JP3516417B2 - Vial filling and filling equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vial filling capping device, and more particularly to a vial filling capping device that can accommodate vials of various sizes.

[0002]

2. Description of the Related Art A glass vial is used as a bottle container for a liquid drug, and a vial filling stopper device is widely known as a device for filling the vial with the drug and plugging the mouth. ing.

FIG. 11 shows a plan view of this conventional vial filling stopper, and FIG. 12 shows a front view thereof.

The vial filling and capping device 100 basically comprises a supply device 101 for supplying the vial V and a filling and capping device 110 for filling the vial V with a drug and inserting a stopper.

A plurality of empty vials V are stored in a vial supply device 101, and are sent in a line to a channel 104 connected to a filling stopper device 100 by a rotating arm 103 at the center of a circular table 102. .

The channel 104 is connected to the channel 111 of the filling and tapping device 110, and the filling device 112 is disposed at the center of the channel 111. Filler 11
2 is connected to the pump 113 (a pipe for connection is omitted in the figure). In the filler 112, the vial supplied to the channel 111 is dammed, and the nozzle 114 (FIG. 12) extends from the top to the mouth of the vial to fill the required amount of drug. As shown, two vials can be filled with drug at the same time.

The channel 111 is a rotary plate 1 having a central gear shape.
It has been extended to 20. The vial sent from the channel 111 is the recess 1 provided around the rotary plate 120.
21 are sequentially fitted into the roll 21 and are rotated together with the rotation of the rotary plate 120.

[0008] The filling stopper device 110 is a stopper supply device 122 and 123 capable of stocking stoppers and supplying them one by one.
Is provided, and each recess 12 of the rotary plate 120 is provided from each supply device.
Channels 124 and 125 extend to positions corresponding to 1.

The stoppers 122 and 123 are inserted into the mouths of the vials which are fitted into the recesses 121 of the rotary plate 120 and reach the tip positions of the channels 124 and 125 by the rotation thereof.
The stopper supplied from is supplied and fitted.

The vial having the stopper inserted therein is sent out to the discharge channel 126 by the rotation of the rotary plate 120 and discharged from the channel 126 to the outside.

[0011]

The conventional vial filling and capping apparatus as described above can continuously fill the drug and insert the stopper. However, there are various sizes of vials.

If the width of the channel and the recess of the rotating plate are determined according to the size of the small vial, the large vial cannot be handled.

When the width of the channel and the concave portion of the rotary plate are determined according to the large vial, the small vial plays with the concave portion of the channel and the rotary plate, and the accurate drug filling position,
The position of inserting the stopper cannot be determined, and neither the drug can be filled nor the stopper can be inserted.

Further, since the heights of the small vial and the large vial are different, even if the width of the channel is changed or the rotating plate is replaced in order to handle various vials, the drug filling position (nozzle) is changed. Height) and the position at which the stopper is supplied to the vial port are changed, and these positions must be adjusted each time, and it is practically impossible to handle various vials.

The present invention has been made to solve the above problems, and an object thereof is to provide a vial filling stopper device that can handle vials of various sizes.

Another object of the present invention is to provide a vial filling stopper device in which the drug filling position and the stopper fitting position do not substantially change depending on the type of the vial.

[0017]

A container filling and capping device of the present invention which achieves the above object is a supply device for supplying a plurality of containers one by one, a liquid filling device for injecting a liquid into a container, and a liquid filling device. The position of the liquid filling device, the position of the stopper supply device, which holds the containers supplied from the supply device one by one, the stopper supply device that supplies the stopper to the mouth of the container, the discharge device that discharges the stoppered container transported to consist transfer device for opening the container in a position of the discharge device, the transport device comprises a plurality of holding devices coupled to a closed loop by a chain, a sprocket for driving the closed loop, by rotating the sprocket
Consists of a that the rotating means, the holding device, for gripping the neck of the container, and a pair of openable holding piece, located beneath the holding device <br/>, the rail extending to near the supply device It has been driven, and opening means for opening the holding piece and an elastic means for applying a holding piece closing manner at all times force, opening means
Is a holding piece with each axis that supports each holding piece as the center of rotation.
Located between the pinion connected to the pinion,
A rack that can be moved while engaging each pinion, and
A pair of rails that extend downward from the underside of the rack
And a rod that slidably engages the holding device.
As the feeder approaches the feeder, the rod moves
When you move the rack following the
Open the holding piece while rolling it so that the holding device is near the feeding device.
Position, the rod comes off the rail,
More, each pinion flips and closes the retaining piece,
Is characterized by.

