JPH07102757A - Bench functioning as trestle in combination - Google Patents

Abstract

PURPOSE:To obtain a bench functioning as a trestle in combination capable of being used properly for height operation by a method wherein a pair of leg sections are opened and installed onto a floor, etc., a scaffolding board section is projected to the outside, a bearing leg section is turned and disposed in upright and the scaffolding board section is held horizontally. CONSTITUTION:The upper end sections of a pair of leg sections 16, 16' are connected in a leg openable and closing-able manner through a first pivotal shaft 19, and baseplate sections 18, 18' brought to a horizontal state under the state of leg opening are installed at the upper end sections of the leg sections 16, 16'. A scaffolding board section 42 is connected to the external section of the baseplate section 18' in the trestle body 12 through a second pivotal shaft 44, and a section between a horizontal position adjacent to the baseplate section 18' and a folding position parallel with the leg section 16' can be rotated. A bearing leg section 43 is coupled with the scaffolding board section 42 through a third pivotal shaft 45, and a section between an upright position extended toward a rectangular lower section from the scaffolding board section 42 at a horizontal position and a folding position parallel with the scaffolding board section 42 is brought to a rotatable state. A pair of the leg sections 16, 16' are opened and mounted on a floor, etc., the scaffolding board section 42 is projected to the outside, and the bearing leg section 43 is turned and disposed in upright, and the scaffolding board section 42 is held in a horizontal attitude.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding-type work table that can be used as both a stepladder and a scaffold portion that is horizontally long.

[0002]

2. Description of the Related Art A conventional stepladder (1), as shown in FIG. 9, has a pair of legs (3) (3) which also serve as a ladder having base plates (2) (2) at the upper ends thereof. The butt ends of the side plates of the base plate portions (2) and (2) are rotatably connected to each other via a pivot shaft (4).

When the stepladder (1) is used, the legs (3) and (3) are opened around the pivot (4) and placed on the floor,
An operator climbs onto the base plate parts (2) and (2) by using the cross members (5) provided on the plurality of stages of the leg parts (3) and (3). ) Has a small area and has a bad foothold,
It is easy for workers to lose balance and it is difficult to work. Also, when painting a horizontally extending wall surface, etc., the work range becomes wider, so when working with only one stepladder,
The stepladder must be moved little by little, and every time the stepladder is moved, the work must be interrupted and the stepladder must be raised and lowered.

Therefore, conventionally, when the work range is wide,
As shown in 10, the two stepladders (1) are installed at a predetermined interval, and the base plate part (2) of the stepladders (1) (1) is installed.
A plate-shaped workbench (6) was bridged between (2) and the base plate parts (2) and (2), and the worker was working on the workbench (6) by climbing up.

[0005]

In order to allow a worker to work in a stable posture by using a conventional stepladder, two stepladders (1) and (1) and a workbench (6) are required. The number of components is large and the cost is high. Further, it takes time and effort to install the stepladder (1) (1) and the workbench (6), and especially when the work positions are sequentially moved, the stepladder (1) (1) is required.
Therefore, it takes a lot of labor and time to move and assemble the workbench (6), and as a result, there is a problem that the work cannot be carried out quickly and the work efficiency is lowered. Further, since the workbench (6) is simply laid across the base plate parts (2) and (2) of the stepladders (1) and (1), the workbench (6) may be inadvertently moved during the work. there were.

The present invention has been proposed in view of the above problems, and it is an object of the present invention to provide a step-and-stand workbench that is easy to move and improves work efficiency.

[0007]

In order to achieve the above object, the present invention has a pair of legs whose upper ends are connected to each other via a first pivot so that they can be opened and closed. A stepladder main body having a base plate part that is horizontal in an open leg state is attached to an upper end part, and is connected to an outer side part of the base plate part of the stepladder main body via a second pivot and is adjacent to the base plate part. A scaffolding plate that is rotatable between a horizontal position and a folding position that is parallel to the legs, and a scaffolding plate that is connected to the scaffolding plate via a third pivot, and is perpendicular to the scaffolding plate in the horizontal position. A position extending downwards,
The scaffolding plate portion and a folding position parallel to the scaffolding plate portion are configured to be rotatable with support legs.

The pair of leg portions of the stepladder body and the support legs of the workbench portion may be extendable.

[0009]

[Operation] When performing work using a stepladder, open the pair of legs of the stepladder main body and install them on the floor, etc., and extend the scaffolding plate outwards, and further rotate the support legs. The scaffold plate is supported in a horizontal position by standing upright.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a description of an embodiment of a work table for both stepladder according to the present invention, with reference to FIGS. 1 to 8.

As shown in FIGS. 1 to 4, a work table (11) for both stepladder according to the present invention comprises a stepladder main body (12) and a workbench portion (13).

