KR920010765B1 - Spray equipment for mortar - Google Patents

Abstract

A Y type suction pipe (27) connected to the lower of a mortar hopper (6), piston heads (43a),(43b) and piston rods (42a)(42b) reciprocating in cylinders (23a)(23b), a cranks (21a)(21b) connected to a crank shaft (21) at which a coupled gear (22) linked to a driving gear (20) of the shaft (19') of a reduction pulley (19) is provided constitute a spray device (7). The cylinders (23a)(23b) are alternatively operated so that the cement mortar supplied and storaged at the hopper can be sprayed through a pipe (30).

Description

Spray device for wall plastering cement mortar for spray method

1 is an overall front view of the installation and use state of the apparatus of the present invention.

2 is a cross-sectional view taken along line A-A 'of FIG. 1 showing the operation of the weight ball valve according to the suction and discharge operation of the cement mortar of the spray apparatus.

3 is a sectional view taken along the line B-B 'of FIG. 2, showing a forward and backward operating state of the piston device.

4 is a cross-sectional view taken along the line C-C 'of FIG.

Figure 5 is an enlarged cross-sectional view of the piston head extract of the present invention.

Figure 6 is a schematic cross-sectional view of the mortar mixing conveying apparatus for mixing and conveying the cement mortar with the present invention apparatus.

* Explanation of symbols for the main parts of the drawings

1: Sand Screening Network 2: Cement Supply Hopper

3: Mixing and feeding screw 4: Mortar transfer container

5: mortar mixed transfer device 6: mortar hop

7: spray device 9: vibration motor

10: conveyor belt 14: motor

16: injection pipe 17: drive motor

20: drive gear 21: crankshaft

22: interlocking gear 23a, 23b: suction and discharge pipe

26a, 26b and 28a, 28b: support bolt 27: “Y” type suction pipe

29a, 29b: discharge pipe 30: discharge pipe

34: injection hole 35a, 35b, 36a, 36b: valve tube

37a, 37b: Suction capacity ball valve 38a, 38b: Discharge capacity weight ball valve

39a, 39b: auxiliary cylinder 40a, 40b: through hole

42a, 42b: piston device 43a, 43b: piston

43: (Web)

The present invention is to plaster the wall surface of the concrete building with cement mortar, the method of bonding the plaster cement mortar to the wall by spraying method using a spray device to perform the plastering of the wall more simply and quickly Plastering plaster for spraying method using cement mortar for plastering, which is designed to shorten the construction air, and to increase the strength of the wall by preventing the effect of promoting adhesion to the existing concrete wall and preventing the occurrence of cracks. It relates to a spray device of mortar.

In more detail, in the preparation of plaster cement mortar, the mixing ratio of cement and sand is 1: 3 and the slump of cement mortar is mixed in water to be about 6 cm, as in general cement mortar. Strength enhancer (EVA), moisturizer (Methyl celluslose), plasticizer (Napthalene Deoxyde Conden-sate), retardant (Urea Formaldehyde, Resin), and thickener (Calcuim Cabonate) are mixed in an appropriate amount, and then it is 1: 3 ratio. As a method of kneading on mixed cement and sand, it gives high fluidity to cement mortar itself, enables spraying, enhances affinity with cement groups such as concrete walls and bricks, and promotes adhesion, and adheres to mortar itself. To reduce the loss of materials by preventing the phenomenon of bounding during spraying and hardening according to the climatic conditions of the work site. Not only can be adjusted, but also has a high moisturizing power after hardening to prevent cracking and increase strength. The purpose of the present invention is to provide a device. In the spray device, a transfer pump device for suctioning and discharging the cement mortar is constituted by machine cutting using a crank shaft, so that the suction and discharge operation of the cement mortar can be pursued quickly. Even if the stroke is shortened, it is possible to continuously discharge the cement mortar with the desired discharge amount, thereby miniaturizing the transfer pump device itself. Accordingly, a mixing and conveying device and a spray device for mixing and conveying the cement mortar are built inside the building. Plastering cement mortar by spray method It can reduce the construction air as well as the worker who supplies sand and cement to the mixing and conveying device and the worker who sprays the cement mortar discharged from the spray device on the wall. It can be in charge of the device of the present invention can be carried out by many times more than the conventional plastering work even with the mobilization of a small number of workers, while inventing to significantly reduce the air and simultaneous labor costs.

