Filter structure and caulking gun

Abstract

To provide a filter structure and a caulking gun that reduce the effect of air bubbles generated inside a filler. [Solution] A filter structure 1 is arranged in a flow path of filler 14 along a discharge direction X from the supply side to the discharge side, and comprises a discharge section 12 having a guide section 121 having a flow space 121c through which the filler 14 flows, and a discharge port 122 formed on the discharge side of the guide section 121 and communicating with the flow space 121c, and a bubble reduction section 11 arranged on the supply side of the discharge port 122 and having a plurality of bubble reduction holes, and at least a portion of the filler 14 is discharged from the discharge port 122 of the discharge section 12 towards the discharge side after passing through the bubble reduction holes of the bubble reduction section 11.

Description

[Technical field]

[0001] The present disclosure relates to a filter structure and a caulking gun. [Background technology]

[0002] In the field of construction, a sealing technique is known in which a sealant (filler) is filled into the gaps between the joints of building materials to ensure waterproofing, etc. The uncured sealant filled in by the sealing technique hardens over time, and when it is completely cured, it is fixed to the building materials. Since this sealing technique is often used on the finished surfaces of buildings (such as window frames), the finished surface of the sealant is required to be uniform and smooth.

[0003] Therefore, a conventional method is known in which a caulking gun is used to fill gaps in joints between building materials with an uncured sealing material, as disclosed in Patent Document 1, for example. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2004-100392 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, conventional sealing methods have a problem in that air bubbles are generated inside the sealant when the sealant is filled into the gaps between the joints of building materials before hardening. If air bubbles are generated inside the sealant during filling, unevenness will appear on the finished surface of the sealant, which will impair the design of the building. The unevenness of the finished surface of the sealant is not apparent immediately after filling, but gradually appears over time, making it difficult to take measures by visual inspection.

[0006] The present disclosure has been made in consideration of the above circumstances, and aims to provide a filter structure and a caulking gun that reduce the effects of air bubbles that occur inside the filler. [Means for solving the problem]

[0007] In order to solve the above problems, the present disclosure proposes the following means. The filter structure according to the present disclosure is a filter structure that is arranged in a flow path of a filler along a discharge direction from the supply side to the discharge side, and includes a discharge section having a guide section having a flow space through which the filler flows, and a discharge port formed on the discharge side of the guide section and communicating with the flow space, and a bubble reduction section that is arranged on the supply side of the discharge port and has a plurality of bubble reduction holes, and at least a portion of the filler is discharged from the discharge port of the discharge section towards the discharge side after passing through the bubble reduction holes in the bubble reduction section. Effect of the Invention

[0008] The filter structure and caulking gun of the present disclosure can reduce the effects of air bubbles that form inside the filler. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a side view of a caulking gun according to an embodiment of the present disclosure. [Diagram 2] FIG. 1 is a cross-sectional view of a caulking gun according to an embodiment of the present disclosure. [Diagram 3] FIG. 1 is a perspective view of a filter according to an embodiment of the present disclosure. [Figure 4] FIG. 1 is an assembly diagram illustrating an installation state of a filter according to an embodiment of the present disclosure. [Diagram 5] 1A and 1B are diagrams illustrating the effect of reducing air bubbles by a filter structure according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] In the embodiment of the present disclosure, a filter structure 1 in which sealing is performed using a caulking gun 2 is illustrated. A filter structure 1 according to an embodiment of the present disclosure will be described with reference to FIGS. 1-5. The drawings are schematic diagrams for easily explaining the configuration, and the dimensional ratios of each component may differ from the actual ones. The drawings appropriately show an X-axis, a Y-axis, and a Z-axis. The direction along the Z-axis is the vertical direction. The direction along the X-axis is one of the horizontal directions perpendicular to the vertical direction. The direction along the Y-axis is one of the horizontal directions perpendicular to the vertical direction that is perpendicular to the X-axis. In the following description, the direction along the X-axis is called the "discharge direction X", the direction along the Y-axis is called the "front-rear direction Y", and the direction along the Z-axis is called the "vertical direction Z". The side of the vertical direction Z toward which the arrow of the Z-axis points is the upper side (+Z side), and the opposite side of the vertical direction Z toward which the arrow of the Z-axis points is the lower side (-Z side). The side where the arrow on the X-axis in the discharge direction X points is defined as the discharge side (+X side), and the side opposite to the side where the arrow on the X-axis in the discharge direction X points is defined as the supply side (-X side). The side where the arrow on the Y-axis in the front-to-back direction Y points is the rear side (+Y side), and the side opposite to the side where the arrow on the Y-axis in the front-to-back direction Y points is the front side (-Y side).

