JP2580826Y2 - Color and sealant coating device for propulsion pipe - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collar for a propulsion pipe (hereinafter abbreviated as a collar) and a sealant applying apparatus for applying a sealant which is one element of the collar.

[0002]

2. Description of the Related Art In modern large-scale burial of sewer pipes and other pipes, a propulsion pipe method using a shield method is often used. In this method, a method is used in which a propulsion pipe corresponding to a segment in the shield method is connected after the leading excavation blade, and as the excavation progresses, the next pipe body is successively connected via a collar and pushed in with a jack. .
In this case, when the excavation is in a place with poor soil quality such as a riverbed, it is necessary to pressurize the inside of the pipe in order to avoid water leakage, so that the connection portion needs to be airtight.

[0003]

However, in the conventional plunger type discharge device for applying a sealant, if the sealant has a high viscosity, the application of the sealant lacks stability, and the bead breaks or pulsates, resulting in continuous application. Is impossible to apply. As a result, watertightness is not maintained. There is also a method of applying pressure from behind with a one-part urethane cartridge type using an air gun, but there is a problem in productivity and cost. By the way, the currently used propulsion pipe is shown in FIG.
The copper plate collar 1 'is fitted around the body 4 made of fume tube as shown in Fig. 4, but concrete has considerable shrinkage (1: 2 mortar and 0.1% or more in the length direction). On the other hand, since the steel material constituting the collar does not actually shrink or expand, even if the expansion agent is added to compensate for the shrinkage of the concrete, the inner wall of the collar 1 ′ and the outer peripheral surface of the connecting portion of the fume pipe 4 may sometimes be damaged. Not only does a narrow gap G occur between the two, lowering the water tightness, but also the collar causes rattling with respect to the main body 4, and in extreme cases, the collar deviates from a predetermined position,
It may fall out.

Therefore, the water-absorbing rubber 8 is stuck to the inner surface of the collar. However, even if it is useful for enhancing the sealing effect, there is no effect of mechanically connecting the collar and the fume tube main body. . In addition, there is a risk that the propulsion tube will be peeled off during the manufacturing process.

[0005]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention has no risk of rattling or falling off due to a change in the amount of shrinkage of the fume tube main body, has complete airtightness, and has a complete manufacturing process. An object of the present invention is to provide a structure of a collar which does not have a possibility of peeling off, and an application device for applying a sealant which is a constituent element to the collar.

[0006]

Means for Solving the Problems (1) Outline In order to solve the above problems, the present invention provides (A) a plurality of annular ribs unevenly distributed on the inner surface of a narrow metal cylinder, A propulsion pipe collar, which is provided with an annular sealant positioned in the middle, and (B) a piston substantially equal to the inner diameter of the cylindrical container containing the fluid sealant, and a hole passing through a part of the piston. A connected conduit with a nozzle,
The gist of the present invention is a sealant applying device for applying a sealant to a collar, which comprises a means for applying a pressing force of the piston and a pair of co-rotating horizontal drive rollers. Hereinafter, the various elements constituting the present invention will be described separately.

(2) Color The material of the collar according to the present invention is the same as that of a conventional steel plate collar, but has a characteristic configuration in which a plurality of ribs are unevenly distributed on the inner surface. Here, "distributed" means that the rib is deviated to either side from a bisecting plane parallel to the axial center plane of the collar. The rib is preferably a square bar in terms of strength, but it is appropriate to weld a round bar in consideration of workability. The height of the rib is preferably about 3 to 10 mm from the viewpoint of practicality. In addition, the number of ribs is usually two, but can be increased to three or more if necessary.

