JP3243916U - gangway - Google Patents

Abstract

An object of the present invention is to provide a ramp that allows a worker to easily get on and off a heavy machine having a crawler. [Solution] A ramp 10 is removably installed on a step provided on a crawler frame of heavy equipment having a crawler, and includes a footrest part 12 having a footrest surface on which to place feet, and a footrest part 12 that holds the footrest part. The footrest has a holding part 11 that connects the holding part to the step in a detachable manner, and a connecting part 15 that connects the holding part to the step in a removable manner. It is attached to the holding part so as to be located higher up. When the gangway 10 is connected to the step, the footrest surface is positioned above the step, making it easier for workers to get on and off the heavy machinery with crawlers than when only the step is used. It becomes easier. [Selection diagram] Figure 1

Description

Application for Article 30, Paragraph 2 of the Patent Act as applied mutatis mutandis under Article 11 of the Utility Model Act March 2023, Construction Machinery Civil Engineering Co., Ltd. (Sales) [Publications] March 2023, Nishio Rentall Co., Ltd. (Flyer)

The present invention relates to a gangway. More specifically, the present invention relates to a ramp used for workers to get on and off the driver's seat in heavy machinery with crawlers.

In large heavy machinery such as cranes, the driver's seat is located high, making it difficult for workers to get on and off the driver's seat directly from the ground. There are steps. For example, in heavy equipment that runs on tires, ladder-like steps may be placed in the space between the tires (see Patent Documents 1 and 2), or ladder-like steps may be stored in the space between the tires and the workbench. This allows steps to be expanded when necessary (see Patent Document 3).

On the other hand, in a heavy machine that has crawlers as a running body, a pair of crawlers are arranged on the side of the driver's seat, so it is not possible to install a ladder-like step like a heavy machine that runs on tires. For this reason, a simple step is provided on the side of the crawler frame. When the worker gets on and off the driver's seat, the worker first steps onto the upper surface of the shoe of the crawler from the step and then gets on and off the driver's seat.

Japanese Patent Application Publication No. 2016-155672 JP 2020-1475 Publication JP2016-74323A

However, the step provided on the side surface of the crawler frame is usually just a U-shaped metal plate provided on the side surface of the frame. Furthermore, since the vehicle width is restricted by the Road Traffic Act, etc., the steps are provided so that the outer ends of the steps do not protrude further than the outer ends of the shoes. Therefore, when the worker gets off the driver's seat, the shoes of the crawler get in the way and make it difficult to see the steps, making it difficult for the worker to get off the driver's seat quickly, and potentially causing the worker to miss the step and fall. There is sex. Furthermore, when a worker gets into the driver's seat, it is difficult for the worker to quickly climb up using only the steps provided on the side of the crawler frame, and the worker may hit his/her foot on the shoe. Currently, there is no step that makes it easier for workers to get in and out of the driver's seat in heavy machinery that runs on crawlers, and there is a need for such equipment.

In view of the above circumstances, it is an object of the present invention to provide a ramp that allows workers to easily get on and off heavy machinery having crawlers.

The first gangway is a ramp that is detachably attached to a step provided on a crawler frame of a heavy machine having a crawler, and includes a footrest portion having a footrest surface on which feet are placed, and the footrest portion. and a connecting part that removably connects the holding part to the step, and the footrest is located at the top when the holding part is connected to the step by the connecting part. The foot rest surface is attached to the holding part so as to be located above the step.
The ramp of the second invention differs from the first invention in that the step has a body part provided with a gap between it and the crawler frame, and the connecting part has an opening at the lower end of the step. It is characterized by having an engagement groove that engages with the main body.
In the ramp of a third invention, in the second invention, the connecting part includes a fixed member fixed to the holding part, a movable member provided so as to be able to approach and separate from the fixed member, and a main body part of the step. The step is characterized by comprising a connecting member that holds the main body of the step between the movable member and the fixed member in a state of being engaged with the engagement groove.
In the ramp of a fourth invention, in the second invention, the holding part has a pair of plate-like members provided so as to sandwich the footrest part, and the lower end part of the pair of plate-like members is attached to the A connecting portion is provided, and engagement grooves for the connecting portion are provided at lower end portions of the pair of plate-like members, respectively.
The ramp of the fifth invention has a plurality of footrests in the first invention, and the plurality of footrests are arranged along the vertical direction in a state where the holding part is connected to the step by the connection part. They are characterized by being arranged so that they are lined up.
In the ramp of a sixth invention, in the fifth invention, the holding part has a pair of plate-like members provided so that the surfaces thereof face each other, and the plurality of legs are arranged between the pair of plate-like members. It is characterized by being provided with a holder.