[0011] <Caulking gun configuration> FIG. 1 is a side view showing a caulking gun 2. As shown in FIG. The caulking gun 2 is a tool that ejects a sealing material (filler) 14 toward an object to be filled, such as a window frame, and is a general-purpose product that is widely used for general sealing work. The caulking gun 2 includes a nozzle portion 21, a filter structure 1, a cylinder portion 22, a handle portion 23, a piston rod 24, a pushing portion 25, and a locking portion 26.

[0012] <Nozzle section> FIG. 2 is a cross-sectional view of the caulking gun 2 shown in FIG. 1, showing a cross section cut at the center in the front-rear direction Y. The nozzle portion 21 is a general-purpose resin member extending in the discharge direction X, and is disposed at the end of the discharge side (+X side) of the caulking gun 2. The nozzle portion 21 is formed in a substantially cylindrical shape that narrows from one end of the supply side (-X side) toward the other end of the discharge side (+X side), and is provided so that the sealing material 14 can flow through the inside 21c.

[0013] A nozzle opening 211 is formed at the end of the discharge side (+X side) of the nozzle portion 21. The nozzle opening 211 is a hole formed facing the discharge direction X, and is provided so as to communicate with the interior 21c of the nozzle portion 21.

[0014] A nozzle connection part 212a is formed at the end of the supply side (-X side) of the nozzle part 21. The nozzle connection part 212a is a detachable fastening part in which, for example, the inner surface 21a is formed in a female thread shape, and is connected to a nozzle connection part 212b of the filter structure 1 described later.

[0015] The material and configuration of the nozzle portion 21 are not particularly limited as long as it can be connected to the filter structure 1 and can eject the sealing material 14 . For example, the nozzle portion 21 may be formed of a steel member. The nozzle portion 21 may be connected to the filter structure 1 by an engagement or other configuration, or may be formed integrally with the filter structure 1. The nozzle portion 21 may be formed in a polygonal shape when viewed from the front in the discharge direction X. Furthermore, the caulking gun 2 may not include the nozzle portion 21 and may be configured to discharge the sealing material 14 from the filter structure 1.

[0016] <Filter structure> The filter structure 1 is a portion including a filter (bubble reduction portion) 11, a discharge portion 12, and a packing 13, and is disposed on the supply side (−X side) of the nozzle portion .

[0017] The discharge part 12 is a steel member formed in a circular shape larger than the nozzle part 21 when viewed from the front in the discharge direction X. A guide part 121 having a substantially cylindrical shape facing the discharge direction X is formed in the middle part of the discharge part 12. The guide part 121 is provided so that the sealing material 14 can flow through an inside (flow space) 121c.

[0018] A nozzle connection part 212b is formed at the end of the discharge side (+X side) of the guide part 121. The nozzle connection part 212b is formed in a substantially cylindrical shape that protrudes slightly further toward the discharge side (+X side) from the end of the discharge side (+X side) of the guide part 121. This nozzle connection part 212b is a detachable fastening part in which, for example, the outer surface 121b is formed in a male screw shape, and is connected to the nozzle connection part 212a of the nozzle part 21.

