JPH0547201U - Spray gun for plasterer material - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] Preventing the occurrence of troubles caused by plaster material entering the plaster material valve. [Structure] The plaster material supply passages 1, 5, 6 and the plaster material valve 3 are provided. The plaster material valve 3, the valve case 10, and the elastic tube 11 interposed in the plaster material supply passage.
And a pressing means for crushing the elastic tube 11 from the outside. And the pressing means 12, 12d, 13
Is supported by the valve case 10 so as to be position-changeable between the closing operation position where the elastic tube 11 is crushed and the opening operation position where the elastic tube 11 is separated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a spray gun for spraying plaster material, which is attached to the tip of a hose to which plaster material such as mortar, spray tile, ricin or stucco is pumped.

[0002]

[Prior Art]

 Conventionally, as a spray gun for plastering material of this kind, a plastering material valve for stopping the supply of plastering material through the plastering material supply passage on the spray gun side and an air valve are provided on the side of the spray gun. Are known (for example, see Japanese Utility Model Laid-Open No. 57-199656). The plaster material valve in this spray gun is composed of a cylindrical valve with a communication hole formed in the diameter direction, and the cylindrical valve is rotatably fitted in the plaster material supply passage.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned plaster material valve, since the rotary sliding surface opens in the plaster material supply passage and is in contact with the plaster material, the plaster material may enter the rotary sliding surface. When the plastering material enters, not only the rotation operation becomes heavy, but also the rotation sliding becomes impossible in an early period (for example, 30 minutes to 4 hours). In this case, it is necessary to disassemble and wash, and this work requires a lot of labor. Moreover, when the cylindrical valve is stopped during the rotating operation such as the half-opened state, there is a disadvantage that the plastering material is easily solidified and clogged.

Further, since the air valve attached to the spray gun is arranged in the pores bored in the valve case itself of the plaster material valve, foreign matter such as fine dust mixed in the air is prevented. When troubles such as inoperability occur due to clogging, disassembling and cleaning work requires a lot of work.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent the intrusion of plastering material to ensure the opening / closing operation of the plastering material valve, and to disassemble and wash it. It is to provide a spray gun for plastering materials that can save labor for maintenance and inspection work, and can eliminate troubles that occur in air valves at an early stage.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the invention according to claim 1 is provided with a plastering material supply passage for pumping the plastering material to the spray nozzle, and a plastering material valve for opening and closing the plastering material supply passage. The plaster material valve is configured to include an elastic tube that is disposed inside the valve case and forms a part of the plaster material supply passage, and a pressing unit that crushes the elastic tube from the outside. And a configuration in which the pressing means is provided so as to be capable of performing position conversion between a closing operation position that crushes the elastic tube from the outside to block the inside of the elastic tube and an opening operation position that is separated from the elastic tube. It is a sipping thing.

The invention according to claim 2 is the device according to claim 1, wherein the pressing means extends in a direction perpendicular to the tube axis at a position separated from the elastic tube by a predetermined distance and is rotatable with respect to the valve case. Attached to the end of the support shaft that extends outside the valve case, and the handle that rotates the support shaft and the support shaft that is attached via an arm member. The elastic tube is composed of a roller that swivels in the direction in which the elastic tube is crushed. Then, at the closing operation position, the respective shaft centers of the support shaft and the roller are arranged side by side in the acting direction of the restoring force from the elastic tube.

Further, the invention according to claim 3 is the device according to claim 1, wherein an air valve that opens and closes in conjunction with the opening and closing of the plaster material valve is provided, and the valve case of this air valve corresponds to the plaster material valve. It is configured to be detachably attached to the valve case.

[0009]

[Action]

 With the above construction, in the device according to claim 1, the pressing means of the plaster material valve is converted to the closing operation position, so that the elastic tube is crushed from the outside and the supply of the plaster material in the elastic tube is stopped. When the pressing means is converted into the opening operation position, the inside of the elastic tube communicates with each other so that the plastering material can pass therethrough. Further, since the inside of the elastic tube through which the plaster material passes and the pressing means are completely separated and blocked by the elastic tube, the plaster material inside the elastic tube may enter the outside pressing means side. There is no.

In addition, in addition to the operation according to the invention described in claim 1, in the invention described in claim 2, by rotating the roller around the support shaft in a direction in which the elastic tube is crushed, the opening operation position and the closing position are closed. Since the position conversion with the operation position is performed, the position conversion operation is easy and reliable. Further, the position of the roller in the closing operation position is maintained by the restoring force generated by crushing the elastic tube, and during the closing operation of the plastering material valve, the rotation of the roller is in the middle before the closing operation position. It cannot be stopped in stages, and the position of the roller must be securely converted to the closing operation position. Therefore, the plastering material will not be clogged by stopping the closing operation in the middle.

