KR100620965B1 - Automated grease feeding apparatus for conveyor system - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic grease injection device for a conveyor, and more particularly to a trolley adapted to engage a rail track at a predetermined position in a conveyor system such as a trolley conveyor including a rail track on which a plurality of trolley assemblies are supported and transported. The present invention relates to a device for automatically injecting grease into a bearing of an autoclave. The apparatus includes a plurality of valves for driving a grease injection unit using compressed air and a driving body configured to selectively open and close the plurality of valves. The structure of the grease injection device is disclosed, and according to this structural feature, proper grease injection to the bearing can be carried out in accordance with the movement of the bearing in the conveyor.

Conveyor, Grease, Bearing, Rail Track, Valve, Compressed Air

Description

Automatic grease feeding apparatus for conveyors {Automated grease feeding apparatus for conveyor system}

1 is a schematic perspective view showing an example of a conventional automatic grease injection apparatus;

2 is a schematic perspective view showing an automatic grease injection device according to a first embodiment of the present invention;

3 is an exploded perspective view of FIG. 2;

4 is a bottom view of the grease injection unit and the guide unit as a center;

5 is an exploded perspective view showing the driving body in a center;

6 is a graph showing the opening and closing states of the first to third valves according to the transfer position of the drive body (projection);

7 is a configuration diagram showing a compressed air engine connecting a plurality of valves and a grease injection unit;

8 is a block diagram showing an automatic grease injection apparatus centered on a delivery path of compressed air;

FIG. 9 is a schematic perspective view of a lower body having a guide rail of a deformed form in an automatic grease injection device according to a second embodiment of the present invention; FIG.

10 is an exploded perspective view of a drive body operating in correspondence with the guide rail of FIG. 9; And

FIG. 11 is a schematic perspective view showing a part of an automatic grease injection apparatus having a structure for varying a position of a valve according to a third embodiment of the present invention. FIG.

<Description of Symbols for Main Parts of Drawings>

110: lower body 112: guide rail

120: drive body 122, 122a, 122b: protrusion

124a: top plate 124b: bottom plate

124c: guide hole 126: connecting plate

126a: projection 128: groove

130: grease injection unit 132: guide unit

134: nozzle portion 136: connection portion

140: upper body 142: guide bar

150: control unit 152: controller

154: sensor portion 162, 164, 166, 168: valve

162a, 164a, 166a: lower 170: return cylinder

180: compressed air 182: grease piping

200: automatic grease supply

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic grease injection device for a conveyor, and more particularly to a trolley adapted to engage a rail track at a predetermined position in a conveyor system such as a trolley conveyor including a rail track on which a plurality of trolley assemblies are supported and transported. A device for automatically injecting grease into bearings.

In general, the automatic grease injection device is a device that automatically injects grease to bearings and bushings that are coupled to a point of the conveyor, and the conveyor moves by smoothly rotating bearings that are supported and transported in the conveyor. It is a device that prevents the surging (surging) that may appear at the time, reduce the wear of the bearings, and further reduces the driving force for driving the conveyor.

1 is a schematic perspective view showing an automatic grease injection apparatus according to a conventional example, and briefly describes a structure of a conventional automatic grease injection apparatus with reference to the following.

Conventional automatic grease injection apparatus 100 is divided into a large body 10 and a pair of guides 20 arranged in parallel along both sides of the body 10 are coupled in a predetermined position on the rail track of the conveyor. And a pair of grease injection portions 30 reciprocally driven along the guide 20 in the longitudinal direction, and a guide portion 32 and a nozzle arranged in parallel from the lower end of each grease injection portion 30 toward the rail track. The unit 34 and the control unit 40 for controlling the operation of the guide unit 32 and the nozzle unit 34 is configured.