[0019] An outlet 122 is formed from the end of the outlet side (+X side) of the guide portion 121 to the end of the outlet side (+X side) of the nozzle connection portion 212b. The outlet 122 is a hole (inside the cylinder of the nozzle connection portion 212b) formed in a direction facing the outlet direction X, and is formed in a circular shape smaller than that of the nozzle connection portion 212b when viewed from the front in the outlet direction X. An end of the supply side (-X side) of the outlet 122 is provided so as to communicate with the interior 121c of the guide portion 121. Also, an end of the outlet side (+X side) of the outlet 122 is provided so as to communicate with the interior 21c of the nozzle portion 21.

[0020] A cylinder connection part 124a is formed at the end of the supply side (-X side) of the guide part 121. The cylinder connection part 124a is a detachable fastening part in which, for example, an inner surface 121a is formed in a female thread shape, and is connected to a cylinder connection part 124b of the cylinder part 22 described later.

[0021] The filter 11 is a member formed in a circular shape that is smaller than the guide portion 121 and larger than the discharge port 122 when viewed from the front in the discharge direction X. The shape of the filter 11 will be described with reference to FIG. 3. FIG. 3 is a perspective view showing the filter 11. The filter 11 is formed of a plate-like member having rigidity, such as a thin iron plate. In this filter 11, a center portion 111 of a filter body 110 is formed in a convex shape toward the discharge side (+X side). Furthermore, a plurality of bubble reduction holes 112 are formed in the filter body 110. The bubble reduction holes 112 are circular holes having a diameter of about 1 mm formed to face the discharge direction X, for example, and are provided so that the sealing material 14 can flow through them. The plurality of bubble reduction holes 112 are regularly formed on the entire surface of the filter body 110, for example, with intervals of about 0.5 mm between each other. The filter 11 thus formed is disposed in the interior 121c of the guide portion 121 so as to face the discharge direction X.

[0022] The packing 13 is a rubber member formed in a ring shape slightly smaller than the guide part 121 when viewed from the front in the discharge direction X. The packing 13 is disposed inside 121c of the guide part 121 and on the discharge side (+X side) of the filter 11, facing the discharge direction X.

[0023] Fig. 4 is an assembly diagram showing an installation state of the filter structure 1. As shown in Fig. 4, the discharge part 12 is connected to the cylinder part 22 in a state in which the filter 11 and the packing 13 are arranged. Therefore, in a state in which the discharge part 12 is connected to the nozzle part 21 and the cylinder part 22, the filter 11 and the packing 13 are fitted and held in the interior 121c of the guide part 121.

[0024] The material and configuration of the filter structure 1 are not particularly limited as long as the sealing material 14 flowing from the supply side (−X side) can pass through the bubble reduction holes 112 of the filter 11 and be discharged from the discharge port 122. For example, the filter 11, the discharge section 12, and the packing 13 may be made of resin or the like. The packing 13 may or may not be disposed on the supply side (-X side) of the filter 11. The filter 11, the discharge section 12, and the packing 13 may be formed in a polygonal shape when viewed from the front in the discharge direction X. The filter structure 1 may be connected to the nozzle section 21 and the cylinder section 22 by a configuration such as engagement, or may be formed integrally with the nozzle section 21 and the cylinder section 22. The filter 11 may be connected to the discharge section 12, or may be formed integrally with the discharge section 12. The bubble reduction hole 112 may be formed to have a diameter larger or smaller than approximately 1 mm, and may be formed in a polygonal shape. The filter 11 may be formed of a soft material such as a net constructed of thread-like thin metal wires.

[0025] <Cylinder section> 1-2, the cylinder portion 22 is a general-purpose steel member formed in a cylindrical shape extending in the discharge direction X, and is disposed on the supply side (-X side) of the filter structure 1. When viewed from the front in the discharge direction X, the cylinder portion 22 is formed in a circular shape that is substantially the same as the inner surface 121a of the guide portion 121. The cylinder portion 22 is also provided so that the sealing material 14 can flow through the inside 22c.