In general, when plastering the inner and outer walls of a masonry building using concrete buildings or bricks with cement mortar, a plasterer directly moves to a plastering position by stacking a small amount of cement mortar on a mortar supporting plate and rubs it with a trowel. Plastering work has been performed by the plasterer, and since the amount of cement mortar transported by the plasterer is limited to a very small amount, after the exhausted cement mortar is exhausted, the plasterer returns to the cement mortar storage site and moves back to the work site. Because of the time used to make a lot of time, there was a bad closure that the actual plastering time is shortened, resulting in a problem that the efficiency of plastering work is lowered compared to the number of workers put into the building plastering work, the working air is longer and the building Outside high-rise In the case of plastering work, the worker takes more time to transport the cement mortar, which brings about the drawback of remarkably longer plastering work, resulting in the increase of labor cost and the increase of labor cost. Cement mortar used for plastering work with the same artificial work means is mixed with cement and sand in the ratio of 1: 3, and the mixing degree of water is usually 4 ~ 5 cm (hard) as a slump unit. Although there is an easy advantage in stacking and moving, because the cement mortar is not adhered well at the time of plastering, a large amount of cement mortar falls to the floor and has the disadvantage of being discarded.

The present invention has been made to eliminate all the drawbacks of the prior art, in particular, the present invention in the manufacture of cement mortar to be suitable for the compact spray apparatus developed to adhere the cement mortar to the wall by spraying method, It has good fluidity so that it can be sprayed as a spray device, and it has good adhesion to the wall and has high moisturizing ability to prevent cracking and increase the strength. The curing time can be adjusted freely according to the prevention and climatic conditions such as the temperature and humidity of the work site. Especially, the spraying cement mortar can adjust the curing time of cement mortar appropriately considering the time according to the progress of the plastering work. Plastering can induce continuous work step by step In order to proceed the operation more effectively, the present invention will be described in detail below.

In general, in the preparation of cement mortar by mixing cement and sand in a ratio of 1: 3, water is mixed with cement and sand in a ratio of 1: 3 such that a slump of cement mortar is about 6 cm, Cement mortar slump of about 6 cm is mixed with 18 liters of water by mixing the compounding material consisting of 1,875g of adhesion and strength enhancer, 18g of moisturizer, 37,5g of plasticizer, 12.5g of retardant and 318g of middle agent. It is possible to obtain the cement mortar required by the present invention by the production method.

The cement mortar obtained by the above-described manufacturing method is characterized by maintaining a state in which the plastering work is possible within a time of about 3 hours from the sprayed state, and in order to maintain a state in which the plastering work is easy for a longer time, (18 liters) can be increased or adjusted by appropriately mixing and mixing each compounding material.

Referring to the apparatus of the present invention for spraying the cement mortar prepared as described above are as follows.

A mortar mixed conveying apparatus (5) provided with a sand sorting net (1) for sorting sand, a cement supplying hop (2) for supplying cement, and a mortar conveying tube (4) provided with a mixing and feeding screw (3); The spray apparatus 7 of the present invention is installed such that the mortar hopper 6 is positioned below the mortar conveying tube 4 end side of the mortar mixing conveying apparatus 5, and the mortar mixing conveying apparatus 5 and the spray apparatus ( 7) are separated from each other, and each wheel is installed to facilitate the movement.

The sand sorting net 1 of the mortar mixing and transporting device 5 is installed inclined on the inclined base 8, and is configured to vibrate by the vibration motor 9 at the upper end to perform the sorting operation of the sand by itself. Under the sand wire mesh 1, the conveyor belt 10 is installed to be configured so that the selected sand is automatically supplied to the mixing end side of the mortar conveying tank 4.

