Hydraulic unit

Abstract

The present invention provides a hydraulic unit that allows for the safe installation and removal of safety poles in the corners of ceilings without requiring work at height. [Solution] A hydraulic unit 11 comprising a frame 12, a hydraulic power source device mounted on the frame, a rectangular parallelepiped-shaped cover body 13 housing the hydraulic power source device, four corner members 14 forming vertically extending corner spaces S at each of the four corners of the cover body, and four lifeline poles 15 positioned in each corner space so as to be operable from the ground, wherein the corner members are provided with support parts 16 that support the lifeline poles in an immersed support position where they are immersed in and supported against the ceiling 13d of the cover body, and a protruding support position where they are supported protruding outwards.

Description

Technical Field

[0001] The present invention relates to a hydraulic unit, and more particularly to a hydraulic unit that generates hydraulic pressure as an external power source for construction machinery.

Background Art

[0002] When an operator assembles construction machinery, there is a risk of the operator falling from a height. As a countermeasure, a plurality of main ropes are installed at the part that serves as a work scaffold, and a main rope is stretched between them (see, for example, Patent Document 1). The operator can safely perform high-altitude work by freely locking the hook of the safety belt worn on the body to the main rope.

[0003] Also, a portable hydraulic unit used as an external power source for construction machinery is known (see, for example, Patent Document 2). The hydraulic unit has component devices such as an engine and a hydraulic pump mounted on a mounting table, and forms a rectangular parallelepiped (box shape) covered with a cover body having a soundproof structure (also referred to as a house, a casing, etc.) so as to cover them.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] [[ID= forty-three ]] Although the hydraulic unit described in Patent Document 2 is portable, its overall height is quite high. When climbing onto the ceiling of the cover body during the assembly or maintenance of the ceiling structure, the installation of main rope poles increases safety. However, when installing the main rope poles, the four corners of the ceiling are essential, but the work itself becomes high-altitude work on a narrow scaffold.

[0006] Therefore, the present invention aims to provide a hydraulic unit that allows for the safe installation and removal of safety poles at the corners of ceilings without requiring work at height. [Means for solving the problem]

[0007] To achieve the above objective, the hydraulic unit of the present invention comprises a frame, a hydraulic power source device mounted on the frame, a rectangular parallelepiped-shaped cover body housing the hydraulic power source device, four corner members forming vertically extending corner spaces at each of the four corners of the cover body, and four lifeline poles positioned in each corner space so as to be operable from the ground, wherein the corner members are provided with support parts that support the lifeline poles in an immersed support position where they are immersed in and supported relative to the ceiling of the cover body, and a protruding support position where they are supported protruding from the ceiling.

[0008] Furthermore, the main rope pole has a support column with a circular cross-section, a locking part provided at the upper end of the support column to which one end of the main rope is locked, and an operating part provided at the lower end of the support column to which the support column is rotated between a first rotation direction corresponding to the immersed support position and a second rotation direction corresponding to the protruding support position, the support column is provided with an upper flange and a lower flange spaced apart in the vertical direction, and the support part consists of an upper support part and a lower support part spaced apart in the vertical direction, each opening in the vertical direction to the main rope pole The support column has an opening through which a rope pole is inserted, the upper flange extends outwards on both sides of the outer circumference of the support column and is placed on the opening of the upper support column in the recessed support position, the lower flange extends outwards on both sides of the outer circumference of the support column and is placed on the opening of the lower support column in the protruding support position, and the opening of the lower support column has a lower flange mounting portion that, in a plan view, does not overlap with the lower flange in the first rotation direction of the support column, but overlaps with the lower flange in the second rotation direction on which the lower flange is placed.

[0009] Furthermore, the lower flange mounting portion is characterized by having a stepped portion that the lower flange contacts to restrict the rotation of the support column.

[0010] Furthermore, the operating part is a rod-shaped body having a bent portion between a straight base end which is the attachment point to the support column and a straight tip end which is the handle portion, characterized in that the base end is arranged coaxially with the axis of the support column and the tip end is arranged parallel to a plane perpendicular to the axis of the support column. [Effects of the Invention]

[0011] According to the hydraulic unit of the present invention, the cover body is provided with four corner members that form corner spaces at each of its four corners, and four lifeline poles that are positioned in each corner space so as to be operable from the ground. The corner members are provided with support parts that support the lifeline poles in an immersed support position and an embossed support position, so that the installation and removal of lifeline poles in the corners of the ceiling can be performed safely without having to work at height.

