The present invention relates to the field of safety gates.
In industrial applications, mezzanine floor systems are semi-permanent floor systems typically installed within buildings, built between two permanent original stories. These structures are usually free standing and, in most cases, can be dismantled and relocated. Commercially sold mezzanine structures are generally constructed of steel, aluminum, and fiberglass.
Mezzanines are frequently used in industrial operations such as warehousing, distribution or manufacturing. These facilities have high ceilings, allowing unused space to be utilized within the vertical cube. Industrial mezzanine structures are typically either structural, roll formed, rack-supported, or shelf-supported, allowing high density storage within the mezzanine structure.
Mezzanines are often built without fall protection resulting in frequent accidents including serious injury and even death. Moreover, in order for fork lifts and other machinery to access and deliver and receive goods to and from a mezzanine level, an opening must be present within existing railing and barrier systems. There have been many attempts to try and solve this problem without any reliable, cost effective solution. For example, employees have been required to connect themselves by a cord or other connection means to part of the mezzanine structure, such that if they did fall the cord would prevent them from falling over the side of the mezzanine onto the floor below. However, this requires that the employee painstakingly follow through with connecting and disconnecting throughout each position on the mezzanine. This process of connecting and disconnecting requires substantial time and effort in order to properly follow through. Other varying gate and rail solutions have been tried without success such as duel interlock roll around gates, barn door style gates, or gates that swing open. However, these types of design are expensive and require more space, thus reducing the available storage. Moreover, electric hand rail systems have been tried, but have been found to be extremely costly and require an operator.
For the foregoing reason, there is a need for an apparatus that will provide a cost efficient, yet safe and reliable, easy to remove and operate fall protection for mezzanines and other platform applications.
In accordance with the invention, a safety gate apparatus is provided which couples as a cost efficient and reliable gate for preventing falls and injury as well as a gate that can easily be adapted for use in conjunction with a fork lift for delivery of goods to and from an elevated platform. This provides a safe, low-cost, and time saving approach for preventing falls while efficiently delivering goods to and from an elevated platform without hassle.
The invention generally comprises a support structure for supporting a gate assembly that is configured to move between a default, closed position to an open position. Ideally, the gate is opened, providing a delivery space for delivery of goods to a platform, by the application of force by way of the forks of a forklift. After the presence of the forks are removed from the gate, the safety gate will automatically return to the default, close position which provides a lower barrier and an upper barrier that is qualified to meet or exceed OSHA law and regulations per the United States Department of Labor, thereby preventing fall and mitigating risk.
In a version of the invention, a safety gate apparatus is provided which comprises (a) a first and second support structures, each having a base portion and an upper portion, wherein the support structures are laterally disposed defining a delivery space therebetween for ingress and egress of the forks of the fork lift; (b) a moveable gate assembly supported by the first and second support structures and moveable between the closed, default position and the open position, the gate assembly comprising: (i) a base plate having a substantially flat surface, a forward perimeter and aft perimeter, the base plate pivotally connected to the base portion of each of the first and second support structures near the front perimeter about a first axis of rotation and is configured to operably move through a path of motion between the default, closed position and the open position, wherein while in the default, closed position, the base plate flat surface extends vertically parallel with and between the first and second support structures forming a lower barrier, and wherein while the base plate is in the open position, the base plate is perpendicular and substantially aft of the first and second support structures; (ii) first and second gate arms each having a proximal and distal end, each gate arm pivotally and operably connected to the upper portion of the respective first and second support structures and each is configured to pivotally move about a first axis of rotation and a second axis of rotation respectively through a path of motion between the default, closed position and the open position, wherein while in the closed, default position, each gate arm longitudinally aligns with the other to form an upper barrier between the upper portions of each of the support structures, and wherein while in the open position, each gate arm pivots aft of their respective support structures defining an unhindered length of space between the upper portions of each support structure; and wherein each gate arm is mechanically linked to the movement of the base plate, wherein as the base plate moves aft through its path of motion, each of the gate arms simultaneously move aft through their respective paths of motion.
In a version of the application, the safety gate apparatus further comprises a locking means for selectively locking the gate assembly in a static position, whereby a user can selectively lock the gate assembly in the default, open position or the closed position during operation thereof.
