Information
-
Patent Grant
-
6832666
-
Patent Number
6,832,666
-
Date Filed
Friday, November 30, 200123 years ago
-
Date Issued
Tuesday, December 21, 200420 years ago
-
Inventors
-
Original Assignees
-
Examiners
Agents
- Emch, Schaffer, Schaub & Porcello Co., L.P.A.
-
CPC
-
US Classifications
Field of Search
US
- 182 141
- 182 118
- 292 4
- 292 32
- 292 60
- 292 61
- 292 163
- 292 164
-
International Classifications
-
Abstract
Scaffold having a locking and securing device for securing a first support to a second support is disclosed where the locking and securing device is movable between a secured position and an unsecured position by using a force at a substantially center point of the securing means.
Description
FIELD OF THE INVENTION
The present invention relates to a mobile utility scaffold having a locking and securing device for attaching a scaffolding platform side rail to a supporting structure.
BACKGROUND OF THE INVENTION
Scaffolds are used in many situations to provide an elevated platform for workers. Most scaffolding is made of tubular metal which is welded together to have vertical legs with horizontal rungs extending between the legs to form a ladder-like vertically extending supporting structure. Horizontally positioned platforms are held on side rails which are mounted to the vertically extending support structures.
Since scaffolding is often moved between work stations or is added to as work is completed, it is desired to design and construct scaffolding that is easy to assemble and disassemble and which also is very secure. It is also desired to have scaffolding which is economical to manufacture and is easily collapsed, stored and moved from one work location to another. In the industry, in order to make the scaffolding easy to assemble and adjust, the vertical and horizontal structures are made with tolerances such that the horizontal and vertical structures can be easily placed adjacent another. Since the vertical and horizontal supporting structures are manufactured with dimensions that allow one structure to be moved relative to the other structure, sometimes the resulting scaffold structure can be unreliable, shaky or difficult to secure. One problem is that these assembled scaffolding structures need to have secure locking mechanisms so that the horizontal structures and the vertical structures do not move relative to each other during use.
One type of latch mechanism M currently used by the owners of the instant invention is shown in FIG.
6
. An L-shaped pin P is held by a bracket welded to a horizontal support H. The L-shaped pin P extends through a spring S and the pin extends through an opening O in a vertical support V. The L-shaped pin P has a roll pin R adjacent the end of the pin P. To operate, a force is placed on the depending arm of the L-shaped pin P to either push or pull the pin P into or out of the opening O in the vertical support V.
Another type of prior art latch mechanism is shown in
FIG. 7. A
G-shaped pin G is held by a bracket B′ welded to a horizontal support H′. The G-shaped pin G extends through a spring S′ and extends through an opening O′ in a vertical support V. The G-shaped pin G has a roll pin R′ which extends in a vertical direction through one end of the pin G. To operate, a force is placed on the depending curved arm of the G-shaped pin G to either push or pull the pin G into or out of the opening O′ in the vertical support V′.
Many other types of latch mechanisms have been used to secure the horizontal platform to the vertical supporting structure. Examples of several of these efforts are shown in U.S. Pat. Nos. 409,167; 4,793,438; 5,028,164; 5,390,761; 5,931,260; 6,202,788 B1 and 6,273,831 B1.
One problem with the current latch mechanisms for scaffolding is that the latch mechanism could become loose or disengaged during use. Often a worker, while standing on the platform, moves about the platform which causes shifting and constant realignment of the horizontal work surface with respect to the vertical supporting structures. This lateral movement of the horizontal work surface could tend to cause the latch mechanisms to become loose or displaced relative to their initial position.
Latch mechanisms that use springs to hold the latch mechanism in position often present further problems. The use of springs has made the latch mechanism more difficult to operate. Typically, a great amount of force is needed in order to overcome the bias of the spring in order to disengage the latch mechanism. Often, the horizontal and/or vertical structure must be secured or stabilized with one hand while the other hand of the worker disengages the latch mechanism. In such situations, the scaffolding must be adjusted at least four individual spots and often times the one side of the horizontal structures are positioned at an acute angle with respect to the vertical structure during this adjustment period, causing undesirable stresses on the still-locked opposing latch mechanism.