[0012] Furthermore, the main rope pole is provided with an upper flange and a lower flange on the support column, and the lower support portion has a lower flange mounting portion on which the lower flange is placed without overlapping with the lower flange in a first rotation direction corresponding to the retracted support position of the support column, and overlapping with the lower flange in a second rotation direction corresponding to the protruding support position. As a result, the main rope pole can be installed and removed with a simple operation of rotating the support column from a lifted position. Moreover, a stepped portion is provided in the lower flange mounting portion to restrict the rotation of the support column, so that accidental rotation of the support column at the protruding support position can be prevented. [Brief explanation of the drawing]

[0013] [Figure 1] This is a perspective view showing a hydraulic unit illustrating one embodiment of the present invention, with the main rope pole removed from the ceiling. [Figure 2] This is a perspective view showing the main rope pole installed on the ceiling. [Figure 3]It is a front view of the main part of the hydraulic unit. [Figure 4] It is a perspective view of the main cable pole. [Figure 5] It is a perspective view of the lower support part seen from above. [Figure 6] It is a plan view showing the rotation direction of the support column in the lower support part. [Figure 7] It is a sectional view taken along the line VII-VII of FIG. 6. [Figure 8] It is a sectional view taken along the line VIII-VIII of FIG. 6. [Figure 9] It is a perspective view showing the state in which the main cable pole in the corner space is supported at the immersed support position. [Figure 10] It is also a perspective view showing the state in which the main cable pole is lifted. [Figure 11] It is also a perspective view showing the state in which the main cable pole is rotated and changed from the first rotation direction to the second rotation direction. [Figure 12] It is also a perspective view showing the state in which the main cable pole is supported at the protruding support position. [Figure 13] It is a hydraulic unit showing a modification of the present invention and is a plan view showing the rotation direction of the support column in the lower support part. [Figure 14] It is a sectional view taken along the line XIV-XIV of FIG. 13. [Figure 15] It is a sectional view taken along the line XV-XV of FIG. 13.

Embodiments for Carrying Out the Invention

[0014] Figs. 1 to 15 show an exemplary form of the hydraulic unit of the present invention. As shown in Figs. 1 and 2, the hydraulic unit 11 shown in this exemplary form has a rectangular parallelepiped (box-shaped) outer dimension defined in the longitudinal direction (X direction), the short side direction (Y direction), and the vertical direction (Z direction), and mainly includes a gantry 12 framed in a rectangular shape, an engine mounted on the gantry 12, a hydraulic pump driven by the engine, and a hydraulic source device (not shown) composed of a hydraulic oil tank for storing hydraulic oil, a rectangular parallelepiped cover body 13 for accommodating the hydraulic source device, four corner members 14 forming a corner space S extending in the vertical direction at each of the four corners A, B, C, D of the cover body 13, and four main ropes 15 respectively arranged in each corner space S so as to be operable from the ground.

[0015] The cover body 13 has a front surface (the front left side in Fig. 1) where a control panel 13a and a connection portion 13b for connecting a hydraulic hose (not shown) to a construction machine (for example, a tubing device) are arranged, a right side surface (the front right side in Fig. 1), four side walls 13c forming the rear surface and the left side surface (not shown) opposite thereto, and a ceiling 13d covering the upper portions of the side walls 13c.

[0016] The corner member 14 is a channel steel with a U-shaped cross-section erected on the gantry 12. Inside, a substantially square columnar corner space S is formed, the shape and size of which are generally defined by three surfaces including an inner wide surface 14a and inner narrow surfaces 14b, 14b continuous on both sides thereof. The corner space S is arranged facing the outside of the cover body 13 (in the Y direction in Figs. 1 and 2). Further, the corner member 14 is provided with a support portion 16 for supporting the main rope 15 at an immersion support position (the position in Fig. 1) where the main rope 15 is immersed and supported with respect to the ceiling 13d of the cover body 13 and at a protruding support position (the position in Fig. 2) where the main rope 15 protrudes and is supported at a certain height (details will be described later).

