JPH0221302B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention is a method for applying a thickening agent such as a sealant or caulking agent to the gap between joints etc. by extruding it according to the width of the joint for purposes such as waterproofing and heat insulation. This relates to a thickener extruder.

[Background technology]

Traditionally, a pusher rod is driven to push out thickening agents such as caulking and sealing agents from the thickening agent storage chamber to apply them to joints in the exterior walls of prefabricated houses, joints of noncombustible exterior materials, around roofs, and around water areas such as bath units. A thickener extruder for applying around window sash, etc., is known, for example, from Japanese Utility Model Publication No. 11945/1970, but this machine manually drives the extruder rod, so it requires a lot of hands. In addition to being tiring, the extrusion speed of the thickening agent was not stable, resulting in unstable thickness of the thickening agent and a poor finish. In order to solve this drawback, we have developed a motor that has a drive shaft that is a rotational output section housed in a casing, and an extrusion rod that is connected to the drive shaft through a rotation/linear motion conversion means and that operates linearly. For example, a thickener extruder that extrudes thickeners such as caulking agents and sealants from a thickener storage chamber is manufactured by Utility Model No. 58-45851.
It is proposed in the publication. However, there are various types of commercially available thickening agents depending on the application, such as silicone-based, modified silicone-based, polyurethane-based, butyl rubber-based, acrylic-based, oil-based, etc., and each has a different viscosity. In general, silicone-based, modified silicone-based, and acrylic-based materials have low viscosity and are relatively easy to extrude.
Butyl rubber and polyurethane materials are difficult to extrude due to their high viscosity and require a large extrusion force. or,
The viscosity of these materials also changes depending on the temperature, and polyurethane-based materials in particular have a high temperature dependence and require a large extrusion force as the temperature decreases. In addition, thickeners are used for a variety of purposes, such as exterior wall joints of prefabricated houses, joints of noncombustible exterior materials, roofs, water areas such as bath units, and window sills.The width of the joints differs depending on the application, so thickeners are used. When working with thickeners contained in cartridge-type containers,
The work is carried out by cutting the nozzle tip of the container containing the thickening agent to match the width of each joint. The cut inner diameter d of this nozzle (hereinafter referred to as the cutting diameter)
In general, the exterior walls of prefabricated houses, such as joints on the exterior walls, are as large as 8 to 13 mm, while the interior parts, such as bathroom units, are as small as 3 mm, and the extrusion force required to extrude the thickening agent also depends on the cutting diameter of the nozzle. The smaller the cutting diameter d of the nozzle is, the more difficult it becomes to extrude. In this way, the material of the thickener and the cutting diameter of the container nozzle differ depending on the application, and the viscosity of the thickener also varies depending on the season. When applying a thickening agent to the joint, if the viscosity of the thickening agent is low or the cutting diameter of the nozzle of the container is small, the thickening agent will be extruded at a high speed and the thickening agent extruder will be moved along the joint. If the working speed is faster than the extrusion speed of the thickener, there is a disadvantage that the work cannot follow the extrusion speed of the thickening agent, making it inconvenient to use. If the ratio is large, the thickener is extruded at a slow speed, and the thickener extruder must be stopped at a fixed position at the joint, resulting in poor workability. In order to solve this drawback, it is better to provide a rotational speed variable means to vary the rotational speed of the motor, but the amount of change in the motor rotational speed with respect to the operation amount of the operator of the speed variable means is indicated by the broken line in Fig. 5. A thickener extruder equipped with a speed variable means having a linear characteristic as shown has a drawback that it is difficult to use, and this drawback will be explained below with reference to FIGS. 2 and 8 to 10.
In order for the speed variable means A to have linear characteristics, for example, as shown in FIG.
It is sufficient to adopt a variable resistor with a uniform speed, but if this speed variable means (A) is incorporated into a thickener extruder and the thickener 19 is extruded, the operation amount of the operator (C) of the speed variable means (A) and the nozzle The relationship between the discharge speed V 1 of the thickening agent 19 from the tip of the thickening agent 21 and the discharge speed V ₁ is shown in FIG. In FIG. 9, the cutting diameter d of the nozzle 21 is used as a parameter, the horizontal axis is the operation amount of the operator C of the speed variable means A, and the vertical axis is the discharge speed V ₁ of the thickening agent 19 from the tip of the nozzle 21. When a suitable discharge speed V ₁ of the thickening agent 19 is set to 50 mm/sec to 150 mm/sec, the nozzle 2
When the cutting diameter d of No. 1 is 8 mm, the operation amount of the operator C of the speed variable means A can be adjusted over a wide range to the discharge speed V ₁ suitable for the work, but as shown by the solid line, the nozzle 21 cutting diameter d
With a small diameter of 3 mm, the operation amount of the operator C is narrow from scale 1 to scale 2, making it difficult to adjust and making it difficult to use. Operation amount of the operator C of the speed variable means A and the discharge speed of the thickening agent 19
The reason why the above-mentioned drawback occurs when speed variable means A having a linear relationship with V ₁ is used will be explained. When the cutting diameter d of the nozzle 21 in the container 18 of the cartridge-type thickener 19 becomes smaller, the thickener 19
Although the pushing force P required to push out the . The volume Q of the thickening agent 19 near the extrusion rod 3 extruded in 1 second is the same as the volume Q ₁ of the thickening agent 19 expelled from the tip of the nozzle 21 at a speed V ₁ , and
If the inner diameter of the nozzle 8 is D and the cut diameter of the cut tip of the nozzle 21 is d, then the discharge speed V ₁ of the thickening agent 19 from the tip of the nozzle 21 is V ₁ = (D/d) ² V = ( 1/d
) ² D ² V, and the discharge speed V ₁ is directly proportional to the speed of the extrusion rod 3 and inversely proportional to the square of the cutting diameter d of the nozzle 21. Discharge speed V 2 from the tip of the nozzle 21 when the inner diameter d of the nozzle 21 is changed at a rate of kd while keeping the speed V of the extrusion rod ₃ constant.
becomes V ₂ =1/k ² V ₁ . FIG. 10 shows the relationship between the cutting diameter d of the nozzle 21 and the discharge speed V 1 of the thickening agent ₁₉ when the speed V of the extrusion rod 3 is constant using V ₂ =1/k ² V ₁ . This is a diagram in which the power of the motor 2 is large and the load characteristics of the motor 2 are ignored. As shown in FIG. 10, the relationship between the cutting diameter d of the nozzle 21 and the discharge speed V ₁ of the thickening agent 19 is as follows: When the cutting diameter d is in a large range of 5 mm to 13 mm, the amount of change in the cutting diameter d becomes △d. Discharge speed
The amount of change △v in V ₁ and the ratio △v/△d are small, but as the cutting diameter d becomes smaller than 4 mm, △v/△d increases rapidly, and the amount of change △d in the cutting diameter d The relationship between the amount of change Δv in the discharge speed V ₁ and the amount of change Δv in the discharge velocity V 1 is theoretically not a linear relationship but inversely proportional to the square of Δd. In a thickener extruder equipped with a speed variable means (A) having linear characteristics, the rotational speed of the motor 2 is changed by operating the operator (C) of the speed variable means (A), and the speed v of the extrusion rod 3 is changed. Although it is possible to adjust the discharge speed VV ₁ of the thickener, the relationship between the amount of change Δd in the cutting diameter d of the nozzle 21 and the amount of change Δv in the discharge speed V ₁ of the thickener 19 is determined by the nozzle 21. Since the change in the cutting diameter d of the nozzle 21 is inversely proportional to the square of the change △d, in a range where the cutting diameter d of the nozzle 21 is small, the change △d in the cutting diameter d of the nozzle 21 and the thickening agent 19 change in a square relationship. Discharge speed of V ₁
As shown in FIG. 9, the discharge speed of the thickening agent 19 suitable for the work V ₁
This means that the operating range of the operator C that can obtain the desired results becomes smaller.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a thickener extruder that is easy to use and has good workability.

