JPS60151019A - Viscous agent extruder - Google Patents

Abstract

PURPOSE:To extrude without drip at extrusion stopping time nor time lag at extrusion starting time by moving backward an extrusion piston when the extrusion of viscous agent is stopped. CONSTITUTION:Clutch means 59 for moving backward a piston 12 and regulating means 47 for varying the stopping position of an extrusion rod 3 by moving backward are provided. When a switch lever 20 is separated after a motor 7 is driven and the piston 12 of a cartridge 10 is extruded by the rod 3, the rod 3 moves backward. The piston 12 prevents from moving backward by the remaining internal pressure in the viscous agent 13 of the cartridge 10, and the viscous agent 13 prevents from dripping from a nozzle 11. The rotary load of an output shaft 58 can be regulated so that the backward movement of the piston 12 is set that the load of the shaft 58 and the internal pressure of the agent 13 are balanced in the state that a plunger 14 provided at the end of the rod 3 and the piston 12 are not separated, with the result that, when the rod 3 is moved forward, the agent 13 can be immediately extruded from the nozzle 11.

Description

Detailed Description of the Invention [Technical Field 1] The present invention relates to an extrusion device for a thickening agent, and more specifically, a thickening agent having a nozzle at its tip and extruding a thickening agent such as a caulking agent or a sealing agent through the nozzle. This invention relates to an extrusion device.

[Background Art 1] In general, in this type of thickener extrusion device, as shown in FIG.
is moved forward so that the thickening agent 13 held between the piston 12 and the nozzle 11 is pushed out from the nozzle 11, and when the handle 33 is released, the push rod 3 is held in that position. ing. Therefore, when the handle 33 is pulled next time, the thickening agent 13 is immediately pushed out through the seven nozzles 11. However, once the viscosity agent 13 is pressed, internal pressure is stored due to its compressibility, and in this device, the piston 12 is held so as not to retreat, so the stored internal pressure becomes viscous. The agent 13 is forced out of the nozzle 11 to be released.

That is, even when the handle 33 is released, the thickening agent 13 is forced out from the nozzle 11, resulting in what is called a trailing phenomenon.

- The two-unit type is a manual type, but the one shown in Fig. 2 is a mechanism adopted in an electric extrusion device in which the extrusion rod 3 is driven by a motor, and when the switch is turned off, , so that the push rod 3 is not held in that position but can be moved back and forth. In this case, thickener 13
The internal pressure stored in the nozzle 11 is released by retracting the piston 12 rather than extruding the thickening agent 13 from the nozzle 11, so that no dripping occurs as in the case of double piping. However, when the piston 12 retreats due to the internal pressure of the thickening agent 13, the extrusion rod 3 is pushed forcefully, so the plunger 14 provided at the tip of the extrusion rod 3 may separate from the piston 12. There is a gap 34 between the thickening agent 13 and the piston 12.
may occur.

If such a gap 34 occurs, the next time the switch is turned on, there will be a waste in moving the push rod 3 by the gap 34! There is a problem in that there is a time lag between when the switch is turned on and when the thickening agent 13 is pushed out, making it difficult to use.

[Objective of the Invention 1 The present invention has been made in view of the above-mentioned points, and its main purpose is to extrude the thickening agent and stop the extrusion, and then the thickening agent continues to flow out. To provide a thickening agent extrusion device that does not cause dripping (and does not have a time lag until the thickening agent starts to come out when extrusion is started).

[Disclosure 1 of the Invention] Hereinafter, embodiments of the present invention will be described based on the drawings. The thickening agent extrusion device according to the present invention contains and stores a thickening agent 13 such as a caulking agent or a sealing agent in a cylindrical storage portion 6 having a nozzle 11 at one end in the axial direction. The piston 12 and the nozzle 11 are pressed by the extrusion rod 3 that moves from the other axial end of the housing section 6 toward the nozzle 11 by pressing the piston 12 that is disposed in the section 6 so as to be movable along the axial direction. This is a device for extruding the thickening agent 13 contained between the nozzle 11 and the extruding rod 3 when the axially forward pressing force acting on the extruding rod 3 from the driving means 4 is released. The adjusting means 47 has a clamping means 59 that allows the piston 12 to be retracted by the internal pressure remaining in the thickening agent 13 after being separated from the drive means 4, and an adjusting means 47 that makes it possible to vary the position at which the extrusion rod 3 that has been separated from the drive means 4 retreats and stops. It is characterized by having the following.

