Patent Description:
The steel bar truss deck is formed by welding a bottom plate to a steel bar truss, and the steel bar truss is formed by welding an upper chord rib <NUM>, a lower chord rib <NUM> and a truss footing <NUM> connecting the upper and lower chord ribs (shown in <FIG>). The truss footing <NUM> is made of wave-shaped rebars. At present, the truss cutoff operation is involved in the truss production line, and typically, avoids the position of the truss footing. However, in the case where there exist special needs or the truss must be cut off from the position of the truss footing, the truss footing is usually cut off by manually using a toothless saw or the like. Such cutoff manner has some problems, for example, the length precision of the steel bar truss is difficult to control, and the production efficiency is low. Moreover, the labor intensity of the operator is too high, and there is a potential safety hazard.

The present application provides a truss footing cutoff device to solve problems of low production efficiency and high labor intensity existing in the existing truss footing cutoff manner.

To achieve this object, the present application adopts technical solutions described below.

The truss footing cutoff device includes a rack; a fixed blade holder; two cutoff arms and a driving member.

The fixed blade holder is fixed on the rack. Two fixed blades are symmetrically arranged on the fixed blade holder, the fixed blade holder is configured to support a truss, and each of the two fixed blades is configured to support a truss footing of the truss.

The two cutoff arms are symmetrically arranged on the rack. Each of the two cutoff arms is provided with a movable blade.

The driving member is mounted on the rack and is configured to drive the two cutoff arms to move, so that the each of the two cutoff arms drives the movable blade to get close to a respective one of the two fixed blades, and the movable blade cooperates with the respective one of the two fixed blades to cut off the truss footing.

Optionally, the two cutoff arms are rotatably mounted on the rack, the driving member is capable of driving the two cutoff arms to rotate, and the movable blade is mounted at one end of the each of the two cutoff arms and is capable of being driven by the each of the two cutoff arms to rotate.

Optionally, the truss footing cutoff device further includes a transmission assembly. The transmission assembly includes a crankshaft rotatably mounted on the rack and two connecting arms mounted on the crankshaft and capable of only rotating relative to the crankshaft, each of the two connecting arms is rotatably connected to a respective one of the two cutoff arms, the driving member is drivingly connected to the crankshaft and is capable of driving the crankshaft to rotate, and the crankshaft is capable of driving the two connecting arms to stretch out and draw back synchronously when the crankshaft rotates.

Optionally, the crankshaft includes a first connecting part and a second connecting part, a central axis of the first connecting part and a central axis of the second connecting part are symmetrically arranged with respect to a centerline of the crankshaft, one of the two connecting arms is rotatably connected to the first connecting part and the other one of the two connecting arms is rotatably connected to the second connecting part.

Optionally, the transmission assembly further includes a connecting rod, one end of the connecting rod is rotatably connected to the each of the two connecting arms, and the other end of the connecting rod is rotatably connected to the respective one of the two cutoff arms.

Optionally, two driving members are provided, and each of the two driving members is drivingly connected to a respective one of the two cutoff arms.

Optionally, the two driving members synchronously operate so as to drive the two cutoff arms to synchronously rotate.

Optionally, the two cutoff arms are slidably mounted on the rack, the driving member is capable of driving the two cutoff arms to slide, and the movable blade is mounted at one end of the each of the two cutoff arms and is capable of being driven by the each of the two cutoff arms to move towards the fixed blade.

Optionally, the driving member is an air cylinder or an oil cylinder, and an output end of the air cylinder or the oil cylinder is connected to the two cutoff arms.

Optionally, the fixed blade holder includes a supporting part and two mounting parts located at two sides of the supporting part, the supporting part is configured to support the truss, and the two fixed blades are fixedly mounted on the two mounting parts respectively.

The present application is further described hereinafter in detail in conjunction with drawings and embodiments. It is to be understood that the embodiments described herein are intended to explain the present application and not to limit the present application. Additionally, it is to be noted that for ease of description, only part, not all, of the structures related to the present application are illustrated in the drawings.

In the description of the present application, unless otherwise expressly specified and limited, the term "connected to each other", "connected" or "secured" is to be construed in a broad sense, for example, as securely connected, detachably connected or integrated; mechanically connected or electrically connected; directly connected to each other or indirectly connected to each other via an intermediary; or internally connected between two components or interaction relations between two components. For those of ordinary skill in the art, specific meanings of the preceding terms in the present application may be understood based on specific situations.

In the present application, unless otherwise expressly specified and limited, when a first feature is described as "above" or "below" a second feature, the first feature and the second feature may be in direct contact or be in contact via another feature between the two features. Moreover, when the first feature is described as "on", "above", or "over" the second feature, the first feature is right on, above, or over the second feature or the first feature is obliquely on, above, or over the second feature, or the first feature is simply at a higher level than the second feature. When the first feature is described as "under", "below", or "underneath" the second feature, the first feature is right under, below, or underneath the second feature or the first feature is obliquely under, below, or underneath the second feature, or the first feature is simply at a lower level than the second feature.

