JPS641293Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a greasing device for moving bodies, and is particularly suitable for greasing chain nipples of chain conveyors, trolley conveyors, etc. while the chain is moving. The present invention relates to a suitable greasing device.

(Prior Art) Conventionally, the above-mentioned greasing device for a moving body has been equipped with a bed extending along the movement path of the moving body.
A device is used in which a slide head having a greasing head is supported so as to be able to reciprocate along the movement path, and the movable body is lubricated from the greasing head.

In the above-mentioned device, it is necessary to move the slide head forward in synchronization with the movable body during greasing, and to return the slide head to the initial forward movement position after greasing. As a drive mechanism for the head, for example,
Mention may be made of the device described in No. 7727.
In this device, a return air cylinder is provided between the bed and the slide head, and the return air cylinder is provided with a spring for returning the slide head to the initial forward movement position, and the slide head is further provided with the spring. The structure includes an auxiliary air cylinder that acts in a direction opposite to the return force of the cylinder. In other words, in this device, when the slide head is moved forward in synchronization with the moving body, the force of the spring is offset by the force of the auxiliary air cylinder, thereby smoothly moving the slide head in synchronization with the moving body. When the slide head is returned to the forward movement initial position after greasing is completed, the slide head is driven at high speed by both the force of the air acting on the return air cylinder and the force of the spring. That's why.

(Problem to be solved by the invention) By the way, the above-mentioned greasing device has two parts: an auxiliary air cylinder to offset the force of the spring during forward movement, and a return air cylinder to return the slide head. A cylinder is required, but since two cylinders are required, the structure is complicated and the slide head becomes large.

This invention was made in order to solve the above-mentioned drawbacks of the conventional technology, and its purpose was to be able to perform smooth forward movement and return at high speed in the same way as described above, and to have a simple structure. The object of the present invention is to provide a greasing device for a moving body that can be constructed compactly and inexpensively as a whole.

(Means for solving the problem) Therefore, the greasing device for moving objects of this invention is the fourth one.
As shown in the figure, in a greasing device, a slide head 2 having a greasing head 3 is supported on a bed 1 disposed along a moving path of a movable body A so as to be able to reciprocate along the moving path. A spring 12 is interposed between the bed 1 and the slide head 2 to return the slide head 2 to the forward initial position, and a cylinder 17 is interposed between the bed 1 and the slide head 2. And this cylinder 1
The cylinder 7 has a piston 17a disposed therein so as to be able to slide back and forth, and a rod 18 connected to the piston 17a and led out to the outside of the cylinder 17. The rod 18 is connected to a slide head. 2 side and the cylinder 17 side to the bed 1 side, and the slide head 2 is urged toward the forward initial position by the fluid pressure acting in the cylinder chamber 17b on the rod 18 side. On the other hand, the slide head 2 is biased in the moving direction of the movable body A by the fluid pressure acting in the cylinder chamber 17c on the side opposite to the rod.
The cylinder chamber 17b on the 8 side is connected to the slide head 2.
In any state of reciprocating motion, the fluid supply source 2
2 and cylinder chamber 1 on the anti-rod side.
7c can be switched and connected to the fluid supply source 22 and the fluid discharge side via the switching means 20, and when the cylinder chamber 17c on the side opposite to the rod is connected to the fluid supply source 22, the slide head 2 is moved. Body A
On the other hand, when the cylinder chamber 17c on the side opposite to the rod 18 is connected to the fluid discharge side, the slide head 2 is moved by the force caused by the fluid pressure in the cylinder chamber 17b on the rod 18 side. It is configured to return to the forward movement initial position with the force of the spring 12.

(Function) In the above device, the slide head 2 is the movable body A.
When the piston 17a is moving forward, the force of the spring 12 acts in a direction to prevent this forward movement.At the same time, the cylinder has a pressure-receiving area corresponding to the cross-sectional area of the rod on both sides of the piston 17a. A difference occurs, and the operating force difference caused by this difference pushes the slide head 2 in the forward direction. That is, the force of the spring 12 is relaxed by the difference in force, and the slide head 2 can move smoothly forward.