[0026] A cylinder connection part 124b is formed at the end of the discharge side (+X side) of the cylinder part 22. The cylinder connection part 124b is a detachable fastening part in which, for example, the outer surface 22b is formed in a male thread shape, and is connected to the cylinder connection part 124a of the filter structure 1.

[0027] A handle connection part 211b is formed at the end of the supply side (-X side) of the cylinder part 22. The handle connection part 211b is a detachable fastening part in which, for example, the outer surface 22b is formed in a male thread shape, and is connected to a handle connection part 211a of the handle part 23 described later.

[0028] The material and configuration of the cylinder portion 22 are not particularly limited as long as it can be connected to the filter structure 1 and the handle portion 23 and allows the sealing material 14 to flow therethrough. For example, the cylinder portion 22 may be formed from a material such as resin. The cylinder portion 22 may be connected to the filter structure 1 and the handle portion 23 by a configuration such as engagement, or may be formed integrally with the filter structure 1 and the handle portion 23. The cylinder portion 22 may be formed in a polygonal shape when viewed from the front in the discharge direction X.

[0029] <Handle section> The handle portion 23 is a general-purpose steel member having a pair of gripping portions, and is disposed on the supply side (-X side) of the cylinder portion 22. The handle portion 23 includes a handle main body portion 231, a fixed gripping portion 232, and a rotating gripping portion 233.

[0030] The handle main body 231 is formed in a substantially rectangular shape in a side view seen from the front-rear direction Y. A handle connection part 211a is formed at the end of the discharge side (+X side) of this handle main body 231. The handle connection part 211a is a detachable fastening part formed, for example, in the shape of a female screw, and is connected to the handle connection part 211b of the cylinder part 22.

[0031] The pushing part 25 is formed in the center of the handle main body 231. A rotating connection part 233a is formed in the handle main body 231 located below (-Z side) the pushing part 25. The rotating connection part 233a is, for example, a through hole provided so that a pin connector can be inserted, and is connected to a rotating connection part 233b of the rotating grip part 233 described later so as to be rotatable in the discharge direction X.

[0032] Further, a rod insertion hole (insertion hole) 2311 is formed in the handle main body 231. The rod insertion hole 2311 is a through hole formed in a circular shape slightly larger than a shaft portion 241 of the piston rod 24 described later when viewed from the front in the discharge direction X.

[0033] The fixed grip portion 232 is formed in a generally rod-like shape extending further downward (-Z side) from the lower side (-Z side) of the supply side (-X side) of the handle main body 231. The fixed grip portion 232 is formed integrally with the handle main body 231. In addition, the fixed grip portion 232 has a stepped fixed grip surface 2321 formed on the supply side (-X side) surface.

[0034] The rotating grip part 233 is a generally rod-shaped member formed and arranged to form a pair with the fixed grip part 232. Unlike the fixed grip part 232, the rotating grip part 233 is formed independently from the handle main body part 231. A rotating connection part 233b is formed at the end part on the upper side (+Z side) of the rotating grip part 233. The rotating connection part 233b is a part equipped with a shaft part similar to a pin connector, for example, and is connected to the rotating connection part 233a of the handle main body part 231 so as to be rotatable in the discharge direction X. The other end of the rotating grip part 233 is disposed on the lower side (-Z side) in a state where it is joined to the handle main body part 231. At this time, in the vertical direction Z, the lower side (-Z side) end part of the rotating grip part 233 and the lower side (-Z side) end part of the fixed grip part 232 are disposed at substantially the same position. Also, the fixed grip part 232 has a stepped rotating grip surface 2331 formed on the discharge side (+X side) surface.

[0035] The material and configuration of the handle portion 23 are not particularly limited as long as it can be connected to the cylinder portion 22 and the piston rod 24 can be inserted therethrough. For example, the handle portion 23 may be made of resin or the like. The rotating grip portion 233 and the fixed grip portion 232 may be integrally formed. The number of members of the rotating grip portion 233 and the fixed grip portion 232 is not limited as long as they can be gripped.