Further, in the invention according to claim 3, in addition to the operation according to the invention according to claim 1, the air valve is interlocked with the opening / closing operation of the plastering material valve, and the inside of the air valve is When troubles such as foreign matter clogging occur, the air valve case is detachably attached to the case of the plasterer material valve, so it is easy to remove the foreign matter by removing the air valve case, or By replacing the air valve itself, the work interruption time can be shortened.

[0012]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 show a spray gun for plastering material according to an embodiment of the present invention, in which 1 is a material pressure feed pipe which is a plastering material supply passage, 2 and 2a are air hoses which are air supply passages, 3 is a plastering material valve interposed in the material pressure feeding pipe 1, and 4 is an air valve interposed between the air hoses 2 and 2a.

The material feeding pipe 1 includes two connecting pipes 5 and 6, and the plaster material valve 3 is interposed between the two connecting pipes 5 and 6. The downstream end of one connection pipe 5 is connected to a spray head 7 having a nozzle 7a, and the upstream end of the other connection pipe 6 is connected via a material hose 8 to a pump (not shown). The plastering material such as mortar and spray tiles is pressure-fed from the material tank (not shown) to the nozzle 7a through the plastering material valve 3 by driving.

A downstream end of the air hose 2 is connected to an air nozzle 9a mounted on the spray head 5, and an upstream end thereof is connected to a downstream side of an air valve 4 via an air cock 9b. The upstream side of the air valve 4 is connected to an air source by another air hose 2a via a flow switch (not shown). The air from the air source is supplied to the air nozzle 9a through the flow switch and the air valve 4 and blown out from the air nozzle 9a into the nozzle 7a. Further, when the air valve 4 is closed and the air flow in the air hose 2a is stopped, the flow switch detects the stop of the air flow and stops the driving of the plaster material pressure pump. It is supposed to do.

The plaster material valve 3 includes a valve case 10, an elastic tube 11 made of synthetic rubber or the like, a support shaft 12, and a roller 13 supported by the support shaft 12.

In the valve case 10, the end portions 5a, 6a of the two connecting pipes 5, 6 are fitted into the end portions 10a, 10a (see FIG. 3) on both sides in the material pressure feeding pipe axis X direction. In addition, the end portions 5a, 6a and the both side end portions 10a, 10a are connected by the nut members 14a, 14b while sandwiching the both side end portions of the elastic tube 11. As a result, the plaster material valve 3 and the two connecting pipes 5 and 6 are held in a state where the pipe axis X and the tube axis of the elastic tube 11 are aligned with each other, and the elastic tube 11 and the two connecting pipes are held. 5 and 6 communicate with each other, and the elastic tube 11 constitutes a part of the plastering material supply passage. The upper cover 10b of the valve case 10 is in contact with the upper surface of the elastic tube 11 to restrict upward deformation.

Further, below the elastic tube 11, the valve case 10 is bulged downward to form an accommodating portion 10c of the support shaft 12, and the outwardly projecting outward of the accommodating portion 10c. A boss portion 10d is formed. The support shaft 12 is rotatably held in the receiving portion 10C via sleeves 15 and 15 about a horizontal axis Z 1 orthogonal to the pipe axis X, and one end 12a of the support shaft 12 is provided in the boss portion 10d. It is arranged so as to penetrate through and project to the outside. A handle 16 is externally fitted to the one end portion 12a while being prevented from rotating, and the handle 16 is fixed by a cap nut 16a. An annular groove 12c is formed on the outer peripheral surface of the shaft body portion 12b of the support shaft 12 housed in the boss portion 10d, and O-rings are formed on both sides of the groove 12c in the horizontal axis Z direction. 17 are externally fitted. A gap 18 forming a part of an air supply passage is formed between the concave groove portion 12c sandwiched between these two O-rings 17 and the inner peripheral surface of the boss portion 12d.

Further, the support shaft 12 of the accommodating portion 10c is integrally formed with two arm members 12d, 12d protruding in the radial direction on both sides in the horizontal axis Z direction. , 12d are mounted parallel to the support shaft 12 in a state where the roller shaft body 13a is prevented from rotating. The roller 13 is rotatably held by the roller shaft 13a via a sleeve 13b around a roller shaft W parallel to the horizontal axis Z.

