JP2538963Y2 - Gun for spraying mortar, etc. - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray gun used for spraying a fluid building material such as mortar on a wall or the like.

[0002]

2. Description of the Related Art A gun for spraying mortar or the like discharges a fluid building material such as mortar or rock wool by the power of air or water, and is widely used in construction sites and the like. As shown in FIG. 8, the spray gun g for mortar or the like includes a nozzle n, a connecting pipe p1 for a building material and a connecting pipe p2 for a discharge fluid connected to the nozzle n, and both connecting pipes p1 and p2. And opening / closing means b1 and b2 arranged respectively. The two conduits p1 and p2 are formed of metal pipes, and a valve such as a ball valve is used for the two opening / closing means b1 and b2.
The rotation axes of the two ball valves 1 and 2 are made coaxial so that they open and close simultaneously.

[0003] In use, the two conduits p1, p2 are
Pump p for mortar etc. through tubes t1 and t2
And open / close means b1 and b2, and discharge from nozzle n by the force of air such as mortar and blow it to a wall or the like. When the spraying is stopped, both opening / closing means b1 and b2 are closed.

[0004]

However, building materials, such as mortar, have high adhesiveness and contain many impurities, even though they have fluidity. Therefore, if a valve such as a ball valve is used for the opening / closing means b1 for the building material,
Mortar, etc. easily clogs the valve. Further, since the valve requires many parts such as a sealing material, maintenance is difficult, and if the valve fails due to use, it is necessary to replace the entire valve. On the other hand, with respect to the opening / closing means b2 for discharge fluid such as air, clogging does not occur as frequently as the opening / closing means b1 for building material, but the building material flows backward from the nozzle n to the opening / closing means b1 for building material. In some cases, when a backflow occurs, the same problem as the opening / closing means b1 for building materials occurs. Accordingly, an object of the present invention is to provide a gun for spraying mortar or the like, in which a failure such as clogging hardly occurs and maintenance and replacement of parts are easy.

[0005]

Means for Solving the Problems The present invention provides a nozzle 2
And a connecting pipe 3 for building material and a connecting pipe 4 for discharged fluid connected to the nozzle 2, and opening and closing means arranged in each of the two connecting pipes 3 and 4. And sending a fluid building material such as mortar or rock wool from the conducting pipe 3 for the building material to the nozzle 2 and sending a discharged fluid such as air or water from the conducting pipe 4 for the discharged fluid to the nozzle 2. By providing a spray gun such as mortar which discharges these from the nozzle 2 and closes both opening and closing means to stop the discharge, the spray gun is characterized by the following configuration. To solve the problem. In the gun for spraying mortar or the like of the present invention, at least the conductive tube 3 for the building material among the two conductive tubes 3 and 4 is formed of a flexible tube. Further, among the above two opening and closing means, at least the opening and closing means for building materials,
It is composed of a closing member 13 for closing the tube 3 by a deforming operation such as pressing or bending on the tube 3 and an operating member 12 for movably supporting the closing member 13. Tube 3
Opening and closing.

[0006]

According to the invention of the present application, at least the conducting pipe 3 for building material is constituted by a flexible tube 3, and the closing member 1 is moved by moving the operating member 12.
3 performs a deforming operation such as pressing or bending on the tube 3 as a conductive tube for the building material, and closes the tube 3. Therefore, unlike the valve, clogging is unlikely to occur, and the structure is simple, so that maintenance is easy. Especially during normal maintenance, water is
The clogging is eliminated just by passing through. Moreover, even if the unresolved clogging of the tube 3 occurs, the tube 3
You only need to replace it. In addition, the discharge pipe such as air or water also opens and closes the discharge pipe for discharge fluid by the same configuration, so that even if a building material such as mortar flows backward, clogging hardly occurs. Tube exchange is also easy.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a central vertical sectional view of a mortar or the like spraying gun according to one embodiment, FIG. 2 is a plan view of the gun with a nozzle removed, FIG. 3 is an enlarged sectional view taken along line III-III of FIG. FIG. 5 is a front view of the relevant part as viewed from the arrow IV in FIG. 2, and FIG. 5 is a partially omitted right side view as viewed from the arrow V in FIG.

This gun comprises a metal body 1, a nozzle 2 arranged at the tip (left end in FIG. 1) of the body, and a flexible material arranged along the body. A tube 3 and an air tube 4 are provided.