On the other hand, when the slide head 2 is returned to the forward movement initial position after greasing is completed, the working fluid on the side opposite to the rod is released. Then, the force of the spring 12 and the fluid pressure on the rod side of the cylinder 17 act as a force to return the slide head 2 to the forward initial position.
will return quickly.

With this device, as mentioned above, it is possible to perform the two functions performed by the conventional return air cylinder and auxiliary air cylinder with one cylinder, making the entire system more compact while having the same functions. It becomes possible to configure.

(Example) Next, a specific example of the greasing device for a moving object of this invention will be described in detail with reference to the drawings.

In FIG. 1, 1 indicates a bed, and this bed 1 is assumed to be arranged along a moving body (not shown) such as a chain or a trolley. A slide head 2 is supported on this bed 1 so as to be able to reciprocate along the moving path of the moving body.
This slide head 2 has a pair of greasing heads 3,
4, and a pair of engaging bodies 5 and 6 that engage with a movable body such as the chain described above are respectively attached.

The relationship between the bed 1 and slide head 2 is as follows:
This will be explained based on FIGS. 2 and 3. As shown in the figures, the bed 1 is in the form of an elongated frame that extends along the moving direction of the moving body, and there are support rods between the front and rear walls 7 and 8. 9 have been constructed. A slide head 2 is supported around the support rod 9 via bearings 10 and 11 so as to be slidable in the longitudinal direction of the rod 9. Further, a spring 12 is arranged around the front end side of the support rod 9 to return the slide head 2 to the forward movement initial position (the position shown in FIGS. 2 and 3). This spring 12 constantly presses it in the backward movement direction. An elastic body 13 made of polyurethane rubber or the like is arranged around the support rod 9 on the rear wall 8 side, so as to alleviate the shock that occurs when the slide head 2 returns to its initial position. Further, as shown in FIG. 3, a guide roller 14 is attached to the lower part of the slide head 2.
The slide head 2 is fitted into the guide groove 16 provided in the bottom wall 15 of the bed 1.
Rotation around the rod 9 is prevented. On the other hand, the base of a cylinder 17 extending substantially parallel to the support rod 9 is attached to the rear wall 8 of the bed 1, and the tip of the rod 18 of the cylinder 17 connects to the slide head via a connecting piece 19. It is connected to 2. Note that the spring 12 may be provided outside the cylinder 17 as described above, but
As shown in FIG. 1, it may be provided inside the cylinder 17.

Next, the operating circuit of the above device will be explained based on FIG. In the figure, 22 is an air supply line, and the first mechanically operated valve 20 is connected to this line 22. This first mechanically operated valve 2
0 has the function of supplying and discharging air to each of the following lines. That is, a line 24 connected to the cylinder chamber 17c on the anti-rod side of the cylinder 17 (hereinafter referred to as head side 23), and each head side of the pair of air cylinders 25 and 26 that actuate the pair of engaging bodies 5 and 6. lines 27, 28 connected to the second mechanically operated valve 21, lines 29 connected to the second mechanically operated valve 21, and lines 30a, 30b connected to the rod sides of the air cylinders 25, 26 for the engaging bodies 5, 6. It is. Also, the second
The mechanically operated valve 21 has the function of supplying and discharging air to and from lines 33 and 34 connected to the head sides of air cylinders 31 and 32 that drive the greasing heads 3 and 4, respectively. The first and second mechanically operated valves 20 and 21 are both arranged on the bed 1 side, and the first mechanically operated valve 20 is operated by two cams 35 and 36, and the second mechanically operated valve 20 is operated by two cams 35 and 36. valve 21
are each controlled in position by a cam 37 and a spring 38. It is assumed that each of the cams 35, 36, and 37 is mounted on the slide head 2 side. Also, the cylinder 17 for the slide head 2 is
The cylinder chamber 17b on the rod side (hereinafter referred to as the rod side 39) is directly connected to the air supply line 22 via a line 40, and the rod side 39 is supplied with air from the supply line 22. It is constantly pressurized. On the other hand, a variable throttle valve 4 is connected to a line 24 connected to the head side 23 of the cylinder 17.
A one-way check valve 42 is interposed to provide flow resistance to the air discharged from the head side 23. Note that 43 is a grease supply line through which grease is supplied to the heads 3 and 4.