In addition, the cement supply hopper (2) is installed on the upper end of the mixing stage of the mortar transfer barrel (4) to flow out the supplied cement to the drop plate (2 ″) through the outlet (2 '), the outlet (2') is discharged By adjusting the operation of the control plate 11, the outflow of cement is mixed with the amount of sand transferred to the conveyor valve 10 at a ratio of 1: 3, and the rotating cylinder 12 is rotatable inside the cement supply hopper 2. The rotating cylinder 12, the conveyor belt 10, and the mixing and feeding screw 3 were configured to rotate at predetermined rotational ratios by the power of the motor 14 mounted on the base 13, Here, the connection configuration of the power unit for transmitting the power of the motor 14 is omitted.

The mixed mixed feed screw 3 which is rolled up inside the mortar conveying tube 4 is composed of a wing shape so as to facilitate the proper mixing and simultaneous feeding of the separately supplied cement and sand, and on the shaft 3 '. A plurality of stone pieces 15 are spirally welded, and the rear side of the cement supply hopper 2 is sprayed with 18 liters of water mixed with a mixture of several kinds of compounding materials described in the above-mentioned manufacturing method. Cement and sand, which are transported while being mixed at the feed end side of the mortar conveying tube 4 by installing an injection pipe 16, are mortarized by water injected from the injection pipe 16, and thus, cement, sand, and water The mixed cement mortar moves in the mortar conveying tank 4 while its mixed state is completed, and is stored in the mortar hopper 6 of the spray apparatus 7.

Referring to the configuration of the spray device 7 for spraying the cement mortar supplied from the mortar mixing container 4 of the mortar mixing and conveying device 5 as described above, it is condensed to the output shaft of the upper drive motor 17 The belt 18 ', which is addressed to the small pulley 17', is delivered to the large deceleration pulley 19 that is fixed to one end of the interlocking shaft 19 'which is rolled into the spray device drive unit 18, and the linkage side ( 19 ') is driven by the drive gear 20 and engaged with the interlocking gear 22, which is pinched between the single-axis crank 21a and the other-axis crank 21b of the crankshaft 21 to drive the drive motor 17. The crankshaft 21 is configured to rotate in a decelerated state, and the cylinder mounting body 24 in which two cylinders 23a and 23b are laid horizontally between the spray device driving unit 18 and the mortar hopper 6. ) And a pair of suction and discharge tubes 25a, 25b communicating with the front ends of the two cylinders 23a, 23b are installed vertically. There are two support bolts 26a and 26b in the middle portions of the suction and discharge pipe bodies 25a and 25b, that is, the positions coinciding horizontally with the front ends of the cylinders 23a and 23b. Side by side horizontally horizontally, the upper portion of the discharge portion 25 ', (26') for discharging the cement mortar with the support bolt as the starting point, the lower portion of the suction portion (25 ') that only serves to suck the cement mortar ) And (26 ″), the lower suction section 25 ″ and 26 ″ have a “Y” type suction pipe composed of one suction port 27 'communicating with the mortar hop 6 below. The suction guide passages 27a and 27b of (27) were connected and attached.

In addition, a pair of discharge pipe bodies 29a provided with support bolts 28a and 28b penetrating through the discharge portions 25 'and 26' above the suction and discharge pipe bodies 25a and 25b, respectively. , 29b are vertically connected to each other, and the discharge pipe body 30a is integrally formed with two connection pipes 30a and 30b connected to the top of the discharge pipe bodies 29a and 29b and has one discharge path 30. In order to connect the long discharge guide tube 31 and the discharge hose 32 in order to, the length of the discharge hose 32 is to have a length that can be discharged by the discharge pressure of the cement mortar, and at the end of the An injection hole 34 having an injection nozzle 34 'connected to the compressed air hose 33 connected to the nozzle is installed.