According to the first invention, when a ramp is connected to a step, the footrest surface located at the top is located above the step, so compared to the case where only the step is used, it is easier to use heavy equipment with crawlers. It becomes easier for workers to get on and off.
According to the second invention, the ramp can be connected to the main body of the step simply by engaging the engagement groove of the connecting portion with the main body of the step, so that the gangway can be easily connected to the step.
According to the third invention, since the connecting member can hold the main body of the step between the fixed member and the movable member, the ramp can be stably connected to the main body of the step.
According to the fourth invention, the structure of the ramp can be simplified and the weight of the ramp can be reduced.
According to the fifth invention, it becomes easy for a worker to get on and off a heavy machine having a crawler.
According to the sixth invention, the structure of the ramp can be simplified and the weight of the ramp can be reduced.

It is a schematic explanatory view of ramp 10 of this embodiment, (A) is a perspective view seen from the front, and (B) is a perspective view seen from the back. (A) is a schematic plan view of the ramp 10 of the present embodiment, (B) is a sectional view taken along line BB in (A), and (C) is a sectional view taken along line CC in (A). be. The pair of engagement grooves 15h, 15h of the gangway 10 are engaged with the main body 4a of the step 4, and (A) shows the main body 4a of the step 4 not sandwiched between the moving member 15b and the fixed member 15a. FIG. 3B is a schematic explanatory diagram of the state, and (B) is a schematic explanatory diagram of the state in which the main body portion 4a of step 4 is sandwiched between the moving member 15b and the fixed member 15a. It is a schematic explanatory view of ramp 10 of other embodiments, (A) is a perspective view seen from the front, and (B) is a perspective view seen from the back. FIG. 1 is a schematic explanatory diagram of a state in which a ramp 10 of the present embodiment is attached to a heavy machine 1. FIG. FIG. 2 is a schematic explanatory diagram of a situation where a worker is getting on and off the driver's seat using the gangway 10 of the present embodiment attached to the heavy equipment 1. FIG.

The gangway of this embodiment is used when a worker gets on and off the driver's seat of a heavy machine that has a crawler, and by attaching it to the steps of the crawler, it can make it safe and easy for the worker to get on and off. be.

<Heavy equipment 1>
First, before explaining the details of the ramp 10 of this embodiment, the heavy equipment 1 in which the ramp 10 of this embodiment is used will be explained.

As shown in FIGS. 5 and 6, a heavy machine 1 using a gangway according to the present embodiment includes a main body 2 and a driving crawler 3 provided on the crane main body 2. The main body 2 has a driver's seat 2a provided above the crawler 3 for a worker to operate the heavy equipment 1. The crawler 3 includes a crawler frame 3b and shoes 3s arranged around the crawler frame 3b. Further, the crawler frame 3b of the crawler 3 has a step 4 for a worker to get on and off the driver's seat 2a of the heavy equipment 1. This step 4 is formed by bending a plate into a U-shape, and has a main body 4a and a pair of connecting parts 4b, 4b that connect the main body 4a to the crawler frame 3b. (See Figure 5). This step 4 is provided on the crawler frame 3b so that the surface of the main body portion 4a is parallel to the side surface of the crawler frame 3b. In other words, the step 4 is provided so that when the heavy machine 1 is placed on a horizontal ground, the surface of the main body 4a becomes parallel to the vertical direction.

Note that the expression "the surface of the main body 4a is parallel to the vertical direction" does not necessarily mean that the surface of the main body 4a is completely parallel to the vertical direction; This also includes cases where it is slightly inclined with respect to the direction.

<Ramp 10 of this embodiment>
As shown in FIGS. 1 and 2, the gangway 10 of this embodiment includes a holding part 11 having a pair of plate-like members 11a, 11a, a foot rest part 12 attached to this holding part 11, and a holding part 11. and a connecting portion 15 that connects the main body portion 4a of the step 4 in a detachable manner.