[Disclosure of the invention]

Examples Examples of the thickener extruder of the present invention will be described below with reference to FIGS. 1 to 5. The casing 1 is made of synthetic resin, and the motor 2 and
An extrusion rod 3 that is connected to the drive shaft of the motor 2 via a rotation/linear motion conversion means and operates linearly, and a cylindrical body 5 that accommodates a storage battery 4 that serves as a power source for the motor 2 and also accommodates the extrusion rod 3. is fixed with screw 6. A rack 7 is formed on the push rod 3, and a gear 8 meshing with the rack 7 is connected to the drive shaft of the motor 2 via a speed reduction means (not shown). By making the resistance value variable between the anode of the drive shaft of the motor 2 and the anode of the storage battery 4, the motor 2
A speed variable means 9 is connected to which the extrusion speed of the extrusion rod 3 can be varied by varying the current flowing through the extrusion rod 3. The speed variable means 9 is a carbon-based variable resistor,
It is composed of an operating element 10 protruding to the outside of the casing 1, a sliding contact 11 connected to the operating element 10, and a resistor 12 with which the sliding contact 11 comes into sliding contact.
First terminal 13 and second terminal 1 of resistor 12
4. The sliding contacts 11 are each connected to a motor speed control circuit 15. The resistor 12 is formed into a substantially semicircular shape with uneven thickness, with the width B gradually increasing from the first terminal 13 to the second terminal 14, and as shown by the solid line in FIG. The resistance value between the first terminal 13 of 12 and the sliding contact 11 is 2 with respect to the amount of change in the rotation angle θ of the sliding contact 11.
It has a parabolic nonlinear characteristic that gradually increases in approximation to a multiplicative curve. A power switch 16 is connected between the cathode of the motor 2 and the cathode of the storage battery 4.
MOSFET17 is connected and MOSFET1
7 is connected to a motor speed control circuit 15. A thickener storage chamber 20 is formed inside the cylinder 5 to accommodate a thickener 19 contained in a cartridge-type container 18 . Thickening agent 19
Depending on the application, the main ingredients are silicone-based, modified silicone-based, polyurethane-based, butyl rubber-based, acrylic-based, and oil-based. The container 18 is provided with a nozzle 21 at one end and a bottom lid 22 at the other end, and the bottom lid 22 is adapted to slide on the inner wall of the container 18 by being pushed by the pushing rod 3. There is. An opening 23 at the tip of the cylindrical body 5 is provided at the tip of the cylindrical body 5.
A lid 24 covering the opening 23 is rotatably supported by a shaft 25 so that the container 18 inserted therein does not come off. Next, the speed variable range of the speed variable means 9 will be explained with reference to FIGS. 2 and 6.
When the cutting diameter d of the nozzle 21 of the container 18 becomes smaller, the extrusion force P required to extrude the thickening agent 19 decreases.
becomes large, but the power of the motor 2 is sufficiently large compared to the pushing force P, and the pushing force P causes the container 18
Under the condition that the extruder 19 does not expand, the volume Q of the thickening agent 19 near the extruding rod 3 pushed out in one second by the extruding rod 3 moving at a speed V is equal to the volume Q of the thickening agent 19 expelled from the tip of the nozzle 21 at a speed V ₁ The volume Q is the same as ₁ , the inner diameter of the container 18 is D, and the cut diameter of the cut tip of the nozzle 21 is d, then the nozzle 2
The discharge speed V ₁ of the thickener 19 from the tip of the thickener 19 is V ₁ =
(D/d) ² V=(1/d) ² D ² V, and the discharge speed V ₁ is directly proportional to the speed of the extrusion rod 3 and inversely proportional to the square of the cutting diameter d of the nozzle 21. Extrusion rod 3
Keeping the speed V constant, the inner diameter d of the nozzle 21 is kd
