High working device

Abstract

To provide a high place work device with a leg end tool attached to an end of a ground side of an installation leg configuring a leg body.SOLUTION: In a high place work device with a leg end tool (8) attached to an end of a ground side of an installation leg (7), with regard to X1 direction toward a lifting side from a center of a leg body (3) and X2 direction toward the opposite side among X direction intersecting with a foot bar and Y1 direction toward the outside of the leg body from the prescribed center of the installation leg (7) and Y2 direction toward the inside of the leg body among Y direction along the foot bar, a leg end tool (8) comprises a plate-like outside flange (12) extending at least in Y1 direction from a seat part (10) of a lower surface of a cylindrical part (9) in which an end of the installation leg (7) is inserted, an outside insertion through hole (16) passing through in a vertical direction is drilled at a position adjacent to the end in X1 direction of the outside flange (12) and the seat part is fixed in a grounding state by driving a pile member (18).SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a working-at-height device, and more particularly to a working-at-height device in which a foot end fitting is attached to the end of an installation leg on the grounding side that constitutes a leg body.

Background Art

[0002] For example, working-at-height devices such as portable workbenches, step ladders, and ladders are provided with a working section for an operator to stand and perform working-at-height operations at the upper part of a ladder-shaped leg body having rungs for the operator to move up and down. Foot end fittings are attached to the ends of the left and right installation legs on the grounding side that constitute the leg body.

[0003] The working section for an operator to stand and perform working-at-height operations is constituted by a working top plate installed on a pair of leg bodies in the case of a portable workbench, and is constituted by the upper rung among the rungs provided in multiple stages on the leg body in the case of a step ladder or a ladder.

[0004] The installation legs that constitute the leg body are formed by cutting a profile made of a metal material such as aluminum by extrusion molding to a predetermined length, and a foot end fitting is attached to the end on the grounding side.

[0005] The foot end fitting is formed by a cylindrical body in the form of a shoe (boot form) integrally molded from a synthetic resin. By inserting the end of the installation leg, the end of the installation leg is protected and is placed on the ground.

[0006] In addition, when the leg body constitutes a telescopic leg, the inner leg is slidably inserted into the outer leg, and the foot end fitting is attached to the end on the grounding side of the inner leg as the installation leg.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0008] Conventionally, the foot end fitting is formed by a cylindrical body in the form of a shoe (boot form) that inserts and fixes the end of the installation leg, and the ground contact area of the bottom surface is limited to a small area. For this reason, even if the ground contact surface is formed with unevenness for anti-slip, it is likely to slide on the ground when an external force is applied. Also, when it comes into contact with soft ground, there is a problem of being buried in the ground.

[0009] Therefore, in order to increase the ground contact area, when molding the foot end fitting with synthetic resin, it is preferable to integrally form a plate-shaped flange that projects from the cylindrical portion into which the end of the installation leg is inserted to the periphery. However, a synthetic resin flange is easily damaged. For example, when the flange is grounded on the unevenness of the uneven ground and the installation leg receives a load such as the weight of an operator, the crushed flange may crack. Also, when transporting or moving the high-altitude work device, if the foot end fitting collides with a foreign object, the flange may be damaged.

[0010] An object of the present invention is to provide a high-altitude work device that solves the above-described problems with respect to the foot end fitting.

Means for Solving the Problems

[0011] Therefore, the present invention is configured as a means, in which a working section for an operator to stand and perform high-altitude work is provided at the upper part of a ladder-shaped leg provided with a tread on which the operator ascends and descends. In a high-altitude work device formed by attaching leg end fittings to the grounding-side ends of the left and right installation legs constituting the leg, in the X direction intersecting the tread, in the X1 direction from the center of the leg toward the ascending / descending side and the X2 direction opposite thereto, and in the Y direction along the tread, in the Y1 direction from the center of a predetermined installation leg toward the outside of the leg and the Y2 direction toward the inside of the leg, the leg end fitting integrally forms a cylindrical portion into which the end of the installation leg is inserted and a seating portion to be grounded to the ground. The seating portion is provided with a plate-shaped outer flange extending at least in the Y1 direction from the cylindrical portion. The outer flange is provided with an outer insertion hole penetrating vertically in the vicinity of the end in the X1 direction, and is configured to fix the seating portion in a grounded state by driving a pile member into the outer insertion hole.