As shown in FIGS. 1 and 2, the pair of plate-like members 11a, 11a of the holding part 11 are provided so as to face each other and to be spaced apart from each other by a predetermined distance. The pair of plate-like members 11a, 11a are designed so that the width of the upper part is narrower than that of the lower part so as not to interfere with the shoes 3s of the crawler 3 when the ramp 10 of this embodiment is attached to the main body part 4a of the step 4. is formed. In FIGS. 1 and 2, the pair of plate-like members 11a, 11a has one side edge (see FIG. 2(B)) when viewed from the side (the left side edge in FIGS. 2(B) and (C)). The edge) is shaped like a step so that the width at the top is narrower than at the bottom.

As shown in FIGS. 1 and 2, three stages of footrests 12 are provided between the pair of plate-like members 11a, 11a. The three-stage footrest 12 is located at a position biased toward the other side edge (the right side edge in FIGS. 2(B) and 2(C)) of the pair of plate-like members 11a, 11a. The plate members 11a, 11a are arranged so as to be spaced apart along the height direction of the plate members 11a, 11a. In other words, the three-stage foot rest section 12 is arranged in the vertical direction when the holding section 11 is connected to the main body section 4a of the step 4 by the connecting section 15 (that is, when the ramp 10 of this embodiment is connected to the step 4). They are arranged in rows along the Each footrest 12 is formed by a pair of plate-like members 12a, 12a, respectively. Specifically, the pair of plate-like members 12a, 12a of each foot rest part 12 are opposed to each other, and their surfaces are in the height direction of the pair of plate-like members 11a, 11a (FIGS. 1 and 2(B), ( In C), it is provided so as to be parallel to the vertical direction). Further, the pair of plate-like members 12a, 12a of each foot rest part 12 are arranged at a predetermined interval (for example, 100 mm) in the width direction (left-right direction in FIGS. 2(B) and (C)) of the pair of plate-like members 11a, 11a. It is provided so that its surface is orthogonal to the surfaces (mutually opposing surfaces) of the pair of plate-like members 11a, 11a, with a gap of about Moreover, the pair of plate-like members 12a, 12a of each footrest 12 are provided so that their upper edges are approximately at the same height, and these upper edges form a footrest surface. Note that the footrest surface, that is, the upper edge of the pair of plate-like members 12a, 12a, is formed with wavy irregularities so that it is difficult for the operator to slip when his or her feet are placed on the footrest.

A connecting portion 15 is provided at the lower end of the pair of plate-like members 11a, 11a of the holding portion 11. The connecting portion 15 has a pair of engagement grooves 15h, 15h that are engaged with the main body portion 4a of the step 4 when the gangway 10 of this embodiment is connected to the step 4. The pair of engagement grooves 15h, 15h are upwardly recessed grooves having openings at the lower edges of the pair of plate-like members 11a, 11a, and the depth thereof is longer than the height of the main body portion 4a of step 4. , whose width is longer than the thickness of the main body portion 4a of step 4 (see FIG. 4(B)). The pair of engagement grooves 15h, 15h are provided at positions overlapping each other when the ramp 10 of this embodiment (that is, the pair of plate-like members 11a, 11a of the holding part 11) is viewed from the side. . In other words, the pair of engagement grooves 15h, 15h can simultaneously engage the main body portion 4a of step 4 when connecting the ramp 10 of this embodiment to step 4. It is formed like this. Moreover, the pair of engagement grooves 15h, 15h are formed such that when engaged with the main body part 4a of the step 4, the foot rest part 12 is located outward from the outer end of the shoe 3s of the crawler 3 ( (See Figures 5 and 6).

