JPH10266552A - Work platform - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an aerial work platform that is compact and lightweight, and is easy to move and store. SOLUTION: A gate-shaped base 2 viewed from the front, a detachable scaffold plate 3 disposed between left and right leg members 6 of the base 2, and a scaffold plate
3 and a detachable handrail 4 disposed at the front and rear edges of the handrail. The front and rear cross members 7 of the base 2 are composed of a left cross member 14 and a right cross member 15 which can be folded so that the upper portions thereof are opposed to each other, and a left end portion and a right cross member 15 of the left cross member 14 are formed. Right end is left and right leg members
6 are rotatably attached to the upper end.
The scaffold plate 3 is composed of a left scaffold plate 20 and a right scaffold plate 21 that can be folded so that the lower portions thereof face each other. One end of the scaffold plate reinforcing brace 13 is rotatably attached to the scaffold plate 3, and a hook portion 31 is provided at the other end of the brace 13, and the hook portion 31 is hooked to the left and right leg members 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerial work platform used for indoor aerial work.

[0002]

2. Description of the Related Art An aerial work platform used for indoor aerial work is required to be able to perform work such as mounting electric appliances on a ceiling without moving a desk or chair. Conventionally, as a work table, a first base, a second base,
A first telescopic support erected on the first base, a second telescopic support erected on the second base, and a bendable / extendable elevating link for connecting the first telescopic support and the second telescopic support. Floor and
It is known that each column is expanded / contracted and the floor is bent / extended by a hydraulic cylinder.
No. 96324).

[0003]

The above-mentioned conventional work platform requires a plurality of hydraulic cylinders, so that the work platform is inevitably large and heavy, and cannot be disassembled. There was a problem that it was inconvenient to move and store.

An object of the present invention is to provide an aerial work platform which is compact and lightweight, and which can be easily moved and stored.

[0005]

An aerial work platform according to the present invention has a pair of left and right leg members having a predetermined front and rear width and a pair of front and rear cross members for connecting upper end portions of the left and right leg members. A gate-shaped base, at least one detachable scaffold plate arranged between the left and right leg members, and detachable handrails arranged at front and rear edges of the scaffold plate, wherein the cross members are connected to each other Consists of a left cross member and a right cross member that can be folded so that they face each other, and the left end of the left cross member and the right end of the right cross member are rotatably attached to the upper ends of the left and right leg members, respectively. The scaffold plate is composed of a left scaffold plate and a right scaffold plate that can be folded so that the lower portions face each other.

According to the aerial work platform of the present invention, the handrail and the scaffold can be removed from the base as needed. In addition, the base can be folded at the left and right central portions, and the scaffold can also be folded. Accordingly, since the work platform can be moved and stored after being disassembled and compacted, the work platform can be easily moved, and the area and volume required for storage can be extremely small. Also, in order to assemble the aerial work platform once disassembled, it is only necessary to extend the base and the scaffolding plate, pass the scaffolding plate between the horizontal members of the front leg members, and attach the handrail. Easy to assemble work platforms.

One end of the brace for reinforcing the scaffold plate is rotatably attached to the scaffold plate, a hook portion is provided at the other end of the brace, and hook hook portions for hooking the hook portions are provided on the left and right leg members. Preferably. In this way, the scaffold plate is reinforced only by hooking the hook portion of the scaffold plate reinforcing brace on the hook hooking portion, and the number of parts when disassembled does not increase.

Further, projections are provided on both front and rear surfaces near the left and right ends of the front and rear cross members, respectively. At the front edge of the leg member, an opening stop which is hung on the projection on the other front or rear surface near the right end of the front cross member is provided at the front edge of the right leg member, near the left end of the rear cross member. An open stop that is hooked on the protrusion on one of the front and rear surfaces is provided on the rear edge of the left leg member, and an open stop that is hooked on the protrusion on the other front or rear surface near the right end of the rear cross member. It is preferable that each of the right leg members is swingably provided at a rear edge portion thereof. By doing so, when the base is extended from the folded state, each opening stopper can be hooked on the corresponding projection to prevent the base from being folded, so that subsequent assembly work becomes easier, and When the base is folded, hook the left leg member on the protrusion near the right end of the horizontal member, and hook the right leg member on the protrusion near the left end of the horizontal member. Extension can be prevented, so that the base can be easily moved and stored thereafter.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In this specification, front and rear, left and right refer to FIG. 1, the front refers to the front side of the paper of FIG. 1, the rear refers to the back side of the paper, and the left and right refer to the rear.