[0036] <Piston rod> The piston rod 24 is a general-purpose steel member formed in a generally rod-like shape extending in the discharge direction X, with its discharge-side (+X-side) end disposed inside 22c of the cylinder portion 22 and its supply-side (-X-side) end disposed at the supply-side (-X-side) end of the caulking gun 2. The piston rod 24 includes a shaft portion 241, a pressing portion 242, and a pulling portion 243.

[0037] The shaft portion 241 is a portion extending in parallel along the discharge direction X, and is formed in a cylindrical shape. This shaft portion 241 is formed slightly smaller than the rod insertion hole 2311 of the handle main body 231 in a front view seen from the discharge direction X. The shaft portion 241 is inserted through the rod insertion hole 2311 so as to be able to advance and retreat in the discharge direction X.

[0038] The pressing portion 242 is a portion formed at the end of the shaft portion 241 on the discharge side (+X side), and is formed in a cylindrical shape larger than the shaft portion 241. The pressing portion 242 is formed in a shape similar to but slightly smaller than the cross-sectional shape of the cylinder portion 22 when viewed from the front in the discharge direction X. The pressing portion 242 is disposed inside 22c of the cylinder portion 22.

[0039] The pull-out portion 243 is a portion formed at the end of the supply side (-X side) of the shaft portion 241, and is formed by bending the shaft portion 241 toward the upper side (+Z side). The pull-out portion 243 is formed in a substantially U-shape in side view seen from the front-rear direction Y.

[0040] The material and configuration of the piston rod 24 are not particularly limited as long as the pressing portion 242 can advance and retreat in the discharge direction X. For example, the piston rod 24 may be made of resin or the like. Also, the shaft portion 241 and the pressing portion 242 may be formed in a polygonal shape when viewed from the front in the discharge direction X. The pulling portion 243 may be formed in a circular shape or the like, or may not be provided.

[0041] <Pushing section> The pushing part 25 is a part formed in the center of the handle main body 231, and is constructed in a substantially rectangular space in a side view seen from the front-rear direction Y. The pushing part 25 includes a pushing spring (spring part) 251 and a pushing metal fitting 252.

[0042] The forward spring 251 is a general spring member formed in a substantially cylindrical shape that is elastically deformable in the discharge direction X. This forward spring 251 is disposed so that an end portion on the discharge side (+X side) abuts against the handle main body 231. In addition, the forward spring 251 is formed in a ring shape larger than the shaft portion 241 of the piston rod 24 when viewed from the front in the discharge direction X, and the shaft portion 241 is inserted through the forward spring 251. The pushing spring 251 is biased in a state in which the fixed grip portion 232 and the rotating grip portion 233 are separated from each other, that is, in a state in which the pushing spring 251 is compressed in the discharge direction X.

[0043] The push fitting 252 is a steel member formed in a plate shape extending in the vertical direction Z in a side view seen from the front-rear direction Y. In a front view seen from the discharge direction X, the push fitting 252 has a push insertion hole 2521 formed as a circular insertion hole smaller than the push spring 251 and larger than the shaft portion 241. The end of the push insertion hole 2521 on the discharge side (+X side) is disposed so as to abut against the end of the push spring 251 on the supply side (-X side). The shaft portion 241 is inserted into the push insertion hole 2521. The end of the lower side (-Z side) of the push fitting 252 is connected to the upper side (+Z side) of the rotating grip portion 233.

[0044] In the pushing section 25 constructed in this manner, when the rotating grip section 233 is not rotating, the pushing fitting 252 is parallel to the vertical direction Z and does not come into contact with the shaft section 241. On the other hand, when the rotating grip section 233 is rotated, the pushing fitting 252 pushes forward. At this time, the upper (+Z side) end of the pushing fitting 252 is slightly inclined toward the supply side (-X side) and comes into contact with the shaft section 241, causing the entire piston rod 24 to move forward toward the discharge side (+X side).