In the description of this embodiment, the orientation or position relationships indicated by terms "above", "below", "right" and the like are based on the orientation or position relationships shown in the drawings, merely for ease of description and simplifying an operation, and these relationships do not indicate or imply that the referred device or element has a specific orientation and is constructed and operated in a specific orientation, and thus it is not to be construed as limiting the present application. In addition, the terms "first" and "second" are used only to distinguish between descriptions and have no special meaning.

The present application provides a truss footing cutoff device, which can achieve the automatic cutoff of a truss footing <NUM> of a truss <NUM> without the manual cutoff, and thus has a higher automation degree, improves the production efficiency, and reduces the labor intensity of the operator and the potential safety hazard.

As shown in <FIG>, the truss footing cutoff device includes a rack <NUM>, a fixed blade holder <NUM>, a fixed blade <NUM>, a cutoff arm <NUM>, a movable blade <NUM>, a driving member <NUM> and a transmission assembly <NUM>.

The rack <NUM> is configured to carry the fixed blade holder <NUM>, the fixed blade <NUM>, the cutoff arm <NUM>, the movable blade <NUM>, the driving member <NUM> and the transmission assembly <NUM> to achieve the cutoff operation of the truss footing <NUM>.

The fixed blade holder <NUM> is fixed to the rack <NUM> and is optionally placed at a top position of the rack <NUM>. A shape of the fixed blade holder <NUM> is adapted to a shape of the truss <NUM>. As shown in <FIG> and <FIG>, the fixed blade holder <NUM> includes a supporting part <NUM> and mounting parts <NUM> located at two sides of the supporting part <NUM>. The supporting part <NUM> is substantially in an inverted trapezoidal structure, and the truss <NUM> can be placed on and supported by the support part <NUM>. The mounting part <NUM> is configured to fix and mount the fixed blade <NUM>, and when the truss <NUM> is placed on the support part <NUM>, the truss footing <NUM> can be placed on the fixed blade <NUM>.

The cutoff arm <NUM> is mounted on the rack <NUM> and is rotatable relative to the rack <NUM>. As shown in <FIG>, an upper-middle position of the cutoff arm <NUM> is rotatably connected to the rack <NUM> through a rotary shaft. The movable blade <NUM> is mounted at one end of the cutoff arm <NUM> close to the rotary shaft, and the movable blade <NUM> can get close to or move away from the fixed blade <NUM> with the rotation of the cutoff arm <NUM>. When the cutoff arm <NUM> drives the movable blade <NUM> to get close to the fixed blade <NUM>, the movable blade <NUM> and the fixed blade <NUM> cooperate to cut the truss footing <NUM>.

Exemplarily, in this embodiment, two cutoff arms <NUM> are symmetrically arranged on the rack <NUM>, and correspondingly, two movable blades <NUM> and two fixed blades <NUM> are also symmetrically arranged, thereby achieving the cutoff of truss footings <NUM> on two sides of the truss <NUM>.

The driving member <NUM> is configured to drive the cutoff arm <NUM> to rotate relative to the rack <NUM>. The driving member <NUM> may be a motor or a deceleration motor. Two driving members <NUM> may be provided, where each driving member <NUM> drives one cutoff arm <NUM> to rotate so as to cut off the truss footing <NUM>. Optionally, the two driving members <NUM> synchronously operate to synchronously cut off the truss footings <NUM> on two sides of the truss <NUM> at a same position, thereby improving the cutoff efficiency.

Considering the production cost, in this embodiment, , only one driving member <NUM> may be provided, and in this case, the driving member <NUM> drives the cutoff arms <NUM> to rotate through the transmission assembly <NUM>. Referring to <FIG> and <FIG>, the above transmission assembly <NUM> includes a crankshaft <NUM>, connecting arms <NUM> and connecting rods <NUM>.

The crankshaft <NUM> is rotatably mounted on the rack <NUM> and can be driven by the driving member <NUM> to rotate. The crankshaft <NUM> is provided with a first connecting part <NUM> and a second connecting part <NUM>. One connecting arm <NUM> is rotatably connected to the first connecting part <NUM> and the other connecting arm <NUM> is rotatably connected to the second connecting part <NUM>. One end of each connecting arm <NUM> is rotatably connected to one end of a respective connecting rod <NUM>, the other end of the respective connecting rod <NUM> is rotatably connected to one cutoff arm <NUM>. In this way, when the connecting arm <NUM> is driven by the crankshaft <NUM> to stretch out or draw back, the connecting arm <NUM> can drive the cutoff arm <NUM> to rotate, and then the cutoff arm <NUM> drives the movable knife <NUM> to get close to or move away from the fixed blade <NUM>.