Discharge pipes 29a and 26 which are connected to the discharge and discharge portions 25 ', 26' of the upper and lower portions of the suction and discharge pipe bodies 25a and 25b, and the suction portions 25 ″ and 26 ″ of electricity. 29b) and valve pipes 35a, 35b, 36a, and 36b having small inner diameters are respectively installed between the suction guide passages 27a and 27b of the “Y” type suction pipe body 27, Spherical suction weight ball valve between the two support bolts 26a, 26b which are placed on the middle of the suction and discharge pipe bodies 25a, 25b and the lower valve pipes 36a, 36b. (27a) and (37b), the diameters of the suction ball valves (37a) and (37b) are larger than the inner diameters of the valve tubes (36a) and (36b), and the suction sections (25 ″) and (25 " ) And smaller than the inner diameter of 26 ", and also for the suction between the support bolts 28a, 28b of the discharge tubes 29a, 29b and the valve tubes 35a, 35b. Discharge weight valves 38a and 38b having the same configuration as the weight valves 37a and 37b were charged and installed.

In addition, the intermediate portions of the suction and discharge pipe bodies 25a and 25b attached to the front side of the cylinder mounting container 24 are configured to be in communication with the front ends of the cylinders 23a and 23b, and the cylinder 23a. The rear end of (2 3b) is connected to the secondary cylinders 39a and 39b having a large outer diameter, and the auxiliary cylinders 39a and 39b are drilled through the through holes 40a and 40b, respectively. Lubricant 41 injected and stored in the enclosure 24 is freely introduced and discharged into the auxiliary cylinders 39a, 23b, 39b, and 23b through the through holes 40a and 40b. The lubricating oil 41 flows in and out of the piston heads 43a and 43b of the piston devices 42a and 42b which are alternately reciprocated by the rotational drive of the crank shaft 21. Lubricating the inner walls of the cylinders 23a and 23b while acting as the opposite to the suction and discharge of the gas Tone head (43a), and proceeds to hameuroseo smooth suction and discharge operation of the cement mortar so that the round operation is performing well in (43b).

The piston devices 42a, 42b are connected to the crank rods 44a, 33b connected to the cranks 21a, 21b of the crankshaft 21, and the piston heads 43a, 43b. ) Is made of a urethane rubber material having excellent abrasion resistance and strength, and the web 43 of the tip portion thereof is formed like a circular blade by an inclined main surface inclined inward, and the diameter of the piston heads 43a and 43b itself ( d), (D) so that the outward self-elastic action of the web 43 always acts on the inner wall of the cylinder (23a), (23b) so that the suction of the cement mortar of the piston head (43a), (43b) and Perfection can be expected in the discharge operation.

Referring to the present invention made in the above manufacturing method and its members in detail as follows.

First, the method of manufacturing the cement mortar required by the spray apparatus of the present invention is outlined. In the mortarization of cement and sand, which are usually mixed at a ratio of 1: 3, 18 liters of water kneading cement and mole is used. 1,875 g strength enhancer (EVA), which acts to improve adhesion and strength, and 18 g of moisturizer (Methyl celluose) that prevents the occurrence of cracks by inhibiting rapid hardening of cement mortar by acting to preserve humidity. 37.5 g of plasticizer (Napthalene Deoxyde conden Sate), which shows the condensation and condensation of cement mortar, 12.5 g of Urea Formaldehyed Resin, which facilitates plastering by delaying the fastening of cement mortar 318 g of working caulicum cabonate are mixed with water and then kneaded by spraying it with cement and sand supplied in a 1: 3 ratio. When the amount of water mixed with the mixture is adjusted appropriately to the amount of cement and sand in a ratio of 1: 3 so that the slump of the cement mortar is about 6 cm, plaster cement mortar suitable for the spraying method of the present invention is prepared. In the spraying apparatus of the present invention with the cement mortar kneaded and mixed to about 6 cm, the slump is the most preferable state. The cement mortar has a high fluidity and viscosity, and the spray action is well progressed. It has good affinity with concrete walls or bricks, so it has good adhesion, and there is little splashing from the spray walls, which can reduce the loss of materials. Good spreading condition when plastering with trowel after spraying It can be expected to facilitate the plastering work.