Instead of connecting the holding device by a chain, the holding device may be attached along the circumference of the disk.

On the underside of the rack, the rod engages the rail
A protrusion is provided on the side opposite to the side where

Further, a first cylinder is provided near the supply device.
Since the holding means is provided, the holding device is near the feeding device.
Position, and when the rod disengages from the rail, the first shaft
The tip of the linder means contacts the protrusion, and the elastic means
It is possible to limit the movement of the dock. Also, close to the discharge device.
A second cylinder means is provided by the side, and the holding device is discharged.
When located near the device, the tip of the second cylinder means
The end abuts the protrusion, and the rack is moved by elastic means.
Can be restricted.

The elastic means is preferably a spring,
The rack may be attached so as to be biased rearward, or each holding piece may be connected so as to be closed.

The feeding device is movable up and down so that the position of the neck of the container to be supplied matches the height of the holding piece of the holding device, and the bottom surface of the container conveyed to the position of the discharging device by the conveying device is so as to be positioned on the discharge device, the discharge instrumentation
It is desirable location is vertically movable.

The control means activates the first cylinder means when the holding device reaches the position of the feeding device ,
The holding device activates the second cylinder unit when it reaches the position of the discharge device is desirable.

[0024]

The holding device of the container filling and capping device according to the present invention comprises a feeding device (a
When approaching the ie holding position), that the rod of the opening means is driven on the rail, the rack is moved coercive Jihen is opened
Ku . At the holding position, the rod of the opening means is disengaged from the rail, and the holding piece is closed by the elastic means. At that time, the tip of the first cylinder abuts the projection of the opening means.
Restrict the movement of the rack, stop the closure of the holding piece and keep the holding piece open.

When the container is supplied between the holding pieces and the first cylinder is activated to restart the movement of the rack ,
The holding piece is closed and grips the neck of the container.

[0026] Although if the holding device holds the container, transfer device
By conveyed to a predetermined position.

The holding device is the ejector (ie, the open position )
Is reached, the tip of the second cylinder will project into the opening means.
When the second cylinder is activated , the
Inverting the pinion through the hook opens the retaining piece,
Open the container.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A plan view of a vial filling stopper device 1 of the present invention is shown in FIG. 1, and a front view thereof is shown in FIG.

The device 1 comprises a vial supply device 10, a vial discharge device 20, and a filling and capping device 30 for filling the vial V with a drug and inserting a stopper. The device is not limited to a vial, and may be a container that needs to be filled with a predetermined substance or a container that needs to be stoppered.

The basic structure of the supply device 10 is a table 11
It is the same as the previous one except that it can move up and down so that the height of can be changed arbitrarily. The channel 13 extends to the filling and capping device 30 so that the vials can be fed in a line from the position of the table.

As will be described below, the belt conveyor 1 for supplying the vials sent from the channel 13 to the vial holding position of the filling and capping device 30 one by one.
4 is located below the channel 13 (see FIG. 8).

The filling stopper device 30 includes a conventional filling device 3
1, a pump 32 (a pipe connecting the filling device and the pump is omitted), and two plug feeders 33 and 34
Is provided.

In this embodiment, the number of filling devices is one and the number of plug supplying devices is two. However, the number is limited to these, and the numbers may be appropriately determined as necessary.

The stopper supplies 33 and 34 are channels 35 and 36, respectively, for supplying stoppers to the vial position.
The stopper is placed at the mouth of the vial and has stoppers 37 and 38 for fitting.

In the center, there is provided a carrier device 40 having a holder for holding the neck portion of the vial, which will be described below and whose upper side is covered with a protective plate 39 and which is partially exposed to the outside along the periphery thereof. .