In FIG. 1, the controller 40 includes three valves 42, 44, 46, and a controller 48, and is coupled to an upper surface of the body 10 to detect a position of a bearing in a rail track. 50) to control the injection of grease. In addition, each of the three valves 42, 44, and 46 is a solenoid air valve, and compressed air injected from one side 12 of the body 10 is transferred to the nozzle unit 34 of the grease injection unit 30, and the like. By opening and closing a pipe (for example, a compressed air engine (not shown)), the operation of the nozzle unit 34 or the like by the compressed air can be controlled. In addition, although not shown in the drawings, it is obvious that the nozzle 34 of the grease injection unit 30 is connected to a grease supply unit such as a pump formed outside to receive grease.

In the conventional automatic grease injection device having such a structure, the sensor unit 50 basically detects the position of the bearing to be supported and transported in the rail track, and by using the result, the controller 48 has a predetermined time interval set in advance. By opening and closing the three valves 42, 44, 46, the guide portion 32 and the nozzle portion 34 of the grease injection portion 30 are operated.

Conventional guide portion 32 and nozzle portion 34 are each composed of a compressed air cylinder, it can be configured to move forward / backward toward the rail track by the compressed air delivered from the valve.

This conventional automatic grease injection apparatus has an advantage in that grease can be automatically injected toward a bearing that is supported and transported in a rail track of a conveyor, but has the following problems.

Specifically, since the conventional automatic grease injection device is basically driven based on the detection result of the sensor unit for detecting the position of the bearing in the rail track, 1) when the feed speed of the bearing is high, 2) bearing or bushing, etc. If the arrangement of is not constant, 3) when the position of the bearing or bushing, etc. are different, and 4) when the gap between the bearings is narrow, it was difficult to use.

For example, if the speed of the conveyor is too fast or the position of the bearing or the like is not correct, there is no device for automatically separating the grease injection unit when the grease injection unit is operated over a certain distance, so that the grease injection unit, for example, the guide unit And damage to the nozzle portion and the like.

In addition, when the arrangement of the bearings and the like is different, the automatic sensing of grease is required because the sensor unit needs to individually determine the positions of the bearings and the like to operate the guide unit and the nozzle unit of the grease injection unit individually and return the grease injection unit to its initial position. The structure of the device becomes complicated and can cause difficulty in maintenance such as maintenance of the device.

In order to solve these problems, the present invention provides an automatic grease injection device for a conveyor, characterized in that the injection of grease is carried out in accordance with the transfer position of the grease injection portion which is conveyed in engagement with the movement of the bearing in the rail track.

In addition, the present invention provides a device that can prevent damage to the nozzle portion and the guide portion by applying a structure that can forcibly retract the nozzle portion and the guide portion in case of malfunction.

The present invention also provides an automatic grease injection device for a conveyor having a structure that can be applied to a plurality of conveyors regardless of the arrangement of bearings.

In order to achieve these objects, a first embodiment of the present invention is an automatic grease injection device for a conveyor, in which a plurality of trolley assemblies are supported and moving along a rail track, the lower body being coupled to the top of the rail track at a predetermined position. ; A drive body reciprocating along a guide rail in the lower body; Grease injection portions coupled to both sides of the drive body and for injecting grease from both sides of the rail track toward the bearings in the rail track; An upper body coupled with the lower body at an interval including an area in which the driving body reciprocates; And a control unit formed on an upper surface of the upper body and controlling the operation of the grease injection unit in response to the reciprocating movement of the driving body, wherein the grease injection unit is engaged with the movement of the bearing in the rail track and is transferred. An automatic grease injection device for a conveyor is provided, characterized in that the injection is carried out.

According to the present invention, the grease injection portion includes a guide portion engaged with a bearing carried along a rail track; A nozzle portion formed in parallel with the guide portion at the rear side in the conveying direction; And a connection part for coupling the combination of the guide part and the nozzle part with the driving body.