The aerial work platform (1) of the present invention is of an assembling type, and as shown in FIGS. 1 to 7, a pair of left and right leg members (6) and upper ends of the left and right leg members (6). A gate-shaped base (2) viewed from the front having front and rear cross members (7) connecting the parts,
Front and rear and center scaffolding plates (3) detachably attached between the left and right leg members (6), front and rear handrails (4) detachably attached to the front and rear scaffolding plates (3), and front and rear handrails (4 And left and right handrails (5) removably attached to the left and right handrails.

The leg member (6) is composed of a pair of front and rear vertical members (8) and an end cross member (9) held between upper ends of the front and rear vertical members (8). Three steps (11) are bridged between the front and rear longitudinal members (8). Casters (10) at the lower ends of front and rear vertical members (8)
The aerial work platform (1) is movable in the front-rear and left-right directions.

A brace (13) for reinforcing the scaffold plate is obliquely provided between the second step (11) from the bottom and near the left and right ends of the scaffold plate (3).

The leg member (6), the step (11) and the brace (1)
3) is a seamless aluminum pipe with a round cross section, which includes front and rear cross members (7), scaffolding plates (3), front and rear handrails (4), and left and right handrails.
(5) is made of extruded aluminum material.

As shown in FIG. 1, between the left and right leg members (6), a space necessary for mounting the aerial work platform (1) over a desk or the like installed on the floor is secured. ing.

The front and rear cross members (7) are composed of a left cross member (14) and a right cross member (15) rotatably connected to each other. The left end of the left cross member (14) is at the upper end of the vertical member (8) of the left leg member (6), and the right end of the right cross member (15) is the vertical member of the right leg member (6).
(8) are rotatably attached to upper end portions thereof through protruding joints (16).

The right end of the left cross member (14) and the right cross member (15)
The connecting fittings (17) and (18) are fixed to the left end of the. These connecting brackets (17) and (18) have upper connecting protruding portions (17a) and (18a) which are located above the left lateral member (14) and the right lateral member (15) and overlap with each other. The upper protruding portions (17a) (18a) are rotatably connected to each other by pins (19). The front and rear cross members (7) can be folded until the upper parts are opposed to each other.
The character-shaped bent state is prevented by abutting the right end face of the left horizontal member (14) and the left end face of the right horizontal member (15).

Since the front and rear cross members (7) are configured as described above, when the left and right leg members (6) are moved closer to each other, the front and rear cross members (7) are bent at the left and right central portions. At the same time, the base (2) is folded by rotating both ends thereof with respect to the leg member (6). This state is shown in FIG.

Between the vicinity of the upper end of the front and rear vertical member (8) of the leg member (6) and the vicinity of the left and right end of the front and rear cross member (7), an opening stopper (7) for preventing the front and rear cross members (7) from being folded ( 12) are provided respectively. One end of the opening stopper (12) is swingably supported near the upper end of the vertical member (8) of the leg member (6). Closure (12)
A hook portion (27) is provided at the other end of the hook portion (27).
Are hooked on projections (28) provided on the front and rear cross members (7). The left and right front stopper (12) is the left and right longitudinal member
At the front of (8), the right front and rear opening stoppers (12) are attached to the rear of the right front and rear vertical members (8), respectively.
8) are provided on both front and rear surfaces of the front and rear cross members (7). Therefore, as shown in FIG. 8, when the base (2) is folded, the front left and right opening stoppers (12) are hooked on the front projections (28) near the right end of the front and rear cross members (7), and Clasp (1
The base (2) can be prevented from being extended by hooking the (2) on the protrusion (28) on the rear surface near the left end of the front and rear crosspiece (7).

The scaffold plate (3) comprises a left scaffold plate (20) and a right scaffold plate (21) rotatably connected to each other. At the left end of the left scaffold plate (20) and at the right end of the right scaffold plate (21), a hook portion (22) formed in a vertical cross section C is provided, and this hook portion (22) is End cross member of leg member (6) (9)
Is detachably fitted from above. Hook part (22)
Is provided with a stopper (23) for preventing the hook portion (22) from coming off the end cross member (9). Stopper (23)
Is always urged in a direction to narrow the opening of the hook portion (22). Hold down the stopper (23) by hand,
Is retracted, the opening of the hook (22) expands, and the hook (2
2) can be removed from the end cross member (9).