Further, a plate-shaped fixing member 15a fixed between the pair of plate-shaped members 11a, 11a is provided near the pair of engagement grooves 15h, 15h. This fixing member 15a is located on one side edge side of the pair of engagement grooves 15h, 15h (in FIG. 2, on the left side with respect to the engagement groove 15h), and its surface is the same as that of the pair of plate-like members 11a, 11a. It is provided parallel to the height direction. A plate-shaped moving member 15b is provided on the other side edge side of the fixed member 15a (in FIG. 2, on the right side with respect to the fixed member 15a). The movable member 15b has a surface facing the surface of the fixed member 15a, and can move toward and away from the fixed member 15a by means of a plurality of connecting members 16 (four connecting members 16 in FIGS. 1 and 2), and can both move toward and away from the fixed member 15a. It is provided so that the distance between them can be maintained at a predetermined distance. For example, a bolt 16b and a nut 16a can be used as the connecting member 16. When the bolt 16b and nut 16a are used as the connecting member 16, the plurality of connecting members 16 are provided on the fixed member 15a and the movable member 15b as follows.

First, a plurality of through holes are formed in the fixed member 15a and the moving member 15b at positions corresponding to each other, and a connecting member 16 is provided in each of the plurality of through holes. Specifically, the bolt 16b is inserted from the movable member 15b side into a through hole of the fixed member 15a and a through hole of the movable member 15b, which are formed at mutually corresponding positions. Further, the tip of the bolt 16b protrudes from the fixing member 15a, and the nut 16a is screwed into the portion protruding from the fixing member 15a. Note that the nut 16a may be fixed to a surface on one side edge side (the left side surface in FIG. 2) of the fixing member 15a. With this configuration, the movable member 15b can be moved toward and away from the fixed member 15a by tightening or loosening the bolt 16b, and the main body 4a of step 4 can be sandwiched between the fixed member 15a and the movable member 15b. can be retained. The plurality of through holes formed in the fixed member 15a and the moving member 15b are such that the distance between the upper through hole and the lower through hole (in the case of FIG. 4, the distance in the vertical direction) is the same as that of the main body 4a in step 4. It is formed to be longer than it is tall.

<Installation of gangway 10 of this embodiment>
Since the ramp 10 of this embodiment has the above structure, the ramp 10 of this embodiment can be connected and fixed to the step 4 of the crawler 3 in the following manner.

First, the connecting member 16 inserted through the upper through hole is loosened so that the distance between the moving member 15b and the fixed member 15a is longer than the thickness of step 4, and the connecting member 16 inserted through the lower through hole is , removed from the moving member 15b and the fixed member 15a.

Next, the ramp 10 of this embodiment is placed over the step 4 of the crawler 3 from above with one side edge of the pair of plate-like members 11a, 11a facing the crawler 3. That is, the ramp 10 of this embodiment is placed over the step 4 so that the main body portion 4a of the step 4 is accommodated in the pair of engagement grooves 15h, 15h. Then, the ramp 10 of this embodiment can be connected to step 4.

When the ramp 10 of this embodiment is connected in step 4, the connecting member 16 that was removed is attached to the moving member 15b and the fixed member 15a (see FIG. 3(A)). Then, when all the connecting members 16 are tightened, the movable member 15b moves closer to the fixed member 15a, and the mutually opposing surfaces of the movable member 15b and the fixed member 15a come into contact with the surface of the main body 4a in step 4. (See Figure 3(B)). When the connecting member 16 is further tightened from this state, the main body part 4a of the step 4 is sandwiched between the moving member 15b and the fixed member 15a, and the ramp 10 of this embodiment can be fixed to the main body part 4a of the step 4.

When the ramp 10 of this embodiment is arranged at step 4 as described above, the footrests 12 of the plurality of stages are located outward from the outer ends of the shoes 3s of the crawler, and moreover, the footrests 12 of the uppermost stage The footrest surface is located above the upper surface of the shoe 3s of the crawler. Therefore, when the worker ascends the ramp 10, he can reliably and easily move to the upper surface of the shoe 3s of the crawler. Workers can easily board the vehicle. Furthermore, when the worker gets off the driver's seat, the footrest 12 at the top of the gangway 10 can be clearly seen, so the worker can use the ramp 10 to get off the driver's seat safely and easily. .

Moreover, the gangway 10 of this embodiment engages the pair of engagement grooves 15h, 15h of the pair of plate-like members 11a, 11a with the main body part 4a of the step 4, and connects the movable member 15b and the fixed member 15a by means of the connecting member 16. The main body portion 4a of step 4 is only sandwiched between the two. Therefore, the ramp 10 of this embodiment can be easily attached to the step 4 and used in a necessary situation, and can be easily removed when it is no longer needed.