When the handle 16 is rotated, the roller 13 is rotated along with the roller shaft 13a that is rotated on a rotation locus centered on the horizontal axis Z of the support shaft 12, and the roller shaft 13a is rotated. And the closing operation position (the state shown by the solid lines in FIGS. 2 and 3) in which the two connection pipes 5 and 6 are shut off by the above-mentioned turning, and both of them 5 and 6 communicate with each other. The position is converted between the open operation position (the state indicated by the two-dot chain line in FIGS. 2 and 3). That is, in the closing operation position, the axis of the horizontal axis Z and the axis of the roller axis W are vertically aligned with the horizontal pipe axis X in the side view (see the solid line in FIG. 3), and the roller 13 is elastic. The lower surface of the tube 11 is pressed upward, and the elastic tube 11 is crushed by being sandwiched between the roller 13 and the upper cover 10b. As a result, the inner surfaces of the elastic tube 11 are closely pressed and connected to each other. The pipes 5 and 6 are cut off from each other. Further, in the open state, the horizontal axis Z and the roller axis W are arranged so as to be horizontally aligned in a side view (see a chain double-dashed line in FIG. 3), and the roller 13 is separated from the elastic tube 11. The elastic tube 11 is restored to its original circular cross section, and the two connection pipes 5 and 6 are in communication with each other. The supporting shaft 12, the roller 13, the handle 16 and the like constitute a pressing means.

As shown in detail in FIG. 5, the air valve 4 has a cylindrical air valve case 19 that is open at both ends, and a forward / backward movement of the air valve case 19 toward a tip opening 19 a thereof. A rod-shaped valve body 20 that is held so that it can be held, and a ball 21 that is housed inside the tip opening portion 19a are provided.

The air valve case 19 is detachably screwed into the boss portion 10d of the valve case 10 of the plastering material valve 3 from the outside via an O-ring 22, and through the front end opening portion 19a. The gap 18 is communicated in an airtight manner. Further, a communication hole 10e to which the air hose 2 is connected via the air cock 9b is formed in a portion of the boss portion 10d on the opposite side of the shaft 12 with the shaft portion 12b interposed therebetween. The communication hole 10e, the gap 18 and the air valve case 19 are communicated with each other, and the air hose 2 and the other air hose 2a are communicated with each other. Further, a valve seat 19b having a tapered surface is provided on the inner surface of the air valve case 19 on the side of the front end opening 19a.

The valve body 20 is formed by integrally forming a rod-shaped main body portion 20a, a tapered surface 20b on the tip side that contacts the valve seat 19b, and a tip pin portion 20c. As shown in FIG. 6, the main body 20a is formed to have a substantially triangular cross section, and each top edge 20d slidably contacts the inner surface of the air valve case 19 and is supported thereby. In addition, a gap 20e between the adjacent top edges 20d, 20d and the inner surface of the air valve case 19 forms an air passage in the air valve case 19. A coil spring 23 is disposed between the base end of the valve body 20 and the air valve case 19, and the valve body 20 is moved forward by the coil spring 23 so that the tapered surface 20b contacts the valve seat 19b. By being biased in the direction (upward in FIG. 5), the tip pin portion 20c presses the peripheral surface of the concave groove portion 12c of the support shaft 12 via the ball 21.

Further, in the recessed groove portion 12c, a recessed hole 12e into which the ball 21 is fitted is formed at a position which faces the ball 21 when the roller 13 is at the closing operation position. ing. The air valve 4 is closed at the forward position (the position shown by the solid line in FIG. 5) of the valve body 20 in which the ball 21 is fitted into the recessed hole 12e by the urging force of the coil spring 23. The air valve 4 is opened at the retracted position of the valve body 20 (the position shown by the alternate long and short dash line in FIG. 5) that has run up against the coil spring 23 from the concave hole 12e to the peripheral surface of the concave groove portion 12c. It has become. That is, in the closed state, the valve body 20 advances due to the insertion of the ball 21 into the recessed hole 12e and the tapered surface 20b abuts on the valve seat 19a. As a result, the two air hoses 2 sandwiching the air valve 4 are provided. 2a is cut off, and in the open state, the valve body 20 in the closed state is retracted and the tapered surface 20b is separated from the valve seat 19a. 2a are communicated with each other.

Next, the operation and effect of the embodiment having the above configuration will be described.

