JPS6220860B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for automatically dispensing a fixed amount of a liquid agent filled into a tube-shaped container.

This type of metering injection device is already known. Conventionally, this device has a structure in which the liquid agent in the container is transferred to a container in the main body of the device, and then a fixed amount is injected from the container.

Therefore, in this case, such transfer work is required separately.

However, since this work has conventionally been performed mainly by hand, the work is extremely laborious, and especially with highly viscous silicone-based liquids, the work is extremely difficult and inefficient.

Moreover, when such liquids are sealants, adhesives, etc., they dry quickly and harden once they come into contact with air.
Such conventional injection methods cannot be adopted.

Therefore, it is necessary to inject these liquid agents while they are still filled in the container.

The present invention has been proposed in view of the above points, and is a metering injection device for a tube-shaped container that is capable of automatically injecting a fixed amount of liquid such as a sealant or adhesive while the container is filled. It provides:

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show an example of the present quantitative injection device, in which a flat plate-shaped support stand 3 is horizontally installed at a predetermined position on a base plate 1 via support legs 2. FIG. A pair of side frames 4, 4 are erected on both sides of the support stand 3. A rear plate 5 is disposed above and below the support base 3 between both frames 4, 4 with a required length. Between the upper ends of both frames 4, 4 on the front side of this rear plate 5,
An upper plate 6 is disposed horizontally and opposite to the support base 3. Note that the lower front side of the support base 3 of both frames 4, 4 is cut out and opened in the left-right direction.

A pair of guide posts 7, 7 are erected between predetermined positions on both sides of the support base 3 and the upper plate 6, and the upper and lower ends of the guide posts 7, 7 are provided with respective fitting holes 3a of the support base 3 and the upper plate 6. , 6a and fixed with screws from above and below.

Hollow shaft portions 8a, 8a provided on both rear sides of the support member 8 are fitted into the guide posts 7, 7 so as to be vertically slidable via a pair of upper and lower ball bushes 9, respectively. This support member 8
consists of shaft portions 8a, 8a and a connecting portion 8b that connects the shaft portions 8a, 8a, and has a substantially H-shape with the upper and lower ends thereof cut away within a required range. An insertion hole 8c is bored in the center of the upper surface of the connecting portion 8b, and a screw bearing 10 that is screwed onto the feed screw shaft 12 is inserted into the insertion hole 8c, and the flange portion 10a of the screw bearing 10 is inserted into the hole 8c. It is fixed with screws on the bottom side. Furthermore, the connecting portion 8b of this support member 8
On the front is a tube-shaped container squeezing unit 11.
is fixed with screws. On the other hand, a feed screw shaft 12 having a thread groove of a required pitch on its outer periphery is arranged between the guide posts 7, 7. The upper and lower ends of the feed screw shaft 12 are rotatably supported by bearings 13, 13 inserted into the support base 3 and the upper plate 6 so as to be rotatable in a desired direction.

The screw bearing 1 is attached to this feed screw shaft 12.
0 is screwed into the support member 8, that is, the squeezing unit 1, through which the support member 8, ie, the squeezing unit 1, is
1 can be moved up and down. Further, a gear 14 is integrally attached to the lower end of the screw shaft 12, and is meshed with a gear 16 provided on an output shaft 15a of a drive means 15 arranged behind the screw shaft. By driving this driving means 15, the feed screw shaft 12 is rotationally driven via gears 14 and 16.

As shown in FIG. 2, this drive means 15 is composed of a reversible motor 15b which is integrally equipped with, for example, a gear head 15c at the front and a mechanical electromagnetic brake 15d at the rear. It is attached via 17. This motor 15b is designed to be able to switch between forward and reverse rotation instantaneously, and to be driven and stopped instantaneously by an electromagnetic brake 15d.

These drive controls are performed by a control means (not shown). Further, the output shaft 15a penetrates and protrudes from the front surface of the gear head 15c to the lower surface side of the base 17,
A gear 16 is attached to the protruding end.

Next, the tube-shaped container clamping means in this apparatus is constructed as follows. That is, on the lower surface side of the upper plate 6, a pair of left and right plate-shaped arms 1 are provided approximately at the center in the left-right direction of the device.
8 and 18 are provided at a predetermined interval and protrude a required length from the front of the device. This arm 18, 18
The rear end and upper surface of the plate are fixed to both plates 5 and 6 by screws.

A pair of support plates 19, 19 are vertically disposed downwardly on the outside of the tips of the arms 18, 18, perpendicular to the arms.

Mounting plates 20 and 21 are disposed to face each other between substantially central portions of the support plates 19 and 19 in the vertical direction and between the upper ends of the arms 18 and 18.