Still other problems with the currently used latches occur since the scaffoldings are often used in construction and other work environments where material such as work equipment, debris or supplies are constantly being moved onto and off of the scaffolding. It is important to have a latch mechanism which cannot be accidentally disengaged and further which does not interfere with the movement of the worker, worker's tools or supplies, or any debris or materials being moved by the worker.
It is therefore an object of the present invention to provide a locking and securing mechanism that is easily secured and, further, is held in a secured locking position.
It is a further object of the present invention to provide a locking and securing mechanism which positively indicates that the mechanism is in a properly secured and locked position.
It is a further object of the present invention to provide a locking and securing mechanism which is inexpensive to manufacture.
It is yet another object of the present invention to provide a locking and securing mechanism which is strong and resistant to breakage or shearing.
It is yet another object of the present invention to provide a locking and securing mechanism which is easy to use and operate with one hand, such that two opposing locking and securing mechanisms can be simultaneously operated by one worker.
It is another object of the present invention to provide a scaffolding which is easy to be assembled and disassembled while also providing a strong and secure work surface for a worker.
It is another object of the present invention to provide a scaffolding in which a horizontal work platform can be quickly moved to new positions relative to vertical support structures.
Still another object of the present invention is to provide a locking and securing mechanism for a scaffolding which securely connects a horizontal work platform to vertical supporting structures of the scaffolding.
It is still a further object of the present invention to provide a locking and securing mechanism that can be used with currently available horizontal support structures and vertical support structures of a scaffolding system.
Yet another object of the present invention is to provide a scaffold assembly in which the platform securely held in horizontal position without moving out of place or becoming disengaged during use of the platform.
Additional objects, features and advantages of the present invention will become apparent to those skilled in the art upon consideration of the following detailed description of a preferred embodiment as described herein.
SUMMARY OF THE INVENTION
A device for locking and securing a first support to a second support is described. The locking and securing device includes a means for securing the first support to the second support. The securing means is moveably attached to the first support such that the securing means is moveable between a secured position and an unsecured position with respect to the second support. A force is applied at a substantially a center point of the securing means in order to move the securing means. The securing means has a handle positioned at a substantially center point of a securing pin for receiving the applied force.
The locking and securing device further includes a means for locking the first support to the second support. In one embodiment, the locking means is integrally formed with the securing means. During operation of the locking and securing device, the securing means is rotatably moveable about a longitudinally axis extending through the securing means. The securing means is also longitudinally moveable along the longitudinal axis such that the securing means is moved between the secured and unsecured positions and the locking means is moved between the locked position and the unlocked position.
In one aspect, the locking and securing device comprises an engagement member and a securing mechanism. The securing mechanism includes a longitudinally extending securing pin and a handle positioned in a substantially centered relationship with respect to the securing pin. The securing mechanism further includes a locking member positioned on the handle in a spaced apart relationship to the securing pin.
The securing pin extends through an opening in the engagement member such that the locking member is engageable with the engagement member when the locking member is in a locked position.
In one embodiment, the securing pin defines a radially extending opening at a midpoint of the securing pin for receiving a rivet pin. A first biasing means is axially positioned on the securing pin between the rivet pin and a first end of the securing pin. A second biasing means is axially positioned on the securing pin between the rivet pin and a second end of the securing pin.
In another embodiment, the scaffolding system comprises at least one horizontal support and at least one vertical support and a locking and securing device lock for securing and locking the horizontal support to the vertical support.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is a perspective view of a scaffolding incorporating a locking and securing device for securing a horizontally positioned side rail to a vertically extending support structure.
FIG. 2
is a perspective view, partially in phantom, of a locking and securing device incorporated into a scaffolding assembly where the locking and securing device is in an unengaged and unlock position.
FIG. 3
is a perspective view, partially in phantom and partially in cross-section, of a locking and securing device incorporated into a scaffolding assembly where the locking and securing device is in an engaged, but unlocked, position.
FIG. 4
is a perspective view, partially in phantom and partially in cross-section, of a locking and securing device incorporated into a scaffolding assembly where the locking and securing device is in an engaged and is being moved into a locking position.