In order to spray the plastering material using the above spray gun, the plastering material valve 3 and the air valve 4 are respectively opened, and then the plastering material pressure pump is driven. In order to open the plaster material valve 3 and the air valve 4, the support shaft 12 is rotated by rotating the handle 16, and the roller 13 is swung to the open operation position. As a result, the roller 13 is separated from the elastic tube 11 so that the two connecting pipes 5 and 6 are in communication with each other, and the ball 21 of the air valve 4 is rotated by the rotation of the support shaft 12 and the peripheral surface of the concave groove portion 12c. In order to get on the vehicle, the valve body 20 is held in the retracted position so that the two air hoses 2, 2a sandwiching the air valve 4 are in communication with each other. Then, the plaster material is pressure-fed to the spray head 7, and the plaster material is sprayed from the nozzle 7a toward the object to be sprayed by the air blown from the air nozzle 9a.

When the spraying is interrupted or stopped, the handle 16 is rotated counterclockwise to the closing operation position shown by the solid line in FIG. 1 to close the plaster material valve 3. Good. By this rotation operation of the handle 16, the support shaft 12 rotates about the horizontal axis Z in the counterclockwise direction in FIG. 3, and the roller 13 closes in the counterclockwise direction on the rotation locus about the horizontal axis Z. Turn to the operating position. As a result, the roller 13 sandwiches the elastic tube 11 with the upper cover 10b and crushes it, so that the connection pipes 5 and 6 sandwiching the elastic tube 11 are cut off from each other and the spray head made of a plasterer material. The supply to 7 is stopped.

At this time, the handle 16 is stopped by the stopper 16b so as not to rotate further in the counterclockwise direction in FIG. 1, and moreover, the upstream side (the right side in FIG. 1) of the blocking portion of the elastic tube 11 has a high pressure. Then, the pressure acts on the handle 16 in the counterclockwise direction via the roller 13, so that the handle 16 is held in the closing operation position. Further, since the tensile restoring force caused by the deformation of the elastic tube 11 acts vertically on the support shaft 12 via the roller 13, the tensile restoring force also holds the roller 13 in the closing operation position. That is, even if the rotation operation of the handle 16 is stopped in the middle stage before the closing operation position, that position cannot be held. Therefore, the closing rotation operation of the handle 16 is always performed from the opening operation position to the closing operation position. It is necessary. Therefore, in the operation of stopping the spraying, the plastering material valve 3 can be surely brought into the fully closed state, and the plastering material is fixed by stopping the rotation operation at an intermediate stage such as the half-opened state. It is possible to reliably prevent the occurrence of clogging.

Then, as the handle 16 for closing the plaster material valve 3 is rotated, the ball 21 of the air valve 4 rolls on the peripheral surface of the groove 12 c of the support shaft 12, and the roller 13 is rotated. When reaches the closing operation position, the ball 21 is fitted into the recessed hole 12e and the valve body 20 advances to the advance position. By this forward movement, the taper surface 20b of the valve body 20 abuts the valve seat 19b, so that the air valve 4 can also be closed in conjunction with the closing operation of the plaster material valve 3. Then, the stop of the air flow in the air hose 2 a is detected by the flow switch, and the driving of the pump for plastering the plaster material is stopped.

Further, in the plaster material valve 3, the plaster material passes through the inside of the elastic tube 11, and the plaster material, the housing portion 10c in which the roller 13 and the support shaft 12 are housed, and the boss portion in which the air valve 4 is mounted. Since 10d is completely separated and blocked by the elastic tube 11, the plaster material does not enter the rotary sliding surfaces of the roller 13 and the support shaft 12, and troubles caused by the plaster material enter. It is possible to reliably prevent the occurrence of. Therefore, it is possible to eliminate the interruption of the spraying work due to the occurrence of the above-mentioned trouble and maintenance and inspection work such as disassembly and cleaning, and it is possible to solve these problems.

Further, since the air valve case 19 is detachable by screwing the air valve case 19 into the valve case 10 of the plastering material valve 3, the air valve 4 is caused by foreign matter mixed in the air. Even if the air passage in the valve case 19 is clogged, the air valve case 19 can be removed to easily disassemble and clean it. Further, since the air valve 4 is removable, if the above clogging occurs, the clogged air valve 4 can be replaced with another air valve 4 to shorten the interruption time of the spraying work. Can be achieved.

The present invention is not limited to the above-mentioned embodiments, but includes various modifications listed below.

In the above-described embodiment, the roller 13 and the support shaft 12 are arranged below the elastic tube 11, but the invention is not limited to this. For example, they may be reversed upside down or arranged horizontally. ..

