WO2012059283A1

WO2012059283A1 - Sealant gun

Info

Publication number: WO2012059283A1
Application number: PCT/EP2011/067223
Authority: WO
Inventors: Roland Hiltbrand
Original assignee: Trikora Construction Ag
Priority date: 2010-11-02
Filing date: 2011-10-03
Publication date: 2012-05-10
Also published as: EP2635382A1; CH704087A1; EP2635382B1

Abstract

The invention relates to a gun for dispensing a viscous medium from a cartridge, comprising a receiving space (1) for receiving the cartridge, a pressure rod (2) which can be pushed into the receiving space and has a serration (20), the pressure rod (2) being movable along a longitudinal axis (L) in an actuating direction (B) and in a rearward direction (R) opposite to the actuating direction (B), an actuating lever (3), which can be pivoted about a pivot point (D) over a pivoting path, an advancing unit (4) for advancing the pressure rod (2), the advancing unit (4) being actuated by means of the actuating lever (3), and an arresting unit (5) for arresting the pressure rod (2). The advancing unit (4) comprises an advancing element (40), which has a serration (41) corresponding to the serration (20) of the pressure rod (2) and is in connection with the actuating lever (3) such that, when the actuating lever (3) pivots, the advancing element (40) is pushed from a starting position along the actuating direction (B) into an end position, the advancing element (40) being in engagement with the serration (20) of the pressure rod (2) at the beginning of the actuation of the actuating lever (3) and over the entire actuating path of the actuating lever (3) and thus moving the pressure rod (2) along the actuating direction (B). The arresting unit (5) comprises an arresting element (50), which is in engagement with the serration (20) of the pressure rod (2) before and after the actuation of the actuating lever (4) and thus blocks the movement thereof in the rearward direction (R).

Description

TITLE

Sealant Press

TECHNICAL AREA

The present invention relates to a press for pressing a viscous medium, such as a sealant or adhesive, according to the preamble of claim 1.

PRIOR ART The press mentioned at the beginning, also called sealant presses, are known from the prior art. It is a pressing device for removing a sealant or an adhesive from a cartridge. In this case, a plunger is pushed into the cartridge by the press and with the advance of the plunger, the sealant or the adhesive is removed.

For example, US 6,260,737 shows such a sealant press in which a plunger provided with a plurality of teeth can be pushed stepwise into a cartridge. A disadvantage of the US 6,260,737 is the blocking of the ram after completion of propulsion. Due to the properties of the sealant this provides a force on the plunger ready. The applied between the brake element and the ram friction force is usually not sufficient to successfully block the plunger. Another disadvantage arises from the fact that the propulsion of the plunger takes place only over a portion of the entire actuating travel of the actuating lever. The user therefore often has difficulty with such an actuating mechanism to dose the mass to be squeezed out.

PRESENTATION OF THE INVENTION

Based on this prior art, the invention is based on the object To provide press for pressing a viscous medium, which overcomes the disadvantages of the presses of the prior art. In particular, the press should allow a more advantageous propulsion and a better blocking of the plunger. This object is achieved by the press according to claim 1. Accordingly, a press for expressing a viscous medium from a cartridge, a receiving space for receiving the cartridge, a pushable into the receiving space ram with a toothing, wherein the plunger is movable along a longitudinal axis in an actuating direction and in an opposite direction of actuation reverse direction, a Operating lever which is pivotable about a pivot point via a pivoting path from an initial position to an end position, a feed unit for advancing the plunger, wherein the feed unit is actuated via the actuating lever, and a locking unit for locking the plunger. The feed unit comprises a feed element which has a toothing corresponding to the toothing of the ratchet and is in communication with the actuating lever, so that the feed element is pushed upon pivoting of the actuating lever from a starting position along the operating direction in an end position, wherein the feed element at the beginning of the operation the actuating lever and over the entire actuation of the actuating lever with the teeth of the plunger is engaged and so moves the plunger along the actuating direction. The locking unit comprises a locking element, which is before and after the actuation of the actuating lever in engagement with the toothing of the plunger and thus blocks its movement in the reverse direction. The fact that the advancing element advances uniformly over the entire actuation path has the positive effect that the plunger is likewise advanced uniformly over the entire actuation of the actuation lever, which permits a particularly advantageous metering. The locking element is also advantageous for preventing backward movement by relaxing the medium in the cartridge.