As shown in FIG. 3, the casing 15 includes a main body 1 having a hand grip 17 extending downward, and a cylindrical holder 2 projecting from the front surface of the main body 1. The front end surface of the holder 2 is open, and a cartridge 10 filled with a thickening agent 13 such as caulking agent or sealing agent is loaded into the holder 2 through this opening. The cartridge 10 is formed in a circular cylindrical shape with a nozzle 11 attached to the front end of the housing part 6 and a rear end closed by a piston 12 that is movable along the axial direction of the housing part 6. .

A thickening agent 13 is filled between the nozzle 11 and the piston 12, and the thickening agent 13 is pushed out from the nozzle 11 by moving the piston 12 forward. At the front end of the holder 2, as shown in FIG.
The rear part of the cover 18 is pivoted below the holder 2 so that it can move vertically, and when the cover 18 is in the upper position, the opening at the tip of the holder 2 is covered leaving an opening for the nozzle 11 to protrude. Therefore, the cartridge 10 is moved to the holder 2.
held within. The piston 12 of the cartridge 10 is
2. It is urged forward by a push rod 3 driven by a drive means 4 housed within the main body 1. The holder 2 is attached with its rear end aligned with an opening for protruding the push rod 3 formed on the front end surface of the main body 1, and is fixed to the main body 1 by a tapping screw 62 that is fixed through the main body 1 and the holder 2. Ru.

The driving means 4 includes a motor 7 and a gear device 5 that transmits the rotational force of the motor 7 to the push rod 3.
is housed in a gear case 9 and housed in the main body 1.

Inside the hand grip 17 is a battery pack 23 as a power source.
is housed in the handgrip 17, and a switch (
(not shown) are provided on the front surface of the hand grip 17, and a switch lever 20 for operating a switch 21 and a lock handle 2 for locking the switch lever 20 are provided.
2 is exposed.

The gear device 5 housed in the gear case 9 is a speed reducer that reduces the rotational output of the motor 7, and a pinion 8 is fixed to an output shaft 58 of the gear device 5. The push rod 3 is composed of a first rack body 31 and a second rack body 32, each of which has rack teeth formed on its upper surface, and the pinion 8 meshes with the rack teeth of each rack body 31, 32 to rotate. According to
The push rod 3 is extended forward. 1st
The rack body 31 has an upwardly opening groove formed in the center of the left and right width direction of the second rack body 32 (an engaging portion is provided at the rear end of the rack body 31 and the front end of the second rack body 32, respectively). (
(not shown) is provided, and as the pinion 8 rotates, only the first rack body 31 that is meshed with the pinion 8 moves forward, and from the first rack body 31 or the second rack body 32 a predetermined amount. When protruding, the first rack body 31 and the second rack body 32
The second rack body 32, which is then engaged with the first rack body 31 and drawn out, meshes with the pinion 8, so that the second rack body 32 moves forward together with the first rack body 31. It looks like this. A plunger 14 is provided at the tip of the pushing rod 3 that advances in this way, and this plunger 14 causes the piston 12 of the cartridge 10 to
is pushed forward. As mentioned above, the extrusion rod 3
Since this is a two-stage telescopic structure in which a pair of rack bodies 31 and 32 are connected in a telescoping structure, the longitudinal length becomes shorter when the push rod 3 is moved backward, and the rear of the main body 1 The rear part of the push-out rod 3 protrudes).

As a result, it is easy to use in narrow spaces.

The gear device 5 utilizes a planetary mechanism, and as shown in FIG. 4, it is constructed by arranging four stages of planetary mechanisms in series. Each planetary mechanism includes a sun gear 50, a planet gear 51 that meshes with the sun gear 50, and an internal gear 52 that meshes with the planet gear 51.
, and a planetary carrier 53 that supports each planetary gear 51, and the sun gears 50 in the second and fourth stage planetary mechanisms from the motor 7 to the pinion 81 are integrated with the planetary carriers 53 in the preceding stage planetary mechanism. It is formed. The pinion 8 is fixed to an output shaft 58 that is integrally provided with a planetary carrier 53 of the planetary mechanism.