Furthermore, in the ramp 10 of this embodiment, most of the holding part 11, foot rest part 12, and connecting part 15 are formed of plate-like members, so the structure of the ramp 10 can be simplified and the ramp 10 can be made lightweight. Since it is possible to improve the handling of the ramp 10.

<About the structure of the ramp 10 of this embodiment>
The width w, height H, and depth d of the ramp 10 of this embodiment are not particularly limited. It is only necessary that the ramp 10 be formed so that it can be easily installed on the step 4 and that workers can easily get on and off using the ramp 10. Specifically, the width w of the ramp 10 (see FIG. 2(A)) may be slightly narrower than the width of the main body portion 4a of step 4. In addition, the height H of the ramp 10 (see FIG. 2(B)) is such that when the ramp 10 is installed on the step 4, the footrest surface of the footrest 12 located at the top is the upper surface of the shoe 3s of the crawler 3. It suffices if it is formed to be located above. In addition, the depth d of the ramp 10 (see FIG. 2(B)) is set so that the footrest 12 can be placed further outward than the outer end of the shoe 3s of the crawler 3 when the ramp 10 is installed on the step 4. It suffices if it is formed (see FIGS. 5 and 6).

For example, if the ramp 10 of this embodiment is installed in a 0.25 to 1.4 m class ³ back four, the ramp 10 will have a width W of about 250 to 350 mm, a height H of 400 mm or more, Its depth d can be about 150 to 250 mm, preferably its width w can be about 280 mm, its height H can be 500 mm or more, and its depth d can be about 200 mm. In addition, if the ramp 10 of this embodiment is installed in a 0.1 to 0.2 m class ³ back four, the ramp 10 has a width W of about 150 to 250 mm, a height H of 400 mm or more, Its depth d can be about 150 to 250 mm, preferably its width w can be about 280 mm, its height H can be 500 mm or more, and its depth d can be about 200 mm.

In addition, in the gangway 10 of this embodiment, when the ramp 10 is installed on the step 4, the footrest surface of the footrest 12 located at the top is not necessarily located above the upper surface of the shoe 3s of the crawler 3. You don't have to. In other words, when the ramp 10 is installed on the step 4, the footrest surface of the footrest part 12 located at the top is at the same height as the top surface of the shoe 3s of the crawler 3 or lower than the top surface of the shoe 3s of the crawler 3. It's okay. Even in this case, when the worker puts his or her feet on the foot rest surface of the foot rest part 12 located at the top and goes up and down, the worker moves from the shoe 3s of the Clara 3 to the ramp 10 or from the ramp 10 to the shoe of Clara 3. It suffices if it is formed at a height that makes it easy to move to 3s.

<About the holding part 11>
The size, thickness, material, etc. of the pair of plate-like members 11a, 11a of the holding portion 11 are not particularly limited. Even if the ramp 10 is installed at the step 4 and a worker stands on the footrest 12, the ramp 10 may be formed so as to have enough strength to withstand the load (i.e., not deform). The pair of plate-like members 11a, 11a can be formed using, for example, iron plates with a thickness of about 9 to 12 mm.

Further, in the above example, a case has been described in which the side edges of the pair of plate-like members 11a, 11a are formed in a stepped shape, but the shape of the side edges of the pair of plate-like members 11a, 11a is not particularly limited. . The pair of plate-like members 11a, 11a may have a shape that does not interfere with the shoes 3s of the crawler 3 when the ramp 10 of this embodiment is attached to the main body 4a of step 4. For example, when the ramp 10 of this embodiment is attached to the main body 4a of step 4, it may have a shape that has a notch that can accommodate the shoe 3s of the crawler 3 at a position corresponding to the shoe 3s of the crawler 3. .

Further, in the above example, a case has been described in which the holding portion 11 is formed of the pair of plate-like members 11a, 11a, but the holding portion 11 does not necessarily need to be formed of the pair of plate-like members 11a, 11a. The holding portion 11 may be formed of only one plate member 11a. In other words, in the case of the footrest 12 as shown in FIG. 1, the ramp 10 may have a structure in which the plate 12a of the footrest 12 is supported in a cantilever by one plate member 11a. Alternatively, the ramp 10 may have a structure in which the footrest 12 is installed on the surface of a single board so that the surface of the board is horizontal.

