JPS58135384A - Pump device - Google Patents

Abstract

PURPOSE:To prevent locking up of a pump driving shaft, by connecting a chamber charged with an anti-hardening agent hermetically to an opening of a hole into which the pump driving shaft is to be inserted, and thereby preventing intrusion of open air into said hole. CONSTITUTION:A chamber 4 charged with an anti-hardening agent is connected to an opening 131 of a hole 13 into which a piston rod 3 is to be inserted, and an anti-hardening agent is charged into the chamber 4. With such an arrangement, it is enabled to prevent intrusion of open air into the hole 13 and to prevent hardening of the material forced out along the hole 13 by the function of the anti-hardening agent. Therefore, it is enabled to prevent locking up of a piston rod 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pump device useful for pumping fluid materials that harden upon exposure to air.

In general, there are many cases in which fluid materials that harden when exposed to air are fed. For example, in order to bond glass fiber-reinforced plastic materials called FRP to each other, or FRP and metal to each other, (2) a two-component adhesive consisting of a base agent and a hardening agent is preferably used. However, some adhesives of this type harden due to moisture in the air when the base material comes into contact with air, and this is the case when this adhesive is fed for bonding purposes.

On the other hand, a pump device is normally used as a means for feeding fluid materials, and in general, in a pump device, a drive shaft such as a piston rod divides the pump chamber in order to transmit driving force into the pump chamber. Since the pump is inserted into the pump chamber through the insertion hole, and pressure is applied to the fluid in the pump chamber to push it out, sealing means such as an O-ring is provided in the insertion hole of the case. However, it is impossible to avoid the fluid inside the pump chamber leaking out through the insertion hole due to repeated use.

By the way, when a hardening fluid material is fed by a pump device, the fluid material that seeps out comes into contact with air and hardens, resulting in the drive shaft not moving, which ultimately significantly reduces its service life. (3) In particular, when extruding a highly viscous fluid material such as the main ingredient of a two-component adhesive, a large extrusion force is required, so it is difficult to prevent leaching of the fluid material. Since the degree of damage increases, a long service life cannot be obtained.

The present invention was made based on this background, and an object of the present invention is to provide a pump device that can obtain a long service life when delivering a fluid material that hardens when exposed to air. A case that defines a pump chamber in which a hardenable fluid material is housed, a pump drive shaft inserted into the pump chamber from the outside through an insertion hole in the case, and a pump drive shaft inserted through the insertion hole outside the pump chamber. The invention further comprises a fluid material hardening inhibitor filling chamber, which is airtightly connected to the opening of the hole and through which the pump drive shaft passes.

Examples of the present invention will be described below.

FIG. 1 is a vertical sectional side view showing an embodiment in which the present invention is applied to a piston type pump device, and in the figure, 11 is a container lO for storing a hardenable fluid material (hereinafter referred to as "material").
A cylindrical portion 12 that protrudes from the upper surface of the cylinder is a cylinder.

In this embodiment, the cylindrical portion 11 and the cylindrical portion 11
A cylinder 12 fitted from the inside of the container 10 constitutes a case 1 that partitions a pump chamber 2 in which material is stored, and the pump chamber 2 has an insertion hole 13 formed in the cylindrical portion 11. A piston rod serving as a pump drive shaft is inserted from the outside through the pump so as to be able to reciprocate. The cylindrical body 5 through which the piston rod 3 is passed is inserted into the insertion hole 13 in the case 1 by screwing the reduced cylindrical part 51 formed at the bottom of the cylindrical body 5 into the insertion hole 13. Between the piston rod 3 and the lid portion 52 that is airtightly connected to the opening 131 of the insertion hole 13 via an O-ring 54 and forms the upper surface of the cylindrical body 5, there is provided an airtight connection between the piston rod 3 and the outside. An O-ring 53 for sealing is provided, and the internal space of the cylindrical body 5 thus provided forms a fluid material hardening inhibitor filling chamber 4 (hereinafter referred to as "hardening inhibitor filling chamber"),
For this purpose, when using a two-component adhesive with a urethane resin as the main component (5), for example, a fluid material hardening inhibitor (hereinafter referred to as "hardening inhibitor") consisting of dioctyl phthalate may be used. Fill. 55 is a stopper member.

The mechanism for sending the material from the pump chamber 2 is a known one, and in the figure, 31 is the first rod, 32 is the first rod 31.
33 is a piston portion having a diameter larger than that of the 20th tube 32; 21 is a material suction port; 22 is a material discharge port; 23 is slidably fitted onto the piston rod 3; This shows a check valve member that moves up and down together with the rod 3. In this mechanism, when the piston rod 3 moves up, the inside of the pump chamber 2 is pressurized due to the difference between the diameter of the piston part 33 and the diameter of the 20th tube 32. On the other hand, when the piston rod 3 descends, the inside of the pump chamber 2 is pressurized due to the difference between the diameter of the 20th tube 32 and the diameter of the 10th tube 31, and the material is discharged from the material discharge port 22. While being discharged from the discharge port 22, the check valve member 23 is activated, and as the piston portion 33 descends, negative pressure (
6) The following occurs and the material is sucked in from the material suction port -21.

