KR100633035B1 - Hopper covering device for ready mixed concrete truck - Google Patents

Abstract

Provided is a hopper door operating apparatus for a ready mixed concrete truck which is operated so as not to cause the interference in the peripheral devices when concrete is input into the hopper. The hopper door operating apparatus(100) for a ready mixed concrete truck comprises: a pair of guide rails(110), horizontally fixed respectively to both sides of a hopper so that they are arranged in parallel with each other in a forward and backward direction of the hopper; a pair of cylinders(120), arranged along the guide rails(110) respectively; a cover(130), connected with a piston of the cylinders(120), and slid in a forward or backward direction of the hopper so as to open or close the hopper; and a cover supporting unit(140), fixed to both sides of the cover(130) so as to be moved along the guide rails(110).

Description

Hopper covering device for ready mixed concrete truck

1 is a perspective view of a state of use showing a hopper opening and closing device of a conventional ready-mixed concrete mixer truck.

Figure 2 is a side view of the hopper opening and closing device of a conventional ready-mixed concrete mixer truck.

Figure 3 is a perspective view of the hopper opening and closing device of the ready-mixed concrete mixer truck according to the present invention.

4 is a cross-sectional view taken along line IV-IV of FIG. 3.

5a and 5b are plan views showing the hopper opening and closing device operating state of the ready-mixed concrete mixer truck according to the present invention, respectively.

<Explanation of symbols for the main parts of the drawings>

Hopper opening 110 Guiding rails

120 ... cylinder 121 ... piston

130 Cover 140 Cover support means

Fixed bracket 142 Roller

150 ... Connection bar 151 ... Connection

H ... hopper

The present invention relates to a hopper opening and closing device of the ready-mixed mixer truck to be installed on the hopper which is the concrete injection means of the ready-mixed mixer truck to prevent the inflow of rain water or foreign matter.

In general, a ready-mixed concrete mixer truck is a vehicle manufactured by injecting raw concrete into a mixer drum to be discharged after transporting it to a work place while combining it at a constant concentration.

The raw concrete is injected through the hopper, and the injected raw concrete is combined at a constant concentration by the mixer drum, and then discharged through a semi-circular cross-section chute installed at the bottom of the mixer drum.

However, the hopper of the concrete mixer truck has a problem that the quality of the concrete is deteriorated because a large number of foreign substances such as dust or rain water flows from the outside through the hopper during the operation of the concrete mixer truck.

Because of the above problems, it is known that disclosed in the Korean Utility Model Registration No. 310854 as a hopper opening and closing device of the concrete mixer truck proposed by the present applicant.

As shown in Figure 1, the hopper opening and closing device is supported so that both ends of the frame 10 installed between the mixer drum (D) and the hopper (H), the fixing bracket 11 and the bearing on the frame (10) The cover 30 and the cover 30 for opening and closing the hopper (H) while being rotated back and forth around the rotating shaft 20 while the rotary shaft 20 and the one end is integrally coupled to the rotary shaft 20 is installed. Is installed on one side of the rotating shaft 20 and the cover 30 is composed of a motor for rotating and opening and closing operation.

According to the hopper opening and closing device, the cover 30 installed on the upper portion of the hopper (H) blocks the hopper (H) so that foreign matter does not flow into the hopper (H) in normal times, and when the inflow of concrete It is operated to open the hopper H while automatically turning about the rotation shaft 20 by driving.

However, in the conventional hopper opening and closing device as described above, the cover 30 is operated to open while pivoting to the upper portion of the hopper (H), as shown in Figure 2, to inject concrete into the hopper (H) In order to bring the ready-mixed concrete mixer truck closer to the concrete injector with the cover 30 open, a problem occurs that the concrete injectors disposed on the cover 30 and the hopper H interfere with each other.

When the concrete injection device and the cover 30 interfere with each other, the cover 30 may be damaged and thus the opening and closing operation may not be performed smoothly, and the cover 30 may be crushed or bent to prevent the hopper H from completely closing the inlet. Therefore, foreign matter is introduced into the gap between the hopper (H) and the cover 30, which brings about the deterioration of the quality of the concrete.

In addition, the concrete injection device may also cause damage, and in severe cases, the concrete injection operation may be stopped.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a hopper opening and closing device of a ready-mixed concrete mixer truck that is operated so that interference with peripheral devices does not occur when concrete is injected.

In order to achieve the above object, the present invention provides a pair of guide rails horizontally fixed on both sides of the hopper so as to be parallel to each other in the front and rear direction of the hopper, a pair of cylinders provided along the guide rail, the piston of the cylinder It is connected to the cover to open and close the hopper while slidingly moving in the front and rear direction of the hopper, characterized in that it comprises a cover support means fixed to both sides of the cover to be movable along the guide rail.

The cover support means may be composed of a fixed bracket fixed to the side of the cover, and a roller connected to the fixed bracket is installed so as to be movable in the guide rail.

In addition, the cover and the piston of each cylinder is connected to each other through a connecting bar which is connected to the piston of the cylinder, respectively, and a connecting piece fixed to the connecting bar is formed from one end of the cover.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

As shown in Figure 3 to 4, the hopper opening and closing device 100 of the ready-mixed concrete mixer truck of the present invention is a pair fixed horizontally on both sides of the hopper (H) so as to be parallel to each other in the front and rear direction of the hopper (H) Guide rails 110, a pair of cylinders 120 installed along the guide rails 110, and the piston 121 of the cylinder 120 is slidingly moved in the front and rear direction of the hopper (H) It includes a cover 130 for opening and closing the hopper (H), and cover support means 140 fixed to both sides of the cover 130 to be movable along the guide rail (110).