The right end of the left scaffolding plate (20) and the right scaffolding plate
Connection fittings (24) and (25) are fixed to the left end of (21), respectively. These connecting brackets (24) and (25) are connected to the left scaffold plate (2
0) and the right lower scaffolding plate (21), and have lower connecting protruding portions (24a) (25a) that are superimposed on each other, and the lower protruding portions (24a) (25a) are 26) so that they are rotatably connected to each other. This makes the scaffold plate (3)
Is foldable at the left and right central portions. Scaffold board
The folding of (3) is possible until the lower parts are opposed to each other, and it is possible to change from the horizontal state to the V-shaped bent state by changing the right end face of the left scaffold plate (20) and the right scaffold plate. This is prevented by abutment with the left end face of (21).

A brace mounting plate (30) is mounted at one-third of the left and right ends of the scaffold plate (3). One end of the brace (13) is rotatably mounted on the brace mounting plate (30). The other end of the brace (13) is provided with a hook (31) with a stopper (32) having the same configuration as that provided at the end of the scaffold plate (3). The second step from the bottom (11)
Is a hook hooking portion, and a hook portion (31) with a stopper (32) is hooked on the step (11) from below.
The pins (26) for connecting the connecting fittings (24) and (25) are positioned below the lower surface of the scaffold plate (3) by an amount corresponding to the thickness of the brace (13).

At the front edge of the front scaffold plate (3) and at the rear edge of the rear scaffold plate (3), a bottomed cylindrical handrail receiving portion that receives the lower ends of the front and rear handrails (4). (29) is provided.

The front and rear handrails (4) are round U-shaped pipes.
It is formed in the shape of a letter, and is arranged in pairs of right and left. A skirting board (33) is welded between the lower ends of the front and rear handrails (4). The lower ends of the front and rear handrails (4) are detachably fitted into handrail receiving portions (29) of the scaffold plate (3). Left and right handrail
(5) is formed by a pipe having a round cross section being interposed between the front and rear handrails (4). Clamp joints (37) are fixed to the front and rear ends of the left and right handrails (5) .The clamp joints (37) are fitted over the vertical parts of the front and rear handrails (4), and the left and right handrails are tightened. Handrails (5) are front and rear handrails
(4) It is detachably attached to.

The caster (10) has a brake (34) and can be locked by depressing a pedal (34a). On the upper surface of the caster (10), there is provided a telescopic tube (35) which is an extension of the front and rear vertical members (8).
(8) is slidably fitted into the lower end of
By being fixed by (36), the height of the workbench (1) can be adjusted by the length of the telescopic tube (35).

FIG. 9 to FIG.
The process of assembling (1) is shown. Work platform
To assemble (1), the base folded in the state of FIG.
(2) The distance between the left and right leg members (6) is increased.
Then, the front and rear cross members (7) folded at the left and right central portions are extended and become horizontal (see FIG. 9). Next, an opening stopper (12) for preventing the base (2) from being folded is provided. This facilitates subsequent work. Then, the scaffold plate (3) is extended, and the hook portions (22) at the left and right ends of the scaffold plate (3) are attached to the end cross members (9) of the base (2) (see FIG. 10). The connecting brackets (24), (25) and the connecting pin (26) are positioned below the lower surface of the scaffold plate (3) by an amount corresponding to the thickness of the brace (13). In the scaffold plate (3) in the unfolded state, the brace (13) is sandwiched between the left scaffold plate (20) and the right scaffold plate (21) (see a chain line portion in FIG. 10). Then brace (1
3) is rotated to hook the hook portion (31) to the step (11). Finally, attach the front and rear handrails (4) and the left and right handrails (5).

When it is necessary to securely fix the work platform (1) to the floor, after locking the casters (10), furthermore, outriggers (external supports) are provided before and after the work platform (1).
(40) may be attached. Outrigger (40)
Consists of a seamless aluminum pipe with a round cross section.
As shown in Fig. 2, one end is fixed to the floor, the other end is fixed near the upper end of the front and rear vertical members (8) of the left and right leg members (6), and one end is A short material (42) fixed near the floor-side end of the long material (41) and the other end fixed near the lower end of the front and rear vertical members (8) of the left and right leg members (6). Is done.