Insertion holes 20a and 21a facing each other are vertically and concentrically formed through the mounting plates 20 and 21, and the operating shaft 22 is inserted and fitted therein so as to be slidable vertically. Further, a collar portion 22a formed below the operating shaft 22 comes into contact with the upper surface of the mounting plate 21 to restrict its downward position. A collar portion 22 is provided on the outer periphery of this operating shaft.
A coil spring 23 is interposed between the mounting plate 20 and the mounting plate 20, and constantly biases it downward in the drawing.

Further, one end of a pair of links 24, 24 is rotatably attached to a lower end portion of the operating shaft 22 projecting downward from the mounting plate 21 so as to be rotatable around a fulcrum A.

On the other hand, a pair of front and rear clamp arms 25, 25 are disposed at the lower end positions of the support plates 19, 19, and are pivoted from the outside of both plates 19, 19 by pins 26, 26, and the upper ends thereof is pivotally attached to the other end side of the links 24, 24 so as to be relatively rotatable around fulcrums RO and RO. Furthermore, the support plate 1 of the clamp arms 25, 25
Clamp claws 25a, 25a are provided at the portions projecting downward from the tips of 9, 19, and locking grooves 25b, 25b are recessed in the width direction on the inner surfaces thereof, respectively. The terminal end a of the tubular container A is fitted and held in the locking grooves 25b, 25b. In addition, in this example, clamp arm 2
5, 25 have a width approximately equal to the distance between both plates 19, 19, and clamp claws 25a, 25.
The width of a is wider than that.

The operating shaft 22, links 24, 24, and clamp arms 25, 25 constitute a clamp mechanism. In this example, this mechanism is a toggle link mechanism using these members, and as shown by the imaginary lines in FIG.
When the terminal end a of the container A is clamped between the ends a and a, as shown in FIG. The toggle effect acts to restrict the clamping claws 25a, 25a in the expanding direction, and the container A is held firmly and reliably between the clamping claws 25a, 25a.

To remove the container A held between the clamp claws 25a, 25a, the operating knob 27 attached to the upper end of the operating shaft 22 can be pulled upward as shown by the arrow in FIG. . As a result, the upper ends of the clamp arms 25, 25 relatively rotate inward (in the direction of the arrow shown in the figure) about the pins 26, 26 via the operating shaft 22 and the links 24, 24, thereby reducing the space between them. At the same time, the space between the clamp claws 25a, 25a expands outward (in the direction of the arrow shown in the figure), and as a result, the container A can be removed extremely easily from between the both claws 25a, 25a.

The squeezing unit 11 is supported by the support member 8 and located below this clamp mechanism.

This squeezing unit 11 is constructed as shown in FIG.

In the figure, the housing 30 of this unit has a substantially U-shape, and its central mounting surface is fixed to the front surface of the connecting portion 8b of the support member 8 with screws. At approximately the center of the lower end surfaces of both sides 30a, 30a, there is a notch 30 into which the piece 31 is fitted.
b, 30b are cut out downward at a required depth. Rectangular insertion holes 30c, 30c, into which the shaft portion 31a of the top 31 is inserted, are bored at the center of the upper end surfaces of the notches 30b, 30b to a required depth.

Furthermore, first shafts 32, 32 are located at the lower end positions inside the both sides 30a, 30a, with the notches 30b, 30b in between, and a second shaft 32, 32 is located between a predetermined position above the outside of these shafts 32, 32. The shafts 33, 33 are horizontally suspended as a pair of front and rear, and both side parts 30a, 30a
On the inside, one end of a second link 34, 34, .

The other ends of the links 34, 34 face each other as a pair of front and back, and the container A is placed between the other ends.
A pair of front and rear squeezing rollers 35, 35 are horizontally mounted.

On the other hand, the piece 31 has a block shape, and has a prismatic shaft 31a protruding from the center of its upper surface, and a long hole 31b having a required length from front to back is formed in the side thereof. The tip shaft portions 35a, 35a protruding from the links 34, 34 of the squeezing rollers 35, 35 are inserted into this. The pieces 31, 31 are the above-mentioned notches 30b, 30b
It is vertically slidably fitted into the holder, and its upper end surface abuts the upper surface of the notch to restrict its position upward in the drawing.

As the pieces 31, 31 move up and down, the tip shaft portions 35a, 35a are guided within the elongated hole 31b and slide toward or away from each other, and the two squeezing rollers 35, 35 are linked via this. 34, 34 and rotate around the shafts 32, 32 in a direction in which the space between them expands or contracts.

Torsion coil springs 36, 36 are wound around both ends of the shafts 32, 32, respectively, and one side of the torsion coil springs 36, 36 is wound around the second shafts 33, 33, and the other side is wound around the squeezing rollers 35, 35. , the rollers 35, 35, together with the links 34, 34, are always urged upward in the drawing. As a result, frame 31,3
1 is urged upward via the tip shaft portions 35a, 35a of the rollers, and is positioned in the above-mentioned abutting state within the notches 30b, 30b.