Preferably, the actuating lever comprises a slotted guide, which is in communication with the feed element, wherein the feed element during pivoting of the actuating lever is pushed from the starting position to the end position along the Betätigungsriehtung. About the slide guide a particularly simple implementation of the movement of the actuating lever can be created on the feed element.

Advantageously, the link guide comprises a first link edge and a second link edge, wherein the first link edge moves the feed element in the actuating direction, and wherein the second link edge moves the feed element in the reverse direction.

Preferably, the first link edge has the shape of a circle segment, the radius of the circle segment seen from the pivot point increases over the entire length of the circle segment, so that the distance between the pivot point and the contact point between the feed element and the first link edge increases over the course of operation. Particularly preferably, the distance between the pivot point and contact point increases continuously over the entire actuation path.

Alternatively, the distance between the fulcrum and the contact point may also increase variably, which allows adjustment of the amount of medium to be squeezed out to the degree of actuation and may also have a positive influence on the ergonomics, since with bent finger position more force than initially available with the finger extended. Thus, for example, at the beginning of the actuation, a smaller enlargement of the distance can be selected, as towards the end of the actuation, which results in an increase in the advance and thus an increase in the extruded quantity via the pivoting path of the actuation lever. A reduction of the distance over the actuation paths would also be conceivable, which then equates to an opposite result.

Preferably, the feed element is pressed by a spring element against the plunger, so that the toothing of the feed element is in engagement with the toothing of the plunger.

Preferably, the locking element is pressed with a spring element against the toothing of the plunger, wherein upon movement of the plunger in the actuating direction a Force against the spring force of the spring element results from the formation of the toothing between the plunger and the locking element, so that the toothed connection between the plunger and the locking element is canceled. Further embodiments are given in the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Preferred embodiments of the invention will now be described with reference to the drawings, which are given by way of illustration only and not by way of limitation. In the drawings show:

Fig. 1 shows a partially sectioned overall view of a sealant press;

Fig. 2 shows a sectional view of a sealant press with a

Drive mechanism according to the present invention, wherein the

Plunger located in the rear position;

Fig. 3 shows the sectional view of Figure 2, wherein the plunger is in a different position;

Fig. 4 shows the sectional view of Figure 2, wherein the actuating lever is in the middle of its operation;

Fig. 5 shows the sectional view of Figure 2, wherein the actuating lever is in the end position;

Fig. 6-7 show the sectional view of Figure 2, wherein the actuating lever is in the return path to its original position;

Fig. 8 shows the sectional view of Figure 2, wherein the actuating lever is located shortly before the original position;

FIG. 9 is a detail view of FIG. 2; FIG. and

Fig. 10 shows the sectional view of Figure 2, wherein the actuating lever is in its original position.

DESCRIPTION OF PREFERRED EMBODIMENTS

FIG. 1 shows a press according to the invention for pressing out a viscous medium, such as a sealant or an adhesive. Such a press can Also referred to as a sealant press or adhesive press. The press essentially comprises a housing 1 with a receiving space 11 for receiving a cartridge from which the viscous medium is pressed out, a pushable into the receiving space plunger 2, an actuating lever 3 which is pivotable about a pivot point D via a Verschwenkweg, a feed unit 4 for advancing the plunger 2, wherein the feed unit is actuated by the actuating lever 3, and a locking unit 5 for locking the plunger second

The housing 1 comprises in addition to the receiving space 11 and a housing portion 10 which is formed in the receiving space 1 and substantially the recording of the operating lever 3, the feed unit 4 and the locking unit 5 is used. The housing portion 10 and the receiving space 11 are preferably formed integrally. Next, the housing portion 10 a extending from the receiving space 11 cavity 12, which serves to receive the plunger 2. The arrangement of the cavity 12 of the plunger 2 is protected from external influences, such as dirt or shocks, which increases the life of the press.