In addition, in the present invention, the control unit includes a plurality of valves arranged in a predetermined position to operate the nozzle unit, the drive body includes a projection formed to selectively open and close the plurality of valves, and the transfer position of the grease injection unit As a result of the transfer of the driving body, a plurality of valves are selectively opened and closed so that grease is injected from the nozzle part toward the bearing.

In addition, in the present invention, the plurality of valves are one solenoid air valve and three roller valves connected to the protrusions of the driving body to open and close, and are connected through the nozzle portion of the grease injection unit and the compressed air engine, and the valves are moved according to the transfer of the driving body. A first valve for controlling the movement of the field; A second valve formed at a predetermined distance from the first valve along the conveying direction of the drive body and configured to retract the guide part and the nozzle part; And a third valve formed at a position parallel to the first and second valves and advancing the guide portion and the nozzle portion and injecting grease into the bearing.

In addition, in the present invention, a return cylinder for returning the drive body to the initial position is formed on one side of the drive body, the return cylinder is characterized in that it drives with the opening of the second valve.

In addition, according to the second embodiment of the present invention, the guide rails of the lower body are formed in pairs and gradually open from a position where the second valve is formed so that the guide part and the nozzle part are forced even when the second valve malfunctions. By retreating, it is characterized by preventing damage to the guide portion and the nozzle portion.

In addition, according to the third embodiment of the present invention, the second valve is formed corresponding to any point of the section from the position where the first valve is formed to the position where the pair of guide rails are opened, thereby reducing the range of the section where grease is injected. It can be set freely.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

For reference, in order to easily understand the technical contents of the present specification, some components such as, for example, compressed air engines have been described through specific drawings (eg, FIG. 7), and other drawings are not shown.

FIG. 2 is a schematic perspective view showing an automatic grease injection device according to a first embodiment of the present invention, and FIG. 3 is an exploded perspective view of FIG. Referring to Figures 2 and 3 will be described the structure of the automatic grease injection apparatus 200 for conveyors according to the first embodiment of the present invention.

The automatic grease injection apparatus 200 according to the first embodiment of the present invention reciprocates along the lower body 110 and the guide rail 112 in the lower body, which are coupled to the upper rail track 210 of the conveyor at a predetermined position. A drive body 120 to be driven, a grease injection unit 130 coupled to both sides of the drive body and injecting grease toward bearings 220 at both sides of the rail track, and a region in which the drive body is driven; An upper body 140 coupled to the lower body at intervals, and a control unit 150 is formed on the upper surface of the upper body and controls the operation of the grease injection unit in response to the reciprocating movement of the drive body.

In addition, the automatic grease injection device 200 according to the present invention is coupled to the sensor unit 154 for detecting the position of the bearing, the inner side of the upper body 140 to drive the drive body 120 under the control of the controller 150. A return cylinder 170 to return to the initial position, and a grease supply (not shown), such as a pump for supplying grease to the nozzle portion 134 of the grease injection portion 130 from the outside of the device.

The control unit 150 includes a plurality of valves 162, 164, 166, and 168 and a controller 152, for example, a grease injection unit by being connected through a grease injection unit 130 and a compressed air engine (see FIG. 7). The guide unit 132 and the nozzle unit 134 of the 130 may be controlled. Specifically, the valves of the present invention are a solenoid air-valve and three roller valves, each valve being selectively opened and closed to deliver compressed air supplied from the outside to guide towards the bearings in the rail track. The forward / retract action of the unit 132 and the nozzle unit 134 may be controlled. In an embodiment of the present invention, opening and closing of these valves, such as the first valve 162, the second valve 164, and the third valve 166, is carried out through the controller 152 or driven in accordance with the movement of the bearing. It may be implemented by the movement of the drive body 120 is.

For example, the automatic grease injection apparatus according to the embodiment of the present invention can operate as follows.

