, and the step is folded when the guide pin is inserted. A fixing hole for fixing at a position is formed at least.

  According to the said structure, the guide hole formed in the connection lever guides the guide pin provided in the step support member according to rotation of a step. For this reason, it is possible for one worker to safely and easily rotate the step from the extended position to the folded position. Moreover, according to the said structure, the rotation from the folding position by the dead weight of a step to the overhang | projection position is prevented by inserting a guide pin in the fixing hole continuously formed with respect to the guide hole. For this reason, it is possible to fix the step at the folding position safely and easily by one worker. Moreover, according to the said structure, since it is not necessary to mount components, such as another volt | bolt and a pin for fixing a step in a folding position, components, such as a volt | bolt and a pin, are not lost. As described above, according to the construction machine including the step according to the aspect of the present invention, it is possible to prevent parts such as bolts and pins from being lost and to fix the step safely and easily in a folding position by one operator. Can do.

  Moreover, the construction machine provided with the step which concerns on aspect 2 of this invention is the direction in which the distance from the said outer surface becomes large with respect to the position where the said fixing hole extends in the said aspect 1. It is preferable to be bent. According to the above configuration, the guide pin naturally fits into the fixing hole by the force that the connecting lever tries to rotate vertically downward by its own weight only by rotating the step in the direction toward the folding position. Become. Thereby, fixation in the folding position of a step can be performed easily.

  Moreover, the construction machine provided with the step which concerns on aspect 3 of this invention WHEREIN: In the said aspect 1 or 2, the said step support member is provided in the center vicinity of the longitudinal direction of the said step arrange | positioned along the said outer surface. Preferably it is. According to the above configuration, the step support member connected to the lever support plate via the connection lever is easier to rotate the step than the configuration provided near the end in the longitudinal direction of the step. A single operator can safely and easily rotate the step to the folding position or fix the step at the folding position.

  According to one aspect of the present invention, it is possible to prevent the parts such as bolts and pins from being lost and to fix the step safely and easily at the folding position by one operator.

(A) is sectional drawing (projection attitude | position) which shows the structure of the side step which concerns on Embodiment 1 of this invention, (b) is a top view which shows the structure of the said side step, (c), It is sectional drawing which shows the structure of the connection lever which comprises the said side step, (d) is sectional drawing (intermediate attitude | position) which shows the structure of the said side step, (e) shows the structure of the said side step. It is sectional drawing (folding attitude | position), (f) is sectional drawing which shows the structure of the connection lever of the modification which concerns on Embodiment 2 of this invention. (A) is a side view which shows the external structure of a construction machine, (b) is a top view which shows the external structure of the said construction machine, (c) is attachment of the step support member with respect to an attachment frame It is a top view which shows a structure, (d) is a top view which shows the structure of the said side step, (e) is sectional drawing of the AA cross section shown to (a), (f) is It is sectional drawing of the BB cross section shown to (a). (A) is a figure which shows the method of fixing the conventional step and a fixing plate with a volt | bolt, (b) is providing the oblong shape long hole in the conventional step side, and makes a step below in a folding position. It is a figure which shows the method of sinking and fixing.

  The embodiment of the present invention will be described with reference to FIGS. 1 and 2 as follows. Hereinafter, for convenience of explanation, components having the same functions as those described in the specific embodiment may be denoted by the same reference numerals and description thereof may be omitted.

Embodiment 1
FIG. 1A is a cross-sectional view showing the structure of the side step 10 according to Embodiment 1 of the present invention. The figure shows the state of the side step 10 when step 1 is in the overhanging position, that is, in the overhanging posture. Next, FIG. 1B is a top view showing the structure of the side step 10. FIG. 1C is a cross-sectional view showing the structure of the connecting lever 2 constituting the side step 10.

  As shown in FIGS. 1 (a) and 1 (b), the side step 10 of the present embodiment includes step 1, a connecting lever 2, a holding portion 3, a guide pin 4, a lever rotating support pin 5, A moving support shaft 6 and a lever support plate 7 are provided.