The receiving space 11 extends with a cylindrical cross-section substantially along a longitudinal axis L and serves, as already mentioned, to receive a cartridge. On the opposite side from the housing section 10, the receiving space 11 has an opening 13, via which the cartridge with the sealant can be inserted into the receiving space 11. The receiving space 11 further comprises a stop element 14, which holds the cartridge firmly in the receiving space 11 and provides a stop against the plunger movement. In the present embodiment, the stop element 14 in the form of a spring-loaded rocker, which projects with a stop finger 15 in the region of the opening 13. Preferably, the stop element is arranged in the region of the opening 13.

The plunger 2 is mounted substantially in the housing portion 10 and can be moved along the longitudinal axis L and M, and thus exerts a force on the cartridge, so that the viscous medium is squeezed out of the cartridge. In the present embodiment, the center axis M of the plunger 2 is slightly offset from the longitudinal axis L of the receiving space 11. A collinear arrangement of the two axes and L is also conceivable. The plunger 2 is in an operating direction B to the cartridge or into the receiving space 11 and in a direction opposite to the direction of actuation B reverse direction R out of the receiving space 11 also movable. When moving in the direction of actuation B, the viscous medium can be squeezed out of the cartridge. The plunger 2 essentially comprises a plunger body 21, a toothing 20 which extends along a plunger body 21 and is integrally formed thereon, and a plunger flange 22, which is formed on the plunger 2 in the region of the receiving space 1. The toothing 20 is engaged with the feed unit 4 and the locking unit 5, as will be described below. Due to this design, the plunger 2 can be gradually pushed into the receiving space. For the user, this means that per actuation of the actuating lever 3 is always a same predefined amount is squeezed out of the cartridge.

The actuating lever 3 is in the present embodiment with the housing portion 10 in connection and is pivotable about a pivot point D. The actuating lever 3 is designed so that it acts on the feed unit 4 and actuates it accordingly. For this purpose, the actuating lever 3 on a slotted guide 30. The actuating lever 3 is substantially pivotable from a starting position to an end position. By a restoring element 33, the actuating lever 3 is held in its initial position, as shown in the figure 1, or reset in this, as soon as the user no longer actuates the actuating lever 3. The return element 33 here has the shape of a compression spring. The actuating lever 3 here comprises four optional recesses 34, in which the user can intervene with his fingers.

The feed unit 4 comprises a feed element 40, which is arranged along the longitudinal axis L and at an angle to this movable in the housing portion 10. The feed element 40 comprises a toothing 41, with which the feed element 40 can engage in the toothing 20 of the plunger 2. As can be seen from the figure 2, the toothing 20 is formed so that a force from the feed element 40 on the plunger in the direction of actuation direction B is transferable. The toothed pair 20, 41 is explained in more detail below with the detail view of FIG. Next, a spring element 42 is arranged, which provides a force, so that the advancing element 40 is pressed in the direction of plunger 2. The spring element 42 preferably communicates indirectly with the housing portion 10 and is configured such that the advancing element is movable as described above. The spring element 42 is embedded between the triggering element 6 and the feed unit 4 or the locking unit 5.

Further, the feed element 40 comprises a slide pin 43, which projects into the slotted guide 30 of the actuating lever 3. About this slide pin 43, the force is transmitted from the slotted guide 30 to the feed element 40.

The locking unit 5 here comprises a locking element 50 which is preferably movable perpendicular to the longitudinal axis L or to the plunger and a spring element 51, which presses the locking element 50 in the direction of the plunger 2. The spring element 51 may be integrally formed with the spring element 42, as shown in the figures. A separate version is also conceivable. The locking element 50 and the locking unit 5 essentially serves to lock the plunger 2 against a force in the return direction R. Such a force can take place, for example, by relaxing the viscous medium. The locking element 50 further comprises a toothing 52, which engages in the toothing 20 of the plunger 2. The toothing 52 is designed so that upon movement of the plunger 2 in the actuating direction, ie towards the cartridge, the locking element 50 is moved against the action of the spring force of the spring element 51 away from the plunger.