In this state, both links 34, 34 are positioned in a straight line in the horizontal direction, and the circumferential surfaces of the squeezing rollers 35, 35 are in contact with each other, and these links and rollers are held in this position. Further upward rotation is restricted.

In this embodiment, the central axis of the clamp mechanism is located at the center in the left-right direction between both rollers, and coincides with a common tangent line between the two rollers when they are in contact with each other.

The container A is then squeezed between the squeezing rollers 35, 35 to squeeze out the liquid. In this example, the pieces 31, 31, the shafts 32,
2. The links 34, 34 and the rollers 35, 35 constitute a toggle link mechanism, and the reaction force due to this toggle effect is applied to the container A in the pinched state.
is converted into a pressure contact force against the container A.
The required squeezing force is obtained.

This squeezing force is strongest when the links 34, 34 are positioned in a straight line and both the rollers 35, 35 are in an abutting state.

In this example, the rollers 35, 35 are expanded or contracted within a required range by the rotation of the links 34, 34 with the shafts 32, 32 as fulcrums.
Since this distance can be adjusted arbitrarily, the distance between them is also variable, and therefore it can be applied to various types of containers A of different sizes.

Furthermore, a mechanism for separating the squeezing rollers 35, 35 from the container A and releasing the clamping pressure on the container A is provided at a predetermined position of the squeezing unit 11.

This mechanism, as shown in Figs. 2 and 3,
It is a toggle link mechanism, and the pieces 31, 31 are disposed outside both sides 30a, 30a of the housing 30, and one end thereof is on a common tangent to both the rollers 35, 35.
A pair of left and right links 37, 3 pivoted at the upper position
7, and a substantially L-shaped member whose other end is pivoted at the upper position of both sides 30a, 30a on the common tangent of both rollers, and whose substantially central bent portion is pivoted at the other end of the links 37, 37. A pair of levers 38, 38 forming a
It consists of both levers 38 and a handle 39 supported between the other ends of 38.

Then, from the solid line state shown in FIG.
By rotating downward (in the direction of the arrow shown in the figure), the levers 38, 38 are rotated in the direction of the arrow about the fulcrum C, and the links 37, 37 are rotated in the direction of the arrow shown in the figure about the fulcrum D. move.
At the same time, the fulcrums 2 of the links 37, 37 move downward on the common tangent line, and the pieces 31, 31 slide downward in the notches 30b, 30b against the coil springs 36, 36. and is located as shown by the imaginary line. At the same time, the squeezing rollers 35, 35 rotate downward together with the links 34, 34 via their tip shaft portions 35a, 35a to the position shown by the same imaginary line, and the space between them is expanded at a required interval. As a result, the rollers 35, 35 are completely separated from both sides of the container A, and their pinching pressure is released.

In this state, each of the fulcrums C and D and the pivot point H of the links 37 and 37 and the lever 38 are located in a straight line on the common tangent line, and therefore, due to the toggle effect, the lever 38 and the link 37, 3
7 is firmly held in the rotational position, and
The rollers 35, 35 are held in this expanded position.

On the other hand, when the handle 39 is rotated upward from this state, the lever 38 and the link 37 are very easily rotated back to their original positions due to the toggle action, and along with this, both the rollers 35, 35 and the pieces 31, 31
is forced to return to its original position. In addition, 40
is a panel that closes the rear and top surfaces of the device.

Now, next, the operation of squeezing out a liquid from a tube-shaped container using the present quantitative injection device having the above-mentioned configuration will be explained.

This container A is made of a relatively hard material,
This is filled with a silicone-based liquid such as an adhesive or a sealant that has relatively high viscosity and dries quickly.

As described above, this container A is held at its terminal end a between the clamp claws 25a, 25a of the clamp mechanism, and is mounted on the apparatus as shown by the imaginary line in FIG.

In this state, the squeezing unit 11 is
As shown in FIG.
Container A is sandwiched between the front and rear surfaces of container A.
It is prepared for squeeze operation.

Here, when the driving means 15 is operated, the feed screw shaft 12 is rotationally driven in a desired direction via the gears 14 and 16, and the squeezing unit 11 is guided via the screw bearing 10 and to the guide posts 7, 7. and moves downward at a predetermined speed.

Then, at this predetermined transition position, the squeezing rollers 35, 35 come into contact with the terminal end a of the container A, and then press it from both the front and back sides with the required pressing force as described above (see FIG. 4a).

As a result, a fixed amount of the liquid agent is injected from the discharge port at the tip of the container A. This is then sequentially supplied to predetermined locations on the object to be adhered or the like.

Thereafter, as the squeezing unit 11 moves downward, the container A is successively squeezed from the upper end to the lower end by the rollers 35, 35, and a fixed amount of liquid is continuously injected.