The discharging device 20 for discharging the vial having the stopper inserted therein has a discharging channel 21, and further, a belt conveyor 20 a for sending the vial discharging position of the filling stopper device 30 to the discharging channel 21 has a channel 21. Is provided below (see FIG. 9) . FIG. 3 is a plan view of the filling and tapping device, which is a partial cross section taken along line 3-3 of FIG. As shown in FIG. 8 and FIG. 9, an intermediate base 41 is provided in the filling and capping device 30, and a rotation mechanism for rotating the chain of the conveying device, a filler 31, and a lower part thereof are provided. the mechanism for vertically moving the capping unit 37, 38 is provided (not shown), these mechanisms are intended previously outside the scope of the present invention.

Rotating shafts 42 and 43 extend upward from the base 41, and at least one of the rotating shafts is connected to a rotary drive mechanism for rotation. Holding position Pin on the vial supply device 10 side
A horizontal half rail 44 of an ellipse is provided from the vicinity of to the vicinity of the discharging position Pout on the vial discharging device 20 side. On the rail 44, a retaining device (50, which will be described below, slides (see FIG. 8).
The horizontal half of the ellipse is that the holder for holding the vial grips the vial at the holding position Pin and opens it at the open position Pou.
This is so that the holding device 50 can be kept horizontal when held up to t (see FIGS. 4 and 6c). Since the holding device does not hold the vial from the open position Pin to the holding position Pout, the rail is not essential, but a similar rail may be provided from the open position to the holding position in order to perform a smooth rotation operation.

At the intermediate position of the rail 44, that is, at the drug filling position P1, the drug is filled, and the plug mounting positions P2 and P2 '.
In order to keep the holding device horizontal, as shown in Fig. 6c, the stopper is inserted and the holding device is loaded.
A protection guide 45 is provided so as to cover the rear end of the holding device. Further, the protection guide 46 is provided in line symmetry with respect to the protection guide 45 to ensure smooth movement of the holding device.

Further, on the vial supply device 10 side, a circular arc-shaped rail 47 of approximately a quarter circle is provided at a position in contact with the bottom surface of the holding device 50. The distance r between the end of the rail 47 on the protection guide 46 side and the rotary shaft 42 is
It is shorter than the distance R between the end of the rail 47 on the holding position Pin side and the rotating shaft. This installation, which will be explained below with reference to FIG.
This is because when 0 slides, the holding piece guides the opening.

The plate 4 for holding the cylinder 48 below the rails 45 and 47 on the vial supply device 10 side.
8'is installed , and the rail 4 is placed on the side of the vial discharging device 20.
A plate 49 'for holding the cylinder 49 is installed below 5 (see FIGS. 8 and 9) . FIG. 4 is a partial cross-sectional view taken along the line 4-4 in FIG. 2 in which a part of the protection plate 39 is cut away to show the transport device 40.

A sprocket 42 'is fixed to the rotary shaft 42 (not shown, a sprocket is similarly fixed to the rotary shaft 43).

A plurality of holding devices 50 are connected by a chain 51 so as to surround these sprockets, forming a closed loop as a whole.

Therefore, when the rotating shaft rotates and the sprocket rotates, the closed loop rotates to hold the vial at the holding position P.
It can be conveyed from in to the open position Pout.

FIG. 5a shows a plan view of the holding device 50 and FIG.
Shows a rear view of the holding device. 6a is a front view of the holding device 50, FIG. 6b is a cross-sectional view taken along the line 6b-6b of FIG. 5a, and FIG. 6c is a front view central longitudinal cross-sectional view of the storage device slidably accommodated in the protection guide. is there.

As shown in these figures, the holding device 50 basically comprises an "L" -shaped base plate 52, and a vertical portion of the plate 52 is provided with a recess 53, the water of which is formed. the flat portion is formed from the tip groove 54 to the rear end, slidably rack 55 is accommodated back and forth therein. Further, an opening 56 is formed on the bottom surface of the horizontal portion so that the projection 55 ′ and the rod 55 ″ extending downward from the rack 55 can be exposed to the outside and that the rack 55 can be moved back and forth as the rack 55 slides back and forth. There is.

In the horizontal portion of the plate 52, the pinions 57 and 5 which engage with the rack 55 symmetrically on both sides of the groove 54.
7 is accommodated and is rotatably supported by pins 58, 58 (FIG. 6b). The upper ends of the pinions 57, 57 are exposed to the outside, and the holding pieces 59, 59 are fixed to the holding pieces 5.
Auxiliary pieces 60, 60 extend to face the inside of the tips of 9, 59, and the tips of the auxiliary pieces 60, 60 have a vial V
Has a notch to make it easier to grip the neck of the.