In a detailed version of the application, each gate arm is operably connected to the plate via a mechanical linkage embedded within each respective support structure, wherein each mechanical linkage comprises: a linear shaft having a top end, a bottom end, and an axis of rotation, the linear shaft extending between the bottom portion and the upper portion within the respective vertical support structure; the top end of the shaft operably connected to the rotational movement of the respective gate arm; a first gear operably positioned at the bottom end of the linear shaft; and a second gear operably connected to the rotational movement of the base plate, wherein the second gear is operably configured to engage the first gear throughout the path of motion of the base plate.
In yet another detailed version, the safety gate base plate has a rectangular perimeter defining a flat linear surface having opposing side perimeters, and opposing side rails positioned at each side perimeter extending normal to the linear surface forming a tray configuration.
Still other versions, benefits and advantages of the invention will become apparent to those skilled in the art to which it pertains upon a reading and understanding of the following detailed specification.
These and other features, aspects, and advantages of the present invention will become better understood with regard to the following description and accompanying figures where:
Referring now to the figures wherein the showings are for purposes of illustrating a preferred version of the invention only and not for purposes of limiting the same, the present invention is safety gate apparatus configured to move between a default, closed position and an open position. The safety gate provides a safe, ergonomic safety barrier for preventing falls and injury as well as a gate that can easily be opened by existing equipment such as a fork lift by the application of minimal force. The safety gate meets or exceeds industry standards in its current form.
The following detailed description is of the best currently contemplated modes of carrying out exemplary versions of the invention. The description is not to be taken in the limiting sense, but is made merely for the purpose illustrating the general principles of the invention, since the scope of the invention is best defined by the appended claims.
Various inventive features are described below that can each be used independently of one another or in combination with other features.
With reference to the figures, particularly
In further detail, the support assembly 12 generally comprises a first and second vertical support structures 16L, 16R which house some of the working components of the gate assembly 14. The support structures 16L, 16R are laterally positioned defining a delivery space 23 therebetween, particularly shown in
As best illustrated by
In the illustrated version, the base plate 24 comprises a substantially flat linear surface 30 having a forward portion 31 including a forward perimeter 32 and aft perimeter 34 and opposing side perimeters 36L, 36R. The base plate 24 forward portion 31 is pivotally and operably connected between opposing base portions 20L, 20R of the first and second support structures 16L, 16R. The base plate 24 operably pivots about an axis of rotation Z passing between each support structure 16L, 16R base portion 20L, 20R and traversing the base plate 24 as best shown in
In the detailed version and as best illustrated by
The base plate 24 is configured to operably move through a path of motion from a vertical, gate closed position to a horizontal, gate open position. Referring to
The gate assembly 14 further comprises a first and second upper gate arms 26L, 26R, each pivotally attached to the upper portion 22L, 22R of each respective support structures 16L, 16R. Each gate arm 26L, 26R generally operably pivots horizontally a closed gate position (
As illustrated best in
In the version as best illustrated by
In the illustrated version, the mechanical linkage 54, 56 for each side generally comprises a linear shaft 58 having a top end 60 and a bottom end 62 which extends between the base portion 20 and the upper portion 22 of the vertical support structures 16L, 16R. The top end 60 of the linear shaft 58 operably connects with the proximal end 40 of the respective gate arms 26—providing the axis of rotation N thereof. The bottom end 62 of the linear shaft 58 operably connects with the adjacent side of the base plate 24 axis of rotation Z by way of a bevel type gear assembly 64 as illustrated in
As best illustrated by
Referring now to
In the illustrated version, the means for locking selectively and securely locks the rotational axis Z of the base plate 24. Specifically, as shown in
Referring to
In a version of the application as illustrated by
The safety gate 10 can be made in any manner and of any material chosen with sound engineering judgment. Preferably, materials will be strong, lightweight, long lasting, economic, and ergonomic.
The invention does not require that all the advantageous features and all the advantages need to be incorporated into every version of the invention.
Although preferred embodiments of the invention have been described in considerable detail, other versions and embodiments of the invention are certainly possible. Therefore, the pre-sent invention should not be limited to the described embodiments herein.
All features disclosed in this specification including any claims, abstract, and drawings may be replaced by alternative features serving the same, equivalent or similar purpose unless expressly stated otherwise.