[0017] The ceiling 13d has suspension holes 13e in the longitudinal middle section along the front and rear surfaces of the cover body 13, with two on the front side and two on the rear side. This allows for four-point suspension using suspension ropes (not shown) when transporting the hydraulic unit 11. Immediately next to the suspension holes 13e on the ceiling 13d, there are vertical insertion openings 13f for detachably attaching lifeline poles 17 (four) or a ladder 18. The detachable lifeline poles 17 are shorter in length than the lifeline poles 15 that are permanently installed on the hydraulic unit 11, and when installed, their lower ends are held within the insertion openings 13f. This allows for the lifeline 19 to be stretched at a constant height along the periphery of the ceiling 13d when climbing onto the ceiling 13d to assemble or maintain ceiling structures (not shown) (Figure 2).

[0018] The specific configuration of the main rope pole 15 and its support portion 16 will be described below with reference to Figures 3 to 12. In this embodiment, the diagonally opposite corners of the cover body 13 (for example, A and C) in a plan view have the same configuration, while the corners at both ends of opposite sides (for example, A and D) have different configurations. Therefore, the configuration of corner A, formed by the front and right sides of the cover body 13, will be described below, and the configurations of the other corners B, C, and D will be omitted.

[0019] As shown in Figure 4, the lifeline pole 15 mainly consists of a hollow circular cross-section support column (round pipe) 20, a locking part 21 provided at the upper end of the support column 20 to which one end of the lifeline 19 is locked, and an operating part 22 provided at the lower end of the support column 20 to rotate the support column 20 by approximately 90° between a first rotation direction (Figure 6(a)) corresponding to an immersed support position (Figure 3(a)) and a second rotation direction (Figure 6(b)) corresponding to an immersed support position (Figure 3(b)). Note that the exploded perspective view of the lifeline pole 15 in Figure 4 corresponds to the first rotation direction of the support column 20, and the area enclosed in Figure 4 (perspective view of the upper part of the lifeline pole 15) corresponds to the second rotation direction of the support column 20.

[0020] The support column 20 is provided with an upper flange 23 and a lower flange 24 that are spaced apart in the vertical direction. The upper flange 23 has a cut surface 23a obtained by cutting off a portion of the outer circumference of the support column 20, and is roughly C-shaped when viewed from the axial direction of the support column 20. As a result, the upper flange 23 partially protrudes on both sides of the outer circumference of the support column 20, but due to the action of the cut surface 23a, the outer circumference of the support column 20 in the immersed support position can be brought into close contact with the inner wide surface 14a of the corner member 14, as can be seen from Figures 3, 4, and 6.

[0021] As shown in Figure 4, the lower flange 24 is provided on the connecting portion 25 for bolting the support column 20 and the operating portion 22 together. The connecting portion 25 is a disc shape that matches the cross-sectional shape (circular) of the support column 20, and consists of a support column side member 25a with tapped holes and an operating portion side member 25b with holes for passing bolts 26 through. Therefore, when bolted together, the operating portion side member 25b is part of the structure of the support column 20 together with the support column side member 25a.

[0022] The lower flange 24 is provided in a manner that it protrudes from both sides of the outer circumference of the support column 20 (operating part side member 25b). Specifically, as shown in Figure 6, on one protruding portion, a roughly triangular shape is formed by one side 24a including the tangent to the outer circumference of the support column 20 and the other side 24b which is perpendicular to it. The right-angle portion of the roughly triangular shape is rounded, and the side of the other side 24b opposite to the rounded side is sloped toward the outer circumference of the support column 20. Therefore, the lower flange 24 has a pair of flange portions that protrude symmetrically from both sides of the outer circumference of the support column 20. This allows the support column 20 to rotate between the first rotation direction (Figure 6(a)) and the second rotation direction (Figure 6(b)) while maintaining the axis (center of rotation) of the support column 20 in that position, that is, allowing the support column 20 to rotate smoothly while remaining in close contact with the inner wide surface 14a of the corner member 14.