FIG. 5
is a perspective view, partially in phantom and partially in cross-section, of a locking and securing device incorporated into a scaffolding assembly where the locking and securing device is in an engaged and locked position.
FIG. 6
is a side elevational view, partially in phantom, of a prior art latch mechanism.
FIG. 7
is a side elevational view, partially in phantom, of another prior art latch mechanism.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to
FIG. 1
, a locking and securing device
10
is shown as a component of a scaffold
12
operatively mounted on individual wheels
13
. The scaffold system
12
includes a horizontal side rail
14
structure operatively connected to a vertical supporting structure
16
. In the embodiment shown, the vertical supporting structure
16
comprises a first, or front, vertical support member or leg
18
, operatively connected to a second, or rear, vertical support member or leg
20
and having positioned therebetween a plurality of horizontally extending rungs or horizontal supports
22
. It is to be understood that the scaffolding typically comprises an opposing vertical support structure
26
which is similar to the first vertical support structure
16
, and has a first leg
28
, a second leg
30
and rungs
32
positioned horizontally therebetween.
The scaffold
12
further comprises a second horizontal side rail structure
34
which is in opposed and parallel relationship to the first side rail structure
14
. A work platform
36
is horizontally positioned between, and is held in position by, the first side rail
14
and the second side rail
34
.
The first side rail
14
has a first end
40
which terminates at a guard rail socket
44
. It is to be understood that the guard rail socket
44
can have any suitable cross-sectional shape, including but not limited to a generally round, square or rectangular shape and is shaped for receiving a guard rail (not shown). Attached to the guard rail socket
44
is a vertically extending channel member
60
. The channel
60
is operatively connected to the guard rail socket
40
in a suitable manner. Alternatively, the channel
60
and guard socket can be made as a uniform piece. The channel
60
has a first side
62
and a second, opposing side
64
connected by a base or third side
66
, as best seen in FIG.
2
.
It is to be understood that, in the embodiment shown, the side rail
14
and the opposing side rail
34
each has ends which are similar to the first end
40
, and that for ease of explanation, only one end
40
of the side rail
14
and the locking and securing device
10
operatively connected thereto, will be described in detail.
It can be seen in
FIGS. 1 and 3
that when the side rail
14
is positioned adjacent the leg
18
the three sides
62
,
64
and
66
of the channel
60
are positioned around the vertical supporting leg
18
. In the embodiment shown, the dimensions of the channel
60
and the vertical supporting leg
18
allow the channel
60
to be easily positioned around the leg
18
such that the channel
60
can be easily moved up and down the leg
18
in order to position the working platform
34
at a desired height.
As shown in
FIG. 1
, the vertical support members
18
,
20
,
28
and
30
define a plurality of vertically spaced apart apertures or openings
70
such that the side rail
14
can be positioned at different heights on the support members
18
,
20
,
28
and
30
, as will be described in detail below. That is, the front support members
18
and
28
and the rear support members
20
and
30
have a plurality of spaced apart apertures
70
such that opposing apertures are positioned in the same horizontal plane. The side rails
14
and
34
are moved and engaged within the apertures
70
on the opposing front and rear supporting vertical members, respectively.
In the embodiment, shown the side rail
14
and the side rail
34
each has substantially the same structure such that a guard rail can be either used on a front or rear of the scaffold. In the embodiment shown, a gusset
72
is positioned in a spaced apart relationship to the end
40
of the side rail
14
. The gusset
72
has a first end
74
which is attached to the side rail
14
and a second end
76
which is attached to the channel
60
at a predetermined distance away from the guard rail socket
44
and adjacent a lower end
65
of the channel
60
.
Referring now to
FIGS. 2-5
, the locking and securing device
10
is described in detail in connection with a scaffold. It should be understood, however, that the locking and securing device is useful in other applications and that such other applications are within the contemplated scope of the present invention.
