JPH031332Y2 - - Google Patents

Description

[Detailed description of the invention] <Field of industrial application> This invention relates to a safety shutter for pusher conveyors that push transport vehicles loaded with workpieces, parts, etc. and run on the floor in a factory. be.

<Prior Art> When transporting workpieces, parts, etc. within a factory, a transport cart that runs on the floor is used. A pusher conveyor is well known as a device for automatically traveling this transport vehicle. As shown in Fig. 4, this pusher conveyor has a groove 2 (pit) dug in the floor 1 that serves as the traveling path of the transport vehicle, a chain that goes around inside the groove 2, and a chain that runs around the floor. A running body 4 equipped with a pusher 3 protruding from the surface 1
The structure is such that the two are connected and moved back and forth along the groove 2.

<Problems to be solved by the invention> In the above-mentioned conventional push shear conveyor, the groove 2 is always open to the floor surface, so workers' feet may get caught or parts etc. may fall into the groove 2. However, there were problems such as hindering the traveling movement of the traveling body.

The present invention provides safety by closing the opening of the groove with a shutter plate parallel to the floor surface when the traveling body is in its original position at one end of the groove, and opening it when the traveling body moves. This project solves the above-mentioned conventional problems by providing a shutter.

<Means for Solving the Problems> The present invention provides a pusher conveyor in which a traveling body moves back and forth along a track in a groove provided in a floor surface. A shutter plate that opens and closes the opening of the shutter is always biased in the opening direction and is movable horizontally, and the shutter plate is operated in the closing direction against the biasing force of the bullet near the original position of the traveling body. A lever is provided, and the traveling body is provided with a dog that comes into contact with the lever only in the original position and moves the shutter plate in the closing direction.

<Operation> In the present invention, when the traveling body is in the original position at one end of the groove, the shutter plate, which is urged in the opening direction by the spring, is moved in the closing direction against the spring force, The opening of the groove is kept closed by a shutter plate, and when the traveling body moves away from its original position, the shutter plate is moved in the opening direction by spring force, allowing the traveling body to move back and forth. It is something.

<Example> An example of the present invention will be described below with reference to FIGS. 1 to 3. The outline of the configuration of the present invention is as shown in FIG. A shutter plate 5 that closes the opening of the groove 2 parallel to the floor surface 1 is automatically opened and closed continuously as the traveling body 4 moves.

A specific structural example of the present invention will be explained with reference to FIGS. 2 and 3. Reference numeral 6 denotes a guide rail provided in the groove 2 for guiding the traveling body 4. A bearing 7 is fixed to the outer surface of the guide rail 6 in the vertical axis direction, and an L-shaped link 9 is fixed to the upper end of a rotating shaft 8 rotatably supported by the bearing 7. One end of this link 9 is pivotally connected to a shutter plate 5 parallel to the floor surface 1, and the other end is pivotally connected to a connecting plate 10.

Further, a rotating shaft 8 near the original position A of the traveling body 4
A lever 11 is fixed to the lower end of the lever 11.
A spring 12 for biasing the shutter plate 5 in the opening direction is latched onto one end, and a roller 13 is pivotally supported at the other end.

The traveling body 4 also has a spring 1 that contacts the roller 13 at the other end of the lever 11, and
A dog 14 is provided that rotates against the tensile force of the shutter plate 2 and operates the shutter plate 5, which is biased in the opening direction, in the closing direction. Reference numeral 15 denotes a spring hooked to one end of the connecting plate 10, which biases the shutter plate 5 in the closing direction, and has a weaker tensile force than the spring 12 which biases the shutter plate 5 in the opening direction.

Next, the operation of the present invention will be explained. 1 to 3 show a state in which the traveling body 4 is retracted to the original position A at one end of the groove 2, and the lever 11
The roller 13 contacts the dog 14 and rotates to position a as shown in FIG. 3, and the link 9 rotates to position b. As a result, the shutter plate 5 moves forward in the direction of arrow c, closing the opening of the groove 2.

When the traveling body 4 moves forward from the original position A, the roller 13 of the lever 11 is disengaged from the dog 14. As a result, the lever 11 is moved to the third position by the tensile force of the spring 12.
Rotate clockwise in the figure to move to position a'. Therefore, the link 9 turns to the b' position and moves the shutter plate 5 backward in the direction of the arrow c' to open the opening of the groove 2 and allow the traveling body 4 to move forward and backward. Incidentally, the connecting plate 10 synchronously interlocks other links 9.

As the traveling body 4 moves forward, the pusher 3 completes the pushing operation and travels backwards. When the traveling body 4 is returned to just before the original position A, the dog 14 comes into contact with the roller 13 of the lever 11 at the a' position, and the lever 11 is moved to the first position. In Figure 3, counterclockwise a is applied against the tensile force of the spring 12.
When the shutter plate 5 is rotated to this position, the shutter plate 5 closes the opening of the groove 2 as shown in the figure.
Therefore, as long as the traveling body 4 is stopped at the original position A, the opening of the groove 2 remains closed by the shutter plate 5.

<Effects of the invention> As described above, the present invention provides a shutter plate that closes the opening of the groove parallel to the floor surface in conjunction with the movement of the running body only when the running body moves within the groove. When the opening of the groove is opened and the traveling body is stopped at the original position at one end of the groove, the opening of the groove is closed by the shutter plate. Problems such as getting stuck or parts falling have been resolved, ensuring safety.

[Brief explanation of drawings]

Figure 1 is a plan view of the present invention, Figure 2 is Figure 1-
3 is a plan view of essential parts of the present invention, and FIG. 4 is a plan view of a conventional structure. 1...Floor surface, 2...Ditch, 3...Pushyah,
4... Traveling body, 5... Shutter plate, 6... Guide rail, 7... Bearing, 8... Rotating shaft, 9... Link, 10... Connection plate, 11... Lever, 12...
...Spring, 13...Roller, 14...Dog.

Claims (1)

[Scope of utility model registration request] In a pusher conveyor in which a running body reciprocates along a track in a groove provided in a floor surface, a shutter plate that opens and closes the opening of the groove parallel to the floor surface is always resiliently moved in the opening direction. A lever is provided in the vicinity of the original position of the traveling body to act in a direction to close the shutter plate against the biasing force of the bullet, and the traveling body is provided with a lever that operates in the direction of closing the shutter plate against the biasing force of the bullet. A safety shutter characterized by having a dog that comes into contact with a lever and moves the shutter plate in the closing direction.