<About the footrest 12>
In the above example, the case where three stages of footrests 12 are provided has been described, but the number of footrests 12 to be provided is not particularly limited. As shown in FIG. 4, the footrests 12 may be provided in only two stages, or may be provided in four or more stages. The distance L1 (see FIG. 2(C)) between the footrest surfaces of the footrests 12 arranged one above the other may be such that the distance is such that the operator can easily get on and off the footrests. For example, the distance L1 is preferably about 290 to 310 mm.

Further, in the above example, a case has been described in which the footrest 12 is formed by only two plate materials 12a, but the shape and structure of the footrest 12 are not particularly limited. Any shape may be used as long as the worker can stably move up and down by placing his or her feet on the footrest surface of the footrest part 12. For example, a board may be provided on the upper ends of the two boards 12a to form the footrest 12, or the two boards 12a may not be provided and the top surface may be horizontal when the ramp 10 is installed at step 4. The footrest 12 may be formed by installing a plate between the pair of plate-like members 11a, 11a.

<About the connecting part 15>
In the above example, in a state where the main body part 4a of step 4 is engaged with the engagement groove 15h of the pair of plate-like members 11a, 11a, the main body part 4a of step 4 is sandwiched between the fixed member 15a and the moving member 15b, and the connecting part The case where the movement of the fixed member 15a and the movable member 15b is fixed in step 16 and the ramp 10 of this embodiment is fixed in step 4 has been described. The configuration in which the connecting portion 15 fixes the ramp 10 of this embodiment to the step 4 is not limited to the above configuration. Any configuration may be used as long as the ramp 10 of this embodiment can be fixed to the step 4 so that the worker can stably move up and down the ramp 10.

Further, the connecting portion 15 may be configured only by the engaging groove 15h. That is, when connecting the ramp 10 of this embodiment to the step 4, the main body portion 4a of the step 4 may only be engaged with the engagement groove 15h.

Alternatively, the retaining portion 11 of the ramp 10 may be connected to the step 4 with bolts or the like without providing the engagement groove 15h, and the ramp 10 of this embodiment may be connected to the step 4.

The gangway of the present invention is suitable for use by being attached to crawler type construction machinery.

1 Heavy equipment 2 Crane main body 3 Crawler 4 Step 4a Main body part 4b Connecting part 10 Ramp 11 Holding part 11a Plate member 11a
12 Foot rest part 12a Plate member 15 Connecting part 15a Fixed member 15b Moving member 16 Connecting member

Claims (6)

A ramp that is removably attached to a step provided on a crawler frame of heavy equipment having a crawler,
a footrest having a footrest surface on which to place the foot;
a holding part that holds the footrest;
a connecting portion that removably connects the holding portion to the step;
The foot rest part is
The ramp is attached to the holding part so that when the holding part is connected to the step by the connecting part, the footrest surface located at the top is located above the step. The step is
It has a main body that is provided with a gap between it and the crawler frame,
The connecting portion is
The ramp according to claim 1, further comprising an engagement groove having an opening at the lower end and engaging with the main body of the step. The connecting portion is
a fixing member fixed to the holding part;
a moving member that is provided so as to be able to approach and move away from the fixed member;
a connecting member that holds the main body of the step sandwiched between the movable member and the fixed member when the main body of the step is engaged with the engagement groove; The gangway according to claim 2, characterized in that: The holding part is
It has a pair of plate-like members provided so as to sandwich the footrest,
The connecting portion is provided at the lower end portions of the pair of plate-like members,
3. The gangway according to claim 2, wherein engagement grooves for the connecting portions are provided at lower end portions of the pair of plate-like members, respectively. It has a plurality of the footrests,
The plurality of footrests are
The gangway according to claim 1, characterized in that, in a state where the holding section is connected to the step by the connecting section, the ramps are arranged so as to be lined up in the vertical direction. The holding part is
It has a pair of plate-like members whose surfaces face each other,
The ramp according to claim 5, wherein the plurality of footrests are provided between the pair of plate-like members.

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