JP2020165196A - Scaffold structure for construction machine - Google Patents

Abstract

To make it possible to easily perform work for attaching and detaching a scaffold member.SOLUTION: A scaffold member 20 is provided with a scaffold bracket 22. A revolving frame 3 is provided with a support bracket 35. A support pin 36 of the support bracket 35 is fitted into a fitting recess 28 of the scaffold bracket 22. A lock pin 41 of a lock member 40 slides between a lock position in which the lock pin 41 is inserted into a scaffold-side lock hole 26 and a support-side lock hole 37 and a release position in which the lock pin 41 is removed from the scaffold-side lock hole 26 and the support-side lock hole 37.SELECTED DRAWING: Figure 10

Description

The present invention relates to a scaffolding structure for construction machinery.

Conventionally, when transporting a construction machine to a construction site, it is necessary to mount the construction machine on a transport vehicle such as a truck or a trailer, but the load width that can be transported by the transport vehicle is limited by the Road Law. Therefore, if the scaffolding member projects from the side of the upper swing body, the load width limit may be exceeded.

Patent Document 1 discloses a configuration in which a bolt hole is provided on a side portion of a swing frame (swing frame) of a construction machine, and a scaffolding member (step) is detachably attached with a bolt. As a result, when transporting the construction machine, the bolts are loosened and the scaffolding member is removed so that the load width of the transport vehicle is within the limit.

Square root extraction No. 5-32451

However, the invention of Patent Document 1 has a problem that it takes time and effort to attach / detach the scaffolding member.

Specifically, when attaching the scaffolding member to the swivel frame, a plurality of workers lift the scaffolding member, and another hole for inserting the bolt of the scaffolding member and the bolt hole of the swivel frame are aligned with each other. The operator must tighten the bolts. Further, it is necessary to securely tighten the bolts so that the scaffolding member does not fall off, but the torque management of the bolts may vary depending on the operator.

The present invention has been made in view of such a point, and an object of the present invention is to make it possible to easily attach / detach a scaffold member.

The present invention targets a scaffolding structure of a construction machine including an upper swivel body and a scaffolding member projecting outward from a side portion of the swivel frame of the upper swivel body, and has taken the following solutions.

That is, the first invention describes the scaffolding bracket provided on the scaffolding member and the scaffolding bracket.
A support bracket having a support pin for supporting the scaffolding bracket and provided on the swivel frame,
A lock member having a lock pin for detachably locking the scaffolding bracket to the support bracket is provided.
The scaffolding bracket has a fitting recess that opens downward and into which the support pin is fitted, and a scaffolding-side lock hole through which the lock pin is inserted.
The support bracket has a support side lock hole through which the lock pin is inserted.
The lock member includes a lock position in which the lock pin is inserted into the scaffold side lock hole and the support side lock hole, and a release position in which the lock pin is removed from the scaffold side lock hole and the support side lock hole. The lock pin is configured to slide between the lock pins.

In the first invention, the fitting recess of the scaffolding bracket is fitted into the support pin of the support bracket. The lock pin of the lock member slides between the lock position inserted into the scaffold side lock hole and the support side lock hole and the release position removed from the scaffold side lock hole and the support side lock hole.

As a result, the scaffolding member can be easily attached and detached. Specifically, when attaching the scaffolding member to the support bracket, the operator lifts the scaffolding member and fits the fitting recess of the scaffolding bracket into the support pin of the support bracket. At this time, since the weight of the scaffolding member is supported by the support pins of the support bracket, it is possible to reduce the weight burden on the scaffolding member received by the operator during the attachment work of the scaffolding member.

Further, the scaffolding bracket and the support bracket can be locked by simply sliding the lock pin of the lock member. Therefore, unlike the case where the scaffolding bracket and the support bracket are fastened with the fastening bolts, it is not necessary to perform the tightening work of the fastening bolts and the torque management of the fastening bolts, and the scaffolding member can be attached in a short time.

The second invention is the first invention.
The side portion of the swivel frame is formed in a tubular shape so as to extend in the front-rear direction and have a space inside.
An opening through which the scaffolding bracket and the lock member can be inserted is formed on the side portion of the swivel frame.
The support bracket is arranged inside the swivel frame.