Therefore, in an embodiment with such a configuration, the insertion hole 13
Since the anti-curing agent filling chamber 4 is airtightly connected to the opening 131 of the opening 131, by filling the anti-curing agent filling chamber 4 with the anti-curing agent, outside air will not enter into the insertion hole 13. Moreover, the material seeped out along the insertion hole 13 is prevented from hardening by being swollen by the hardening inhibitor, and therefore the piston rod 3 can be prevented from becoming stuck, resulting in a long service life. I can do it.

Although the above-mentioned embodiment is an example in which the present invention is applied to a piston type pump device, the present invention is not limited thereto. The present invention may be applied to a pump device having a configuration in which a rotary blade for extruding material in a pump chamber is provided at the tip of a shaft.

Next, an example of a metering dispensing machine suitably using the pump device of the present invention will be explained. Fig. 2 is an overview diagram showing a metering dispensing machine (7) used for, for example, two-component adhesives. In this example, a piston-type base agent pump device 6 having a configuration similar to that shown in FIG. A piston-type curing agent pump device 61 having a configuration similar to that shown in FIG. Then, the main agent feed pipe 61 and the hardener feed pipe 61' are connected to the material discharge port in the base agent pump device [6] and the material discharge port in the hardener pump device 61, and the main agent feed pipe 61' 61 and the tip of the curing agent feed pipe 61' are connected to a mixer 8 for mixing and discharging the base resin and the curing agent, thereby constructing a fixed-quantity dispensing machine. 62 is a cylinder,
63.63' indicates the piston rod.

In FIG. 2, reference numerals 71 and 71' denote fixed rods 72 and 72', actuating arms 73, which are operated using connection points with the fixed rods 71 and 71' as fulcrums. "13" is the operating rod, 74
, 74' is a rotating rod, 75 is a motor, and 76 is a motor JP-A-1985.
8-135384 (3) This is a transmission mechanism that transmits the driving force of the lever 75 to the rotation rods 74 and 74', and these parts and mechanisms constitute the drive mechanism 7.

The mixer 8 includes a main agent introduction pipe 81 connected to a main agent feed pipe 61 and a hardening agent introduction pipe 81 connected to a hardening agent feed pipe 611, which are provided on one side of the mixer main body 82.
' and the on-off valves (described later) provided in the cleaning agent introduction pipe 83 connected to the cleaning agent feeding mechanism (not shown), the main agent introduction pipe 81, and the curing agent introduction pipe 81', respectively. An operation lever 84 that is operated in conjunction with an operation lever 84 and an outlet provided on the other side of the mixer main body 82 that mix and draw out the base agent from the base agent introduction pipe 81 and the hardening agent from the hardening agent introduction pipe 81'. A mixing feed mechanism called a static mixer is used, in which metal pieces twisted clockwise and metal pieces twisted counterclockwise are alternately connected in the axial direction and are press-fitted into a pipe 85, for example, a pipe. Outlet pipe 8 consisting of
5.

FIG. 3 is a side view showing details of the mixer 8, and FIG. 4 is a side view showing details of the mixer 8.
It is a sectional view taken along the line I-1 in FIG. 3, (9) 86, 86' and 87 in the figure are on-off valves (however, the on-off valve 861 is provided in the curing agent introduction pipe 811) 861° 861' , 871 is a check valve (however, check valve 8611
is provided in the curing agent introduction pipe 81'. ), 872
88 is a limit switch; 89 is a grip; 800 is a cleaning agent passage;
01 is a main agent passage, and 802 is a curing agent passage.

In the mixer 8 in this example, when the operating lever 84 is in the rear position (indicated by a solid line) as shown in FIG. 88 is deactivated to bring the drive mechanism 7 to a stopped state, while the operating lever 8
4 is in the forward position (indicated by the two-dot chain line), both the on-off valves 86 and 86' are opened, and
The limit switch 88 is configured to be activated by pressing the operating lever 84, thereby activating the drive mechanism 7. In this way, the on-off valve 86°861
If the structure is such that the drive mechanism 7 and the drive mechanism 7 are interlocked, there is an advantage that when the drive mechanism 7 is in operation, the open/close valves 86 and 86' are always fully open, so there is no risk of an explosion. be. Furthermore, the mixer 8 in this example has the mixer main body 82 as shown in FIG.
Inside, the cleaning agent passage 800 is connected to the outlet of the main agent introduction pipe 81, that is, the inlet of the main agent passage 801. With this configuration, the main agent passage 801 is cleaned by the cleaning agent from the cleaning passage 800, thereby preventing an accident in which the main agent hardens and blocks the main agent passage 801 after using the device. can do.