The main body 1 is formed of a long body having an inverted U-shaped cross section, and a front end fixing portion 101 is provided at the front end thereof.
The tip fixing portion 101 has a semicircular cross section, and a tip fixing piece 5 having the same semicircular cross section is applied from below the tip fixing portion 101 to form a space having a circular cross section. The two 101 and 5 are fixed by screws 6 and 6.

The tip of the material tube 3 is fixed between the tip fixing piece 5 and the tip fixing part 101. More specifically, the base end of the metal connection pipe 7 is connected to the material tube 3.
And the metal connection pipe 7 and the material tube 3 are sandwiched between the tip fixing piece 5 and the tip fixing portion 101. On the outer periphery of the base end of the connection pipe 7,
A step 71 for retaining is formed. Therefore, the material tube 3 can be easily removed by removing the distal end fixing portion 101 and pulling out the material tube 3 from the connection pipe 7. On the other hand, a male screw is formed on the outer periphery of the distal end of the connection pipe 7, and the male screw is screwed into a female screw formed in the material introduction portion 201 of the nozzle 2, so that the material tube 3 and the nozzle 2 are connected to each other. Are connected via a connection pipe 7.

As the nozzle 2, it is sufficient to adopt a nozzle widely used for this kind of gun.
01 and the air introduction part 2 to which the tip of the air tube 4 is connected
02, and the material and air introduced from both 201 and 202 are discharged from the front end 203.

Next, a base fixing portion 10 is provided at the base end of the main body 1.
2 are provided. The base fixing portion 102 has a semicircular cross section, and the base fixing piece 8, which also has a semicircular cross section, is applied from below the base fixing portion 102 to form a space having a circular cross section. These two members 102 and 8 are fixed by screws 9 and 9.

The base end of the material tube 3 is fixed between the base fixing piece 8 and the base fixing part 102. More specifically, the distal end of the metal connection pipe 10 is inserted into the base end of the material tube 3, and the metal connection pipe 10 and the material tube 3 are separated by the base fixing piece 8 and the base fixing part 102. Is sandwiched between. A step 11 for retaining is formed also on the outer periphery of the base end of the connection pipe 10. Accordingly, the material tube 3 can be easily removed by removing the base end fixing portion 102 and pulling out the material tube 3 from the connection pipe 10. On the other hand, this connection pipe 11
A male screw is formed on the outer circumference of the base end of the. Although not shown, the tip of a mortar hose connected to a mortar pump is screwed into this male screw. The base end fixing portion 102 is provided with an air connection portion 103.
The proximal end of the air tube 4 is connected to the air connection portion 103 by screwing, and the distal end of an air hose (not shown) connected to an air conditioner is connected thereto.

Next, at the center of the main body 1, an opening / closing means for the material tube 3 and an air tube 4 are provided. The two opening / closing means are operated by the same rotating shaft 12. First, the opening / closing means of the material tube 3 will be described with reference to FIGS.

The opening / closing means for the material tube 3 includes a rotating shaft 12 as a rotating member, and a pressing roller 13 for rotating the rotating shaft 12 to press the material tube 3. The rotating shaft 12 is rotatably supported by the main body 1 near both ends. For this support, in this part, both ends of the main body 1 having an inverted U-shaped cross section
It extends slightly below the other parts. As shown in FIG. 3, a pair of support arms 14, 14 are provided on the rotation shaft 12 so as to protrude in a radially outward direction.
A support shaft 15 is inserted between the support shafts 4, and a pressing roller 13 is rotatably mounted on the support shaft 15.

A handle 16 is attached to one end (the right end in FIG. 3) of the rotating shaft 12 with a screw 17.
By turning the handle 16, the material tube 3 is opened and closed. The state shown in the figure shows a closed state, in which the pressing roller 13 is located on the upper side and presses the material tube 3 between itself and the upper wall of the main body 1 having an inverted U-shaped cross section. In this embodiment, the pressing piece 18 is fixed to the upper wall of the main body 1 with a screw in order to surely perform the pressing. This pressing piece 18 is, as shown in FIG.
It has a central concave portion 18a, and convex portions 18b and 18c before and after the central concave portion 18a. The pressing roller 13 presses the material tube 3 and fits into the central concave portion 18a, thereby securely closing the material tube 3. Make Further, the central concave portion 18a is formed separately from the pressing piece 18, and is arranged so as to be slidable in the vertical direction in FIG. 1 so that the depth of the concave portion can be adjusted. May be. In the embodiment shown in FIG. 1, a screw 19 is screwed into the main body 1, and only the central concave portion 18a is attached to the tip of the main body 1 so that the main body 1 can slide. On the other hand, the open state
In this state, the handle 16 is rotated by about 90 degrees from the state shown in the figure, the pressing roller 13 is separated from the pressing piece 18, and the material tube 3 is opened.