In the second invention, an opening is formed on the side portion of the swivel frame. A support bracket is arranged inside the swivel frame. Then, the scaffolding bracket and the lock member are inserted through the opening, and the scaffolding bracket and the support bracket are locked by the lock member.

Since the support bracket is arranged inside the swivel frame in this way, the support bracket does not pop out from the side portion of the swivel frame when the scaffolding member is removed from the swivel frame. As a result, the vehicle width of the upper swing body can be kept within the load width limit of the transport vehicle.

The third invention is the first or second invention.
The lock member has a lock pin, a guide pin arranged along the lock pin at a distance from each other, and a connecting portion for connecting the lock pin and the guide pin.
The scaffolding bracket has a guide hole through which the guide pin is inserted.

In the third invention, the lock member has a lock pin, a guide pin, and a connecting portion. The lock pin and the guide pin are arranged so as to be spaced apart from each other. The guide pin is inserted into the guide hole of the scaffolding bracket.

As a result, when the lock pin is slid toward the scaffolding side lock hole and the support side lock hole, the guide pin moves along the guide hole, so that the lock pin can be prevented from being tilted. ..

The fourth invention is the third invention.
The scaffolding member has a holding portion that movably holds the connecting portion along the sliding direction of the lock pin.
The holding portion has an elongated hole extending along the sliding direction of the lock pin.
The connecting portion is provided with a handle portion that protrudes from the elongated hole and can move along the elongated hole.

In the fourth invention, the connecting portion of the lock member is held by the holding portion so as to be movable in the sliding direction. The connecting portion is provided with a handle portion protruding from the elongated hole of the holding portion. Then, by moving the handle portion along the elongated hole, the operation of moving the lock pin in the sliding direction can be easily performed.

The fifth invention is the third or fourth invention.
At the lock position, the lock pin is inserted through the scaffolding side lock hole and the support side lock hole, while the guide pin is inserted through the guide hole.
At the release position, the lock pin is removed from the scaffolding side lock hole and the support side lock hole, while the guide pin is inserted into the guide hole.

In the fifth invention, the guide pin is inserted into the guide hole at both the lock position and the release position. As a result, even when the lock pin is removed from the scaffolding side lock hole and the support side lock hole, the guide pin remains inserted in the guide hole, and the lock member can be prevented from falling off from the scaffolding bracket.

According to the present invention, the scaffolding member can be easily attached and detached.

It is a side view which shows the whole structure of the construction machine which concerns on this embodiment. It is a perspective view which shows the whole structure of a construction machine. It is a perspective view which shows the state which the scaffolding member was removed from a swivel frame. It is a perspective view which shows the structure of the scaffolding bracket. It is a rear view which shows the state which the scaffolding member was removed from a swivel frame. It is a top view which shows the state which the scaffolding member was removed from a swivel frame. It is a perspective view which shows the structure of the lock member. It is a perspective view when the lock pin is slid to the lock position. It is a rear view which shows the state which the scaffolding member was attached to the swivel frame. It is a top view which shows the state which the scaffolding member is attached to the swivel frame. It is a perspective view which shows the state before attaching the scaffolding member to a swivel frame. It is a perspective view which shows the state which attached the scaffolding member to a swivel frame.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is essentially merely an example and is not intended to limit the present invention, its application or its use. In each figure, the up / down and front / back / left / right directions are indicated by arrows. Unless otherwise specified, the directions such as up and down will be described according to the directions indicated by these arrows.

As shown in FIGS. 1 and 2, the construction machine 10 includes a crawler-type lower traveling body 1 and an upper rotating body 2 rotatably mounted on the lower traveling body 1.

The upper swivel body 2 includes a swivel frame 3 as a vehicle body frame, an attachment 4 provided on the front end side of the swivel frame 3 for excavating earth and sand, a cab 5, a machine room 6, and a swivel frame 3. It is provided on the end side and is provided with a counterweight 7 for balancing the weight with the attachment 4.