With reference to FIG. 9, the toothed pairing between the advancing element 40 and the plunger 2 and between the locking element 50 and the plunger 2 will now be explained.

The toothing 20 on the plunger body 2 is formed substantially sawtooth-shaped. Seen from the tooth base 23, a driver flank 24 extends substantially perpendicular to the actuating direction B of the plunger 2 and an angular edge 25 at an angle to the actuating direction B. The angular edge 25 is arranged so that the clear width between the angular edge 25 and driver flank 24 with increasing distance from Tappet body gets bigger. Mitnehmerflanke 24 and angular edge 25 thus form a tooth in the toothing 20th The teeth 41 and the teeth 52 are also formed like a sawtooth. The toothing 41 likewise comprises a driver flank 44 and an angular flank 45, which are arranged analogously to the toothing 20. Consequently, the driver flank 24 of the toothing 20 is in planar contact with the driver flank 44 of the toothing 41. As soon as the feed element 40 is moved along the direction of actuation B, the Mitnehmerflanke 44 transmits a force on the Mitnehmerflanke 24 and the plunger 2 is also moved along the direction of actuation B. During the return movement V of the feed element, ie from the end position to the starting position, the two angular flanks 25 and 45 are in contact with each other. Due to the relative movement between feed element 40 and fixed plunger 2, the angular edge 45 slides on the angular edge 25 and the feed element 40 is pressed at an angle to the plunger in the direction of the starting position, as shown by the arrow V.

The toothing 52 comprises a blocking flank 54 and an angular flank 55. The blocking flank 54 is in contact with the driver flank 24 of the plunger and the angular flank 55 with the corresponding angular flank 25. The locking element 50 is pressed towards the plunger 2 by means of the spring element 51. Upon actuation of the plunger 2 in the direction of actuation B by the feed element 40, the two angular edges 55 and 45 are in surface contact, due to the movement of a force from the angular edge 55 acts on the angular edge 45, so that the locking member 50 from the plunger 2 along the Arrow S is pushed away from the toothing 20. As soon as the locking element 50 is pushed so far away that the two angular flanks 45, 55 are no longer in contact, the spring element 51 pushes the locking element 50 back into the toothing 20. In the resting state, ie when the plunger 2 does not move, the blocking flank 54 stands with the Mitnehmerflanke 24 in contact, and thus provides a lock against displacement of the plunger 2 in the backward direction R ready.

With the figures 3 to 8, the operation sequence of the propulsion of the plunger 2 is now explained in more detail. In FIGS. 2 and 3, all the elements relevant for the movement are in the starting position, the plunger 2 being shown in FIG. 2 at the rearmost position and in FIG. 3 in the front region. Upon actuation of the actuating lever 3, this is pivoted about the pivot point D, wherein the slide guide 30 comes into contact with the crank pin 43 with a first link edge 31. This is represented by the reference numeral 35, which shows the contact point. The actuation of the actuating lever 3 is represented by the arrow 100. The advancing element 40 is displaced from its starting position in the direction of actuation B in the direction of the end position, which is represented by the arrow 101. The locking element 50 is pressed down due to the advance of the plunger 2 as described above, which is represented by the arrow 102.

In the figure 4 can be seen that the distance between the pivot point D and the slide pin 43 is increased with increasing degree of pivoting by the pivoting movement and the shape of the gate edge 31, whereby the feed element 40 is moved in the direction of actuation B, along arrow 101. Due to the engagement between the teeth 20 of the plunger 2 and the teeth 41 of the feed element of the plunger 2 is moved together with the feed element in the direction of actuation B. With reference to FIG. 3, it should also be noted that the plunger is already in a further advanced position than in FIG.