In addition, after the plastering operation, the moisturizer evenly mixed with the cement mortar has the effect of containing humidity for a long time even after the hardening of the cement mortar, thereby preventing the occurrence of cracks during hardening, thereby increasing the strength of the wall. After the cement mortar is sprayed on the wall, the retarder is a delay time according to the progress of the plastering process. For example, the retarder maintains the cement mortar in an easy state for plastering until about 3 hours after spraying. This can be done smoothly.

On the other hand, the above embodiment is the most preferred embodiment in order to expect the smoothness of the spray action and plastering process of the cement mortar by the spray method, and in some cases 18 liters when the progress of the plastering operation takes about 3 hours or more It is possible to obtain cement mortar that meets the requirements of working conditions by increasing or decreasing the amount of water on the basis of.

Referring to the process of mixing and spraying the cement mortar prepared by the manufacturing method as described above are as follows.

FIG. 1 shows the vibration motor when the vibration motor 9 at the upper end of the sand sorting net 1 of the mortar mixing and transporting device 5 is operated, and then the worker supplies sand to the sand sorting net 1. Only sand of the particle size required by the vibrating operation of (9) falls on the conveyor valve (10), and the conveyor belt rotates to supply sand to the feed shortening of the mortar conveying tank (4), and the cement supply hopper (2). The cement put into and stored in the container is guided to the outlet port 2 'by the rotational operation of the rotating cylinder 12 and falls to the supply end side of the mortar conveying tube 4 as a drop plate 2 ″, which falls to the supply end side at this time. The amount of cement and sand supplied should be 1: 3.

Cement and sand supplied at a feed ratio of the mortar transfer barrel 4 in a ratio of 1: 3 are mixed and transferred by the mixing and feeding screw 3, and an injection pipe 16 installed at the rear side of the cement hopper 2 is provided. It is kneaded by the water sprayed from) to become cement mortar, wherein the water kneading the cement and sand is water obtained by the above-described manufacturing method, and the spraying amount supplied is such that the slump of the cement mortar is about 6 cm. The injection supply amount is adjusted.

Cement mortar mixed and coarse so that the slump is about 6 cm as described above is transported through the mortar transfer barrel 4 by the mixing and feeding screw 3 and continuously to the mortar hopper 6 of the spray device 7. In this case, when the driving motor 17 on the spray device 7 side is operated, the large deceleration pulley 19 is decelerated by the belt 18 'held in the small pulley 17'. Crank 21a formed on both sides of the crankshaft 21 by rotating the drive gear 20 condensed on the interlocking shaft 19 'to rotate the interlocking gear 22 condensed at the center of the crankshaft 21. ) And 21b alternately reciprocate the piston devices 42a and 42b connected to the crank rods 44a and 44b. The piston head of the cylinder 23a as shown in FIG. In the state where 43a starts the retraction operation, the piston head 43a sucks the cement mortar. Like the piston head of 23b), the state of starting the forward operation becomes a state of discharging the cement mortar.

Therefore, the suction of the cement mortar existing in the suction and discharge pipe bodies 25a in communication with the front end of the cylinder 23a by the suction action according to the retraction operation of the pitton head 43a is sucked. And suction suction weight ball valves 37a and 37b inherent in the lower suction portion 25 ″ and the upper discharge pipe body 29a of the discharge pipe body 25a, as shown in FIG. The discharge weight valve 38a is seated on the upper portion of the valve tube 35a to perform a sealing action. As a result, the suction force of the piston head 43a acts only on the suction part 25 ″, and thus the suction weight ball valve 37a. By the suction force is moved upwardly above the valve pipe (36a) is caught in two jersey bolt (26a) to open the valve pipe (36a) in a state that can no longer move upwards is stored in the mortar hopper (6) Cement mortar as the suction port (27 ') of the "Y" type suction pipe (27) It is sucked into the valve tube 36a opened through the suction guide passage 27a and is sucked into the cylinder 23a. On the contrary, it is discharged by the piston head 43b which discharged into the cylinder 23b on the other side. The discharge pressure of the cement mortar, which is used, causes the valve tube 37b to be sealed by applying a pressing pressure to the suction weight ball valve 37b embedded in the lower suction portion 26 ″ of the suction and discharge pipe body 25b, thereby eventually cementing the cement. The discharge pressure of the mortar is moved by the discharge weight ball valve 37b seated on the upper periphery of the upper valve tube 35b to open the valve tube 35b, and is discharged by the ejection operation of the piston head 43b. The cement mortar discharges and moves to the discharge pipe body 30 via the connecting pipe 30b through the valve pipe 35b and the discharge pipe body 29b as the discharge part 26 '.