Exemplarily, a central axis of the first connecting part <NUM> and a central axis of the first connecting part <NUM> are symmetrically arranged with respect to a centerline of the crankshaft <NUM>. The central axis of the first connecting part <NUM> and the central axis of the second connecting part <NUM> are symmetrically arranged with respect to the centerline of the crankshaft <NUM> so that when the crankshaft <NUM> rotates, the two connecting arms <NUM> can be driven to stretch out at the same time and then the two cutoff arms <NUM> and the two movable blades <NUM> can be driven to get close to the fixed blades <NUM> at the same time, so as to achieve the synchronous cutoff of the truss footings <NUM> on two sides of the truss <NUM>; or the two connecting arms <NUM> can be driven to draw back at the same time and then the two cutoff arms <NUM> and the two movable blades <NUM> can be driven to move away from the fixed blades <NUM> at the same time.

When the truss footing cutoff device in this embodiment works, first, the truss <NUM> is placed on the supporting part <NUM> of the fixed blade holder <NUM>, and the truss footing <NUM> is located on the fixed blade <NUM>; then, the crankshaft <NUM> is driven by the driving member <NUM> to rotate, the crankshaft <NUM> drives the two connecting arms <NUM> to stretch out, and each connecting arm <NUM> drives the respective cutoff arm <NUM> to rotate, and the rotation of the cutoff arm <NUM> drives the movable blade <NUM> to get close to the fixed blade <NUM>; and finally the movable blade <NUM> cooperates with the fixed blade <NUM> to cut off the truss footing <NUM>.

After the truss footing <NUM> is cut off, the truss <NUM> continues to be transported backward to a truss shearing device, and an upper chord rib and a lower chord rib of the truss <NUM> are cut off by the truss shearing device, thereby completing the cutoff of the whole truss <NUM>.

This embodiment provides a truss footing cutoff device. The difference between this embodiment and embodiment one is that in this embodiment, the cutoff arm is not rotatably arranged on the rack, but is slidably arranged on the rack; the driving member is configured to drive the cutoff arm to slide; and the transmission component is not provided.

Optionally, a slide rail may be provided on the rack, and correspondingly, a slide block is provided on the cutoff arm. The driving member drives the cutoff arm to slide in a vertical direction, and the slide block and the slide rail can play roles of guiding and stably supporting.

At the same time, the driving member of this embodiment may be an air cylinder or an oil cylinder, and an output end of the air cylinder or the oil cylinder is connected to the cutoff arm. Two driving members may be provided. Each driving member is drivingly connected to one cutoff arm, and optionally, the two driving members synchronously operate so as to achieve the synchronous sliding of the cutoff arms. One driving member may also be provided, and in this case, a connection member needs to be provided. Two cutoff arms are fixedly connected through the connection member, an output end of the driving member is fixedly connected to the connection member, the connection member is driven by the driving member to move, and then the connection member can drive the two cutoff arms to slide at the same time.

The remaining structure of this embodiment is the same as the structure of the embodiment one, and will not be repeated here.

When the truss footing cutoff device in this embodiment works, first, the truss is placed on the supporting part of the fixed blade holder, and the truss footing is located on the fixed blade <NUM>; then, the cutoff arm is driven by the driving member to slide downwards, and the movable blade on the cutoff arm is driven to get close to the fixed blade, and finally cooperates with the fixed blade to cut off the truss footing.

When the truss footing is cut off, the truss continues to be transported backward to a truss shearing device, and an upper chord rib and a lower chord rib of the truss are cut off on the truss shearing device, thereby completing the cutoff of the whole truss.

Claim 1:
A truss footing cutoff device, comprising:
a rack (<NUM>);
a fixed blade holder (<NUM>) fixed on the rack (<NUM>), wherein two fixed blades (<NUM>) are symmetrically arranged on the fixed blade holder (<NUM>), the fixed blade holder (<NUM>) is configured to support a truss (<NUM>), and each of the two fixed blades (<NUM>) is configured to support a truss footing (<NUM>) of the truss (<NUM>);
two cutoff arms (<NUM>) symmetrically mounted on the rack (<NUM>), wherein each of the two cutoff arms (<NUM>) is provided with a movable blade (<NUM>); and
a driving member (<NUM>) mounted on the rack (<NUM>) and configured to drive the two cutoff arms (<NUM>) to move, so that the each of the two cutoff arms (<NUM>) drives the movable blade (<NUM>) to get close to a respective one of the two fixed blades (<NUM>), and the movable blade (<NUM>) cooperates with the respective one of the two fixed blades (<NUM>) to cut off the truss footing (<NUM>).