The attachment 4 is rotatably attached to the boom 11 whose base end side is rotatably attached to the swivel frame 3, the arm 12 rotatably attached to the tip end side of the boom 11, and the tip end side of the arm 12. It is provided with the bucket 13.

The cab 5 is a driver's cab equipped with a driver's seat, various control devices, operation devices, and the like. The cab 5 is arranged on the front left side of the upper swing body 2 so as to be adjacent to the left side of the attachment 4.

The machine room 6 is provided at the rear portion of the upper swing body 2 between the left and right sides. A counterweight 7 is arranged on the rear side of the machine room 6. A hydraulic oil tank 15 for storing hydraulic oil is disposed in the left front portion of the machine room 6. A fuel tank 16 for storing fuel is arranged in the right front portion of the machine room 6.

A safety fence 17 is erected above the machine room 6 and the counterweight 7 in order to ensure the safety of the operator riding on the machine room 6 and the counterweight 7. Further, on the right front side of the turning frame 3, a handrail 18 is erected to assist the operator in getting on and off the vehicle.

A plurality of scaffolding members 20 are provided on the left side portion 30 of the turning frame 3 so as to be arranged in the front-rear direction of the vehicle (four in the example shown in FIG. 2). The scaffolding member 20 is detachably attached to the swivel frame 3.

As shown in FIG. 3, the side portion 30 of the swivel frame 3 is composed of a plate-shaped member extending in the front-rear direction and having an upper end portion and a lower end portion bent inward of the vehicle (to the right in FIG. 3). .. By being attached to the vehicle body side, the side portion 30 of the swivel frame 3 is formed in a tubular shape so as to extend in the front-rear direction and have a space inside.

A plurality of openings 31 are formed in the side portion 30 of the swivel frame 3 at intervals in the front-rear direction. A pair of support brackets 35 are provided inside the swivel frame 3.

The scaffolding member 20 has a tread plate 21 that constitutes a tread surface and a scaffold bracket 22 that supports the tread plate 21. The tread plate 21 is made of, for example, an aluminum alloy. The scaffolding bracket 22 is made of, for example, steel. In this way, by dividing the scaffolding member 20 into a tread plate 21 and a scaffolding bracket 22 and selecting a material according to the strength and mass required for each part, it is possible to reduce the weight of the scaffolding member 20 as a whole. it can.

Two scaffolding brackets 22 are provided at intervals in the front-rear direction. The scaffolding bracket 22 is provided with a lock member 40. The opening 31 of the swivel frame 3 is formed at a position and size into which the scaffolding bracket 22 and the lock member 40 can be inserted. The opening 31 through which the scaffolding bracket 22 can be inserted is formed in a rectangular shape extending in the vertical direction. The opening 31 through which the lock member 40 can be inserted is formed in a rectangular shape extending in the front-rear direction.

As shown in FIGS. 4 to 6, the scaffolding bracket 22 has a vertical plate 23 that is erected in the vertical direction and a lateral plate that projects from the vertical plate 23 to the outside of the vehicle (to the left in FIG. 5) to support the tread plate 21. It has a plate 24 and a mounting plate 25 on which the lower plate 47 of the lock member 40 is mounted.

The mounting plate 25 is formed of a plate material having an L-shaped cross section that projects forward from the vertical plate 23. The lower plate 47 of the lock member 40 extends forward along the horizontal plane of the mounting plate 25 and is fixed to the horizontal plane of the mounting plate 25.

The lock member 40 has a lock pin 41 that detachably locks the scaffolding bracket 22 with respect to the support bracket 35.

The scaffolding side lock hole 26 and the guide hole 27 are formed in the vertical plate 23. The lock pin 41 of the lock member 40 is inserted into the scaffolding side lock hole 26. The guide pin 42 of the lock member 40 is inserted into the guide hole 27.

The vertical plate 23 is formed with a fitting recess 28. The fitting recess 28 opens below the vertical plate 23 and is fitted into the support pin 36 of the support bracket 35.