Next, the means for opening and closing the air tube 4 will be described. The air tube opening / closing means may be a conventional ball valve. In this embodiment, the air tube 4 is bent to close it. Describing this configuration, as shown in FIGS. 3 and 4, a pair of bending pins 21 and 21 project from the other end (left end in FIG. 3) of the rotating shaft 12. The interval between the pair of bending pins 21 and 21 may be appropriately determined as long as the air conduction of the air tube 4 is not hindered. In this embodiment, the interval is substantially equal to the outer diameter of the air tube 4. . An outer annular portion 22 protrudes from the main body 1 outside the bending pins 21 and 21. A pair of notches 23, 23 are formed in the outer annular portion 22 so as to face each other in the diametrical direction. The width of the cutouts 23, 23 may be appropriately determined within a range that does not hinder air conduction. In this embodiment, the width is substantially equal to the outer diameter of the air tube 4.
Further, the distance between the bending pin 21 and the inner peripheral surface of the outer annular portion 22 is substantially equal to or slightly smaller than the outer diameter of the air tube 4. Then, the air tube 4 is guided into the outer annular portion 22 from one notch portion 23, and is led out of the other notch portion 23 to the outside of the outer annular portion 22 through the bending pins 21 and 21. FIG. 4 shows a closed state. In this state, both the bending pins 21 and 21 are located on a straight line connecting the notches 23, 23, and the air tube 4 is closed.
Is bent in a substantially Z-shape, and air conduction is closed. On the other hand, when the handle 16 is rotated by about 90 degrees from the state shown in the figure, the air tube 4 becomes straight, and air flows freely. In addition, it is also possible to apply the opening / closing structure by bending to the material tube 3.

As described above, in this embodiment, the material tube 3 and the air tube 4 are opened and closed by rotating the handle. At this time, when the pressing roller 13 is rotated in the direction of the arrow R (clockwise) in FIG. 1, the material tube 3 is pressed between the pressing piece 18 and the convex portion 18 b in front of the pressing piece 18, and the flow of the material is reduced. Stop. After that, the pressing roller 13
It retreats by clockwise rotation and is located in the central concave portion 18a.
As described above, when the pressing roller 13 retreats in a state where the pressing is maintained, the pressure inside the material tube 3 at the tip end side of the pressing roller 13 becomes negative pressure by the amount of retreat, and the dripping of the material from the nozzle 2 causes Can be prevented. On the other hand, the pressing roller 13
When the roller is rotated in the opposite direction (counterclockwise) to the direction of arrow R in FIG. 1, the pressing roller 13 moves in the direction of the material flow, so that the closed state can be achieved with relatively little resistance, and the tube is durable. Sex can be increased. As described above, since there are advantages and disadvantages in any of the rotation directions, the rotation may be appropriately changed in consideration of the viscosity of the material and the like.

In this embodiment, the opening and closing of the material tube 3 and the air tube 4 are simultaneously performed by rotating the handle 16, but they are separately opened and closed by separate rotating shafts. You may. Further, even in the case of coaxial, the material tube 3 may be closed earlier than the air tube 4. Further, a temporary fixing means for the handle 16 may be provided at an intermediate position between the open state and the closed state to obtain a half open state.

Next, another embodiment will be described with reference to FIGS. 6 and 7. FIG. As in the previous embodiment, this gun also has a metal main body 301, a nozzle 302 arranged at the tip (the left end in FIGS. 6 and 7) of the main body, and is arranged along the main body. A flexible material tube 303 and an air tube 304 are provided, and the material tube 303 and the air tube 304 are pressed to open and close.

The connection relationship between the nozzle 302, the material tube 303, and the air tube 304 is substantially the same as in the previous embodiment.
04, a metallic material pipe 305 and an air pipe 3
06 is connected.