  Step 1 includes a tread board, and this tread board is supported by a step support member 1a. Further, the rotation support shaft 6 is fitted into the hole formed in the step support member 1a and the hole formed in the rotation support plate 3b of the holding portion 3, and step 1 is performed via the step support member 1a. Thus, the rotary support plate 3b is supported so as to be rotatable from the extended position to the folded position. The holding unit 3 includes the rotation support plate 3b and the attachment frame 3a. The rotation support plate 3b is fixed to the mounting frame 3a of the holding unit 3, and the mounting frame 3a is fixed to the outer side surface 21 of the upper swing body of the construction machine 20 described later.

  The connection lever 2 is a lever that connects between the lever support plate 7 provided above the outer side surface 21 of the upper swing body and the step support member 1 a that supports the step 1. A lever rotation support pin 5 is fitted into a hole formed at the upper end of the connection lever 2 and a hole formed in the lever support plate 7, and the connection lever 2 is connected to the lever via the lever rotation support pin 5. The support plate 7 is rotatably supported.

  Next, as shown in FIG. 1C, an L-shaped guide hole 2h is formed in the connecting lever 2, and a guide pin 4 provided in the step support member 1a is formed in the guide hole 2h. It is inserted. Further, the connecting lever 2 is formed with a first hole 2a (guide hole) for guiding the guide pin 4 provided in the step support member 1a in accordance with the rotation of step 1. Further, as shown in the figure, the connecting lever 2 is formed continuously with respect to the first hole 2a, and the guide pin 4 is inserted as shown in FIG. A second hole 2b (fixing hole) that is fixed at a position is formed.

  FIG. 1D shows the side surface of the side step 10 when it is in an intermediate posture between the overhang position and the folded position. At this time, the guide pin 4 is located in the vicinity of the L-folded position of the guide hole 2h. Next, (e) of FIG. 1 shows the side surface of the side step 10 when the step 1 is in the folded position, that is, in the folded posture. At this time, the guide pin 4 is fitted in the second hole 2b of the guide hole 2h.

  According to the said structure, the 1st hole 2a formed in the connection lever 2 guides the guide pin 4 provided in the step support member 1a according to rotation of Step 1. FIG. For this reason, it is possible for one worker to safely and easily turn Step 1 from the extended position to the folded position. In addition, according to the above configuration, the guide pin 4 is inserted into the second hole 2b formed continuously with respect to the first hole 2a, so that the rotation from the folding position due to its own weight in Step 1 toward the overhanging position. Is blocked. For this reason, it is possible to fix Step 1 at the folding position safely and easily by one worker. Further, since the second hole 2b is formed to be bent in the direction in which the distance from the outer surface 21 of the upper swing body becomes larger with respect to the position where the first hole 2a extends, FIG. From this state, the guide pin 4 naturally fits into the second hole 2b due to the force that the connecting lever 2 tries to rotate vertically downward by its own weight only by rotating Step 1 in the direction toward the folding position. It becomes a state to do. Thereby, fixation in the folding position of Step 1 can be performed easily. Moreover, according to the said structure, since it is not necessary to mount | wear with components, such as another volt | bolt and a pin for fixing step 1 in a folding position, components, such as a volt | bolt and a pin, are not lost. As described above, according to the side step 10, it is possible to prevent parts such as bolts and pins from being lost and to fix the step safely and easily at the folding position by one operator.

[Embodiment 2]
Next, (f) of FIG. 1 is a figure which shows the structure of the connection lever 2 of the modification based on Embodiment 2 of this invention. The connection lever 2 shown in FIG. 1C is different from the connection lever 2 shown in FIG. 1F in that the structure of the guide hole 2h and the guide hole 2h ′ is different.

  The guide hole 2h 'according to the present embodiment includes a first hole 2a (guide hole), a second hole 2b, and a third hole 2c (fixed hole). The second hole 2b is a hole continuously formed with respect to the first hole 2a, and the third hole 2c is a hole continuously formed with respect to the second hole 2b. Yes. The first hole 2a and the second hole 2b are bent in an L shape, and the second hole 2b and the third hole 2c are also bent in an L shape.