[0012] Preferably, the leg end fitting is integrally formed of an elastic material, and a connecting wall connecting the edge in the X2 direction of the outer flange to the cylindrical portion is integrally formed.

[0013] Regarding the first axis direction Z1 from the vicinity of the end in the X1 direction of the outer flange toward the X2 direction and the Y2 direction, it is preferable that the outer insertion hole is formed by an elongated hole elongated in the first axis direction Z1.

[0014] In a preferred embodiment, the outer insertion hole forms an inclined hole in which the lower opening is displaced from the upper opening in the first axis direction Z1 with respect to the upper opening opening on the upper surface of the outer flange and the lower opening opening on the lower surface of the leg end fitting, and is configured such that the tip of the driven pile member is positioned below the cylindrical portion.

[0015] More preferably, the seating portion of the leg end fitting is provided with a plate-shaped inner flange extending in the Y2 direction from the cylindrical portion, an inner insertion hole penetrating vertically in the vicinity of the end in the X1 direction of the inner flange is opened, and the seating portion is configured to be fixed in a grounded state by driving a pile member into the inner insertion hole.

[0016] At this time, with respect to the second axis direction Z2 that extends from the vicinity of the end portion of the inner flange in the X1 direction toward the X2 direction and the Y1 direction, it is preferable that the inner insertion hole is formed by an elongated hole that is long in the second axis direction Z2.

[0017] Furthermore, with respect to the upper opening that opens on the upper surface of the inner flange and the lower opening that opens on the lower surface of the leg end fitting, the inner insertion hole forms an inclined hole in which the lower opening is displaced from the upper opening in the second axis direction Z2, and is preferably configured such that the tip of the driven pile member is positioned below the cylindrical portion.

Advantages of the Invention

[0018] According to the present invention, the installation legs 7 that constitute the legs 3 of the workbench 1 can be suitably installed in a state of being stably grounded on the ground by the leg end fittings 8.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying out the Invention

[0020] The representative embodiments of the present invention will be described in detail based on the following drawings.

[0021] (Telescopic Leg Device)

[0022] FIG. 1 and FIG. 2 show a portable workbench 1 (hereinafter simply referred to as "workbench 1") as an example of an aerial work device. The workbench 1 is provided with a working part for an operator to stand and perform aerial work on the upper part of a ladder-shaped leg body 3 having a multi-stage tread 2 for the operator to move up and down. Although not shown in the figure, the workbench 1 has a pair of leg bodies 3, 3 arranged opposite to each other, and the working part is constituted by a working top plate 4 installed on the leg bodies 3, 3. Therefore, the operator can move up and down between the ground and the working top plate 4 by using the tread 2 from the lifting side (the left side in the figure) of the leg body 3.

[0023] In the illustrated embodiment, the leg body 3 has telescopic legs configured by slidably inserting an inner leg 3b into an outer leg 3a, and the telescopic legs are arranged in a left and right inverted V shape. The outer leg 3a and the inner leg 3b are formed by cutting a profile made of a metal material such as aluminum by extrusion molding into a predetermined length.

[0024] As shown in FIG. 1, each telescopic leg is provided with a locking device 5 composed of a rack tooth and a locking claw that are detachably locked to the outer leg 3a to fix the inner leg 3b immovably in a state where the inner leg 3b is retracted into the outer leg 3a (retracted posture) and in a state where the inner leg 3b is extended from the outer leg 3a (extended posture) as shown in FIG. 2.

[0025] The leg 3 of the present invention is not necessarily limited to a telescopic leg. However, when it constitutes a telescopic leg as in the illustrated embodiment, a tread bar 2 is straddled between the outer legs 3a, 3a of the left and right telescopic legs. At this time, the lowermost tread bar 2a is fixed to the lower end portions of the outer legs 3a, 3a via brackets 6, and a locking device 5 is disposed facing the upper surface of the tread bar 2a.

[0026] Therefore, among the outer leg 3a and the inner leg 3b of the leg 3, the inner leg 3b constitutes an installation leg 7 that is grounded on the ground, and a leg end fitting 8 is attached to the grounded end thereof. It should be understood that the meaning of "ground" in "ground" and "grounded" used in this specification does not limit to land, but widely includes the object to be installed as the object on which the leg end fitting 8 of the installation leg 7 is placed.