[0045] The material and configuration of the pushing portion 25 are not particularly limited as long as it can push the pressing portion 242 of the piston rod 24 in the discharge direction X. For example, the pushing part 25 may be configured to move the pressing part 242 in the discharge direction X by hydraulic pressure or air pressure. The pushing metal fitting 252 may be in contact with the upper side (+Z side) of the rotating grip part 233, or may be formed integrally therewith.

[0046] <Latching part> The locking portion 26 is a portion formed on the supply side (−X side) of the handle main body 231. The locking portion 26 includes a locking spring 261, a locking fitting 262, and a locking attachment portion 263.

[0047] The locking spring 261 is a general spring member formed in a substantially cylindrical shape that is elastically deformable in the discharge direction X. This locking spring 261 is disposed so that an end of the locking spring 261 on the discharge side (+X side) abuts against an end of the locking spring 261 on the supply side (-X side) of the handle main body 231. The locking spring 261 is formed in a ring shape larger than the shaft portion 241 of the piston rod 24 when viewed from the front in the discharge direction X, and the shaft portion 241 is inserted through the locking spring 261. The locking spring 261 is biased in a state in which the handle body 231 and the locking fitting 262 are separated from each other, that is, in a state in which the locking spring 261 is compressed in the discharge direction X.

[0048] The locking fitting 262 is a steel member formed in a plate shape extending in the vertical direction Z in a side view seen from the front-rear direction Y. This locking fitting 262 is formed with a locking insertion hole 2621, which is a circular insertion hole smaller than the locking spring 261 and larger than the shaft portion 241, in a front view seen from the discharge direction X. An end portion on the discharge side (+X side) of the locking insertion hole 2621 is disposed so as to abut against an end portion on the supply side (-X side) of the locking spring 261. The shaft portion 241 is inserted into the locking insertion hole 2621. A locking connection part 262b is formed at the end part on the upper side (+Z side) of the locking fitting 262. The locking connection part 262b is a part equipped with a shaft part similar to a pin connector, and is connected to a locking connection part 262a of a locking attachment part 263 described later so as to be rotatable in the discharge direction X.

[0049] The lock attachment portion 263 is formed so as to extend further toward the supply side (-X side) from the end portion on the upper side (+Z side) of the supply side (-X side) of the handle main body 231. The lock attachment portion 263 is formed integrally with the handle main body 231. A locking connection part 262a is formed in the center of the locking attachment part 263. The locking connection part 262a is, for example, a through hole provided so that a pin connector can be inserted therethrough, and is connected to the locking connection part 262b of the locking fitting 262 so as to be rotatable in the discharge direction X.

[0050] In the locking portion 26 constructed in this manner, when the locking fitting 262 is not rotated, the upper (+Z side) end of the locking fitting 262 is slightly inclined toward the discharge side (+X side) and abuts and locks with the shaft portion 241. On the other hand, when the locking fitting 262 is rotated, the locking fitting 262 becomes parallel to the vertical direction Z and does not abut with the shaft portion 241, and the lock is released.

[0051] The material and configuration of the locking portion 26 are not particularly limited as long as they can be locked with the shaft portion 241 of the piston rod 24 . For example, the locking spring 261 may be elastically deformable in the vertical direction Z or the front-rear direction Y. Furthermore, the locking portion 26 may be provided inside the handle main body 231. The caulking gun 2 may not include the locking portion 26.

[0052] <How the caulking gun works> The caulking gun 2 constructed in this manner discharges the sealing material 14 through the following operations.

[0053] First, the worker places the sealing 14 in the interior 22 c of the cylinder portion 22 . The worker pushes the locking fitting 262 toward the discharge side (+X side) (while releasing the lock of the piston rod 24) and retracts the pull-out portion 243 toward the supply side (-X side). Here, the space inside 22c of the cylinder portion 22 and on the discharge side (+X side) of the pressing portion 242 is provided to be large enough to accommodate the sealing material 14. Next, the worker disconnects the filter structure 1 from the cylinder portion 22, and places the sealing material 14 in the space inside 22c of the cylinder portion 22 and on the discharge side (+X side) of the pressing portion 242. After that, the worker reconnects the filter structure 1 to the cylinder portion 22.