The holding piece and the auxiliary piece can be reliably gripped even if the thickness of the neck of the vial is different, and the center position thereof hardly changes. Therefore, the position of the filling nozzle and the position of the stopper supply do not need to be adjusted even if the thickness of the vial changes.
Even if necessary, the adjustment amount is small.

When the rack 55 moves forward, the pinion 57,
57 rotates in a mirror image relationship, the holding pieces 59, 59 rotate to open each other (indicated by the arrow in FIG. 5a), and when the rack 55 retracts, the pinions 57, 57 reverse and the holding pieces rotate. To do.

On the upper surface of the rack 55, a rod 55a protruding from the groove 54 and a rod 53 fixed in the recess 53 are provided.
A spring 53 ′ is passed between the rack 55 and a, and the rack 55 is always retracted so that the holding pieces 59, 59 are closed. A spring that connects the holding pieces also has the same function as the spring 53 '.

A chain 51 for connecting the holding device 50 to the upper, lower, left and right sides of the rear end of the plate 52 (see FIG. 4).
a, 51b, 51c, 51d are pins 51a ', 51b'
It is installed by. Thus, by pivotally supporting the chains of the holding device (pins 51a ″, 51b ″), a closed loop is formed as shown in FIG.

The following describes how the holding device holds and opens the vial.

FIG. 7a shows the holding device 50 in a state of looking up from the lower side of the rail 47 on the vial supply device side.
7b shows how to open the holding piece 59, and FIG. 7b shows how to close the holding piece 59 of the holding device 50 when looking up from the lower side of the rail 44 on the vial supply device side 10.

As shown in FIG. 7a, the rail 47 is located between the projection 55 'of the retainer and the rod 55 "(FIG. 6c) and, as previously described, one end of the rail 47 (protection guide 46).
The distance r from the side) to the rotation shaft 42 is smaller than the distance R from the other end of the rail 47 (the end on the side of the vial holding position Pin) to the rotation shaft 42. on the other hand,
The holding device 50, which is connected by a chain 51 and follows a circular sprocket, moves on a circle equidistant from the rotation 42 (indicated by a broken line in the figure). Therefore, the rod 5
5 "slides on the outer edge of the rail 47, so the rod 5
5 "gradually advances the rack 55 connected to it and rotates the pinion 57. Rotation of the pinion 57 causes the holding piece 59 to open.

The other end of the rail 47 is, as shown in FIG. 7a,
The holding device 50 extends only near the holding position Pin.
Reaches the holding position Pin, the rod 55 ″ is disengaged from the rail, the spring 53 ′ moves the rack 55 rearward, and the holding piece tries to close. At that time, the cylinder 4
The tip of the piston of No. 8 comes into contact with the protrusion 55 ', and the rack 55
Stop the retreat. Therefore, the holding piece 59 remains open.

When the vial supplied by the belt conveyor 14 reaches the holding position Pin, the cylinder 4
The piston of 8 is retracted, with which the rack 55 is retracted and the retaining piece 59 is closed, retaining the vial neck (FIG. 7b).

When the connected holding device 50 reaches the holding position Pin, the vial is supplied by the belt conveyor 14, and when the vial reaches the holding position, the cylinder is activated and the holding piece is closed. , It is necessary to synchronize the rotation of the sprocket, the moving speed of the belt conveyor, and the activation timing of the cylinder.

As shown in FIG. 4, the vial held by the holding device 50 is conveyed to the filling position P1, where the drug is filled, and the stopper is supplied and fitted at the positions P2 and P2 '. In these positions, as shown in FIG. 6c, the rear of the holding device is in the protection guide 45 and the tip is on the rail 4
4, the closed loop composed of the plurality of holding devices 50 smoothly rotates and carries the vial to the open position Pout while holding the neck of the vial.

When the holding device holding the vial has just reached the open position Pout (at this time, the piston of the cylinder 48 is retracted just at the vial supply position), the piston of the cylinder 49 is extended and its tip is a projection 55 '. And press the protrusion 55 '(FIG. 9). At that time, the rack 55 advances, the holding piece 59 opens, the vial is opened, and it is discharged onto the belt conveyor. The Baltic conveyor 20a guides the vial, which is filled with the medicine and fitted with the stopper, to the vial discharging device.