In the figure 5, the actuating lever 3 and also the feed element 40 is in the respective end position. The locking element 50 moves back into the toothing upon reaching the end position and thus locks the plunger against movement in the return direction R, which is represented by the arrow 103. In this position, the distance between the pivot point D and contact point 35 between the first link edge 31 and slide pin 43 is the largest. Consequently, the stroke of the plunger 2 in the direction of actuation B is completed. In the figure 6, the first return movement is shown. As soon as the user now lets go of the actuating lever 3, this is due to the return element 33 is moved from its end position to its starting position, ie against the pivoting movement as just described. The movement of the actuating lever 3 is indicated by arrow 104 shown. In this case, the link pin 43 of the feed element 40 comes into contact with the second link edge 32 of the link guide 30. This is shown in FIG. 5 with the contact point 36. Over the first section, the second gate edge 32 has a constant curvature and over a second section, the curvature increases more, which reduces the distance between the contact point 36 and pivot point D at a smaller Verschwenkweg to a greater degree.

Once the slide pin 43 comes into contact with the second section of the second link edge 32, the feed element is moved from its end position at an angle to the plunger 2 away from the plunger 2 in the direction of the starting position. This is shown in FIG. 7 with the arrow 105. During this movement, the spring element 42 is compressed.

In FIG. 8 it can then be recognized how the advancing element 40 is no longer completely in contact with the plunger. In this position, the second gate edge 32 is substantially perpendicular to the plunger 2, so that the spring element 42 can push the advancing element 40 again in the direction of toothing 20 of the plunger 2, as is illustrated in Figures 7 and 8. This movement sequence just described is represented by the arrows 105 and 106. The end position of the feed element 40 and also of the actuating lever 3 is shown correspondingly in FIG.

During the entire return movement of the feed element, the locking element 5 is in engagement with the toothing 20 of the plunger second

In the figure 8 can be further recognized that in the receiving space a spring-loaded sear 16 is arranged, which engages in an opening 26 on the plunger 2, when this has reached the front end position. So it can be prevented that the plunger 2 can fall out of his leadership. The sear 16 is optionally arranged. When the user pushes the plunger 2 in its starting position, the sear 16 is pressed against the spring force due to the inclined plane 27 in the opening 26.

In the figure 10, the provision of the plunger 2 is shown, which is necessary to replace the cartridge. For this purpose, a trigger element 6 is arranged, which the locking unit 5 and also the feed unit 4 from engagement with the toothing of the Plunger brings so that the plunger 2 is free to move, and can be moved by the user by hand along the backward direction R. Here, the trigger element 6 is moved in the direction of the backward direction R, in which case a corresponding force acts on the locking element 5 and also on the feed element 4, so that they are moved due to the toothing with the plunger 2 from the toothing. This movement is shown by the arrow 107. In a further embodiment, it is also conceivable that the triggering element 6 comprises an inclined plane which brings the feed unit 4 and the locking unit 5 out of engagement with the plunger 2. The two spring elements 42 and 51 may be in communication with the trigger element 6.

The receiving space 11 preferably has a diameter of 25 mm to 75 mm, so that corresponding cartridges can be used. In particular, the receiving space has a diameter of 51 mm.

Typically, a force of 1 Newton to 900 Newton is provided by the plunger 2. Particularly preferred are 400 Newtons.

REFERENCE LIST Housing 32 Second gate edge Plunger 33 Reset element Operating lever 34 Recesses Feed unit 35 Contact point Locking unit 36 Contact point Triggering element

40 Feed element Housing section 41 Gearing Receiving space 42 Spring element Cavity 43 Sliding link Opening 44 Driver flank Stop element 45 Angle edge Stop finger

Sling latch 50 locking element

51 Spring element Gearing 52 Gearing Plunger body 54 Blocking flank Stub flange 55 Angular flank Tooth base

Trailing flank B Operating direction Angle flank R Reverse direction Opening L Longitudinal axis inclined plane M Center axis