The ejection velocity V ₂ from the tip of the nozzle 21 when changed at the rate of V ₂ =1/k ² V ₁ . In FIG. 6, what is shown by a solid line is the cutting diameter d of the nozzle 21 and the discharge speed V ¹ of the thickener 19 using the speed V of the extrusion rod 3 as a parameter and the above-mentioned V ₂ = ₁ /k 2 V ₁ . This is a diagram showing the relationship between the two, in which the power of the motor 2 is large and the load characteristics of the motor 2, etc. are ignored. The diagram shows the cutting diameter d of the nozzle 21 and the thickening agent 19 at a speed V of the extrusion rod 3 where the discharging speed V ₁ of the thickening agent 19 is 150 mm/sec when the cutting diameter d of the nozzle 21 is 13 mm. The relationship between the discharge speed V1 and the discharge speed _V1 is shown. The diagram shows the thickening agent 1 when the cutting diameter d of the nozzle 21 is 3 mm.
9 shows the relationship between the cutting diameter d of the nozzle 21 and the discharge speed V ₁ of the thickening agent 19 at a speed V of the extrusion rod 3 such that the discharge speed V ₁ of the thickening agent 19 is 50 mm. To explain why the cutting diameter d of the nozzle 21 is 13 mm to 3 mm, the width of exterior-related joints such as external wall joints of prefabricated houses is 8 mm to 13 mm (standard 8 mm).
Judging from the size of the nozzle 21 of the commercially available cartridge type thickening agent 19, the cutting diameter d of the nozzle 21 is set to a maximum of 13 mm. In addition, the joint width for interior fittings around water in bath units, etc. is 2 mm to 3 mm, and the cut nozzle 21 is actually measured to have a minimum width of 3 mm.
The cutting diameter d is set. The discharge speed V ₁ of the thickening agent 19 suitable for the work is 50 mm/sec to 150 mm/sec.
To explain why we are using millimeters per second, there is a limit to the speed at which the thickener extruder can be moved along the joint, estimated at 250 millimeters per second, of which the appropriate speed for the job is actually The speed was set from 50 mm/sec to 150 mm/sec by observing the work site.
When the cutting diameter d of the nozzle 21 is set to 13 mm, the discharge speed V ₁ of the thickener 19 becomes 150 mm/sec, and when the cutting diameter d of the nozzle 21 is set to 3 mm, Thickener 1
By making the speed V of the push rod 3 variable between the speed V of the extrusion rod 3 where the discharge speed V ₁ of 9 is 50 mm/sec, it is possible to provide a thickener extruder that can be adapted to any work. be. When the cutting diameter d of the nozzle 21 is 13 mm, the thickener 1
If the speed V of the extrusion rod ₃ is 1, the discharge speed V ₁ of the thickening agent 19 is 150 mm/sec, and the cutting diameter d of the nozzle 21 is 3 mm. The speed V of the extrusion rod 3 in seconds becomes 1/56 times. Converting this to the speed V of the extrusion rod 3, since the inner diameter D of the container 18 of the commercially available cartridge type thickener 19 is approximately 47 mm, V ₁ = (D/d) ² V When the cutting diameter d of the nozzle 12 is set to 13 mm, the extrusion rod 3's extrusion speed _V1 becomes 150 mm/sec, and the extrusion rod 3's speed V becomes 11.4 mm/sec. 1/56 is 0.2 mm/sec, and the conditions of the speed variable means 9 may be set so that the speed V of the extrusion rod 3 can be varied within the range of 11.4 mm/sec to 0.2 mm/sec. Diagram 3 in FIG. 6 is a calculation of the cutting diameter d of the nozzle 21 and the discharge speed V ₁ of the thickening agent 19 when the speed V of the extrusion rod 3 is 1/12 times that of diagram 1. , the speed V of the extrusion rod 3 was set to 1 mm/sec, and the thickening agent 1 was actually
Comparing with diagram 4 in which 9 is extruded, when the cutting diameter d of the nozzle 21 is 4 mm or more, the thickening agent 1
9 was extruded smoothly, and line 4 is similar to line 3. Although the speed variable means 9 has been described using a variable resistor as an example, the operator for varying the speed of a continuously variable transmission using a conical pulley may be operated by an eccentric cam whose radius gradually increases. You may also do so. Further, although only one variable resistor is provided as the speed variable means 9, a second variable resistor may be provided in series with the first variable resistor for fine adjustment.