The operating state of the above-mentioned greasing device will be explained below. First, as shown in FIG. 1, the roller 44 of the first mechanically operated valve 20 contacts the cam 35, and the first mechanically operated valve 20
exists in the state shown, each line 24, 2
Since air is supplied to the cylinders 7 and 28, the cylinder 17 for the slide head 2 and the air cylinders 25 and 26 for the engaging bodies 5 and 6 are both pressurized. At this time, since the rod sides of the air cylinders 25, 26 for the engaging bodies 5, 6 are opened via the lines 30a, 30b, the engaging bodies 5, 6 move forward and engage with a moving body such as a chain. I will do it. When the engaging bodies 5 and 6 engage with the movable body, the movable body attempts to move the slide head 2 forward. At this time, the spring 12 interposed between the bed 1 and the slide head 2 acts to prevent the forward movement. On the other hand, in the cylinder 17 for the slide head 2, the head side 23 is pressurized as described above.
At the same time, the rod side 39 is also pressurized via the line 40. That is, the rod 18 of the cylinder 17 has a head side 23.
A differential pressure between the rod side 39 and the rod side 39 acts, and this force presses the slide head 2 in the forward direction. As a result, the blocking force exerted by the spring 12 is relieved by the differential pressure of the cylinder 17, and the slide head 2 is smoothly moved forward by the movable body.

It should be noted here that in order to prevent the slide head 2 from spontaneously moving due to the differential pressure before the engaging bodies 5 and 6 engage with the movable body, the force of the spring 12 must be This means that it is necessary to make it larger than the above differential pressure,
On the other hand, in order to sufficiently alleviate the blocking force exerted by the spring 12 during the movement of the slide head 2, it is preferable that the force of the spring 12 be made sufficiently close to the differential pressure.

When the slide head 2 moves further and the cam 37 contacts the roller 45 of the second mechanically operated valve 21, the operated valve 21 is located at the switching position and the air in the air supply line 22 is transferred to the line 29 and the line 33. , 34 to the respective air cylinders 31, 32 of the greasing heads 3, 4.
At the same time, the moving body is supplied with grease from the grease supply line 43. Next, slide head 2
When the second mechanically operated valve 21 moves forward further, the roller 45 of the second mechanically operated valve 21 separates from the cam 37, and the force of the spring 38 causes the operated valve 21 to return to its initial position. The head side of each air cylinder 31, 32 for heads 3, 4 is opened to the atmosphere, and each greasing head 3, 4 is connected to cylinder 31, 3.
2 is returned to its original position by the force of springs 46 and 47 installed therein.

When the slide head 2 further moves forward from this state and the other roller 48 of the first mechanically operated valve 20 comes into contact with the cam 36, the first mechanically operated valve 20
0 is placed in the switching position by this cam 36, opening each line 24, 27, 28 and connecting the lines 30a, 30b to the air supply line 22. In other words, in each air cylinder 25, 26 for the engaging bodies 5, 6, each head side thereof is opened, and air is supplied to the rod side, so that the engaging bodies 5, 6 are operated by this air. The force and the force of the springs 49 and 50 installed in the cylinders 25 and 26 return them to their original positions. On the other hand, cylinder 1 for slide head 2
7, only the head side 23 is open and air is acting on the rod side, so the rod 18
is pressed by this air and the spring 12, and this force causes the slide head 2 to return to its forward initial position.