  When the guide pin 4 is inserted into the third hole 2c, the guide pin 4 is unlikely to be detached from the third hole 2c even if vertical vibration is applied to the side step 10, so that the guide pin 4 at the folding position of Step 1 Fixing strength can be increased.

[About the mounting position of the side step construction machine]
Next, based on FIG. 2, the attachment position in the construction machine of the side step 10 mentioned above is demonstrated. FIG. 2A is a side view showing an external structure of the construction machine 20. FIG. 2B is a top view showing the external structure of the construction machine 20. The construction machine 20 includes either the side step 10 according to the first embodiment described above or the side step including the connecting lever 2 according to the second embodiment. As shown in FIG. 2A, the above-described side step 10 is attached to the outer surface 21 of the upper swing body of the construction machine 20. As a result, it is possible to realize the construction machine 20 that can prevent parts such as bolts and pins from being lost and can be fixed safely and easily in the folding position by one operator.

  Next, as shown in FIG. 2 (b), holding portions 8 are arranged at both ends in the longitudinal direction of step 1, respectively, and the holding portion 3 and the above-described holding portion 8 are located near the center in the longitudinal direction of step 1. A connecting lever 2 is arranged. That is, a step support member 1 a connected to the lever support plate 7 via the connection lever 2 is provided near the center in the longitudinal direction of step 1 arranged along the outer surface 21 of the upper swing body. preferable. According to the above configuration, the step support member 1a coupled to the lever support plate 7 via the coupling lever 2 is rotated step 1 as compared with the configuration provided near the end in the longitudinal direction of step 1. Since it becomes easy to move, it is possible for one operator to safely and easily rotate the step to the folding position or to fix the step at the folding position.

  Next, (c) of FIG. 2 is a top view which shows the attachment structure of the step support member 1a with respect to the attachment frame 8a. As shown in the figure, the holding portion 8 includes an attachment frame 8a, a rotation support plate 8b, and a stopper 8c. FIG. 2D is a top view showing the structure of the side step 10 described above. 2 (e) is a cross-sectional view taken along the line AA shown in FIG. 2 (a), and FIG. 2 (f) is a cross-sectional view taken along the line BB shown in FIG. 2 (a). FIG.

  In the configuration shown in FIG. 2C and FIG. 2E, the connecting lever 2 and the lever support plate 7 are not provided. As shown in these drawings, step 1 includes a tread board, and this tread board is supported by a step support member 1a. Further, the rotation support shaft 6 is fitted into the hole formed in the step support member 1a and the hole formed in the rotation support plate 8b of the holding portion 8, and step 1 is performed via the step support member 1a. The pivot support plate 8b is pivotally supported from the extended position to the folded position. The rotation support plate 8b is fixed to the attachment frame 8a of the holding portion 8, and the attachment frame 8a is fixed to the outer side surface 21 of the upper swing body of the construction machine 20 described later. Further, as shown in FIG. 2E, the rotation support plate 8b is provided with a stopper 8c, and step 1 is fixed at the overhanging position by the stopper 8c.

[Additional Notes]
The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

  INDUSTRIAL APPLICABILITY The present invention can be used for a construction machine or the like having a step in which a step is rotatably attached to an outer surface.

1 step 1a step support member 2 connecting lever 2a first hole (guide hole)
2b Second hole (fixed hole)
2c 3rd hole (fixed hole)
4 Guide pin 7 Lever support plate 20 Construction machine 21 Outer surface of upper revolving unit

Claims (3)

A construction machine having a step attached to an outer surface so as to be rotatable from an extended position to a folded position,
A connecting lever that connects between a lever support plate provided on the outer surface and a step support member that supports the step;
The connecting lever
A guide hole for guiding a guide pin provided in the step support member in accordance with the rotation of the step;
A construction machine comprising a step, wherein the step is formed continuously with respect to the guide hole, and at least a fixing hole for fixing the step at the folding position by fitting the guide pin is formed. .   2. The construction with steps according to claim 1, wherein the fixing hole is bent in a direction in which the distance from the outer surface increases with respect to a position where the guide hole extends. machine.   A construction machine comprising steps, wherein the step support member is provided near the center in the longitudinal direction of the steps arranged along the outer surface.

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