[0027] Thus, in the workbench 1 of the illustrated embodiment, since the legs 3, 3 constitute telescopic legs, the lengths of the four installation legs 7 (inner legs 3b) can be freely set. Therefore, it is possible to install one leg 3 at a high place and the other leg 3 at a low place, which has the advantage of increasing the degree of freedom in selecting the ground on which the workbench 1 can be installed.

[0028] (Leg end fitting) Regarding the configuration of the leg end fitting 8, in the X direction intersecting the tread bar 2, the direction from the center of the leg 3 toward the lifting side is defined as the X1 direction, and the direction toward the lower side of the work top plate 4 on the opposite side is defined as the X2 direction. Further, in the Y direction parallel to the tread bar 2, the direction from the center of a predetermined installation leg 7 toward the outside of the leg 3 is defined as the Y1 direction, and the direction toward the inside of the leg 3 is defined as the Y2 direction, and will be described as follows.

[0029] As shown in FIGS. 3 and 4, the leg end fitting 8 is integrally formed of rubber (natural rubber or synthetic rubber) or other elastic materials, and integrally forms a cylindrical portion 9 into which the end portion of the installation leg 7 is inserted and a seat portion 10 that is grounded on the ground by forming the bottom portion of the cylindrical portion 9. The cylindrical portion 9 is fixed by a fixing tool 11 composed of a bolt and nut that penetrates in the transverse direction in a state where the end portion of the installation leg 7 is inserted.

[0030] The seat portion 10 integrally forms a plate-shaped outer flange 12 extending in the Y1 direction and a plate-shaped inner flange 13 extending in the Y2 direction so as to project from the cylindrical portion 9. The edges of both flanges 12 and 13 in the X2 direction are integrally connected to both side surfaces of the cylindrical portion 9 by connecting walls 14 and 15.

[0031] (Outer flange) The outer flange 12 is provided with an outer insertion hole 16 penetrating in the vertical direction in the vicinity of the end in the X1 direction. The upper opening 16a is opened on the upper surface of the outer flange 12, and the lower opening 16b is opened on the lower surface of the outer flange 12 or the lower surface of the seat portion 10. In the case of the illustrated embodiment, the lower opening 16b is opened across the lower surface of the outer flange 12 and the lower surface of the seat portion 10.

[0032] As shown in FIG. 4(B), with respect to the first axis direction Z1 from the position near the end in the X1 direction of the outer flange 12 toward the X2 direction and the Y2 direction, the outer insertion hole 16 is formed by a long hole extending long in the first axis direction Z1, and an inclined hole is formed by displacing the lower opening 16b from the upper opening 16a in the first axis direction Z1. That is, the outer insertion hole 16 forms an inclined hole opened in an inclined direction inclined on the first axis direction Z1, rather than a hole perpendicular to the outer flange 12.

[0033] (Inner flange) The inner flange 13 is provided with an inner insertion hole 17 penetrating in the vertical direction in the vicinity of the end in the X1 direction. The upper opening 17a is opened on the upper surface of the inner flange 13, and the lower opening 17b is opened on the lower surface of the inner flange 13 or the lower surface of the seat portion 10. In the case of the illustrated embodiment, the lower opening 17b is opened across the lower surface of the inner flange 13 and the lower surface of the seat portion 10.

[0034] As shown in Fig. 4(B), with respect to the second axis direction Z2 that extends from a position near the end of the inner flange 13 in the X1 direction toward the X2 direction and the Y1 direction, the inner insertion hole 17 is formed by a long hole that extends long in the second axis direction Z2, and forms an inclined hole in which the upper opening 17a is displaced from the lower opening 17b in the second axis direction Z2. That is, the inner insertion hole 17 does not form a hole perpendicular to the inner flange 13, but forms an inclined hole that is opened in an inclined direction that inclines on the second axis direction Z2.

[0035] (Pile member) When the workbench 1 is installed on the ground for performing work at height, the leg end tool 8 is fixed in the grounded state by driving an outer pile member 18 and an inner pile member 19 into the outer insertion hole 16 and the inner insertion hole 17 respectively (Figs. 5 and 6).

[0036] In the case of the illustrated embodiment, the pile members 18 and 19 are constituted by bolts or screws having a shaft portion 20a with an outer diameter to be inserted into the insertion holes 16 and 17 and a head portion 20b with a larger diameter than the insertion holes 16 and 17.

