JPH11343731A - Expandable scaffolding board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an expandable scaffolding board of which the length can be changed continuously. SOLUTION: An expandable scaffolding board 2 comprises a first component 4, a second component 5 to which the first component is fitted in longitudinal direction in a freely movable manner, and a lock 6 which blocks the movement of the first component 4 to the second component 5 in longitudinal direction. The lock device 6 comprises a rack 11 provided in the first component 4, a stopper 12 supported by the second component 5 and interlocking with the rack 11, and a torsion coil spring 17 for exerting the stopper to 12 to a direction interlocking with the rack 11. Stopper 12 comprises an upright handle portion 13, a rack linking portion 14 arranged near the apex of the handle portion 13, a pair of right and left horizontal shaft supporting portion 15 provided at the bottom portion of the handle portion 13 and a horizontal shaft 16 crossing between the right and left shaft supporting portion 15 and fitted in a guide groove 23 provided at the second component 5 in a freely movable manner in width direction and is made freely rotatable around the axis line of a horizontal shaft 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic scaffold plate that is telescopic and locked when it has a required length.

[0002]

2. Description of the Related Art Conventionally, as a telescopic scaffold plate which is telescopic and locked when it has a required length, a rectangular plate-shaped first scaffold plate member is moved longitudinally into a hollow second scaffold plate member. The first scaffold plate component is freely fitted, and pin insertion holes are provided on one side surface of the first scaffold plate component at a predetermined interval (for example, 20 cm interval), and a pin penetrating the second scaffold plate component is inserted into this pin insertion hole. It is known that the fitting of the first scaffold plate component prevents the first scaffold component from moving in the longitudinal direction with respect to the second scaffold component.

[0003]

In the above-mentioned conventional telescopic scaffold plate, the pin insertion holes must be densely provided in order to continuously change the length. However, providing the pin insertion holes densely requires strength. There is a problem in that it is difficult to change the length continuously because of its limitations.

It is an object of the present invention to provide a telescopic scaffold plate whose length can be easily changed continuously.

[0005]

The telescopic scaffold plate according to the present invention comprises a first scaffold plate component, a second scaffold plate component in which it is movably fitted in the longitudinal direction, and a first scaffold plate component. In a telescopic scaffold plate comprising a lock device for preventing a longitudinal movement of a scaffold plate component member with respect to a second scaffold plate component, a lock provided on the first scaffold plate component, and a second scaffold. It is characterized by comprising a stopper supported by the plate component and meshing with the rack, and an elastic member biasing the stopper in a direction meshing with the rack.

According to the telescopic scaffold plate of the present invention, the length of the telescopic scaffold plate can be changed by one pitch of the rack, so that the length can be adjusted substantially continuously.

The stopper has a vertical handle, a rack engaging portion provided near the top of the handle, and a guide groove provided on the bottom of the handle and provided on the second scaffold plate component. A horizontal axis fitted movably in the direction and rotatable about the axis of the horizontal axis, and the elastic member biases the stopper in a direction in which the top of the stopper moves inward. It is preferable to use a torsion coil spring.

According to such a stretchable scaffold plate, the grip portion of the stopper is disengaged from the rack by grasping the grip portion of the stopper and rotating the stopper top outward against the torsion coil spring. Further, after the stopper is rotated until the grip portion of the stopper is in a horizontal state, the stopper is moved inward in the width direction, so that the torsion coil spring urges the stopper upward and the rotation of the stopper is stopped. An unlocked state blocked by the two scaffold plate components is obtained. Therefore, the length of the telescopic scaffold can be adjusted by releasing the hand from the stopper.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the left and right in FIG. 3 are referred to as left and right, and the front side of the drawing is referred to as front, and the back side is referred to as rear.

FIG. 1 shows an embodiment in which the telescopic scaffold plate of the present invention is provided on a work table called a horse.
(1) is composed of a telescopic scaffold plate (2) that is telescopic and locked at a required length, and foldable telescopic legs (3) provided at both front and rear ends of the telescopic scaffold plate (2). Become.

The extensible scaffold plate (2) is composed of a first scaffold plate component (4) made of extruded aluminum material and a first extruded aluminum member made of extruded aluminum material in which it is movably fitted in the longitudinal direction (left-right direction). It comprises a two scaffold plate component (5) and a locking device (6) for preventing the first scaffold plate component (4) from moving in the left-right direction with respect to the second scaffold plate component (5).

As shown in detail in FIGS. 2 to 5, the locking device (6) comprises a left-right rack (11) provided on the front surface of the first scaffold plate component (4) and a second rack (11). A stopper (12) supported by the scaffold plate component (5) so as to be movable in the width direction (front-rear direction) and rotatable about an axis in the left-right direction and engaged with the rack (11), and a stopper (12).
It comprises a torsion coil spring (17) as an elastic member biased in a direction to mesh with (11).