A series of greasing operations can be carried out as described above, but in the above-mentioned greasing device, the forward movement preventing force by the spring, which was conventionally performed by the auxiliary air cylinder, is alleviated by the head side 23 in the cylinder 17. The high-speed return to the forward initial position, which was conventionally performed by a return air cylinder, is achieved by the differential pressure between the cylinder 17 and the rod side 39, and the air on the head side 23 of the cylinder 17 is released, Since this is performed by applying air pressure only to the cylinder 17, it becomes possible to perform the functions that were conventionally performed by two cylinders with one cylinder 17. Therefore, although it has the same functions as the conventional one, its structure is simple, and the entire structure can be made compact and inexpensive. In addition, as a driving source for returning the slide head 2 to the forward initial position, the force generated by the air and the spring 12 are used as described above.
Since both of these forces are used in combination, even if some kind of accident occurs in the air supply line 22 and the air supply is stopped, the force of the spring 12 will ensure that the slide will continue. head 2
can be returned to its original position.

Although one embodiment of the moving body greasing device of this invention has been described above, the moving body greasing device of this invention is not limited to the above embodiment, and can be implemented with various modifications. Is possible. For example, in the above, a device is shown that has a structure in which a moving object such as a chain is refueled from both sides using a pair of greasing heads, but a device that is structured to refuel a moving object from only one side is shown. It can also be implemented in exactly the same way as above. Further, although the above example uses air as the driving source, it is of course possible to use other types of working fluid.

(Effect of the invention) The device for greasing a moving body according to this invention is constructed as described above. Therefore, in the apparatus for greasing a moving body according to this invention, conventionally two cylinders were required. Since the functions previously described can be performed by a single cylinder, the slide head can be smoothly moved forward and returned at high speed as in the conventional case, and the structure can be simplified. Therefore, the entire device can be constructed compactly and inexpensively.

[Brief explanation of the drawing]

Fig. 1 is an operating circuit diagram of an embodiment of the greasing device for a moving object of this invention, Fig. 2 is a cross-sectional view of its main parts, Fig. 3 is a side view similar to the previous figure, and Fig. 4. is an explanatory diagram of the overall configuration of the above device. 1...Bed, 2...Slide head, 3...
Greasing head, 12... Spring, 17... Cylinder, 23... Head side, 39... Rod side.

Claims (1)

[Scope of utility model registration request] In bed 1 installed along the moving route of moving body A,
In a greasing device in which a slide head 2 having a greasing head 3 is supported so as to be able to reciprocate along the movement path, a slide head 2 is placed between the bed 1 and the slide head 2 at an initial forward movement position. A cylinder 17 is interposed between the bed 1 and the slide head 2, and the cylinder 17 has a piston 17a disposed therein so as to be able to reciprocate. ,
It has a rod 18 which is connected to this piston 17a and led out to the outside of the cylinder 17, and which connects the rod 18 to the slide head 2 side and the cylinder 17 side to the bed 1 side. , cylinder chamber 1 on the rod 18 side
The fluid pressure acting in the cylinder chamber 7b urges the slide head 2 toward the forward movement initial position, while the fluid pressure acting in the cylinder chamber 17c on the opposite side of the rod urges the slide head 2 toward the moving body A. Further, the cylinder chamber 17b on the side of the rod 18 is connected to the fluid supply source 22 in any state of the reciprocating movement of the slide head 2, and the cylinder chamber 17c on the side opposite to the rod is connected to the fluid supply source 22. The fluid supply source 22 and the fluid discharge side can be switched and connected via the switching means 20, and when the cylinder chamber 17c on the opposite rod side is connected to the fluid supply source 22, the slide head 2 is connected to the moving body A. On the other hand, when the cylinder chamber 17c on the side opposite to the rod is connected to the fluid discharge side, the slide head 2 can be moved in the same direction as the cylinder chamber 1 on the rod 18 side.
A greasing device for a movable body, characterized in that it is configured to return to an initial forward position using a force caused by the fluid pressure in the moving body 7b and a force of the spring 12.