Although the elastic tube 11 is crushed between the upper cover 10b and the roller 13 in the above-described embodiment, the invention is not limited to this. For example, a combination of a roller and a support shaft may be sandwiched between the upper and lower sides of the elastic tube. It may be provided on each of the above or on each of the left and right sides and crushed between the pair of rollers.

In the above embodiment, the position change between the opening operation position and the closing operation position of the roller is performed by the turning motion, but the invention is not limited to this. For example, the roller is linearly moved in the direction of crimping to the elastic tube. The position conversion may be performed by reciprocating.

In the above-described embodiment, the opening operation position of the roller, which is the pressing means, is set to the position where the roller is separated from the elastic tube. However, the present invention is not limited to this. The position where the roller is in contact with the elastic tube is included in the scope of the present invention as long as it is not present.

In the above embodiment, the roller is used as the pressing means, but the present invention is not limited to this, and for example, a simple rod-shaped member or a plate-shaped member whose tip edge is formed in a straight line may be used. ..

In the above embodiment, the elastic tube made of synthetic rubber is used, but the elastic tube is not limited to this, and may be made of a material that can be repeatedly deformed in a crushed state. It may be made of another synthetic resin different from rubber.

In the above embodiment, the holding operation position of the roller is held by the tensile restoring force of the elastic tube, but the present invention is not limited to this, and the holding operation can be performed by, for example, the engaging means. You may.

[0040]

[Effect of the device]

 As described above, according to the spray gun for plastering material in the invention of claim 1, the inside of the elastic tube through which the plastering material passes and the pressing means are completely separated and blocked by the elastic tube. It is possible to reliably prevent the plaster material from entering the pressing means side, and it is possible to reliably prevent troubles due to the plaster material entering. Moreover, since the plaster material supply passage is closed by crushing the elastic tube from the outside, the supply of the plaster material through the plaster material supply passage can be surely stopped.

According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, since the pressing means is composed of a rotating roller, a closing operation for crushing the elastic tube can be performed. It can be done easily. Moreover, the roller is held in the closing operation position by the restoring force caused by the deformation of the elastic tube, and the rolling operation must be performed to the predetermined closing operation position.Therefore, the position conversion operation of the roller is stopped during the closing operation. It is possible to reliably prevent the occurrence of clogging caused by the jamming.

Further, according to the invention of claim 3, in addition to the effect of the invention of claim 1, since the air valve is detachably attached to the valve case of the plasterer material valve, Even if a trouble such as clogging occurs in the air valve, the trouble can be easily solved, and the work interruption time can be shortened.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

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

5 is an enlarged view of the air valve in FIG.

6 is a cross-sectional view taken along the line DD of FIG.

[Explanation of symbols]

 1 material pressure feeding pipe (plastering material supply passage) 2, 2a air hose (air feeding passage) 3 plastering material valve 4 air valve 5, 6 connection pipe (plastering material feeding passage) 7a spray nozzle 10 plastering material valve valve case 11 elasticity Tube 12 Support shaft (pressing means) 12d Arm member (pressing means) 13 Roller (pressing means) 16 Handle 19 Air valve case X Pipe axis (tube axis of elastic tube) Z Horizontal axis (axis of support axis) W Roller axis ( (Axis parallel to the axis of the support shaft)

Claims (3)

[Scope of utility model registration request] 1. A plastering material spray gun comprising a plastering material supply passage for feeding a plastering material to a spray nozzle under pressure, and a plastering material valve for opening and closing the plastering material supply passage, wherein the plastering material valve is in a valve case. An elastic tube that is disposed in a part of the plaster material supply passage,
A pressing means for crushing the elastic tube from the outside, the pressing means crushing the elastic tube from the outside to close the inside of the elastic tube;
A spray gun for plastering material, wherein the spray gun is provided so as to be convertible between an opening operation position separated from the elastic tube. 2. The pressing means extends at a position spaced apart from the elastic tube by a predetermined distance in a direction orthogonal to the tube axis and is supported by the valve case so as to be rotatable, and the pressing means extends outside the valve case. It is composed of a handle attached to the end of the support shaft and rotating the support shaft, and a roller attached to the support shaft via an arm member and rotating in a direction of crushing the elastic tube by the rotation of the support shaft. The spray gun for plastering material according to claim 1, wherein, in the closing operation position, the respective shaft centers of the support shaft and the roller are arranged so as to be aligned in a direction in which a restoring force from the elastic tube acts. 3. An air valve that opens and closes in conjunction with opening and closing of a plaster material valve, and the valve case of this air valve is detachably attached to the valve case of the plaster material valve. Spray gun for plasterer material.