By the above operation, the empty vial supplied by the supply device is continuously filled with the liquid, the stopper is inserted, and the vial is automatically discharged to the vial discharging device.

When a vial having a different size, for example, a vial having a size larger than that of the vial described above is filled with a liquid and a stopper is fitted therein, the vial supply device 1 is used.
The position of the table 11 of 0 is lowered, and the neck of the vial is adjusted to the position of the holding piece of the holding device 50. When the width of the channel 13 is about the diameter of a small vial,
Adjust its width to allow the passage of large vials. Similarly, in the discharge device 20, in the open position, the height of the vial whose neck is held by the holding device is adjusted so that the bottom of the vial is on the upper surface of the belt conveyor, and the width of the discharge channel is adjusted.

In the transfer device 40 of the filling and capping device 30, since the vial is held by the holding device 50 at the neck thereof and the lower part of the vial is opened, no adjustment is made even if the size of the vial changes. Does not need

FIG. 10 is a plan view of a vial filling stopper according to another embodiment of the present invention.

In this embodiment, in FIG. 1, the closed loop is passed to two sprockets, and the closed loop is rotated.
The only difference is that a plurality of holding devices are connected around one disc and the disc is rotated.

Also in this other embodiment, the vial is supplied from the vial supply device 10 'to the filling and capping device 30'. When moved along the rail 47 ', the holding device 5
When the 0'holding piece 59 'is opened and the holding position is reached, the vial is supplied. The holding device 50 'holds the neck of the vial by actuating a cylinder (not shown), conveys it to the filling position, the stopper supplying position, and in the open position, opens the vial by actuating the cylinder and opens the vial. Is discharged to the discharge device 20 '.

In this embodiment, since the holding device is held by the disk, the rail 44 'is not particularly necessary.

[0066]

In the container filling and capping device of the present invention, the holding member of the holding device is surely opened at the holding position by the opening means being driven on the rail. Further, the holding piece is surely closed by the activation of the first cylinder and the elastic means. Therefore,
Since the holding means securely grips and holds only the neck of the container and conveys it to a predetermined position, it is possible to hold and convey containers of various sizes without changing the mechanism of the apparatus.

Further, since the holding device is connected to the closed loop by the chain, a plurality of containers can be continuously gripped and held to perform a predetermined process.

When the holding device around the disk is attached, the number of containers that can be processed at one time is reduced, but the mechanism is simplified and the interlocking relationship between the elements is also simplified.

Further, since the opening means is composed of the pinion connected to the holding piece and the rack meshing with the pinion, the mechanism is simple and the holding piece can be opened and closed surely by simply moving the rack.

[Brief description of drawings]

FIG. 1 shows a plan view of a vial filling stopper according to the present invention.

FIG. 2 shows a front view of the device of FIG.

FIG. 3 is a partial cross-sectional view of the device taken along line 3-3 of FIG.

4 is a partial cross-sectional view of the device taken along line 4-4 of FIG.

5a shows a top view of the holding device and FIG. 5b shows a rear view of the holding device.

6a is a front view of the holding device and FIG. 6b is FIG. 5a.
6a is a partial cross-sectional view of the retainer taken along line 6a-6a of FIG.
c shows a central vertical sectional view of the front view in a state where the rear part of the holding device is housed in the protection guide.

FIG. 7a shows that the rod follows the rail,
When the holding device moves, it shows that the holding piece opens.
FIG. 7b shows the state in which the projection causes the holding piece to close when the cylinder is activated.

FIG. 8 is a partial vertical cross-sectional view in the vicinity of the vial holding position of the present device, showing a state in which the cylinder holds the vial in cooperation with the protrusion of the holding device.

FIG. 9 is a partial vertical cross-sectional view in the vicinity of the vial opening position of the present device, showing a state in which the cylinder opens the vial in cooperation with the protrusion of the holding device.

FIG. 10 shows a plan view of another embodiment according to the present invention.

FIG. 11 shows a plan view of a conventional vial filling stopper device.

FIG. 12 shows a front view of the device of FIG.