(3) Sealant The sealant is annularly applied along the inner wall of the collar between the ribs. This may be a known rubber compound containing a high water-absorbing resin or a hydrophilic polyurethane.However, from the viewpoints of adhesiveness to a color, water absorption speed, prevention of bleeding at the time of water absorption, and prevention of deformation after water absorption, an unvulcanized rubber is used. Those having a consistency of toothpaste containing a hydrophilic polyurethane and a highly water-absorbent resin reactive with the polyurethane are preferred. For example, a mixture of the same amount of a highly water-absorbent resin and a reaction product of a hydrophilic urethane and a rubber base material mixed with about half of a filler is left in air of 65% ^R / _H for 6 months. However, it does not produce bleed, and if it is left in water for 6 months, it loses only about 1%. After production, the sealant surface is coated with an alkali-soluble film such as cellulose acetate phthalate so as to withstand rainfall before being transported to the fume tube factory and during the piling time at the fume tube factory. Ideally, temporary water resistance should be imparted.

(4) Coating device As a device for applying the above-mentioned sealant, for example, a hand-held caulking gun or an aerosol can can be used. Not suitable for construction. In particular, the aerosol mixes with the extruded sealant in which bubbles of the propellant gas are extruded and does not provide a uniform coating state.

One method which is considered to be practically preferable is to use an appropriate cylindrical container, for example, a pail containing a fluid sealant, as it is. For this reason, a hole is made in a plunger (piston) having a size equal to the inner diameter of the pail and the like, and a flexible tube with a nozzle for delivering sealant is connected to the hole, while a thrust is applied to the plunger via a hydraulic rod or the like. That is. However, since the thickness of a pail is usually about 0.5 mm,
When the consistency of the sealant is high and high pressure is required for extrusion, it is necessary to reinforce the can body. The sealant in the pail can be desirably vacuum-defoamed in a pail or in another container before coating to reduce the amount of dissolved air. Since the sealant is completely adhered to the collar and protected from both sides by the ribs, there is no danger of peeling off during the connection operation.

On the other hand, in order to make the coating state as uniform as possible, it is desirable that the operator can always perform the coating operation in a fixed posture (more preferably, with the nozzle direction fixed). Therefore, by making the collar upright on a pair of drive rollers and transmitting the rotation of the roller to the collar, it becomes possible to apply the coating almost without changing the direction of the nozzle,
Workability is significantly improved. The transport of the color to the drive roller and the transport from the roller can be performed efficiently by using, for example, an overhead traveling hacker,
In a small scale, inclined surfaces may be provided on both sides of the roller, and the roller may be unloaded and unloaded.

The entire production operation including the above-mentioned coating operation can be automated or promoted as required. This includes sheet metal work and coating work, such as unwinding a coiled steel sheet, cutting it to a certain length, forming it to a predetermined radius, welding the cut end, filing the welded part, welding the ribs, etc. It is. However, since the collar itself is not a mass-produced product like a drum, it is preferable to focus on labor saving rather than complete automation. Compared with other manufacturing processes, the sealant coating operation is easier to design by automatically moving the uncoated color to the coating nozzle position and separating the coated color from the nozzle position. It is. For this reason, a means for moving the set of driving rollers to the rollers along the axial direction, a sensor for optically detecting the end of coating (the sealant is white, so it can be easily connected to the uncoated portion. It is possible to automatically apply the coating by using a fixed nozzle by mainly combining means for moving the driving roller according to a signal from the sensor and moving the roller to the unloading and unloading position. .

[0013]

The collar according to the present invention has a plurality of ribs inside. These ribs prevent the collar from being sluggish or fallen off with respect to the fume tube main body even if the fume tube main body is slightly contracted, and also prevent damage to the generic name of the sealant during connection work with the fume tube main body. Then, the raw material of the fume tube swells due to the moisture in the ready-mixed concrete, thereby completely sealing the space between the inner wall and the collar.

Further, the sealant coating apparatus enables continuous sealant coating work to be performed in a substantially constant posture with respect to a collar which is continuously rotated, so that workability is remarkably improved. In particular, when a pail can is used as a sealant container, continuous work can be performed simply by replacing the used pail with a new pail containing a fluid sealant.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the invention will be described below by way of examples, but the illustrations are merely for explanation and do not mean the limitation or limitation of the invention.