The guide part 132 is engaged with the front side of the bearing in the rail track based on the traveling direction A of the conveyor, and is transferred together, and the protrusion 122 of the drive body is transferred while the driving body 120 to which the guide part 132 is coupled is transferred. ) Is engaged with the lower ends 162a, 164a and 166a of the plurality of valves 162, 164, and 166 coupled to the upper body 140 to selectively open and close the valves. As the plurality of valves 162, 164, and 166 are selectively opened and closed, the nozzle portion 134 of the grease injection portion 130 connected through the valves and the compression air pipe is advanced toward the bearing to inject grease into the bearing. do. For example, when the protrusion 122 of the drive body continuously moving while injecting grease comes into contact with the second valve 164, the injection of grease is stopped and the guide part 132 and the nozzle part 134 retreat and return. By the action of the cylinder 170, the drive body 120 is returned to the initial position with the grease injection unit 130.

As such, the automatic grease injection device according to the present invention forms a projection on the surface of the drive body in direct contact with a plurality of valves controlling the operation of the grease injection portion, and also moves the bearing while the drive body is engaged with the grease injection portion. It is characterized in that the grease injection is carried out in direct response to the movement of the bearing as a result of being meshed with.

Through this, unlike the configuration in which grease is injected for a predetermined time interval in the conventional grease injection device, it is possible to provide an automatic grease injection device in which grease is injected more closely related to the movement of the bearing. That is, the present invention smoothly performs the injection of grease to the bearing by engaging the movement of the bearing to selectively open and close the plurality of valves by using the drive body, and at the same time apply regardless of the difference in the form, type and arrangement of the bearing It is to provide an automatic grease injection device.

4 is a bottom view of the guide part 132 and the nozzle part 134 of the grease injection part 130 according to the present invention. Referring to Figure 4, the driving principle of the grease injection unit 130 according to the present invention will be described.

The driving body 120 is driven in combination with a pair of guide bars 142 arranged on both sides of the lower body 110, and guides through a connecting portion 136 extending from both sides of the driving body 120. The combination of the part 132 and the nozzle part 134 may be driven in the traveling direction A of the conveyor.

The guide parts 132 and the nozzle parts 134 are arranged in the order of the conveyor direction, and the guide parts 132 and the nozzle parts 134 are cylinders 132a and 134a driven using compressed air, respectively. ). The cylinders 132a and 134a move forward / reverse toward the bearing 220 in the rail track 210 by the pressure of the compressed air, and a nozzle 134b is formed at the end of the cylinder 134a of the nozzle portion, whereby grease is applied. Configured to be injected. For this purpose, it is obvious that the nozzle unit 134 is connected to the grease supply unit (not shown) described above, and grease is supplied from the grease supply unit.

On the other hand, the cylinder 132a of the guide portion 132 is advanced and placed in front of the bearing 220 in the traveling direction of the conveyor, and because the bearing is engaged with the cylinder 132a of the guide portion when the bearing is transported in the rail track, As a result, the drive body 120 to which the guide part 132 is connected may be driven together in the direction A of movement of the conveyor in accordance with the movement of the bearing.

In more detail, the grease injection unit 130 of the present invention is engaged with the bearing 220 in a state where the cylinder 132a of the guide unit 132 is advanced, and is transferred in the advancing direction of the conveyor, and the grease injection unit 130 is provided. ) Is transferred, the driving body 120 connected with the grease injection unit is transferred together, and the plurality of valves 162, 164, and 166 corresponding to the driving body 120 are transferred in the process of transferring the driving body 120. 2), the cylinder 134a of the nozzle portion 134 is advanced, and grease is injected into the bearing 220 through the nozzle 134b at the end of the cylinder. Subsequently, when the driving body 120 continuously advances and contacts a specific valve (eg, the second valve 164), the cylinders 132a and 132b of the guide part and the nozzle part retreat, and then the initial position (eg, The right position of FIG. 4). Thereafter, the above operation may be repeatedly performed to automatically inject grease into the bearings in the conveyor.