The locking and securing device
10
includes a securing means or mechanism
80
. The securing mechanism
80
includes a longitudinally extending securing pin
82
, which, in this embodiment, is integrally formed with a handle
84
. The handle
84
has a length L. The pin
82
of the securing mechanism
80
extends in a direction away from the handle
84
in such a manner that the pin
82
is in a spaced apart relationship to the handle and is positioned substantially centered at the middle of the handle
84
.
The handle
84
has a first end
85
which extends between the handle
84
and the pin
82
. The first end
85
extends away from the handle
84
at an angle. In the embodiment shown, the first end
85
extends at an angle from the handle
84
and terminates at the pin
82
. The first end
85
generally has a depending section
83
such that the first end
85
and the depending section
83
generally define an angle. The depending section
83
terminates at the pin
82
. It should be understood that it is within the contemplated scope of the present invention that the handle
84
, the first end
85
, and the depending section
83
each has a shape and dimension that readily allow a worker to freely grasp the handle
84
and that such readily shape provides sufficient room and clearance for the worker's fingers and knuckles. As such, while the embodiment in the figure shows the depending section
83
, first end
85
, handle
84
and locking member
88
as defining a generally rectangular shape, other specific embodiments having shapes of the handle which allow for ease of grasping the handle
84
are also within the contemplated scope of the present invention. In the embodiment shown, the handle
84
has a length L while the depending section
83
of the first end
85
has a length ½L such that the pin
82
is positioned in a spaced apart relationship at substantially the center of the handle
84
.
The securing mechanism
80
further includes a locking means or member
88
, which in this embodiment, is integrally formed the handle
84
. The locking member
88
extends from a second end
86
of the handle
84
in a direction away from the handle
84
. The second or opposed end
86
is in a spaced apart relationship from the first end
85
of the handle
84
. In the embodiment shown, the locking member
88
and the handle
84
are in the same plane and the locking member
88
extends from the handle
84
at an angle. One embodiment, as shown in the figures shows the locking member
88
extending from the handle
84
at approximately a right angle.
The locking member
88
has an extending section
81
and an engaging means or section
87
. The extending section
81
is connected to the second end
86
of the handle
84
while the engaging section
87
is a spaced apart relationship to the second end
86
of the handle
84
. The engaging section
87
extends at an angle from the locking member
88
. In the embodiment shown, the engaging section
87
defines a distal end
89
which extends generally at an angle in a direction back toward the handle
84
. In the embodiment shown, the distal end
89
has a generally hocked, or C-shape. It is within the contemplated scope of the present invention that other embodiments can have the engaging section
87
define a different shaped distal end
89
, such as an acute angled shape or square or rectangular shape.
If the securing mechanism
80
were projected onto a three dimensional graph, the handle
84
would be in a plane extending through a line defined by the Y axis while the pin
82
would be in a plane extending through a line defined by the X axis. The pin
82
and the handle
84
are in the same plane (as defined by the X and Y axes). The pin
82
of the securing mechanism
80
is also in a spaced apart and parallel relationship with the extending section
81
of the locking member
88
. That is, the extending section
81
is also in a plane defined by the X axis. The engaging section
87
of the locking member
88
in a plane extending through a line defined by the Z axis away from the X axis (i.e., the Z plane is perpendicular to the X and Y axes). The distal end
89
extends from the engaging section back in a direction toward the handle
84
such that the distal end
89
is in a second plane extending through a line defined by a second Y axis.
The pin
82
defines a longitudinally extending portion
94
having a first end
90
which is in opposed relationship to a second end
92
. The second end
92
is adjacent the depending end
83
of the first end
85
of the handle
84
. The pin
82
defines an opening
96
which receives a rivet or roll pin
98
. In a the embodiment shown, the opening
96
is spaced at a midpoint located approximately midway between the first end
90
and the second end
92
of the pin
82
. The opening
96
extends through the pin
82
in a substantially Z direction when the securing mechanism
80
is in an open and unsecured position, as shown in
FIG. 2
, and when the securing mechanism is in the locked, and locked and secured position, as shown in
FIGS. 4 and 5
, respectively.