The suction and discharge action of the cement mortar as described above is the piston head (43a), (pib) of the piston device (42a), (42b) connected to the crank (21a), (21b) to move in accordance with the rotation of the crank shaft (21) The cement mortar stored in the mortar hopper 6 by the mutually opposite reciprocating operation of 43b) alternately along the suction guide passages 27a and 27b of the “Y” type suction pipe 27 and the cylinder 23a, The cement mortar discharged through the discharge pipe bodies 29a and 29b alternately forms two connecting pipes 30a and 30b as the suction and suction of the 23b are continuously performed. The cement mortar discharged to the discharge guide tube 31 and the discharge hose 32 by being discharged through the discharge pipe 30 having one discharge port is continuously and discharged in the same amount, and the compressed air hose 33 Compressed air pressure pressurized into the injection hole 34 through the At the same time, the sprayed cement mortar is sprayed and adhered to the wall to some extent so that the operator can easily grasp the spray adhesive thickness of the cement mortar with the naked eye. As the work progresses, it helps to make the next plastering work easy.

On the other hand, whenever the piston heads 43a and 43b, which operate to suck and discharge cement mortar, start the forward and backward operations, the rear end of the cylinder 23a, 23b is located inside the cylinder holder 24. The filling and lubricating oil 41 smoothly moves forward and backward of the piston heads 43a and 43b, which are alternately introduced and discharged through the through holes 40a and 40b of the auxiliary cylinders 39a and 29b. The lubricating oil flowing into the rear end of the cylinders 23a and 23b and then discharged to the inner wall of the rear end of the cylinders 23a and 23b whenever the piston heads 43a and 43b reciprocates. By supplying lubricating oil, lubrication of the piston heads 43a and 43b, as well as reducing wear, significantly extends the service life of the cylinders 23a, 23b and the piston heads 43a, 43b. Effect.

Further, the web 43 at the tip of the piston heads 43a and 43b has a circular blade shape, and the diameter D at the time of manufacture of the web is the piston head 43a and 43b diameter d. The larger reason is that, when inserted into the cylinders 23a and 23b, the web 43 reciprocates while always keeping its inner diameter in close contact so that the suction force and the earth output according to suction or discharge action can be displayed without loss. The inclined inner circumferential surface of the web 43 allows the reaction force corresponding to the discharge pressure of the cement mortar to act on the centers of the piston heads 43a and 43b. In addition to the prevention of wear, the wear of the inner walls of the cylinders 23a and 23b can be significantly reduced.

The present invention as described above can easily and quickly perform the plastering work on the inner and outer walls of the building by spraying the cement mortar by the spraying method using the spray device, so that the slump of the cement mortar becomes about 6 cm. Various blending materials are mixed with the water to be mixed. Mixing materials for mixing with water include strength enhancers, moisturizers, plasticizers, retardants, and midpoints in an appropriate amount of water, followed by kneading cement and sand. Spraying and adhering cement mortar at appropriate intervals on the wall by spraying method using high quality cement mortar which does not flow down without sticking well and sticking to the wall by giving good fluidity and adhesive force, etc. Spray equipment that makes it easier and faster to perform plastering operations In addition, the spray device for spraying the cement mortar can be miniaturized by constructing the piston device as a mechanical structure by a crankshaft without using a hydraulic system as in a conventional concrete transfer pump car, and spraying the inside of a building under construction. The device and the mortar mixing transfer device can be moved and installed, so the plastering work on the inner wall of the building can be done by spraying method. Also, the cement mortar discharge pressure of the spray device is strong, and the cement mortar can be easily sprayed and bonded to the high wall. It shows a great effect to make the work quickly, and since the inlet and discharge valves of cement mortar are composed of spherical weight ball valves, the wear phenomenon of the opening and closing operation and the contact action with cement mortar are different from the conventional plate. Extremely less than a gate valve The long service life is long, and lubricating oil flows into and out of the cylinder to lubricate the inner wall of the cylinder to extend the service life of the piston and piston head as well as smooth the reciprocating operation of the piston head. Therefore, the discharge amount of cement mortar can be kept constant.