[0054] The operation of disposing the sealing 14 in the interior 22c of the cylinder portion 22 is not particularly limited, and may be performed by the operation shown below. The worker moves the extraction part 243 to the discharge side (+X side) while pushing the locking metal fitting 262 toward the discharge side (+X side). Next, the worker removes the connection between the filter structure 1 and the cylinder portion 22, and abuts the end of the discharge side (+X side) of the cylinder portion 22 against the sealing material 14 so as to seal it. Then, the worker retracts the extraction part 243 toward the supply side (-X side) while pushing the locking metal fitting 262 toward the discharge side (+X side). As the extraction part 243 is retracted, the cylinder portion 22 sucks the sealing material 14 from the end of the discharge side (+X side) toward the interior 22c. When the retraction operation of the extraction part 243 is completed, the sealing 14 is disposed in the interior 22c of the cylinder portion 22. Thereafter, the worker reconnects the filter structure 1 and the cylinder portion 22.

[0055] Next, the worker dispenses the sealing material 14 onto the object to be treated. The operator rotates the rotating grip part 233 of the handle part 23 while the nozzle opening 211 of the nozzle part 21 is directed toward the target. Here, the pressing part 242 of the piston rod 24 advances toward the discharge side (+X side) while in contact with the sealing material 14. The sealing material 14 pressed by the pressing part 242 flows toward the discharge side (+X side), passes through the filter structure 1, and is then discharged from the nozzle opening 211 to the target. Therefore, the sealing material 14 flows through a flow path along the discharge direction X from the supply side (-X side) toward the discharge side (+X side). At this time, air bubbles generated inside the sealing material 14 are divided into sizes that can pass through the air bubble reduction holes 112 when passing through the filter structure 1.

[0056] The sealant 14 discharged onto the target hardens over time, and when completely hardened, it is fixed to the target. Because the air bubbles inside the sealant 14 are divided into shapes smaller than the air bubble reduction holes 112, they are unlikely to appear on the finished surface of the sealant 14, and even if they do appear, they do not cause significant unevenness. Therefore, the filter structure 1 can reduce the effects of the air bubbles inside the sealant 14.

[0057] As described above, in the filter structure 1 according to the present embodiment, the discharge portion 12 is a steel member formed in a circular shape larger than the nozzle portion 21 in a front view seen from the discharge direction X. A guide portion 121 having a substantially cylindrical shape facing the discharge direction X is formed in the middle of the discharge portion 12. The guide portion 121 is provided so that the sealing material 14 can flow through an inside 121c. An outlet port 122 is formed from an end of the discharge side (+X side) of the guide portion 121 to an end of the discharge side (+X side) of the nozzle connection portion 212b. An end of the supply side (-X side) of the outlet port 122 is provided so as to communicate with an inside 121c of the guide portion 121. The filter 11 is a member formed in a circular shape smaller than the guide portion 121 and larger than the discharge port 122 in a front view seen from the discharge direction X. A plurality of bubble reduction holes 112 are formed in the filter main body 110. The sealing material 14 flows through a flow path along the discharge direction X from the supply side (-X side) to the discharge side (+discharge side). At this time, air bubbles generated inside the sealing material 14 are divided into bubbles of a size that can pass through the air bubble reduction holes 112 as they pass through the filter structure 1. According to the filter structure 1 of the present embodiment, the influence of air bubbles generated inside the filler can be reduced. Therefore, the filter structure 1 of the present disclosure makes the finished surface of the filler uniform and smooth regardless of various conditions such as the skill level of the worker and the filler blending, thereby contributing to improvement of work efficiency and construction quality.