Embodiment 1 (Color) (A) Structure FIG. 1 is a cutaway side view of a collar according to the present invention. Collar 1 is a steel plate with a width of 25 to 30 cm and a thickness of 4.5 to 9 mm.
It is made by molding into a 300 cm 2 annular shape, and two ribs 2 and 2 ′ surround the inner peripheral surface at one end (the left end in the figure), and a sealant 3 is attached in an annular shape between the two ribs.

(B) Usage The usage of the color is shown by the phantom line in FIG. 1 and the enlarged view in FIG. That is, the collar 1 is integrally attached to the small diameter portion 4a at the rear end of the target propulsion pipe (fume pipe) 4. The propulsion pipe 4 'on the rear side is a tapered part 4' on the front end.
It is connected to the rear end of the front-stage propulsion pipe 4 via an annular rubber sealing material 5 fitted in a. After the connection, grouting agent, grout mortar and the like are injected through an injection hole (not shown) formed in the pipe wall, and joints 7 are formed in the grooves 6 between the opposed ends of the pipes 4 and 4 ′. Finish.

(C) Operation As described above, since the sealant 3 is protected by the ribs 2 and 2 ′, the sealant 3 is not damaged or peeled off by rubbing or impact when attaching the collar 1 to the propulsion pipe 4. .
In addition, since the ribs 2, 2 'of the collar bite into the outer wall of the rear portion (connection portion) 4a of the tube 4, there is no delusion with respect to the main body.

Embodiment 2 (Sealant Coating Apparatus No. 1) (A) Structure FIG. 3 is a schematic view of the entire coating apparatus of the present invention. The device 10
It comprises a sealant squeezing device 11 and a rolling device 21. The squeezing device 11 includes a portal frame 13 mounted on a pedestal 12, a self-returning hydraulic cylinder 14 vertically mounted on an upper frame 13a of the frame, and a pressing rod of the cylinder.
14a, a piston 15 having two holes 15a and 15b fixed horizontally at the end of the piston, a flexible conduit 16 connected to one hole 15a of the piston, and a switch 18 connected to the distal end of the conduit. And a nozzle 17.

The peripheral portion of the piston 15 has an O-ring 15c.
And another hole 15b drilled in the piston is in close contact with the inner wall of the pail C containing the sealant S
Can be hermetically closed by a stopper 19.

The color rolling device 21 includes a pair of rolls 23 and 23 'spaced on a pedestal 22, a reduction motor 24 for driving the rolls, the motor and the rolls 23', and the rolls and the rolls. It comprises chains 25 and 26 connecting 23. In addition,
The roll 23 is accompanied by an inclined road plate 27, which facilitates the unloading or unloading of the collar onto the rollers by hand (overhead hackers are not assumed in this example).

(B) Operation At first, if necessary, a pail containing a sealant remains
Alternatively, transfer the sealant to another container, apply vibration, agitation, or the like, and perform vacuum degassing to remove air bubbles in the sealant. Stop rotation of the hydraulic pump (not shown)
Is lifted to the uppermost position, and then the pail containing the sealant is placed directly below the piston 15 and the stopper 19 is removed. The switch 18 is turned on to lower the piston 15 gradually so that the lower surface of the piston 15 is in close contact with the upper surface of the fluid liquid sealant S. The color 1 to be coated is placed on the stopped rollers 23, 23 'by using the road plate 27. Then, once the switch 18 is turned off, the stopper 19 is closed, and the switch is turned on again, and while the motor 24 is turned on, the rollers 23 and 23 'are rotated to rotate the coating color 1 thereon. The sealant S is extruded through the nozzle 17 and the sealant S is applied on the collar 1. When the coating is completed, the switch 18 is turned off, the power supply to the motor 24 is turned off, the coated color is wholesaled, and the following operation is repeated again.