Next, FIG. 5 is an exploded perspective view of the driving body, and FIG. 6 is a graph showing the opening and closing states of the first to third valves 162, 164, and 166 according to the transfer position of the driving body (protrusion). to be. The process of opening and closing a plurality of valves using the driving body 120 will be described in detail with reference to this.

The drive body 120 of the present invention is driven along the guide bar 142 of the upper body 140 in the direction of travel of the conveyor, in contact with the plurality of valves 162, 164, 166 in the process of being driven these valves By opening and closing them, the grease injection unit is operated.

In particular, the drive body 120 includes a pair of protrusions 122 formed on the top surface of the drive body 120 differently from each other, and a pair of protrusions 122 are provided at the lower end of the plurality of valves in the process of transferring the drive body 120. Each valve can be opened and closed by contacting and pushing up. For example, in a state where the driving body 120 is placed at an initial position (for example, the rear side in the traveling direction of the conveyor), the protrusion 122a is lowered 162a of the first valve 162 while the driving body is driven according to the movement of the bearing. The first valve is opened by pushing the lower end in contact with), and then another third protrusion 122b placed in parallel opens the third valve by pushing the lower end in contact with the lower end 166a of the third valve 166. Afterwards, the protrusion 122a which opens the first valve contacts the lower end 164a of the second valve 164 and pushes up the lower end to follow the procedure of opening the second valve.

As such, the valves are selectively opened in accordance with the movement of the drive body, so that compressed air is transferred to the grease injection unit through the valve and grease injection operation can be performed. For example, when the first valve 162 is opened, the opening and closing of the compressed air in the apparatus and the delivery direction of the compressed air between the valves are controlled, and when the second valve 164 is opened, the reverse operation of the nozzle part and the guide part is performed. Controls the reverse operation of the return cylinder 170-the return to the initial position of the drive body 120-and controls the forward operation of the nozzle portion and the injection of grease through the nozzle when the third valve 166 is opened Can be.

An example in which multiple valves (first to third valves) operate sequentially based on the transfer position of the drive body is shown graphically in FIG. 6. As shown in FIG. 6, the process of starting the case where the drive body is in the initial position and opening the first valve momentarily, then opening the third valve for any period and finally opening the second valve is repeated. It can be seen. As such, the drive body is reciprocally conveyed in accordance with the movement of the bearing, so that a plurality of valves are repeatedly opened and closed, and thus, the injection of grease into the bearings in the conveyor can be naturally performed.

Next, FIG. 7 is a block diagram illustrating a compressed air engine connecting a plurality of valves and a grease injection unit, and FIG. 8 is a block diagram illustrating an automatic grease injection device centered on a delivery path of compressed air.

As described above, in describing the present invention, the compressed air engine, which is a passage through which compressed air is delivered, has been omitted for simplification of the drawings and will be briefly described below.

As shown in FIG. 7 and FIG. 8, the compressed air includes a plurality of valves 162, 164, 166 and 168, a return cylinder 170, a guide part 132 of the grease injection part, a nozzle part 134, and the like. It is transmitted through the compressed air pipe 180 is connected to each other. In addition, these valves 162, 164, 166, and 168 are similar to the block diagram schematically shown in FIG. 8, respectively, using compressed air, respectively, the guide portion 132 and the nozzle portion 134 of the return cylinder 170 and the grease injection portion. ) Can be activated. In addition, grease supplied from a grease supply such as a pump may be delivered to the nozzle 134b of the nozzle portion 134 through a separate pipe 182 and then injected into the bearing. Opening and closing of these valves can be controlled by the sensor unit 154 and the controller 152 to detect the current position of the bearing.

FIG. 9 is a schematic perspective view of a lower body in which a guide rail of a deformed form is formed in an automatic grease injection apparatus according to a second embodiment of the present invention, and FIG. 10 is a drive that operates corresponding to the guide rail of FIG. 9. An exploded perspective view of the body.