Here, in setting the mixing ratio of the main resin and the curing agent, the diameters of the 10th prong 31, the 20th prong 32, and the piston portion 33 in the piston rod 3 are determined in FIG. Since the amount of material delivered by the stroke is determined, a predetermined mixing ratio can always be obtained by setting the diameters of the base agent pump device 6 and the curing agent pump device 6' to predetermined sizes, respectively. Therefore, the tolerance range for the above mixing ratio is strict (
11) It can be suitably used when discharging two-component adhesives of the following types. Furthermore, in setting the above mixing ratio, C
5. Actuation arms 72, 72' in the drive mechanism 7
The force point position, that is, the operating arm 72° 721 and the operating rod 73
, 73', the position of the connection point with the actuating arms 72, 7
2' have mounting holes for multiple connections on the actuating arms 72, 72.
By configuring it so that it can be changed by providing it along the length direction, etc., it is possible to always obtain a predetermined mixing ratio, and in this case, the diameter of the piston rod 3, etc. If combined with a method of changing the mixing ratio, fine adjustment of the mixing ratio can be made.

Here, we will explain how to prevent clogging in the mixer 8 due to hardening of the material when the dispensing operation is stopped for a long time or a short time.When the operation of the mixer 8 is stopped for a long time, By stopping the drive mechanism 7 and opening the on-off valve 87 in the cleaning agent introduction pipe 83, the inside of the mixer 8 is cleaned by the cleaning agent such as a solvent from the cleaning agent introduction pipe 83. There is no risk that the material will harden during the process, but if the pause is for a short period of time, for example about 5 minutes, the holder 9 of the mixer 8 as shown in FIG.
It is preferable to use That is, 91 in Fig. 5 is the base;
Reference numeral 92 indicates a holding frame, 93 indicates a container, and 94 indicates a switch piece of a limit switch that intermittently operates the drive mechanism 7 via a control mechanism (not shown).
The mixer 8 is positioned so that when it is placed in the holding position of the holder 9, it is pressed by the outlet pipe 85 and is activated. If such a holder 9 is used, the material will be delivered intermittently by placing the mixer 8 in the holding position, so the material will not harden in the mixer 8, and moreover, the introduction of cleaning agent will be prevented. Opening/closing lever 87 of pipe 83
This method is convenient because it eliminates the need to operate 2.

Note that the quantitative dispensing machine having the above configuration is not limited to dispensing a two-component adhesive, but can be used to mix and dispensing different fluid materials.
Of course, by connecting one material supply system to the mixer, it can be used to discharge one type of material (13).

According to the present invention, the anti-hardening agent filling chamber is airtightly connected to the opening of the insertion hole through which the pump drive shaft is inserted. Outside air does not enter into the hole, and the material that seeps out along the insertion hole is prevented from hardening by the hardening agent, which prevents the pump drive shaft from getting stuck, resulting in a long service life. Obtainable.

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view showing an embodiment of the pump device of the present invention, Fig. 2 is an overview diagram showing a metering dispenser using the pump device of the present invention, and Fig. 3 is a mixing device used in the metering dispenser. FIG. 4 is a sectional view taken along the line T in FIG. 3, and FIG. 5 is an explanatory view showing the holder of the mixer. 1... Case 11... Cylindrical portion 12... Cylinder 13... Insertion hole 131... Opening 2... Pump chamber '21... Material suction port
22... Material discharge port (14) 23... Check valve member 3... Piston rod 4.
... Fluid material hardening inhibitor filling chamber 5 ... Cylindrical body 53.54 ... O-ring 6
... Pump device for main agent 61 ... Pump device for hardening agent 60 ... Container for main agent 601 ... Container for hardening agent 7
... Drive mechanism 8 ... Mixer 81 ... Main agent introduction pipe 81' ... Curing agent introduction pipe 83 ... Cleaning agent introduction pipe 84 ... Operation lever 85 ... Output pipe 88...
Limit switch 800...Cleaning agent passage 801...Main agent passage 80
2...Curing agent passage 9...Holder 94...Switch piece agent Patent attorney Masahiko Oi

Claims (1)

[Claims] (1) A case defining a pump chamber in which a curable fluid material is housed, a pump drive shaft inserted into the pump chamber from the outside through an insertion hole in the case, and an insertion hole located outside the pump chamber. A pump device comprising: a fluid material hardening inhibitor filling chamber airtightly connected to an opening of the pump drive shaft, through which the pump drive shaft passes.