Embodiment 3 (Example of Automation of Sealant Coating Apparatus) FIG. 4 is a conceptual diagram of an example of the case where the coating apparatus of the present invention is automated. The figure is drawn as a view of the main part of the apparatus 31 viewed from directly above, and the pedestal 22 in FIG. 3 is further mounted on a trolley 33 driven by a linear motor 32, and the rails 34, 34 'are drawn on paper. It can move in parallel.

The television camera 35 monitors the coating position on the inner surface of the collar 1, and a signal from the monitor activates a control valve (not shown) in the hydraulic circuit via a control device to change the pushing pressure. This operates to make the extrusion width constant. Alternatively, the control signal from the sensor may be configured to change the rotation speed of the rolling roller via a continuously variable transmission.

[Effects of the Invention] As described above, the present invention has a good connection with the fume tube for a propulsion pipe, and does not deviate or come off when handling the propulsion pipe, and has a good sealing property. Providing a structure and a coating device for coating the sealant with the color can contribute to the development of the propulsion pipe method.

[Brief description of the drawings]

FIG. 1 is a cutaway side view of a collar according to the present invention.

FIG. 2 is a partially enlarged sectional view for explaining a use state and an operation effect of the collar in FIG. 1;

FIG. 3 is a schematic view of the entire coating apparatus of the present invention.

FIG. 4 is a conceptual plan view for explaining the automation of the coating device of the present invention.

FIG. 5 is a partial cross-sectional view of a known propulsion tube with a collar.

[Explanation of symbols]

 1: Overall color of the present invention 1 ': Overall known color-2,2': 1 rib-3: 1 linear sealant 4: Front propulsion pipe-4a: 4 rear end small diameter section 4 ': Rear Side propulsion pipe ・ 4'a: 4 'front end side taper part 5: Annular rubber sealing material 6: Groove of connection part of each propulsion pipe ・ 7: Joint in 6 8: Water absorbent rubber 10: Sealant coating of the present invention Entire device ・ 11:10 sealant squeezing device ・ 12:10 pedestal ・ 13:10 frame ・ ・ 13a: 12 upper frame ・ 14:10 hydraulic cylinder ・ ・ 14a: 14 pressing rod ・ 15:10・ 15a: 15 conduit (16) connection hole ・ ・ 15b: 15 air vent hole ・ ・ 15c: 15 O-ring ・ 16:10 flexible conduit ・ 17:10 nozzle ・ 18:10 Switch for closing 19: 15b ・ 21: Collar rolling device ・ 22:21 pedestal ・ 23,23 ': 21 roller ・ 24:21 roller driving motor ・ 25, 26: Transmission chain・ ・ 27:21 road plate 31 ： Overall automatic coating equipment ・ 32:31 linear motor ・ 33:31 trolley ・ 34,34 ': 31 rails ・ 35:31 TV camera C: Pail can E: Earth and sand G: Clearance at the connection between the known collar 1 'and the propulsion pipe 4 S: Fluid sealant

Continuation of the front page (72) Inventor Michinobu Uchida 2-6-1 Katsuma, Hofu-shi, Yamaguchi Prefecture Inside Oji Rubber Chemical Co., Ltd. (56) References Japanese Utility Model Sho-59-146683 (JP, U) Japanese Utility Model Sho-59- 146682 (JP, U) Shokai Sho 57-205479 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E21D 9/06 311 E21D 9/06 301

Claims (2)

(57) [Scope of request for utility model registration] A plurality of annular ribs unevenly distributed on the inner surface of a narrow metal cylinder, a hydrophilic polyurethane based on an unvulcanized rubber located in the middle of the ribs, and a hydrophilic polyurethane having a reactivity with the polyurethane. A propulsion pipe collar comprising a sealant containing a water-absorbent resin. 2. A sealant applying apparatus for applying a sealant to a collar for a propulsion pipe according to claim 1, wherein the piston penetrates a part of the piston substantially equal to the inner diameter of a cylindrical container containing a fluid sealant. A sealant applicator comprising: a nozzleed conduit connected to a hole; means for applying a pressing force of the piston; and a pair of co-rotating horizontal drive rollers.