The first scaffold plate component (4) has a substantially U-shaped cross section which is open downward and has a front wall (4a) provided with an internal enlarged groove (7) which is open forward. . Rack (11)
Is formed in a plate shape with a large number of teeth provided at predetermined intervals on the front surface, and is fitted and fixed in the internal enlarged groove (7) of the first scaffold plate component (4). A reinforcing plate extending in the width direction is provided on the lower surface of the right end of the first scaffold plate component (4).
(8) is fixed.

The second scaffold plate component (5) has a substantially U-shaped cross section opened downward and has a stopper formed on its front wall (5a).
A rectangular through hole (9) through which (12) is inserted is provided.
A reinforcing plate (10) extending in the width direction is fixed to the upper surface of the left end of the second scaffold plate component (5).

The stopper (12) is made of an aluminum alloy die-cast, and is provided with a substantially triangular plate-shaped handle (13) whose width becomes narrower as it goes upward and a rearward protruding shape near the top of the handle (13). Rack engaging portion (14), a pair of left and right horizontal shaft support portions (15) opposed to each other and provided on the bottom of the handle portion (13) so as to protrude rearward, and left and right horizontal shaft support portions (15). Consists of the horizontal axis (16) passed in between.

The second scaffold plate component (5) has a stopper (1
A support (18) for supporting 2) is fixed. Support bracket
(18) comprises a horizontal portion (19) extending in the width direction and rising portions (20) provided at both front and rear ends thereof. The front end of the horizontal section (19) has a higher upper horizontal wall (2
1) and a lower horizontal wall (22) lower than the same. Between these horizontal walls (21) and (22) is a guide groove (23) in which the horizontal shaft (16) of the stopper (12) is movably fitted in the width direction. On the upper surface of the rear end of the upper horizontal wall (21), the inwardly projecting edge of the front wall (5a) of the second scaffold plate component (5)
A ridge (24) abutting on (5b) is provided, and an inclined portion (25) is provided between the lower horizontal wall (22) and a portion behind the lower horizontal wall (22).
Is provided.

Four teeth (14a) meshing with the rack (11) are provided on the rear surface of the rack engaging portion (14) of the stopper (12), and the rack engaging portion (14) is connected to the second scaffold. The teeth (14a) are inserted into the through holes (9) of the front wall (5a) of the plate component (5) and engage with the rack (11) provided on the front surface of the first scaffold plate component (4). Thereby, the left-right movement of the first scaffold plate component (4) with respect to the second scaffold plate component (5) is prevented.

The left and right horizontal shaft support portions (15) of the stopper (12) are provided with holes (15a) penetrating it left and right.
Then, the shaft of the horizontal shaft with head (16) inserted through the through hole (15a) on the left is loosely fitted into the guide groove (23) of the support bracket (18), and the tip of the horizontal shaft (16) is Is inserted through the right through-hole (15a), and the E-ring
(26) is inserted. This allows the stopper (12)
Are supported by a second scaffold plate component (5) via a support bracket (18) so as to be movable in the front-rear direction and rotatable about the horizontal axis of the horizontal shaft (16).

On the left and right sides of the handle (13) of the stopper (12), arc-shaped left and right recesses (13a) having irregularities on the bottom surface are provided. By sandwiching between the thumb and the index finger, the stopper (12) can be moved in a required direction.

One end of the torsion coil spring (17) is a horizontal shaft.
It is wound around the left end of (16), and the remaining part is
After being hooked on the rear surface of the inclined portion (25) of (8), it is further wound around the right end of the horizontal shaft (16) several times, and the other end is brought into contact with the handle (13) of the stopper (12) from the front side. ing. The other end of the torsion coil spring (12) is located above the horizontal axis (16), and as a result, the stopper (12) has a top inward (rear) around the axis of the horizontal axis (16). ).

FIG. 5 shows a state in which the telescopic scaffold plate (2) is locked. The grip (13) of the stopper (12) is vertical, and the stopper (12) is engaged with the rack. Part (14) teeth
(14a) meshes with the rack (11). The horizontal shaft (16) of the stopper (12) is located at the front end of the guide groove (23) of the support bracket (18). In this locked state, when the grip (13a) of the handle (13) of the stopper (12) is grasped and the top of the stopper (12) is turned outward against the torsion coil spring (17), The teeth (14a) of the rack engaging portion (14) of the stopper (12) come off the rack (11). And the handle (13) of the stopper (12)
After the stopper (12) is rotated until it becomes horizontal, and the stopper (12) is moved inward in the width direction (rearward), the horizontal shaft (16) of the stopper (12) is supported by the support bracket (18). Is guided by the guide groove (23), moves rearward to the rear end of the guide groove (23),
The state shown in FIG. 6 is obtained. In this state, the torsion coil spring (17) urges the top of the stopper (12) upward, and the handle (13) of the stopper (12) is pressed from below onto the lower horizontal wall (22) of the support bracket (18). The rotation of the stopper (12) is prevented by the contact. Accordingly, the length of the telescopic scaffold (2) can be adjusted by releasing the hand from the stopper (12). When adjusting the length of the telescopic scaffolding plate (2), the length can be changed in units of one pitch of the rack (11), so that the length can be adjusted substantially continuously. After adjusting the length, pull out the stopper (12) forward, and the handle (1
When 3) is no longer in contact with the lower horizontal wall (22) of the support bracket (18), the stopper (12) is rotated by the upward biasing force of the torsion coil spring (12) and returns to the locked state in FIG. I do. These series of operations can be performed very easily. When storing and transporting the workbench (1), the workbench (1) can be stored extremely compactly by shortening the extensible scaffold plate (2) and then folding the extensible legs (3). .