The stepladder body (12) includes a pair of leg portions (16) (1
6 ') with one leg (16) in the shape of a ladder. The pair of legs (16) (16 ') are side columns (17) that can be expanded and contracted, respectively.
(17) and (17 ') (17') with rectangular base plate parts (18) (18 ') attached between the upper ends, respectively.
6) is a cross member (32) between the main members (21) of the side pillars (17) (17)
Are provided in multiple stages. Opposing butting ends of the base plate parts (18) and (18 ') are rotatably connected by a first pivot shaft (19), and side pillars (17) (17) and (1).
As shown in FIG. 2, 7 ') and 17') are the base plate parts (18) (1
From 8 ') it is flared toward the bottom.

Each side pillar of each leg (16) (16 ') is (17) (1
7), (17 '), and (17') are the main members (21) and (21 ') in the shape of rectangular tubes, and the elastic members (22) and (22') are slidably inserted into the main members (21) and (21 '). ) (21 ') on both outer walls at the lower end,
The first adjusting rods (23) (23 ') are held through, and the elastic members (22) (22') are attached to the first adjusting rods (2
3) A plurality of locking holes (24) (24 ') into which the (23') is removably inserted and locked are formed at a constant pitch in the longitudinal direction. Legs (16) (1) centered on the first pivot (19)
6 ') opening can be regulated, so legs (16) (16')
Both ends of a first center folding arm (25) capable of center folding upward are rotatably attached to side columns (17) and (17 ') facing each other in the opening and closing direction.

Further, the lower ends of the elastic members (22) and (22 ') of the side columns (17) (17) and (17') (17 ') of the respective leg portions (16) (16') are , And are connected by expandable and contractible connecting members (31) (31 '). Each of the above connecting materials (31) (31 ')
As shown in FIGS. 5 (a) and 5 (b), is a first member (33) having a U-shaped cross-section with an open upper surface, and a second member (34) slidably inserted into the first member (33). ) And the base end of each member (33) (34) corresponds to each leg (16).
The side pillars (17) and (17 ') of (16') are fixedly provided on the inner surfaces of the lower ends facing each other. A top plate (36) having a through hole (35) is fixedly provided between the tip upper end edge surfaces of the first member (33), and the through hole (36) is formed in the top wall of the tip of the second member (34). A long hole (37) extending in the longitudinal direction which overlaps with 35) is formed. First
The through hole (35) of the member (33) and the long hole (3 of the second member (34)
The adjustment bolt (39) having the end plate (38) attached to the lower end of the adjustment bolt (39) is penetrated from below, and the adjustment nut (40) is tightened to the upper end protruding portion of the adjustment bolt (39). ) And the second member (34) are fixed so that their lengths can be adjusted.

The workbench part (13) is composed of a scaffold plate part (42) and a support leg part (43) capable of expanding and contracting. The scaffold plate portion (42) has a rectangular shape, and the width dimension thereof is set to the same width dimension as the base plate portions (18) (18 ') of the stepladder main body (12). The butting ends of the scaffold plate part (42) and the base plate part (18 ') of the leg part (16') are rotatably connected via a second pivot shaft (44) to form a scaffold plate part. (42) to the base plate (1
It is possible to horizontally project outward from 8 ').

The supporting leg portion (43) is rotatably attached to the outer end of the scaffold plate portion (42) through a third pivot shaft (45). The support leg (43) is composed of side columns (46) (46) provided on both sides of the scaffolding plate (42), and each side column (46).
In (46), a stretchable member (48) is slidably inserted into a rectangular tubular main member (47), and the lower end portion of the stretchable member (48) is connected by a connecting member (49). A second adjusting rod (50) is held through the outer wall of the lower end of the main material (47) of the supporting leg (43), and the second wall is provided on the outer wall of the elastic material (48). Locking holes (51) into which the adjusting rods (50) are removably inserted and locked are formed at a constant pitch in the longitudinal direction.

Further, the base end portion of the second center folding arm (52) capable of being center-folded upward is provided on the inner surface of the main material (21 ') of the leg portion (16') of the stepladder main body (12) facing each other. Is rotatably pivotally attached. At the tip of the second middle folding arm (52),
As shown in FIG. 6, a hook portion (53) is formed, and this hook portion (53) is used as a main material (47) of the support leg portion (43).
Is engaged with and disengageably engaged with an engagement rod (54) attached to the lower part of the outer surface of the.

The stepladder (11) is provided with a locking means for preventing the stepladder body (12) and the workbench part (13) from opening without permission when the stepladder (11) is folded. That is, as shown in FIGS. 7 and 8, the first lock lever (62) provided with the hook portion (61) at the tip is pivoted at the lower end portion of the main material (21) of the one leg portion (16). The first lock in which the hook portion (61) of the first lock lever (62) is detachably engaged with the lower end portion of the main material (21 ') of the other leg portion (16') while being worn. Rod (6
3) is projected. Further, a second lock lever (65) having a hook portion (64) at its tip is pivotally attached to an intermediate portion of the main material (21 ') of the other leg portion (16'), and a work table portion ( The second lock lever (65) is provided at the bottom of the main material (47) of 13).
A second locking rod (66) is provided protruding from which the hook portion (64) of the hook is detachably engaged.