The automatic grease injection device 200a according to the second embodiment of the present invention is characterized in that the grease injection unit 130 is automatically retracted even when a malfunction of the valve occurs due to the deformation of the guide rail 112 '. do.

As shown in FIG. 9, the guide rails 112 ′ of the lower body 110 ′ are progressively from a predetermined position, for example, a position corresponding to the second valve 164, rather than a conventional pair of parallel straight lines. It is formed to open.

In addition, the corresponding drive body 120 'may also be assembled as follows. That is, the driving body 120 ′ is connected between the upper plate 124a and the lower plate 124b coupled to the upper plate 124a and the upper plate and the lower plate protruding from the left and right protrusions 122 to the surface 122. ) And assembled. In addition, a guide hole 124c into which the guide bar 142 of the upper body 140 is fitted is formed below the lower plate 124b.

At this time, the connecting plate 126 may be moved forward / backward along the groove 128 formed in the lower plate 124b, and since the connecting plate 126 is coupled to the connecting portion 136 of the grease injection unit 130. The grease injection unit 130 itself may be advanced / retracted. That is, regardless of opening and closing of the valve, the driving body 120 'is driven along the guide rail 112' of the lower body 110 'and the connecting plate 126 of the driving body 120' is opened at the position where the guide rail opens. The left and right openings may retract the pair of grease injection units 130 coupled thereto to move away from each other.

This is due to the structure of the deformed guide rail 112 ′ and the corresponding drive body 120 ′ in case the valve malfunctions, eg due to a malfunction of the second valve 164, so that the drive body does not automatically return. By utilizing this, the grease injection unit can be automatically retracted to prevent breakage of the grease injection unit.

In addition, it is preferable to return the drive body to the initial position by setting the return cylinder to operate at the same time as the grease injection unit retracts.

Next, FIG. 11 is a schematic perspective view partially showing an automatic grease injection apparatus having a structure for varying a position of a valve according to a third embodiment of the present invention.

According to FIG. 11, the grease injection device according to the third embodiment of the present invention is characterized in that the upper body to which the plurality of valves 162, 164, and 166 is fastened is deformed.

In the present invention, the plurality of valves 162, 164, and 166 protrude from the lower ends 162a, 164a, and 166a through the plurality of fastening holes 144a, 144b, and 144c respectively formed in the upper body 140 ′. It is fastened so as to open and close the valve by contacting the protruding lower end of the driving body. At this time, by forming the form of the fastening hole 144b to which the second valve 164 is fastened to a long hole extending in the direction of travel of the conveyor, the position at which the second valve 164 is fastened to a predetermined range (within the length of the long hole) Can be freely changed to any place.

Given that the role of the second valve 164 is to return the drive body to the initial position after terminating the grease injection, changing the position of the second valve may result in adjusting the amount of grease injected into the bearing. Means. In addition, as in the third embodiment of the present invention, by using the fastening hole 144b having a long hole shape to fasten the second valve 164 within a predetermined range, the automatic grease injection device including the bearing of various shapes and arrangements It can be applied to a conveyor equipped with.

The automatic grease injection device for conveyors as described above can solve the conventional problems in the following aspects.

Basically, since the automatic grease injection apparatus according to the present invention can proceed the grease injection operation in accordance with the movement of the bearing, efficient grease injection can be performed. For example, the movement of the bearing is connected through a guide relationship between the guide portion of the grease injection portion engaged with the bearing, the drive body coupled with the grease injection portion, and the plurality of valves opened and closed by a protrusion formed on the upper surface of the drive body. Appropriate grease injection can be effected by transferring to a plurality of valves directly controlling the operation of the grease injection section.

In addition, when the speed of the conveyor is too fast or the position of the bearing or the like is not correct, the guide rail of the modified form as in the second embodiment of the present invention when the grease injection unit is operated over a certain distance and corresponding thereto By providing a coupling structure of the drive body, it can be automatically separated from the rail track by retracting the grease injection part when the grease injection part (i.e. the drive body) proceeds over a certain distance. And the like can be prevented from being damaged.