The structure for opening and closing will be described with reference to FIG. In FIG. 6, each part in the open state is drawn by a solid line and a dotted line,
Each part in the closed state is drawn by a two-dot chain line. First, in this embodiment, a handle 310 is used for opening and closing operations. The handle 310 has a tip pivotally attached to the main body 301 by a shaft 311. This handle 3
In the middle of 10, an interlocking rod 312 is rotatably mounted by a shaft 313. A pressing rod 315 is rotatably attached to a tip of the interlocking rod 312 by a shaft 314. In the middle of the pressing rod 315, the long hole 31
6 are provided. The main body 301 is inserted into the long hole 316.
The pin 317 fixed to is inserted slidably. At the end of the pressing rod 315, a roller 3 for pressing the tube is provided.
18 and an interlocking pressing portion 319 are provided. further,
An air tube opening / closing piece 410 having an air tube pressing portion 411 at its tip is rotatably moved by a shaft 413 to the main body 3.
01 is attached. This air tube opening / closing piece 4
The base 10 rotates when its base end 412 is pressed by the interlocking pressing part 319, and presses and closes the air tube 304.

The opening / closing operation state will be described with reference to FIG. The handle 310 is opened (the state shown by the solid line and the dotted line in FIG. 6).
From the state (closed by the two-dot chain line in FIG. 6), the pressing rod 315, the tube pressing roller 318, the interlocking pressing section 3
19, the air tube opening / closing piece 410 changes from the state shown in FIG. 7A to the state shown in FIG. That is,
(A) is in the open state, and in (B), the tube pressing roller 318 presses the material tube 303 to close it. When the handle is further rotated, the interlocking pressing portion 3
19 presses the base end 412 of the air tube opening / closing piece 410, and the air tube pressing portion 411 presses the air tube 304 to close it. During this movement from (B) to (C),
The tube pressing roller 318 is connected to the material tube 303.
In order to make the distal end of the material tube 303 have a negative pressure, the material is prevented from dripping from the nozzle.

As described above, in each of the embodiments, since the material and air are opened and closed by pressing or bending the tube or a combination thereof, it is possible to prevent clogging of each tube which is likely to be caused by a material having a high viscosity such as mortar. Can be. Further, the number of parts is small, and even if clogging or failure occurs, it is sufficient to replace only the tube, and maintenance is easy.

[0025]

As described above, according to the present invention, it is possible to provide a spray gun for mortar or the like in which a failure such as clogging hardly occurs and maintenance and replacement of parts are easy.

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional view of a spray gun for mortar or the like according to an embodiment.

FIG. 2 is a plan view of the gun with a nozzle removed.

FIG. 3 is an enlarged sectional view taken along line III-III of FIG. 2;

FIG. 4 is a main part front view as viewed from an arrow IV in FIG. 2;

FIG. 5 is a partially omitted right side view viewed from an arrow V in FIG. 2;

FIG. 6 is a side view of a mortar or the like spraying gun according to another embodiment.

FIG. 7 is an explanatory view of a use state of the gun.

FIG. 8 is an explanatory view of a conventional spray gun for mortar or the like.

[Explanation of symbols]

 2 Nozzle 3 Material tube (conducting tube for building material) 4 Air tube (conducting tube for discharge flow) 12 Rotating shaft 13 Press roller 21 Bending pins 21 and 21

Claims (1)

(57) [Scope of request for utility model registration] A nozzle (2), a conduit (3) for a building material connected to the nozzle (2), and a conduit (4) for a discharge fluid.
And opening / closing means arranged in each of the two conduits (3) and (4) .When both the opening / closing means are in an open state, a fluid building material such as mortar or rock wool is electrically connected to the building material. Nozzle from tube (3)
(2) and the discharge fluid such as air and water from the discharge fluid conduit (4) to the same nozzle (2) to discharge them from this nozzle (2) and close both opening and closing means. In a spray gun such as mortar, the discharge of which is stopped as a state, at least one of the two conductive tubes (3) and (4)
(3) is composed of a flexible tube (3), and at least one of the two opening / closing means is an opening / closing means for a building material;
It comprises a closing member (13) for closing the tube (3) by a deformation operation such as pressing or bending against the tube (3), and an operating member (12) for movably supporting the closing member (13). A spray gun for mortar or the like, characterized in that the operating member (12) is operated to open and close the tube (3).