The planet carrier 53 of the second stage planetary mechanism and the planet carrier 53 of the third stage planetary mechanism are connected by a pair of spur gears 54. In these planetary mechanisms, the planet gear 51 is rotated by the rotational force input to the sun gear 50, and the internal gear 52 is fixed so as not to rotate, so that the planet gear 51 is rotated around the sun gear 50. The rotation of the planet gear 50 is taken out from the planet carrier 53. Each internal gear 52 of the planetary mechanism from the first stage to the third stage is integrated with the gear case 9 or is fixed to the gear case 9, whereas the internal gear 52 of the planetary mechanism of the final stage is On the outer surface,
As shown in FIGS. 6 and 7, a large number of four parts 55 are provided and are rotatable relative to the gear case 9.

A clutch pin 56 is disposed on the inner periphery of the gear case 9 corresponding to the periphery of the internal gear 52 so as to be movable forward and backward.
When the clutch pin 56 protrudes inside the gear case 9, the tip of the clutch pin 56 engages with one of the four parts 55 of the internal gear 52. A protrusion 26 protruding from the switch lever 20 is engaged with the clutch pin 56, and when the switch lever 20 is pulled toward the handgrip 17 to energize the motor 7, as shown in FIG. As shown in , the clutch pin 56 biased by the engagement spring 57 moves upward and its tip engages one of the four parts 55 of the internal gear 52, and the rotation of the internal gear 52 is stopped. As a result, the rotational force of the motor is reduced in speed and transmitted to the pinion 8 through the four-stage planetary mechanism. On the other hand, when you release your finger from the switch lever 20, the switch 23 turns off and the motor 7 stops, and the spring force of the return spring (not shown) that returns the switch lever 20 causes the protrusion 26 to engage the clutch pin 56. It is pushed down against the matching spring 57, and the engagement between the recess 55 of the internal gear 52 and the clutch pin 56 is released, allowing the internal gear 52 to rotate. In other words, the fourth stage planet having this internal gear 52 is +1! This allows the planetary carrier 53 in the groove to idle, and as a result, the pinion 8 is separated from the motor 7 and can rotate freely. In this way, the clutch means 59 is formed in the final stage planetary mechanism, and the pushing rod 3 and the driving means 4 can be coupled to and separated from each other. Therefore, if the tip of the push rod 3 is pushed backward in this state, the push rod 3 can move backward without rotating the gear mechanism 5, and a small force can move the push rod 3 into the first position.
The rack body 31 and the second rack body 32 can be returned to their original overlapping positions.

An adjustment shaft 40 that rotates coaxially is disposed at the tip of the output shaft 58 of the gear mechanism 5, and a male threaded portion 41 is formed on the outer peripheral surface of the adjustment shaft 40. The male threaded portion 41 is screwed into a female threaded portion 42 formed on the inner peripheral surface of the gear case 5J, and the adjustment shaft 40 is movable along the axial direction of the output shaft 58. A recess 43 is formed in one end surface of the adjustment shaft 40 in the main body 1 in the axial direction, and the output shaft 5 is disposed within the recess 43.
8 is rotatably inserted. An adjustment spring 44 is interposed between the pinion 8 and one end surface of the adjustment shaft 40 in which the recess 43 is formed, and thrust washers 45 are provided at both ends of the adjustment spring 44, respectively.

The other end of the adjustment shaft 40 protrudes from the side of the main body 1 and has a knob 4.
6, and by turning this knob 46, the amount of compression of the adjustment spring 44 can be made variable, thereby making it possible to adjust the pressing force of the thrust washer 45 against the pinion 8. It is something that That is, the magnitude of the load on the rotation of the output shaft 58 can be adjusted by the adjusting means 47 configured in this manner.

Since the present invention has the above-described configuration, when the switch lever 20 is pulled toward the handgrip side, the switch closes the contact, the motor 7 rotates, and the push rod 3 moves forward by its power, and the holder The thickening agent 13 in the cartridge 10 loaded in the cartridge 2 is pushed out, and when all the thickening agent 13 in the cartridge 10 is exhausted and replaced with a new cartridge :) 10, the extrusion rod 3 is not necessary to be retracted by the motor 7;
Simply open the cover 18 at the tip of the holder 2, remove the used cartridge 10, and then
Insert a new cartridge 10 while it is still in the forward position.
It is only necessary to load the holder 2 into the holder 2 through its opening. In this case, if the light switch lever 20 is not pulled, the nion 8 will be in a state where it can rotate freely as described above, so by pushing the new cartridge 10 backward, the push rod 12- will push its tip into the cartridge 10. piston 12
Move back while keeping it in contact with the Therefore, after the loading of the cartridge 10 is completed, the extrusion rod 3 is always in contact with the piston 12 of the cartridge 10, and the thickening agent 13 can be extruded immediately. In addition, when a short cartridge 10 is loaded, or when a cartridge 10 that is in use is loaded, the tip of the extrusion rod 3 can be moved without having to move the extrusion rod 3 backward or forward. Since it is in contact with the piston 12 of the cartridge 10, even in these cases, the action of extruding the thickening agent 13 can be immediately started after loading the cartridge 10 without any effort.