[0037] (Function) When the leg end tool 8 is grounded to perform work at height, the leg end tool 8 is grounded by a wide grounding area including the lower surface of the seat portion 10 and the lower surfaces of the outer flange 12 and the inner flange 13, so that it can be stably installed. At this time, the outer flange 12 and the inner flange 13 are integrally formed with the elastic material together with the whole of the leg end tool 8 and can be elastically deformed. Therefore, even when grounded on the unevenness, it deforms to fit the unevenness and ensures a good grounding state. Moreover, even when receiving a load due to the weight of the operator or the like from the installation leg 7, there is no risk of cracks or the like occurring. Further, even when being collided with foreign objects when the workbench 1 is being transported or moved, it will not be easily damaged.

[0038] The outer flange 12 and the inner flange 13 formed of an elastic material such as rubber are suitably deformed to fit the unevenness of the ground contact surface, but are integrally connected by the connecting walls 14, 14 formed between the edge in the X2 direction and the side surface of the cylindrical portion 9, and do not deform unnecessarily greatly, so early deterioration is prevented.

[0039] Then, with the leg end fitting 8 grounded, by driving the pile members 18, 19 into the outer insertion hole 16 and the inner insertion hole 17, the outer flange 12 and the inner flange 13 can be fixed in the grounded state.

[0040] Figs. 5 to 7 show the state when the leg end fitting 8 is grounded on the ground GL of the land. The inner leg 3b (installation leg 7) constituting the telescopic leg of the leg body 3 is in a stored posture stored in the outer leg 3a by being contracted.

[0041] Therefore, the pile members 18, 19 are driven in by an operator using a tool such as a hammer. At this time, the operator can take a posture facing the X1 direction on the lifting side, and can perform the driving operation toward the outer flange 12 and the inner flange 13 with the upper side open in the X1 direction, so the work is easy. In other words, it is difficult for the operator to extend his hand in the X2 direction below the work top plate 4 to perform the driving operation, but such difficulty does not occur.

[0042] By the way, when the inner leg 3b (installation leg 7) of the telescopic leg is in the stored posture, as shown in the figure, the leg end fitting 8 is brought close to the bracket 6 of the lowermost tread bar 2a. However, even in this state, since the upper space of the outer flange 12 is open, the driving operation of the pile member 18 into the outer insertion hole 16 is facilitated.

[0043] On the other hand, since the upper space of the inner flange 13 is blocked by the lowermost tread bar 2a, the driving operation of the pile member is not easy to that extent. However, as described above, since the inner insertion hole 17 is formed as an inclined hole inclined above in the second axial direction Z2, it is possible to lift a hammer or the like for striking the pile member 19 in a direction where the tread bar 2a does not interfere, enabling the pile driving operation without difficulty.

[0044] Since the outer insertion hole 16 and the inner insertion hole 17 constitute the inclined holes described above, the pile members 18 and 19 are driven in an inclined posture such that the tips are positioned below the cylindrical portion 9 as shown in FIGS. 5 and 6. For this reason, the resistance of the pile members 18 and 19 acts strongly against the upward pulling force of the leg end fitting 8. During driving, since both insertion holes 16 and 17 form long holes, the pile members 18 and 19 can be driven in a state where they are not necessarily restricted by the inclination angle of the inclined holes, that is, in a state where a clearance is provided for the inclination angle, facilitating the driving operation.

[0045] The above has described the case of driving the pile members 18 and 19 into the leg end fitting 8 with the inner leg 3b (installation leg 7) of the retractable leg in the retracted posture. Needless to say, the pile members 18 and 19 may be driven into the leg end fitting 8 with the inner leg 3b (installation leg 7) of the retractable leg in the extended posture.

[0046] In this way, the installation leg 7 of the leg body 3 on the workbench 1 is stably installed because the leg end fitting 8 is fixed in the grounded state, ensuring the safety of the operator's work at heights.

[0047] At this time, since the leg body 3 is configured such that the telescopic legs composed of the left and right outer legs 3a and the inner legs 3b are arranged in a V shape, if the leg end fitting 8 is fixed in the grounded state with the inner legs 3b, 3b in the extended posture, even if the locking device 5 is released from the locked state due to malfunction or the like, there is an advantage that the outer legs 3a, 3a will not descend.