The locking and securing device
10
further includes a first biasing member, such as, for example a spring,
100
which is axially positioned between the roll pin
98
and the first end
90
of the pin
82
along the axis defined by the pin
82
. The locking and securing device
10
further includes a second biasing member or, such as, for example a spring,
104
which is axially positioned on the pin
82
in an opposed relationship to the first biasing member
100
and is positioned on an opposite side of the roll pin
98
and adjacent the second end
92
of the first pin
82
.
In the embodiment shown, the locking and securing device
10
is shown being operatively connected to and positioned on the scaffold
12
. In various embodiments, the locking and securing device
10
further includes a guide or engagement member
110
, as described in detail below, which can be operatively connected to or integrally formed with the scaffold
12
. In other, diverse applications where the locking and securing device
10
is to be used, similar type engagement members can be connected to or are formed with a part of that particular application. This can best be understood by referring to the figures herein which show such engagement member
110
on the scaffold
12
.
FIG. 2
shows the locking and securing device
10
in an open and unsecured position. The securing mechanism
80
is held or suspended from the side rail
14
by the engagement member
110
. In the embodiment shown, the engagement member
110
has a substantially L-shape; however, other shapes are also within the contemplated scope of the invention. The pin
82
of the securing mechanism
80
extends through an opening
112
in a first arm
114
of the engagement member
110
. The engagement member
110
has a second arm
116
which extends at an angle from the first arm
114
in a direction toward the first end
90
of the pin
82
. The pin
82
axially extends through the opening
112
of the first arm
114
at substantially a right angle. In the open and unlocked position shown in
FIG. 2
, the second biasing member
104
is under compression.
Referring now to
FIG. 3
, the locking and securing device
10
is shown in a secured position where the side rail
14
is positioned against the vertical support
18
. The guard rail socket
40
defines opposing openings
120
and
122
which are in an axial relationship for receiving the pin
82
. A further axially positioned opening
124
extends through the side leg
64
of the channel
60
for receiving the first end
90
of the pin
82
. The pin
82
is at a right angle with respect to the guard rail support
44
and the channel
60
. As shown in
FIG. 3
, the securing mechanism
80
is moved in a direction of the arrow A by applying a force, or pushing, on the handle
84
. The securing mechanism
80
is moved in an axial direction along the X axis such that the second biasing member
104
is no longer under compression, but the first biasing member
100
is now under compression. The first end
90
of the pin
82
passes through the openings
120
and
122
of the guard rail socket
40
and through the opening
124
in th side leg
64
of the channel
60
. The first biasing member
100
is compressed between a first side
43
of the guard rail socket
40
and the pin
98
.
The handle
84
is in an opposed and centered position with respect to the pin
82
. That is, the handle
84
is positioned in a spaced apart relationship substantially at the center of the pin
82
. The centered position of the handle
84
with respect to the pin
82
reduces the pressure on the worker's fingers or hand by reducing or eliminating the torque force. The resulting friction needed to compress the first biasing member
100
and to advance the securing mechanism
80
in a direction toward the vertical support member
18
is greatly reduced.
FIG. 4
shows the securing mechanism
80
in a rotated position about the X axis. The securing mechanism
80
is rotated in the direction of arrow B by grasping the handle
84
. In operation, the securing mechanism
80
is rotated about the X axis of the pin
82
such that the locking member
88
is rotated at least about 160° to about 180° about the X axis. The locking member
88
is brought into an adjacent relationship with the engagement member
110
. It is to be understood that the locking member
88
has a sufficient length to allow the locking member
88
to freely rotate in an upward direction (while the first biasing member
100
is in a compressed state) such that the distal end
89
of the locking member
88
extends beyond the second arm
116
of the engagement member
110
. The locking member
88
is brought into engaging contact with the engagement member
110
when the force on the securing mechanism
80
is released, as shown in FIG.
5
.
FIG. 5
shows the locking and securing device
10
in a locked and secured position. The securing mechanism
80
is allowed to move in the axial direction of arrow C along the X axis. By releasing the compressive tensioning force on the handle
84
, the first biasing member
100
acts to move the securing mechanism
80
in a direction toward the engagement member
110
. The hook or distal end
89
engages the second arm
116
of the engagement member
110
. The second biasing member
104
provides tension on the securing mechanism
80
to keep the distal end
89
of the locking member
88
secured against the second arm
116
of the engagement member
110
.