Further, when the switch lever 20 is pulled to drive the motor and the push rod 3 presses the piston 12 of the cartridge 10, the push rod 3 can be moved back when the switch lever 20 is released. Thickener 1
The internal pressure remaining within 3 causes the piston 12 to retreat. In this way, when the switch lever 20 is released, the piston 12
By being able to retreat, the thickening agent 13 is prevented from dripping out of the nozzle 11 due to the internal pressure of the thickening agent 13. Moreover, since the load applied to the output shaft 58 of the gear device can be adjusted according to the amount of rotation of the adjustment shaft 4o, the amount of retraction of the piston 12 is controlled by the plunger 14 provided at the tip of the push rod 3 and the piston. The rotational load on the output shaft 58 can be adjusted so that the load on the output shaft 58 and the internal pressure of the thickening agent 13 are balanced with each other without separating the two.

In other words, after the push rod 3 stops moving forward, the cartridge 1
There is no dripping after the nozzle 11 of 0, and the thickening agent 13 remains
The push rod 3 can be stopped in a state where the push rod 3 does not separate from the piston 12 which is retreating due to the internal pressure. As a result, when the extrusion rod 3 is moved forward, the thickening agent 13 can be immediately extruded through the nozzle 11.
There is no time lag from turning on the switch until the thickening agent 13 is extruded, and the device is comfortable to use.

[Effects of the Invention 1] As described above, the present invention is such that when the driving means releases the axially forward pressing force acting on the extrusion rod, the extrusion rod is separated from the driving means and the internal pressure remaining in the thickener causes the piston to move. It has a clarification means that makes it possible to retract the extrusion rod, and an adjustment means that makes it possible to change the position at which the extrusion rod separated from the drive means retracts and stops, so that when the extrusion rod is extruded and the extrusion is stopped, it is possible to The internal pressure remaining in the thickener to the outside is released by retracting the piston, and as a result, after the extrusion of the thickener is stopped, there is no dripping after the thickener continues to flow out, and the adjustment means The stop position of the extrusion rod can be adjusted to a position where the piston and extrusion rod do not separate, so when you stop extruding the thickener and then start extruding again, the thickener will come out from the moment you turn on the switch. We provide a thickening agent extrusion device that is easy to use and has no time lag before starting.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional example, Fig. 2 is a partial sectional view showing problems in the conventional example, Fig. 3 is a longitudinal sectional view showing one embodiment of the present invention. FIG. 3 is a sectional view of the staircase taken along the line X-X, FIG. 5 is an external perspective view of the same as above, and FIGS. A corresponding sectional view, FIG. 8, is a partial sectional view of the vicinity of the clutch means same as above. 3 is an extrusion rod, 4 is a driving means, 6 is a storage section, 11 is a nozzle, 12 is a piston, 13 is a thickener, 47 is an adjustment means, 5
9 is a clutch means. Agent Patent Attorney Ishi 1) Chief 716- Figure 6 Figure 8 ^A

Claims (2)

[Claims] (1) A viscosity agent such as caulking agent or sealant is stored in a cylindrical housing having a nozzle at one end in the axial direction, and a piston is disposed within the housing so as to be movable along the axial direction. A device that pushes out the thickening agent contained between the piston and the nozzle from the nozzle by pressing the other axial end of the storage part with a push-out rod that moves toward the nozzle, the drive means pushing out the thickening agent from the nozzle. The extrusion rod is separated from the drive means when the axially forward pressing force applied to the extrusion rod is released, and the piston is retracted by the internal pressure remaining in the thickening agent. A device for extruding a thickening agent, characterized by having a reinforcing means that changes the position at which the rod retreats and stops. (2) A patent characterized in that the adjustment means is comprised of an adjustment spring that slides into contact with the output shaft of the drive means and applies a load to the rotation of the output shaft, and an adjustment shaft that adjusts the spring force of the adjustment spring. A thickener extrusion device according to claim 1.