[0023] As shown in Figure 4, the locking section 21 consists of a large and a small ring arranged at 90° angles to each other. The large ring 21a is used at the top of the support column 20 to secure the main rope 19 in the short direction (Y direction in Figure 4) of the cover body 13, and the small ring 21b is used on the outer circumference of the support column 20 to secure the main rope 19 in the long direction (X direction in Figure 4) of the cover body 13. The main rope 19 is connected to a safety harness (not shown) and serves as a lifeline to prevent workers from falling (Figure 2).

[0024] As shown in Figure 3 and other figures, the support section 16 consists of an upper support section 27 and a lower support section 28 that are spaced apart in the vertical direction, each having openings 27a and 28a that open vertically and allow the main rope pole 15 to pass through (see also Figure 9). The upper support section 27 and the lower support section 28 are independent members, but both are positioned in the upper half of the corner space S, which has a height from the top surface of the frame 12 to the ceiling 13d. The upper end of the opening 27a of the upper support section 27 is where the upper flange 23 is placed at the immersed support position of the main rope pole 15 (Figure 3(a)). On the other hand, the opening 28a of the lower support section 28 is where the lower flange 24 is placed at the protruding support position of the main rope pole 15 (Figure 3(b)).

[0025] The upper support portion 27 is formed as a cylindrical body by fixing a plate material, which is bent into a U-shape in cross-section, to the inner wide surface 14a of the corner member 14. Furthermore, the inner width (inner diameter) of the upper support portion 27 is formed to be slightly larger than the outer diameter of the support column 20, and a push bolt (wing bolt) 29 is provided in the center, which is screwed onto the outer circumference of the support column 20 so as to be able to be pressed.

[0026] As shown in Figures 5 and 6, the lower support portion 28 is a plate body having a notch shaped to match the contour (planar cross-sectional shape) of the support column 20 including the lower flange 24. The notch is closed and an opening 28a is formed by fixing the plate body to the inner surfaces (3 surfaces) 14a, 14b of the corner member 14. In addition, the lower support portion 28 has a pair of lower flange mounting portions 28b, 28b on which the pair of flanges of the lower flange 24 are placed, and which do not overlap with the lower flange 24 in the first rotation direction of the support column 20 (Figure 6(a)) in a plan view, but overlap with it in the second rotation direction (Figure 6(b)). The lower flange mounting portion 28b is provided with a stepped portion (vertical surface) 28c, which is created by partially cutting the thickness of the plate body to match the contour of the lower flange 24. As a result, when the lower flange 24 is placed on the lower flange mounting section 28b, the roughly triangular side of the flange portion of the lower flange 24 comes into contact with the stepped portion 28c, or in other words, it fits into the lower flange mounting section 28b, restricting the rotation of the support column 20 (see also Figure 12).

[0027] As shown in Figures 6 to 8, the operating section 22 is a rod-shaped body with two bent sections between a straight base end 22a, which is the attachment point to the support column 20, and a straight tip end 22b, which is the handle. The shorter base end 22a is positioned coaxially with the axis C of the support column 20, and the tip end 22b is positioned parallel to a plane (horizontal plane) H perpendicular to the axis C of the support column 20. A straight intermediate section 22c is provided between the two bent sections. This intermediate section 22c is perpendicular to the base end 22a and at an obtuse angle of approximately 135° with the tip end 22b. As a result, in the first rotation direction of the support column 20 (Figure 6(a)), the tip end 22b points in the longitudinal direction (X direction) along the front surface of the cover body 13, while in the second rotation direction (Figure 6(b)), it points in the short direction (Y direction) away from the front surface of the cover body 13.

[0028] The hydraulic unit 11 configured in this way is normally placed with the lifeline pole 15 removed from the ceiling 13d. However, when climbing onto the ceiling 13d of the cover body 13, the four lifeline poles 15, which are permanently installed at the corners of the cover body 13, are installed on the ceiling 13d during the setup work on the ground. Note that the state in which the lifeline pole 15 is removed from the ceiling 13d means the state in which the lifeline pole 15 is supported in the immersed support position (Figure 3(a)) by the support part 16 (Figure 1), and the state in which the lifeline pole 15 is installed on the ceiling 13d means the state in which the lifeline pole 15 is supported in the protruding support position (Figure 3(b)) by the support part 16 (Figure 2).