Next, an explanation will be given of how to handle the above-mentioned work table which is also used as a stepladder. The workbench part is assumed to be folded along the main body of the stepladder.

In the case of a simple work which does not require the workbench part (13), the first lock lever (62) is removed from the first lock rod (63) and, for example, the base plate of the stepladder main body (12). Department (1
8) Each leg (16) so that (18 ') is at the proper height
(16 ') side columns (17) (17) (17') (17 ') elastics (2
2) Adjusting the projecting length of (22 ') and inserting the first adjusting rods (23) (23') into the desired locking holes (24) (24 '), each elastic material After fixing (48) to the main material (47), the legs (16) and (16 ') are attached to the first middle folding arm (25).
Install it on the floor of the building by opening it until it becomes straight. In this case, the workbench part (13) is left folded along the other leg part (16 ') of the stepladder body (12).

When mounting an electric appliance on the ceiling of a building, etc., the base plate part (18) of the stepladder main body (12) is used.
Adjust the height of (18 ') in the same way as above. Further, the second lock lever (65) is disengaged from the second lock rod (66), and the scaffold plate part (42) of the workbench part (13) is attached to the second pivot (4).
4) through the side of the support leg (43)
By rotating the side posts (46) (46) outward with the third pivot (45) as a fulcrum to adjust the protruding length of the elastic material (48), and
After fixing each elastic material (48) to the main material (47) by inserting the second adjusting rod (50) into the desired locking hole (51),
Hold the support leg (43) in an upright position so that the upper surface of the scaffold plate (42) is flush with the base plate (18) (18 ') of the leg (16) (16'). Hold on. After that, the hook portion (53) at the tip of the second middle folding arm (52) is supported by the supporting leg portion (43).
The engaging rod (54) is detachably fitted and locked, and the second center bending arm (52) is linearly held to project and support the support leg (43). Then, the cross member (32) of one of the ladder-shaped leg portions (16) is used to go up to the scaffold plate portion (42) of the workbench portion (13) to perform a predetermined work. After using the stepladder (11), fold it in the reverse order of the above steps to hook the hook parts (61) (64) at the tips of the first and second lock levers (62) (65).
Is releasably locked to the first and second lock rods (63) (66), and the pair of legs (16) (16 ') and the workbench (1
3) prevent it from opening without permission.

[0022]

According to the present invention, since the workbench is foldably attached to the stepladder main body, when performing the work, after the stepladder main body is installed, the scaffold plate part of the workbench is set to the side. Only by overhanging, the installation work can be performed easily and easily, and the operator can go up to the overhanging scaffolding plate and perform a wide range of work. Moreover, since the scaffolding plate portion and the supporting leg portion can be folded along the main body of the stepladder,
It is compact and easy to carry. Therefore, when the working position is sequentially moved, the scaffolding plate part and the supporting leg part are folded, the step main body is lifted and carried to the next working position, which does not require a great labor and labor of the operator.
The stepladder can be moved easily and easily, work can be performed quickly, and work efficiency is improved. In addition, since the scaffolding board is integrally attached to the stepladder main body, the scaffolding board does not move during the work, which is safe.
Furthermore, for simple work that does not require a scaffolding board,
The scaffold plate and the supporting legs may be used while folded.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a work table for both stepladder according to the present invention.

FIG. 2 is a side view of the stepladder main body shown in FIG.

FIG. 3 is a side view of the workbench part shown in FIG.

FIG. 4 is a plan view of FIG.

5A is a plan view showing a connecting portion of a connecting member, FIG.
Is a cross-sectional view taken along line AA of (a).

FIG. 6 is an explanatory view showing a hooked state of a second middle folding arm and a locking rod.

FIG. 7 is a side view showing a state in which the stepladder / workbench is folded.

FIG. 8 is an explanatory view showing lock means for the stepladder main body and the workbench portion.

FIG. 9 is a side view of a conventional stepladder.

FIG. 10 is a side view showing a state in which a workbench is constructed using a conventional stepladder.

[Explanation of symbols]

 12 Stepladder 16, 16 'Leg 18, 18' Bed plate 19 First pivot 42 Scaffold plate 43 Support leg 44 Second pivot 45 Third pivot

Claims (2)

[Claims] 1. An upper end of a pair of legs is connected via a first pivot so that the legs can be opened and closed, and a base plate part that is horizontal in an open state is attached to the upper ends of the legs. Between the horizontal position adjacent to the base plate part and a folding position parallel to the leg part, which is connected to the outside part of the base plate part of the step ladder main body via a second pivot. A rotatable scaffolding plate, a position connected to the scaffolding plate via a third pivot, a position extending downward from the horizontal position of the scaffolding plate in a direction perpendicular to the scaffolding plate, and a folding position parallel to the scaffolding plate. A work table that can be used as both a stepladder and a supporting leg that is rotatable between and. 2. The workbench that can be used as both a stepladder according to claim 1, wherein the leg portion and the support leg portion are capable of expanding and contracting.