As can best be seen in
FIGS. 4 and 5
, the rivet or roll pin
98
is in a spaced apart relationship from the first end
90
of the pin
82
. In the embodiment shown, the pin
98
is a predetermined mid point distance away from the load being placed on the pin
82
by the weight of the side rail
14
, vertical support
18
, and work platform
36
. The distance between the roll pin
98
and the load (which is supplied by the platform at the point of contact of the aperture
70
in the vertical support member
18
) results in decreased load stresses on the pin
82
. That is, there is less bending moment when the pin
98
is in a spaced apart relationship from the load and, consequently, there is less likely to be failure of the pin
82
or securing mechanism
80
.
In the embodiment shown, the securing mechanism
80
is made as a single piece. The securing mechanism
80
is fully compatible with many types of scaffolding assemblies currently in use. Further, the securing mechanism
80
provides additional safety by having the hook or distal end
89
engage the engagement member
110
to ensure that the locking and securing device
10
is not accidentally unsecured.
In operation, the locking and securing device
10
is opened by first moving the handle
84
in a direction toward the engagement member
110
thereby compressing the second biasing member
104
. The handle
84
is rotated about the X axis in a direction away from the engagement member
110
such that the distal or hook end
89
of the locking member
88
is rotated in a direction away from the engagement member
110
, allowing the hook end
89
to clear or pass beyond the second arm
116
of the engagement member
110
. Referring now again to
FIG. 2
, the handle
84
is moved away from the engagement member
110
in a direction shown by arrow D. As the handle
84
is moved toward the gusset
72
, the second biasing member
104
is compressed between the pin
98
and the first arm
112
of the engagement member
110
. The movement of the handle
84
in the direction of arrow D allows the first end
90
of the pin
82
to be removed from the vertical support member
18
such that the side rail
14
is unsecured from the vertical support member
18
. The pin
82
travels in a direction away from the channel
60
such that the first end
90
of the securing mechanism
80
is withdrawn from the opening
122
in the leg
62
and from the opening
70
in the vertical support member
18
.
It is to be understood that the biasing members
100
and
104
can be any type of suitable biasing or spring mechanism including, for example, a wave washer under tension or one spring having opposing ends positioned on either side of the roll pin
18
. The biasing member acts to allow compression and tension to be put on the securing mechanism
80
while the securing mechanism
80
is being moved to a closed position and when the securing mechanism in the closed and locked position.
The locking and securing device
10
provides the worker with an easy to operate locking and securing mechanism. In embodiments where the locking and securing device
10
is used to secure a scaffold, the gusset
72
is positioned at a determined distance away from the device
10
such that the worker can wrap his hand around the gusset
72
(for example, having the thumb on one side of the gusset and the palm and fingers on an opposing side of the gusset). The position of the gusset
72
allows the worker's fingers to be easily secured or wrapped around the handle
84
of the securing mechanism
80
. The gusset
72
provides leverage and ease of motion for initially securing the side rail channel
14
onto the vertical support. It is to be understood that, while the lengths of the side rail
14
can be of any desired distance or length, the length of the side rail
14
, in many commercial embodiments, is such that the worker can simultaneously operate opposing securing mechanisms
80
on each end of the side rail. Once the side rail
14
is initially secured in the corresponding apertures
70
in each vertical support member
18
, the worker then individually locks the securing mechanism
80
by pivoting the pin
82
about the X axis allowing the distal end
89
of the locking member
88
to be secured adjacent the engagement member
110
.
While the securing mechanism
80
is shown as having a generally rectangular shaped handle
84
and a C-shaped distal end
89
which extends therefrom at a right angle, it is to be understood that other shapes can be used, such, as square, rectangular or circular, to form the handle
84
and locking member
88
and that such are within the contemplated scope of the present invention.
The locking and securing device of the present invention provides a pin and locking assembly in a single unit which simplifies construction and reduce the costs of the locking and securing device. The locking and securing device is incorporated into a scaffold, requires fewer welding points in order to produce than in many currently used latch mechanism.