[0029] The installation procedure for the main rope pole 15 is described below. First, as shown in Figure 9, after releasing the pressure applied to the support column 20 by the push bolt 29 on the main rope pole 15, which is supported in the immersion support position, the operator grasps the operating part 22 and lifts the support column 20, and as shown in Figure 10, the lower flange 24, which has reached the position of the lower support part 28, is passed from the lower side to the upper side of the opening 28a. In this state, the operating part 22 comes into contact with the lower surface of the lower support part 28 and cannot be lifted any further.

[0030] Here, when the support column 20 is rotated approximately 90° from the first rotation direction to the second rotation direction, as shown in Figure 11, the lower flange 24 also changes direction by approximately 90° directly above the opening 28a, and the lower flange 24 and the lower flange mounting part 28b overlap in the vertical direction. In this state, the support column 20 is lowered and the lower flange 24 is placed on the lower flange mounting part 28b as shown in Figure 12. As a result, the lower flange mounting part 28b supports the support column 20, and the stepped part 28c acts to restrict the rotation of the support column 20 from the second rotation direction (Figure 6(b)) to the first rotation direction (Figure 6(a)). In this way, with the main rope pole 15 supported in the protruding support position, the push bolt 29 is tightened to prevent the support column 20 from rattling.

[0031] After installing the four lifeline poles 15 on the ceiling 13d, a ladder 18 is placed on the side wall (front) 13c of the cover body 13, and the four lifeline poles 17 that were carried to the ceiling 13d are placed in their designated positions, thereby stretching the lifeline 19 between each of the lifeline poles 15 and 17. In this way, a safe working platform is created on the ceiling 13d (Figure 2). When removing the four lifeline poles 15 from the ceiling 13d, the procedure is the reverse of the above. That is, the work can be carried out safely and without difficulty by operating from the ground, just as during installation.

[0032] Thus, the hydraulic unit 11 of the present invention comprises four corner members 14 that form corner spaces S at each of the four corners of the cover body 13, and four lifeline poles 15 that are positioned in each corner space S so as to be operable from the ground. Since the corner members 14 are provided with support parts 16 that support the lifeline poles 15 in an immersed support position and an embossed support position, the installation and removal of the lifeline poles 15 at the corners of the ceiling 13d can be performed safely without having to work at height.

[0033] Furthermore, the main rope pole 15 is provided with an upper flange 23 and a lower flange 24 on the support column 20, and the lower flange 24 is placed on the lower support portion 28 so as not to overlap with the lower flange 24 in a first rotation direction corresponding to the retracted support position of the support column 20, and overlapping with the lower flange 24 in a second rotation direction corresponding to the protruding support position. At this time, since the lower support portion 28 has a lower flange mounting portion 28b, the main rope pole 15 can be installed and removed with a simple operation of rotating the support column 20 from a lifted state. In addition, since a stepped portion 28c that restricts the rotation of the support column 20 is provided on the lower flange mounting portion 28b, unexpected rotation of the support column 20 in the protruding support position can be prevented.

[0034] In addition, since the tip 22b of the operating section 22 is positioned parallel to the plane H perpendicular to the axis C of the support column 20, the handle portion (tip 22b) can be moved away from the axis C, allowing for effortless lifting and rotating operations.

[0035] Figures 13 to 15 show modified examples of the hydraulic unit of the present invention. In the following description, components identical to those shown in the above embodiments are denoted by the same reference numerals, and detailed descriptions are omitted.

[0036] In this modified example, the shape of the rod-shaped body in the operating section of the main rope pole has been changed. The operating section 30 is a rod-shaped body with two bent sections between a straight base end 30a, which is the attachment point to the support column 20, and a straight tip end 30b, which is the handle. The shorter base end 30a is positioned coaxially with the axis C of the support column 20, and the tip end 30b is positioned parallel to the axis C, eccentrically offset by a length L from the axis of the support column 20. A straight intermediate section 30c is provided between the two bent sections, and this intermediate section 30c is inclined at 45° with respect to the axis C. As a result, the operating section 30 is positioned in the corner space S in both the first rotation direction (Figure 13(a)) and the second rotation direction (Figure 13(b)) of the support column 20. Furthermore, in this modified configuration, the same effects as when using the main rope pole 15 described above can be achieved. Moreover, in this modified configuration, a compact operating unit 30 can be realized that minimizes protrusion from the corner space S while maintaining the rotational operation function of the support column 20.