D pivot point

link guide

first backdrop edge

Claims

1. Press for pressing a viscous medium from a cartridge, comprising a receiving space (1) for receiving the cartridge, a slide into the receiving space plunger (2) with a toothing (20), wherein the plunger (2) along a longitudinal axis (L ) in an actuating direction (B) and in a direction opposite to the actuating direction (B) reverse direction (R) is movable, an actuating lever (3) which is pivotable about a pivot point (D) via a Verschwenkweg, a feed unit (4) for advancing the Stößels (2), wherein the feed unit (4) via the actuating lever (3) is actuated, and a locking unit (5) for locking the plunger (2), characterized in that

the feed unit (4) comprises a feed element (40) which has a toothing (41) corresponding to the toothing (20) of the plunger (2) and is in communication with the actuating lever (3), so that the feed element (40) during pivoting of the operating lever (3) is pushed from an initial position along the actuating direction (B) in an end position, wherein the advancing element (40) at the beginning of the actuation of the actuating lever (3) and over the entire actuation of the actuating lever (3) with the toothing (20 ) of the plunger (2) is engaged and thus moves the plunger (2) along the actuating direction (B), and that the locking unit (5) comprises a locking element (50), which before and after the actuation of the actuating lever (4) in Engaging with the toothing (20) of the plunger (2) and thus blocks its movement in the reverse direction (R).

2. Press according to claim 1, characterized in that the actuating lever (3) comprises a slotted guide (30) which communicates with the advancing element (40), in particular with a feed element (40) integrally formed pivot pin (43), wherein the feed element (40) is pushed upon pivoting of the actuating lever (3) from the starting position to the end position along the actuating direction (B).

3. Press according to one of the preceding claims, characterized in that the slide guide (30) comprises a first link edge (31) and a second link edge (32), wherein the first link edge (31) the feed element (40) in the actuating direction (B). moved, and wherein the second link edge (32) moves the feed element (40) in the reverse direction.

4. Press according to claim 3, characterized in that the first link edge (31) has the shape of a circle segment, wherein the radius of the circle segment seen from the pivot point (D) increases over the entire length of the circle segment, so that the distance between the pivot point (D) and the contact point (35) between the feed element (40) and first link edge (31) increases over the course of operation.

5. Press according to claim 4, characterized in that the distance between the pivot point (D) and contact point (35) continuously increases over the entire actuation path.

6. Press according to one of the preceding claims, characterized in that the advancing element (40) via a spring element (42) against the plunger (2) is pressed, so that the toothing (41) of the advancing element (40) in engagement with the toothing (20) of the plunger (2).

7. Press according to one of the preceding claims, characterized in that the toothing (20, 41) between the feed element (40) and plunger (2) is formed so that in the actuating direction (B) a power transmission in this direction is allowed.

8. Press according to one of the preceding claims, characterized in that the toothing (20, 41) between the feed element (40) and plunger (2) is formed so that at a relative movement between the feed element (40) and plunger (2) in the reverse direction (R) the toothed connection between the plunger (2) and locking element (50) is released, wherein the advancing element (40) is pushed at an angle from the spline connection.

9. Press according to one of the preceding claims, characterized in that the press comprises a stop element (16, 26) on which the plunger (2) is present in its end position, so that falling out of the plunger (2) is prevented.

10. Press according to one of the preceding claims, characterized in that a trigger element (6) is provided, with which the feed element (40) and the locking element (50) from the toothing (20) of the plunger (2) is movable, so that the plunger (2) is movable in the reverse direction.

11. Press according to one of the preceding claims, characterized in that the locking element (50) with a spring element (42, 51) against the toothing of the plunger (2) is pressed, wherein upon movement of the plunger (2) in the actuating direction (B ) A force against the spring force of the spring element (42, 51) by the formation of the toothing (20, 52) between the plunger (2) and locking element (50) results, so that the toothed connection between plunger (2) and locking element (50) repealed becomes.

12. Press according to one of the preceding claims, characterized in that the spring element (43) of the advancing element (40) is formed integrally with the spring element (51) of the locking element (50).