FIGS. 7 and 8 show a modification of the stopper (12). The stopper (32) shown in the figure is obtained by press forming a steel plate, and has a substantially triangular plate-shaped handle portion (33) whose width becomes narrower as it goes upward, and a handle portion (33). A rack engaging portion (34) bent rearward at the top, a pair of left and right horizontal shaft supports (35) opposed to each other bent rearward at the bottom of the handle (33),
It consists of a horizontal shaft (16) passed between the left and right horizontal shaft supports (35).

At the rear end of the rack engaging portion (34) of the stopper (32), four teeth (34a) meshing with the rack (11) are provided. Then, the rack engaging portion (34) is inserted into the through hole (9) of the front wall (5a) of the second scaffold plate component (5), and the teeth (34)
a) is a rack provided on the front surface of the first scaffold plate component (4)
By engaging with (11), the left-right movement of the first scaffold plate component (4) with respect to the second scaffold plate component (5) is prevented. By pushing down the rack engaging portion (34) of the stopper (32) downward with the thumb, the engagement between the teeth (34a) of the rack engaging portion (34) and the rack (11) can be released.

The left and right horizontal shaft support portions of the stopper (32)
(35) has a hole (35a) penetrating it left and right. Then, the shaft of the horizontal shaft (16) with the head inserted from the left through hole (35a) is loosely fitted into the guide groove (23) of the support bracket (18), and the tip of the horizontal shaft (16) is Is the right through hole (35
a), and an E-ring (not shown) is fitted into a portion protruding from the through hole (35a). Thus, the stopper (32) is movable via the support bracket (18) in the front-rear direction and freely rotatable around the axis of the horizontal axis (16) having the horizontal axis. Supported by 5).

A circular through hole (33a) is provided substantially at the center of the handle (33) of the stopper (32). When changing from the unlocked state to the locked state, this through hole (33a)
The forefinger may be inserted into the device and the stopper (32) may be pulled out forward.

In addition, the first scaffold plate component (4) and the second
The shape of the scaffold plate constituent member (5) is not limited to the above-described embodiment, and various changes can be made. First scaffold plate component (4) and second scaffold plate component
(5) By making the cross-section substantially U-shaped with both open downwards, it is lightweight and has the required rigidity
Is obtained. In the above embodiment, the telescopic scaffold plate (2) of the present invention is provided on the workbench (1) .However, the telescopic scaffold plate (2) can be used alone as a temporary scaffold. is there.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a work table using a telescopic scaffold according to the present invention.

FIG. 2 is a perspective view of a main part of a telescopic scaffold plate.

FIG. 3 is a front view of a main part of the telescopic scaffold plate.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

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

FIG. 6 is a view corresponding to the locked state of FIG. 5, showing an unlocked state.

FIG. 7 is a perspective view showing a modification of the stopper.

8 is a diagram showing a case where the stopper of FIG. 7 is used in the locked state shown in FIG. 5;

[Explanation of symbols]

 (2) Telescopic scaffold plate (4) First scaffold plate component (5) Second scaffold plate component (6) Locking device (11) Rack (12) Stopper (13) Handle (14) Rack engaging part ( 16) Horizontal shaft (17) Torsion coil spring (32) Stopper (33) Handle (34) Rack engaging part

Claims (2)

[Claims] A first scaffold plate component and a second scaffold plate component in which the first scaffold plate component is fitted so as to be movable in the longitudinal direction.
(5) and the second scaffold plate component of the first scaffold plate component (4)
(5) Locking device that prevents longitudinal movement with respect to
(6) A telescopic scaffold plate comprising:
The rack (11) provided on the first scaffold plate component (4)
Stoppers (12) and (32) supported by the second scaffold plate member (5) and engaged with the rack (11); and stoppers (12) and (32)
Elastic member (1) that urges the
7) An elastic scaffold plate characterized by comprising: 2. The stopper (12) (32) is provided with a vertical handle (1).
3) (33), a rack engaging portion (14) (34) provided near the top of the handle (13) (33), and a pair of left and right provided at the bottom of the handle (13) (33). The width of the guide groove (23) provided between the horizontal shaft support portions (15) and (35) and the left and right horizontal shaft support portions (15) and (35) and provided in the second scaffold plate component (5). The horizontal member (16) is fitted so as to be freely movable in the direction, and is rotatable around the axis of the horizontal shaft (16).
Stop the stoppers (12) (3) in the direction in which the tops of (12) and (32) move inward.
2. The telescopic scaffold according to claim 1, wherein said scaffold is a torsion coil spring for urging said spring.