[Explanation of symbols]

40 Conveyor 47 rails 50 holding device 51 chains 52 base plate 53 recess 53a rod 53 'spring 55 racks 56 openings 57 Pinion 58 pin 59 holding piece 60 auxiliary pieces

Claims (8)

(57) [Claims] 1. A supply device for supplying a plurality of containers one by one, a liquid filling device for injecting a liquid into a container, a stopper supply device for supplying a stopper to a mouth of a container filled with a liquid, and a stoppered container. discharge device for discharging, and said supply containers one by one holding the feeder, the position of the liquid filling apparatus, transported to the position of the plug supply device, transport device to open the container at the location of the eductor consisting, in container filling capping apparatus, made from the conveying device, a plurality of holding devices coupled to a closed loop by a chain, a sprocket for driving said closed loop, a rotating means for rotating the sprocket, the holding device, for gripping the neck of the container, a pair of openable holding piece, located beneath the holding device,
Said driven rail extending near feeder has a releasing means for opening the coercive <br/> supporting pieces, and elastic means for applying the holding piece closing manner at all times force, the open A means is located between the pinion connected to the holding piece and having each of the shafts that pivotally support the holding piece as a center of rotation , and the pinion is movable while engaging with the pinion.
Extending a rack, and downwardly from the lower surface of the rack,
A rod slidably engaging the outer edge of the rail, wherein the holding device is brought closer to the feeding device by the carrying device.
As the rod follows the rail,
When the rack is moved, each pinion will rotate.
When the holding piece is opened near the feeding device,
The rod is disengaged from the rail, and by the elastic means,
Each pinion is inverted to close the holding piece.
And a device characterized by. 2. A supply device for supplying a plurality of containers one by one, a liquid filling device for injecting a liquid into the container, a stopper supply device for supplying a stopper to the mouth of the container filled with the liquid, and a stoppered container. A discharging device for discharging and a container that holds the containers supplied from the supplying device one by one, conveys them to the position of the liquid filling device and the position of the stopper supplying device, and opens the container at the position of the discharging device. consisting, in container filling capping apparatus, from said transport device, a plurality of holding devices mounted along the periphery of the disk, and rotating means for rotating said disc
Consisting of a pair of openable and closable holding pieces for holding the neck portion of the container, and the holding device being located under the holding device ,
By being driven by the rail extending to near the supply device, and opening means for opening the holding piece, and an elastic means for applying the holding piece closing manner at all times force, the opening means is a plurality of register Rotating each axis that supports one piece
A pinion connected to the holding piece, which is the core, and each of the pinions.
It is located between the pins and can move while engaging with each pinion
Rack, and extends downward from the bottom surface of the rack,
A rod slidably engaged with the outer edge of the rail
The holding device approaches the feeding device by the transport device.
As the rod follows the rail,
When the rack is moved, each pinion will rotate.
When the holding piece is opened near the feeding device,
The rod is disengaged from the rail, and by the elastic means,
Each pinion is inverted to close the holding piece.
And a device characterized by. 3. A device according to claim 1 or 2, further on the lower surface of the rack, the rod match engagement with the rail
Is provided on the side opposite to the side where the first cylinder means is provided near the supply device.
And the holding device is located near the feeding device,
When the cylinder comes off the rail, the first cylinder
-The tip of the means comes into contact with the protrusion, and the elastic means
A second cylinder means is provided to limit the movement of the rack and near the ejector.
And the holding device is located in the vicinity of the discharging device.
The tip of the second cylinder means comes into contact with the protrusion.
Restricting movement of the rack by the elastic means,
A device characterized by the above. 4. A device according to claim 1 or 2, wherein the resilient means is a spring for biasing the rack so that the holding piece is closed, characterized in that device. 5. The device according to claim 1, wherein the elastic means is a spring that connects the holding pieces.
A device characterized by the above . 6. The apparatus according to claim 1, wherein the supply device is vertically movable so that the position of the neck of the container to be supplied is aligned with the height of the holding piece of the holding device. There is a device. 7. The apparatus according to claim 1 or 2, wherein as position the bottom of the transport containers to the discharge device by the transfer device is located on the discharge device, the discharge device is vertically A device that is movable. 8. The apparatus according to claim 3 , wherein when the holding device reaches the position of the supply device , the first cylinder means is activated to bring the holding device to the position of the discharge device . further comprising a control means for activating said second cylinder means when it reaches, especially that
Features and equipment .