(Operation) Next, regarding the operation state of the present invention, FIGS.
This will be explained with reference to FIGS. 7 and 10. When the power switch 16 is operated, the motor 2 is rotated and the push rod 3 is driven. When the operator 10 of the speed variable means 9 is operated, the sliding contact 11 is connected to the resistor 1.
2, the current flowing from the storage battery 4 to the motor 2 changes depending on the resistance between the first terminal 13 and the sliding contact 11, and the speed of the motor 2 can be made variable. As shown in FIG. 5, the speed variable means 9 has a parabolic nonlinear characteristic in which the amount of change in speed with respect to the amount of operation of the operator 10 gradually increases, so the resistance value is large and the speed of the motor 2 is slow. In this range, the ratio of the amount of change in the resistance value to the amount of operation of the operator 10 becomes small, and as shown in FIG _. When working with a small cutting diameter d of the nozzle 21, which changes greatly, the resistance value is set to a large value, so the operator 1 of the speed variable means 9 is set as shown by the solid line in FIG.
The amount of change in the discharge speed of the thickening agent 19 with respect to the operation amount of 0 becomes small, and can be finely adjusted. In the range where the resistance value of the speed variable means is small and the speed of the motor 2 is high, as shown in FIG. Since the discharge speed V ₁ is set to a high side during the work, fine adjustment of the discharge speed V ₁ of the thickener 19 is not necessary, and the cutting diameter d of the nozzle 21 is 5 mm or more as shown in Fig. 10. Then, since the amount of change in the discharge speed _V1 of the viscous agent 19 with respect to the amount of change in the cutting diameter d of the nozzle 21 is small, the viscosity is not significantly affected and is approximately the same as in the case of a speed variable means having linear characteristics. The discharge speed V ₁ of the thickener 19 can be adjusted, and when the cutting diameter d of the nozzle 21 is 8 mm, the entire range of the operation amount of the operator 10 of the speed variable means 9 can be adjusted as shown by the dashed line in FIG. Thus, the discharge speed _V1 of the thickening agent 19 can be adjusted to a speed suitable for the work.