The guide rail 110 is installed between the mixer drum (D) and the hopper (H), the bracket 111 for connecting the side of the hopper (H) and the guide rail to be parallel to each other in a horizontal state on both sides of the hopper (H) ) Is firmly fixed by bolts or welding.

The cylinder 120 is installed to the outside of the guide rail 110. The cylinder 120 is also disposed parallel to each other in the front and rear direction of the hopper (H) along the guide rail (110).

The cover 130 is connected to the piston 121 of the cylinder 120 to open and close the hopper H while slidingly moving forward and backward of the hopper H. Connection between the cover 130 and the piston 121 of the cylinder 120 is formed so that both ends protrude from one end of the cover 130 and the connection bar 150 connected to the piston 121 of the cylinder 120, respectively. Is made through a connecting piece 151 fixed to the connecting bar 150.

In addition, cover support means 140 may be smoothly slid along the guide rail 110 while preventing excessive load from being applied to the connecting piece 151 by the weight of the cover 130 on both sides of the cover 130. ) Is provided.

The cover support means 140 is a fixed bracket 141 fixed to the side of the cover 130, the roller is installed in the guide rail 110 to be movable in the roller 142 connected to the fixed bracket 141 It is composed. At this time, the installation position and the number of the cover support means 140 may be freely deformed, in this embodiment, for example, installed in two places on both sides of the front of the cover 130.

On the other hand, the cylinder 120 is preferably set so that the withdrawal section of the piston 121 is limited to the extent that the cover 130 can fully open the hopper (H), if the setting is not made, the guide By installing a limit switch (not shown) on one side of the rail 110 to detect the specific position of the roller 142 to reciprocate the inside of the guide rail 110, withdrawal operation of the piston 121 of the cylinder 120 is further A separate safety device may be further installed to restrict it from doing so.

For example, when the limit switch is installed at the position of the roller 142 with the cover 130 fully open, the limit switch detects the roller 142 at a time when the cover 130 completely opens the hopper H. At this moment, the cylinder 120 stops the piston 121 withdrawal operation, so that the cover 130 can perform the opening and closing operation stably only within a certain section.

On the other hand, a switch (not shown) for driving the cylinder 120 may be located anywhere, such as a driver's seat or a hopper (H) side for easy operation.

Referring to Figure 5 describes the operation of the hopper (H) opening and closing device 100 of the present invention configured as described above are as follows.

First, as shown in FIG. 5A, in the initial state in which the cover 130 covers the hopper H, in order to open the cover 130 covering the hopper H, the hopper is operated by operating a switch installed at one side. (H) The cylinders 120 on both sides pull out the piston 121.

When the piston 121 of the cylinder 120 is withdrawn to the front of the hopper (H), the connecting bar 150 moves in front of the hopper (H) along the withdrawn piston (121). When the connecting bar 150 moves to the front of the hopper H, the cover 130 connected to the connecting bar 150 through the connecting piece 151 also moves to the front of the hopper (H). In this process, the cover 130 is slidably moved forward of the hopper H along the guide rail 110 through the cover support means 140 fixed to both sides and the hopper H is opened.

In this case, since the cover 130 is supported by the guide rail 110 through the cover support means 140, the cover 130 may be slid and moved smoothly along the guide rail 110 during opening and closing operation of the hopper H. No excessive load is applied to the connecting piece 151.

The cylinder 120 is stopped when the piston 121 is drawn out by a predetermined distance, the hopper (H) is in a fully open state, as shown in Figure 5b.

On the other hand, when the limit switch for detecting the position of the roller 142 is installed on the guide rail 110, the limit switch detects the position of the roller 142 at the moment when the cover 130 is fully opened, By blocking the operation, the cover 130 is excessively moved to prevent the guide rail 110 from being separated.

Subsequently, in order to close the opened hopper H, the cylinder 120 on both sides of the hopper H may simply operate the switch in such a manner as to draw in the piston 121. In this case, the cover 130 slides backward along the guide rail 110 to close the hopper H. When the hopper H is completely closed, the operation of the cylinder 120 is stopped.

According to the hopper opening and closing device of the ready-mixed concrete mixer truck of the present invention as described above, since the cover installed on the upper side of the hopper slides the hopper forward and backward along the cylinders installed on both sides of the hopper, the cover is opened as in the prior art. Protruding to the top of the hopper does not open, there is an effect that can prevent the cover and the concrete injector interfere with each other.

While the invention has been shown and described with respect to specific embodiments thereof, it will be understood that the invention can be variously modified and varied without departing from the spirit or scope of the invention as set forth in the claims below. It should be included in the scope of the invention.

Claims (3)

A pair of guide rails horizontally fixed to both sides of the hopper so as to be parallel to each other in the forward and backward directions of the hopper, A pair of cylinders installed along the guide rail, A cover connected to the piston of the cylinder to open and close the hopper while slidingly moving forward and backward in the hopper; And a cover support means fixed to both sides of the cover to be movable along the guide rail. The method of claim 1, The cover support means Fixing bracket fixed to the side of the cover, the hopper opening and closing device of the ready-mixed mixer truck, characterized in that the roller is connected to the fixed bracket is installed so as to be movable in the guide rail. The method of claim 1, The cover and the pistons of each cylinder The hopper opening and closing device of the ready-mixed mixer truck, characterized in that both ends are connected to each other via a connecting bar connected to the piston of each cylinder, and one end of the cover is fixed to the connecting bar.

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