It is to be understood that it is within the contemplated scope of the present invention that the locking and securing device can be used for purposes other than securing side rails to vertical supports of a scaffold. The positive securing and locking components of the locking and securing device can be used in other applications where it is desired to both secure and lock a first member in an opposed relationship to a second member.
Although the invention has been described in detail with reference to a certain preferred embodiment, variations and modifications exist within the scope and spirit of the invention as described and defined in the following claims.
Claims
- 1. A scaffold system comprising at least one first support and at least one second support and at least one locking and securing device for removably securing and locking the first support to the second support, the locking and securing device having a means for securing the first support to the second support, the securing means being movably attached to the first support and being movable between a secured position and an unsecured position with respect to the second support by using a force at a substantially coaxial center point of the securing means; and a means for locking the securing means to the first support when the securing means is in the secured position in the second support, the locking means being integrally formed with a handle;the securing means and the locking means being rotatably moveable about a longitudinal axis extending through the securing means, the locking means being longitudinally moveable along the longitudinal axis thereby allowing the securing means to be moveable between the secured position and the unsecured position and thereby allowing the locking means to be moveable between a locked position and an unlocked position; wherein the second support includes at least one opening for receiving the securing means when the securing means is in the secured position; wherein the first support includes a channel member for receiving a portion of the second support when the first support is secured to the second support; wherein the channel member defines at least one opening for receiving a portion of the securing means; further including at least one guide rail socket for receiving one end of a guide rail, the guide rail socket being adjacent and substantially parallel to the channel member; and wherein the guide rail socket defines first and second openings that are in opposing sides of the guide rail socket for receiving a portion of the securing means.
- 2. The scaffold system of claim 1, wherein the securing means includes a securing pin and a handle positioned in a spaced apart relationship to and at substantially the center point of the securing pin.
- 3. The scaffold system of claim 2, wherein the securing pin is positioned at an angle with respect to the first support.
- 4. The scaffold system of claim 2, wherein the handle is integrally formed with the locking means.
- 5. The scaffold system of claim 2, wherein the locking means includes an engaging means for engagement with the first support when the locking means is in the locked position.
- 6. The scaffold system of claim 5, wherein the first support is operatively connected to an engagement means for engagement with the engaging means of the locking means.
- 7. The scaffold system of claim 6, wherein the securing means is positioned at an angle with respect to the engagement means and extends through an opening in the engagement means.
- 8. The scaffold system of claim 1, wherein the securing means further includes at least one biasing means for holding the securing means in the secured position.
- 9. The scaffold system of claim 8, wherein the securing means further includes a second biasing means for holding the locking means in the locked position.
- 10. The scaffold system of claim 9, wherein the first biasing means and the second biasing means are coaxially positioned on the securing means.
- 11. The scaffold system of claim 10, wherein the first and second biasing means are spaced apart from one another by a rivet pin extending radially through the securing means.
- 12. The scaffold system of claim 3, wherein the rivet pin is positioned in the securing pin at substantially a midpoint along a longitudinal length of the securing means.
- 13. The scaffold system of claim 2, wherein the handle and the securing pin are at an angle with respect to each other and are in the same plane with respect to each other.
- 14. The scaffold system of claim 13, wherein the locking means includes an engaging means which is in a spaced apart relationship to the handle and is positioned at an angle to the handle, the engaging means and the handle each defining planes that are perpendicular to each other.
- 15. The scaffold system of claim 14, wherein the second support defines an engagement member for engagement with the locking means when the locking means is in the locked position.
- 16. The scaffold system of claim 15, wherein the engagement member is operatively connected to the first support.
- 17. The scaffold system of claim 1, wherein the securing means has no threaded portion.
- 18. The scaffold system of claim 1, wherein the locking means has no threaded portion.
- 19. The scaffold system of claim 1, wherein the securing and the locking means are secured by being rotated about one half turn.
- 20. The scaffold system of claim 1, wherein the securing means and the locking means are secured by being rotated about 160° to about 180°.
US Referenced Citations (16)