As shown in detail in FIGS. 13 and 14, the long material (41) is composed of an outer pipe (43) and a length adjusting inner pipe (slidably inserted into the outer pipe (43)). 44).
A hole (48) that penetrates radially near the lower end of the outer pipe (43)
A C-shaped retaining ring (45) is fitted over the position corresponding to the hole. Both ends of the retaining ring (45) are connected by a spring (46), and the retaining ring (45) is locked to the outer pipe (43) by the urging force of the spring (46). The inner pipe (44) is provided with a plurality of holes (49) penetrating in the radial direction at predetermined intervals in the longitudinal direction. Then, the length of the long member (41) is adjusted by inserting and removing the inner pipe (44) with respect to the outer pipe (49) by a predetermined length, and the pin (47) attached to the retaining ring (45) is removed. By inserting the inner pipe (44) into the through holes (48) and (49) of the inner pipe (44), the inner pipe (44) can be fixed to the outer pipe (43).

[Brief description of the drawings]

FIG. 1 is a side view showing an aerial work platform according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is an enlarged view of a caster portion.

FIG. 5 is a sectional view taken along the line VV of FIG. 3;

FIG. 6 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 7 is a sectional view taken along the line IIV-IIV in FIG. 3;

FIG. 8 is a side view showing a folded state of the base.

FIG. 9 is a side view showing a first step of assembling the aerial work platform;

FIG. 10 is a side view showing a second step in the process of assembling the aerial work platform.

FIG. 11 is a side view showing a third step of assembling the aerial work platform;

FIG. 12 is a front view when the aerial work platform is fixed to the floor.

FIG. 13 is a partially enlarged view showing details of an outrigger of FIG. 12;

14 is a sectional view taken along the line XIV-XIV in FIG.

[Explanation of symbols]

 (1) Aerial work platform (2) Base (3) Scaffolding plate (4) Front and rear handrails (6) Left and right leg members (7) Front and rear cross members (12) Non-opening (13) Brace (14) Left cross member (15) Right cross member (20) Left scaffold plate (21) Right scaffold plate (28) Projection (31) Hook

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kenichi Okada 4-83, Shibaura, Minato-ku, Tokyo Kandenko Co., Ltd. (72) Shinji Takahashi 4-83, 33, Shibaura, Minato-ku, Tokyo Inside Kandenko (72) Kunio Muko, Inventor 7-23-4 Ebie, Fukushima-ku, Osaka City Inside Hasegawa Kogyo Co., Ltd. Inside

Claims (3)

[Claims] 1. A pair of left and right leg members having a predetermined front-rear width.
(6) and a gate-shaped base (2) viewed from the front having a pair of front and rear cross members (7) connecting the upper ends of the left and right leg members (6),
At least one detachable scaffold plate (3) disposed between the left and right leg members (6), and detachable handrails (4) disposed on the front and rear edges of the scaffold plate (3). (7) is composed of a left cross member (14) and a right cross member (15) that can be folded so that the upper portions are opposed to each other, and the left end and the right cross member of the left cross member (14) The right end of (15) is rotatably attached to the upper ends of the left and right leg members (6), respectively, and the scaffold plate (3) can be folded so that the lower parts face each other. And right scaffolding board (21)
Work platform consisting of: 2. One end of a brace (13) for reinforcing a scaffold plate is rotatably attached to the scaffold plate (3).
The workbench according to claim 1, wherein a hook portion (31) is provided at the other end, and a hook hooking portion (11) for hooking the hook portion (31) is provided on the left and right leg members (6). 3. The front and rear cross members (7) are provided with projections (28) on both front and rear surfaces near the left and right ends of the front and rear cross members (7).
An opening stopper (12), which is hooked on the protrusion (28) on one of the front and rear surfaces near the left end, is attached to the front edge of the left leg member (6), near the right end of the front cross member (7). An opening stopper (12), which is hooked on the protrusion (28) on the other front or rear surface, is provided on the front edge of the right leg member (6) and one of the front and rear near the left end of the rear cross member (7). An opening stopper (12) which is hooked on the projection (28) on the surface of the left leg member (6) is attached to the rear edge of the left side member (6) near the right end of the rear cross member (7). 2. A workbench according to claim 1, wherein the opening stoppers (12) hooked to the (28) are swingably provided on the rear edges of the right leg member (6).