〔Effect of the invention〕

As described above, the thickener extruder according to the present invention includes a motor having a drive shaft serving as a rotational output part, and a motor having a drive shaft that operates linearly to extrude a thickener such as a caulking agent or a sealant. A thickener extruder comprising: a casing housing an extrusion rod connected to the motor via a rotary/linear operation converting means, and further comprising an operator of a speed variable means for varying the rotational speed of the motor, the casing comprising: In the above, the speed variable means is characterized by having a parabolic nonlinear characteristic in which the amount of change in the rotational speed of the motor with respect to the operation amount of the operator gradually increases. The discharging speed of the thickening agent changes greatly depending on the amount of change in the cutting diameter. Even when working with a small cutting diameter of the nozzle, the amount of change in the discharging speed of the thickening agent with respect to the operation amount of the operator of the speed variable means. The effect is that it is easy to use because it can be made small and finely adjusted.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of the thickener extruder of the present invention;
Figure 2 is a cross-sectional side view of the same thickener extruder as above;
Figure 3 is a circuit diagram of the same thickener extruder as above, Figure 4 is a schematic diagram of the speed variable means incorporated in the same thickener extruder as above, and Figure 5 shows the characteristics of the speed variable means as above. Graph, FIG. 6 is a graph showing the relationship between the cutting diameter of the thickening agent nozzle and the thickening agent discharge speed, FIG. 7 is a graph showing the characteristics of the thickening agent extruder of the present invention, and FIG. FIG. 9 is a schematic diagram of a speed variable means having linear characteristics corresponding to FIG. 4; FIG. 9 is a graph showing the characteristics of a thickener extruder having linear characteristics corresponding to FIG. 7;
FIG. 10 is a graph showing the relationship between the cutting diameter of the thickener nozzle and the discharge speed of the thickener. DESCRIPTION OF SYMBOLS 1... Casing, 2... Motor, 3... Extrusion rod, 9... Speed variable means, 10... Operator, 19
...Thickening agent.

Claims (1)

[Claims] 1. A motor having a drive shaft serving as a rotation output section;
An extrusion rod connected to the drive shaft via a rotation/linear motion conversion means so as to operate linearly in order to extrude a viscous agent such as a caulking agent or a sealant is housed in a casing, and the extrusion rod is further adapted to rotate the motor. In a thickener extruder, the casing is equipped with an operator of a speed variable means for changing the speed,
The thickener extruder is characterized in that the speed variable means has a parabolic nonlinear characteristic in which the amount of change in the rotational speed of the motor with respect to the operation amount of the operator gradually increases. 2. The speed variable means is a variable resistor provided between the motor and the power source, and the width of a resistor constituting the variable resistor is gradually widened. The thickener extruder according to item 1.