In this case, the injection amount of the liquid agent is always maintained at an optimum value by a control means (not shown) including a detector, etc., and the squeezing force of the squeezing rollers 35, 35 is also set to a predetermined value in accordance with this. Set. Furthermore, the gear ratio and rotational speed of the driving means 15, the pitch of the feed screw shaft 12, etc. are set to predetermined values, so that the descending speed of the squeezing unit 11 is also set to the optimum value according to the work mode. controlled.

Then, when the squeezing unit 11 moves downward to a predetermined position and the rollers 35, 35 reach the end of the shoulder b at the lower end of the container A, the liquid inside the container A is completely squeezed out and the work is completed (Fig. 4b). reference).

Now, suppose that a case arises in which the work is stopped during the above-mentioned squeezing process.

In this case, when the handle 39 is rotated downward as described above, the lever 38 and the links 37, 3
The space between the squeezing rollers 35, 35 is expanded at a required interval via the rollers 7, etc., and the rollers 35, 35 are separated from the container A, the pinching pressure is released, and the injection of the liquid agent is stopped.

Thereafter, the discharge port of container A may be closed with a cap or the like. If the container A is attached to the device in this state, the next squeezing operation can be performed immediately.

In this way, all the above-mentioned liquid agent squeezing operations are completed.

As explained in detail above, the metered injection device according to the present invention can automatically inject a metered amount of the liquid agent while it is still in the container, so there is no need for the conventional transfer operation. , work efficiency is greatly improved. Furthermore, there is no loss of liquid agent due to this transfer operation, and the liquid agent can be fully utilized, which has the advantage of reducing material costs.

Furthermore, as described above, the present invention can be squeezed out while still being filled in the container, so it can be applied very effectively to quick-drying liquids such as adhesives and sealants without any problems. Furthermore, in the present invention, as explained in the above embodiment, the squeezing force of the squeezing roller converts the reaction force due to the toggle effect of the toggle mechanism into a pressing force against the container, and the squeezing force is applied to the container more than a predetermined amount. Squeezing force is constantly applied, so it can be applied to highly viscous materials such as silicone-based liquids without any problems, and has great practical effects.

Moreover, in this invention, as mentioned above, there is no need for any work such as transferring the liquid agent, so there is almost no need for manual work, and there is an advantage that the above-mentioned squeezing work can be completely automated.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of the quantitative injection device according to the present invention with the squeezing unit removed, Fig. 2 is a sectional view taken along the line V-V in Fig. 1, and Fig. 3 is an exploded view of the squeezing unit of the device. Perspective view,
FIGS. 4a and 4b are diagrams illustrating the squeezing process of a tube-shaped container to which the present apparatus is applied. DESCRIPTION OF SYMBOLS 1... Base plate, 2... Support leg, 3... Support stand, 4, 4... Side frame, 5... Rear plate, 6... Upper plate, 3a, 6a... Fitting hole,
7, 7... Guide post, 8... Support member, 9, 9...
Ball bush, 10... Screw bearing, 11...
Squeezing unit, 12... Feed screw shaft, 15... Drive means, 14, 16... Gear, 15b... Reversible motor, 15d... Mechanical electromagnetic brake, 2
2... Operating shaft, 23... Coil spring, 24, 24... Link, 25, 25... Clamp arm, 25a, 2
5a...clamp claw, 25b, 25b...locking groove, 3
0...Housing, 30b, 30b...Notch, 3
1, 31...frame, 32, 33...axis, 34, 34...
Link, 35, 35... Squeezing roller, 36, 3
6...Torsion coil spring, 37, 37...Link, 3
8...Lever, 39...Handle, I, B, H, D, H...
Fulcrum, A...container.

Claims (1)

[Scope of Claims] 1. A pair of left and right guide posts erected on a base plate, a squeezing unit that is guided by the guide posts so as to be movable up and down and is provided with pressure contact means for a tube-shaped container at a predetermined position; a driving means connected to the squeezing unit via an appropriate coupling means to drive the unit up and down; and a clamping means for the container disposed at a predetermined position above the front surface of the guide post so as to face the squeezing unit. A metering injection device for a tube-shaped container, characterized by comprising: 2. The metering injection device for tube-shaped containers according to claim 1, wherein the pressing means of the squeezing unit comprises a toggle link mechanism provided with a pair of squeezing rollers. 3. The connecting means includes a feed screw shaft supported between the guide posts, a gear train connecting the feed screw shaft to the drive means, and a feed screw shaft disposed at a predetermined position of the squeezing unit. The metering injection device for a tube-shaped container according to claim 1, characterized in that the device comprises a bearing means screwed into the tube-shaped container. 4. Claim 1, characterized in that the clamping means is provided with a pair of clamp claws for clamping the container, and the clamping claws are configured to attach and detach the container using a toggle link mechanism. A quantitative injection device for a tube-shaped container as described in .