On the other hand, according to the embodiment of the present invention, but only the structure of the grease injection unit consisting of one guide portion and one nozzle portion is disclosed, in contrast, the grease injection portion consisting of one guide portion and two nozzle portions (not shown) It is obvious that the automatic grease injection apparatus including) may also be applied to the present invention. For example, when the dog is applied to the trolley assembly, when the gap between the continuous bearings is very short or the feed speed of the bearings is too fast, two nozzle portions provided at regular intervals may be formed in the grease injection portion. That is, in this case, since a pair of grease injection portions having two nozzle portions are formed left and right, as a result, a structure having four nozzle portions can be presented.

It is also possible to avoid the conventional complicated structure by adjusting the position of any one of the valves, e.g., the second valve which terminates the grease injection and returns the drive body to the initial position if the arrangement of the bearings or the like is different. This can bring convenience of maintenance such as maintenance of the device.

The automatic grease injection apparatus according to the present invention provides a plurality of valves for driving the grease injection unit using compressed air and a driving body configured to selectively open and close the plurality of valves, and accordingly to the movement of the bearing in the conveyor. Appropriate grease injection to the bearing can be carried out.

Claims (7)

An automatic grease injection device for conveyors, in which a plurality of trolley assemblies are supported and move along rail tracks, A lower body coupled to an upper portion of the rail track at a predetermined position; A drive body reciprocating along a guide rail in the lower body; Grease injection portions coupled to both sides of the driving body and injecting greases from both sides of the rail track toward a bearing in the rail track; An upper body coupled with the lower body at an interval including an area in which the driving body reciprocates; And A control unit formed on an upper surface of the upper body and controlling an operation of the grease injection unit in response to a reciprocating movement of the driving body; And grease injection based on a position where the grease injection unit is engaged with the movement of the bearing in the rail track. The method of claim 1, wherein the grease injection portion A guide part engaged with the bearing carried along the rail track; A nozzle portion formed in parallel with the guide portion at a rear side of the conveying direction; And The automatic grease injection device for a conveyor, characterized in that it further comprises a connection for coupling the combination of the guide portion and the nozzle portion with the drive body. The grease of claim 2, wherein the control unit includes a plurality of valves arranged at predetermined positions to operate the nozzle unit, and the driving body includes a protrusion formed to selectively open and close the plurality of valves. And the plurality of valves are selectively opened and closed by transferring the drive body according to the transfer position of the injection unit, and grease is injected from the nozzle unit toward the bearing. 4. The plurality of valves of claim 3, wherein the plurality of valves are one solenoid air valve and three roller valves connected through the nozzle portion of the grease injection unit and the compressed air engine to be opened and engaged with the protrusion of the driving body. Is A first valve controlling the movement of the valves according to the transfer of the drive body; A second valve formed at a predetermined distance from the first valve along the conveying direction of the driving body, and retracting the guide part and the nozzle part; And A third valve formed at a position parallel to the first and second valves, for advancing the guide part and the nozzle part and injecting grease into the bearing; Automatic grease injection device for a conveyor comprising a. The conveyor grease of claim 4, wherein a return cylinder for returning the drive body to an initial position is formed at one side of the drive body, and the return cylinder is driven with the opening of the second valve. Injection device. The guide rails of claim 4, wherein the guide rails of the lower body are formed in pairs and gradually open from a position at which the second valve is formed, thereby forcibly retracting the guide part and the nozzle part even when the second valve malfunctions. Automatic grease injection device for a conveyor, characterized in that. The method of claim 6, wherein the second valve is formed corresponding to any point of the section from the position where the first valve is formed to the position where the pair of guide rails are opened to freely set the range of the section in which grease is injected Automatic grease injection device for a conveyor, characterized in that.

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