[0048] The above has described the case where the grounding state of the leg end fitting 8 is fixed by driving the pile members 18 and 19 into the ground surface. However, as shown in FIG. 8, it is also possible to configure such that an auxiliary plate 21 such as a wooden board is attached and fixed to the lower surface of the leg end fitting 8 by the pile members 18 and 19, and the auxiliary plate 21 is installed on the ground.

[0049] In this case, the pile members 18 and 19 are constituted by screws or the like provided with screws on the shaft portion 20a, and are driven in by driving and rotating the head portion 20a with a tool such as a driver.

[0050] When the workbench 1 is installed on soft ground or the like, the auxiliary plate 21 prevents sinking, and it becomes possible to install the workbench in a desired posture.

Explanation of Reference Numerals

[0051] 1 Workbench 2 Cross member 2a Lowermost cross member 3 Leg body 3a Outer leg 3b Inner leg 4 Work top 5 Locking device 6 Bracket 7 Installation leg 8 Leg end fitting 9 Cylindrical portion 10 Seat portion 11 Fastening tool 12 Outer flange 13 Inner flange 14, 15 Connecting wall 16 Outer insertion hole 16a Upper opening 16b Lower opening 17 Inner insertion hole 17a Upper opening 17b Lower opening 18, 19 Pile member 20a Shaft portion 20b Head portion 21 Auxiliary plate

Claims

1. A working section for an operator to stand and perform high-altitude work is provided at the upper part of a ladder-shaped leg body having treads for the operator to move up and down. In a high-altitude work device formed by attaching leg end fittings (8) to the grounding-side ends of the left and right installation legs (7) constituting the leg body (3), Regarding the X1 direction from the center of the leg body (3) toward the lifting side and the X2 direction toward the opposite side among the X directions intersecting the treads, and the Y1 direction from the center of a predetermined installation leg (7) toward the outside of the leg body and the Y2 direction toward the inside of the leg body among the Y directions along the treads, The leg end fitting (8) is integrally formed of an elastic material, and a cylindrical portion (9) for inserting the end of the installation leg (7) and a seat portion (10) to be grounded on the ground are integrally formed. The seat portion includes a plate-shaped outer flange (12) extending at least in the Y1 direction from the cylindrical portion, and a connecting wall (14) connecting the X2-direction edge of the outer flange (12) to the cylindrical portion (9) is integrally formed, The outer flange (12) is provided with an outer insertion hole (16) penetrating vertically in the vicinity of the end in the X1 direction, and the seat portion is configured to be fixed in a grounded state by driving a pile member (18) into the outer insertion hole. A high-altitude work device characterized by this.

2. Regarding the first axis direction Z1 from the vicinity of the end in the X1 direction of the outer flange (12) toward the X2 direction and the Y2 direction, the outer insertion hole (16) is formed by an elongated hole elongated in the first axis direction Z1. The high-altitude work device according to Claim 1, characterized by this.

3. Regarding the upper opening (16a) opening on the upper surface of the outer flange and the lower opening (16b) opening on the lower surface of the leg end fitting, the outer insertion hole (16) forms an inclined hole with the lower opening displaced from the upper opening in the first axis direction Z1, and the tip of the driven pile member (18) is configured to be located below the cylindrical portion (9). The high-altitude work device according to Claim 2, characterized by this.

4. The seat portion of the leg end fitting (8) includes a plate-shaped inner flange (13) extending in the Y2 direction from the cylindrical portion, and an inner insertion hole (17) penetrating vertically in the vicinity of the end in the X1 direction of the inner flange is provided. The seat portion is configured to be fixed in a grounded state by driving a pile member (19) into the inner insertion hole. The high-altitude work device according to Claim 1, 2, or 3, characterized by this.

5. The high-altitude work device according to claim 4, wherein the inner insertion hole (17) is formed by a long hole that is long in the second axis direction Z2 extending from a position near the end of the inner flange (13) in the X1 direction toward the X2 direction and the Y1 direction.

6. The high-altitude work device according to claim 5, wherein the inner insertion hole (17) forms an inclined hole in which the lower opening (17b) opening on the lower surface of the leg end fitting is displaced from the upper opening (17a) opening on the upper surface of the inner flange in the second axis direction Z2, and is configured such that the tip of the driven pile member is positioned below the cylindrical portion.

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