Claims (5)

Suction between the “Y” type suction pipe 27 and the upper pair of discharge pipes 29a and 29b communicating with the mortar hopper 6 which receives the cement mortar discharged into the mortar feed container of the mortar mixing feeder. And the pistons of the piston heads 43a and 43b which are provided with discharge pipes 25a and 25b and reciprocally operate inside the cylinders 23a and 23b of the cylinder mounting enclosure 24 in communication with the center thereof. The devices 42a and 42b have an interlocking gear 22 meshed with a drive gear 20 affixed to an interlocking shaft 19 'of a large speed reduction pulley 19 that receives power directly from the drive motor 17. Cement mortar which is continuously supplied to and stored in the mortar hopper 6 by forming a spray device 7 as a constituent means connected to both cranks 21 a and 21 b of the crank shaft 21 which is condensed is cylinder 23 a. And 23b alternately repeat suction and discharge operations so that the cement mortar as a spraying port connected to the discharge pipe 30 having a single discharge port is formed on the wall surface. Spray device for wall plastering cement mortar for the spray method, characterized in that it is configured to be sprayed, bonded to the plastering. A jersey bolt (26a), (26b), (28a) on the upper side of both suction guide passage (27a), (27b) of the "Y" type suction pipe (27) connected below the mortar hopper (6). And (b) stack the suction chip discharging pipe bodies 25a and 25b and the discharge pipe bodies 29a and 29b which are installed so as to penetrate horizontally, and the discharge pipe body 30 is connected to the upper end of the discharge pipe body 30. After connecting 30a and 30b, the piston heads 43a and 43b of the piston device of the cylinders 23a and 23b which are rolled so as to communicate in an orthogonal state on each intermediate portion of the suction and discharge pipes are When suctioning the cement mortar stored in the mortar hopper while alternately reciprocating, the suction ball valves 37a and 37b alternately open and close the valves 36a and 36b, and cylinder suction When discharging the old cement mortar, the discharge weight ball valves 38a and 38b are alternately opened and closed to alternately perform the suction and discharge operation of the cement mortar. Spraying method the wall plastering of the cement mortar spraying device according to claim to that configuration. 3. The suction ball discharge ball valves 37a, 37b, 38a, 38b are configured in a spherical shape, and the diameters of the valve pipes 36a, 36b, and 35a are respectively set. ) And 35b are larger than the inner diameter of the suction 25 ", 26" and the discharge pipes 29a, 29b, and extremely smaller than the inner diameter of the heavy duty ball valves. And (28a) and (28b) spray apparatus for wall plastering mortar for spraying method, characterized in that configured to prevent excessive movement in the valve pipe during the suction and discharge operation of the cement mortar. The rear end of the cylinder (23a), (23b) is connected to the auxiliary cylinders (39a), (39b) having through holes (40a), (40b) to the front of the piston head (43a), (43b). The lubricating oil 41 filled in the cylinder mounting box 24 in the reverse operation is introduced into and discharged from the auxiliary cylinder and the cylinder through the through holes 40a and 40b, thereby supplying lubricating oil to the inner wall of the cylinder every time the piston head is operated. Spray device for wall plastering cement mortar for the spray method, characterized in that configured to smooth operation. The piston head 43a, 43b of the piston device is made of urethane rubber material, and the tip diameter D having the inclined inner circumferential surface of the web 43 is the diameter d of the piston head. When it is installed inside the cylinder to make the web 43 perform airtight action, the inclined inner circumferential surface is configured to increase the discharge pressure as the cement mortar is concentrated toward the piston head during discharge. Spray apparatus for wall plastering cement mortar for the spray method, characterized in that.

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