[0037] It should be noted that the present invention is not limited to the above-described embodiments, and the configuration of the corner member forming the corner space, the lifeline pole, and its support can be appropriately changed according to the specifications of the hydraulic unit. For example, the corner member can be made of various types of shaped steel (e.g., angle steel), but it may also be formed by bending a steel plate. Furthermore, the shape and arrangement of the various components that constitute the lifeline pole, such as the support column, locking part, and operating part, are arbitrary. In the embodiment, the support column and the operating part are bolted together for assembly purposes, but they may also be joined by welding. In addition, in the embodiment, the support is made of upper and lower independent members, but it may also be made of a single integrated member (e.g., pipe material). In that case, a pin or the like can be used as a means of fixing the support column at the protruding support position. [Explanation of symbols]

[0038] 11... Hydraulic unit, 12... Frame, 13... Cover body, 13a... Control panel, 13b... Connection part, 13c... Side wall, 13d... Ceiling, 13e... Hanging hole, 13f... Insertion opening, 14... Corner member, 14a... Wide inner surface, 14b... Narrow inner surface, 15... Lifeline pole, 16... Support part, 17... Lifeline pole, 18... Ladder, 19... Lifeline, 20... Support column, 21... Locking part, 21a... Large ring, 21b... Small ring, 22... Operation part, 22a... Base end, 22b…Tip, 22c…Middle part, 23…Upper flange, 23a…Cut surface, 24…Lower flange, 24a…One side, 24b…Other side, 25…Connecting part, 25a…Support column side member, 25b…Operating part side member, 26…Bolt, 27…Upper support part, 27a…Opening, 28…Lower support part, 28a…Opening, 28b…Lower flange mounting part, 28c…Stepped part, 29…Push bolt, 30…Operating part, 30a…Base end, 30b…Tip, 30c…Middle part

Claims

1. The mounting frame and A hydraulic power source device mounted on the frame, A rectangular parallelepiped cover body housing the hydraulic power source device, The cover body has four corner members that form a corner space extending vertically at each of its four corners, A hydraulic unit equipped with four lifeline poles positioned in each corner space, which can be operated from the ground, The hydraulic unit is characterized in that the corner member is provided with a support portion that supports the main rope pole in an embedded support position where it is embedded in the ceiling of the cover body and in a protruding support position where it is extended outwards.

2. The aforementioned main rope pole is A support column with a circular cross-section, A locking part is provided at the upper end of the support column, to which one end of the main rope is to be attached, The lower end of the support column is provided with an operating part for rotating the support column between a first rotation direction corresponding to the immersed support position and a second rotation direction corresponding to the protruding support position, The aforementioned support column is provided with an upper flange and a lower flange that are spaced apart in the vertical direction. The support portion consists of an upper support portion and a lower support portion that are spaced apart in the vertical direction, and each has an opening that opens in the vertical direction for inserting the main rope pole. The upper flange extends outwards from both sides of the outer circumference of the support column and is placed on the opening of the upper support portion at the recessed support position. The lower flange extends outwards from both sides of the outer circumference of the support column and is placed in the opening of the lower support portion at the protruding support position. The hydraulic unit according to claim 1, characterized in that the opening of the lower support portion has a lower flange mounting portion on which the lower flange is mounted, such that in a plan view the lower flange does not overlap with the lower flange in the first rotation direction of the support column, but overlaps with the lower flange in the second rotation direction.

3. The hydraulic unit according to claim 2, characterized in that the lower flange mounting portion is provided with a stepped portion that the lower flange contacts to restrict the rotation of the support column.

4. The hydraulic unit according to claim 2 or 3, wherein the operating part is a rod-shaped body having a bent portion between a straight base end which is attached to the support column and a straight tip end which is a handle portion, the base end is arranged coaxially with the axis of the support column, and the tip end is arranged parallel to a plane perpendicular to the axis of the support column.

5. The hydraulic unit according to claim 2 or 3, wherein the operating part is a rod-shaped body having a bent portion between a straight base end which is attached to the support column and a straight tip which is a handle portion, the base end is arranged coaxially with the axis of the support column, and the tip is arranged eccentrically with respect to the axis of the support column and parallel to the axis.

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