A pair of support brackets 35 are provided at intervals in the front-rear direction. A support pin 36 is attached to the support bracket 35. The support pin 36 extends across the pair of support brackets 35. The support pin 36 is arranged at a position visible from the opening 31 of the side portion 30 of the swivel frame 3.

The support bracket 35 is formed with a support side lock hole 37. The lock pin 41 of the lock member 40 is inserted into the support side lock hole 37.

Inside the swivel frame 3, a rib portion 32 for connecting the upper end plate and the lower end plate of the swivel frame 3 is provided. A pair of rib portions 32 are provided at intervals in the front-rear direction with the support bracket 35 interposed therebetween. A positioning plate 33 is arranged inside the vehicle (on the right side in FIG. 5) of the pair of rib portions 32 and the pair of support brackets 35. The positioning plate 33 is fastened to a pair of rib portions 32 and a pair of support brackets 35.

As shown in FIGS. 7 and 8, the lock member 40 connects the lock pin 41, the guide pins 42 arranged at intervals along the lock pins 41, and the lock pins 41 and the guide pins 42. It has a connecting portion 43 to be formed. As will be described in detail later, the lock pin 41 of the lock member 40 can be slidably moved between the lock position (see FIG. 10) and the release position (see FIG. 6).

The guide pin 42 is formed with a lock position hole 42a and a release position hole 42b. The lock position hole 42a is located behind the vertical plate 23 of the scaffolding bracket 22 when the lock pin 41 is positioned at the lock position (see FIG. 10). At the lock position, the retaining pin 48 is inserted into the lock position hole 42a. The retaining pin 48 regulates the lock pin 41 from moving from the locked position to the released position.

The release position hole 42b is located behind the vertical plate 23 of the scaffolding bracket 22 when the lock pin 41 is positioned at the release position (see FIG. 6). At the release position, the retaining pin 48 is inserted into the release position hole 42b.

Further, at the release position, the handle portion 44 is in contact with the front edge portion of the elongated hole 46 of the holding portion 45, which will be described later. As a result, the lock pin 41 is restricted from moving forward from the release position.

The lower plate 47 of the lock member 40 is provided with a plate-shaped holding portion 45 extending in the front-rear direction. The holding portion 45 restricts the vertical movement of the connecting portion 43 by sandwiching the connecting portion 43 with the lower plate 47. The holding portion 45 movably holds the connecting portion 43 along the sliding direction of the lock pin 41.

The holding portion 45 is formed with an elongated hole 46 extending along the sliding direction of the lock pin 41. The connecting portion 43 is provided with a handle portion 44 extending from the elongated hole 46. The handle portion 44 is movable along the elongated hole 46.

As shown in FIGS. 9 and 10, when the scaffolding member 20 is attached to the swivel frame 3, the scaffolding bracket 22 and the lock member 40 are inserted into the opening 31 of the swivel frame 3. The fitting recess 28 of the scaffolding bracket 22 is fitted into the support pin 36 of the support bracket 35.

Since the support bracket 35 is arranged inside the swivel frame 3, the support bracket 35 does not pop out from the side portion 30 of the swivel frame 3 when the scaffolding member 20 is removed from the swivel frame 3. As a result, the vehicle width of the upper swing body 2 can be kept within the load width limit of the transport vehicle.

The lock pin 41 of the lock member 40 is removed from the lock position (shown by the solid line in FIG. 10) inserted into the scaffolding side lock hole 26 and the support side lock hole 37, and from the scaffolding side lock hole 26 and the support side lock hole 37. It slides to and from the release position (shown by a virtual line in FIG. 10).

At the lock position, the lock pin 41 is inserted through the scaffolding side lock hole 26 and the support side lock hole 37, while the guide pin 42 is inserted through the guide hole 27 (see FIG. 10). At the release position, the lock pin 41 is removed from the scaffolding side lock hole 26 and the support side lock hole 37, while the guide pin 42 is inserted through the guide hole 27 (see FIG. 6).

In this way, the guide pin 42 is inserted into the guide hole 27 at both the lock position and the release position. As a result, even when the lock pin 41 is removed from the scaffolding side lock hole 26 and the support side lock hole 37, the guide pin 42 remains inserted in the guide hole 27, and the lock member 40 is prevented from falling off from the scaffolding bracket 22. It can be suppressed.

As described above, according to the scaffolding structure of the construction machine according to the present embodiment, the scaffolding member 20 can be easily attached and detached. Specifically, as shown in FIG. 11, when the scaffolding member 20 is attached to the support bracket 35, the operator lifts the scaffolding member 20 and attaches the fitting recess 28 of the scaffolding bracket 22 to the support pin 36 of the support bracket 35. Try to fit.

At this time, since the weight of the scaffolding member 20 is supported by the support pin 36 of the support bracket 35, the weight burden of the scaffolding member 20 received by the operator during the attachment work of the scaffolding member 20 can be reduced. it can.

Then, when the scaffolding member 20 is rotated around the support pin 36 and the scaffolding bracket 22 is brought into contact with the positioning plate 33, the hole positions of the scaffolding side lock hole 26 and the support side lock hole 37 can be aligned.

Then, as shown in FIG. 12, the scaffolding bracket 22 and the support bracket 35 can be locked by simply sliding the lock pin 41 of the lock member 40. Therefore, unlike the case where the scaffolding bracket 22 and the support bracket 35 are fastened with the fastening bolts, it is not necessary to perform the tightening work of the fastening bolts and the torque management of the fastening bolts, and the scaffolding member can be attached in a short time. it can.

As described above, the present invention is extremely useful and has high industrial applicability because it has a highly practical effect that the scaffolding member can be easily attached and detached.

2 Upper swivel body 3 Swivel frame 10 Construction machine 20 Scaffolding member 22 Scaffolding bracket 26 Scaffolding side lock hole 27 Guide hole 28 Fitting recess 30 Side part 31 Opening opening 35 Support bracket 36 Support pin 37 Support side lock hole 40 Lock member 41 Lock Pin 42 Guide pin 43 Connecting part 44 Handle part 45 Holding part 46 Long hole

Claims (5)

It is a scaffolding structure of a construction machine including an upper swivel body and a scaffolding member protruding outward from a side portion of the swivel frame of the upper swivel body.
The scaffolding bracket provided on the scaffolding member and
A support bracket having a support pin for supporting the scaffolding bracket and provided on the swivel frame,
A lock member having a lock pin for detachably locking the scaffolding bracket to the support bracket is provided.
The scaffolding bracket has a fitting recess that opens downward and into which the support pin is fitted, and a scaffolding-side lock hole through which the lock pin is inserted.
The support bracket has a support side lock hole through which the lock pin is inserted.
The lock member includes a lock position in which the lock pin is inserted into the scaffold side lock hole and the support side lock hole, and a release position in which the lock pin is removed from the scaffold side lock hole and the support side lock hole. A scaffolding structure for construction machinery in which the lock pin is configured to slide between. In claim 1,
The side portion of the swivel frame is formed in a tubular shape so as to extend in the front-rear direction and have a space inside.
An opening through which the scaffolding bracket and the lock member can be inserted is formed on the side portion of the swivel frame.
The support bracket is a scaffolding structure for a construction machine arranged inside the swivel frame. In claim 1 or 2,
The lock member has a lock pin, a guide pin arranged along the lock pin at a distance from each other, and a connecting portion for connecting the lock pin and the guide pin.
The scaffolding bracket is a scaffolding structure for a construction machine having a guide hole through which the guide pin is inserted. In claim 3,
The scaffolding member has a holding portion that movably holds the connecting portion along the sliding direction of the lock pin.
The holding portion has an elongated hole extending along the sliding direction of the lock pin.
A scaffolding structure for a construction machine, wherein the connecting portion is provided with a handle portion that protrudes from the elongated hole and is movable along the elongated hole. In claim 3 or 4,
At the lock position, the lock pin is inserted through the scaffolding side lock hole and the support side lock hole, while the guide pin is inserted through the guide hole.
At the release position, the scaffolding structure of a construction machine in which the lock pin is removed from the scaffolding side lock hole and the support side lock hole, while the guide pin is inserted into the guide hole.

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