[0058] Although the embodiment of the filter structure 1 and the caulking gun 2 according to the present invention has been described above, the present invention is not limited to the above embodiment and can be modified as appropriate without departing from the spirit of the present invention. The components in the above embodiment of the present invention can be replaced with well-known components as appropriate, and the above-mentioned modified examples can be combined as appropriate.

[0059] For example, in the embodiment described above, the discharge port 122 is formed smaller than the guide portion 121 in a front view seen from the discharge direction X, and the filter 11 is disposed inside the guide portion 121 121c, but the present invention is not limited to this. The discharge port 122 may be formed larger than the guide portion 121, and the filter 11 may be disposed in the cylinder portion 22.

[0060] In the embodiment described above, the filter 11 is formed from a rigid plate-like member, and the filter 11 and the bubble reduction holes 112 are arranged to face each other in the discharge direction X, but the present invention is not limited to this. The filter 11 may be formed from a soft member, and may be arranged to be inclined in the front-rear direction Y or the vertical direction Z.

[0061] In the embodiment described above, the filter 11 comes into contact with the guide portion 121 due to the flow of the filler in the discharge direction X, but the present invention is not limited to this. The filter 11 may be formed integrally with the guide portion 121.

[0062] In the embodiment described above, the bubble reduction holes 112 are formed in a circular shape with a diameter of approximately 1 mm or less, but the present invention is not limited to this. The bubble reduction holes 112 may be formed in a diameter larger or smaller than approximately 1 mm, or in a polygonal shape.

[0063] In the above embodiment, the filler is the sealant 14, but the present invention is not limited to this. The filler may be a repair agent such as wood putty.

[0064] In the embodiment shown above, the caulking gun 2 includes the filter structure 1, the nozzle portion 21 connected to the discharge port 122 and formed in a shape narrowing toward the discharge side, the handle portion 23 formed in a grippable shape and having a rod insertion hole 2311 penetrating in the discharge direction X, the cylinder portion 22 formed in a cylindrical shape, one end of the discharge side connected to the guide portion 121 and the other end of the supply side connected to the handle portion 23, the piston rod 24 formed in a rod shape, one end of the discharge side disposed inside 22c of the cylinder portion 22, a part of which is inserted into the push-through insertion hole 2521 of the handle portion 23, and the filler disposed inside 22c of the cylinder portion 22 and on the discharge side of the piston rod 24, but the present invention is not limited thereto. The filter structure 1 may be provided in a construction device other than the caulking gun 2 (for example, a robot arm) or the like.

[0065] In the embodiment described above, the handle portion 23 has a pair of gripping portions rotatably provided in the discharge direction X, and the pushing spring 251 biased to separate the gripping portions from each other, and the piston rod 24 has a pressing portion 242 at one end on the discharge side that contacts the filler and is connected to the rotating gripping portion 233, but the present invention is not limited to this. The caulking gun 2 may be configured not to include a spring member, and to push the pressing portion 242 by hydraulic pressure, pneumatic pressure, or the like. EXAMPLES

[0066] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to the following examples.

[0067] <Verification test> A verification test was carried out using a test specimen to verify the bubble reduction effect of the filter structure and the caulking gun according to the embodiment. In the verification test, the test specimen was filled with a sealant and then compared in a completely cured state.

[0068] Comparative Example 1 has a configuration in which the filter is removed from the caulking gun described in the embodiment, and is a caulking gun used for general sealing work. Comparative Example 2 is a caulking gun having a configuration in which the filter is removed from the configuration of the caulking gun described in the embodiment, and in which a plurality of holes similar to the bubble reduction holes are formed in the nozzle opening. Example 1 is the caulking gun 2 described in the embodiment. In the verification test, the sealant used was a modified silicone filler mixed with a mixer under the same conditions. Also, in the verification test, test specimens under the same conditions were used.

[0069] Figure 5 shows the results of the number of air bubbles, total weight, and air ratio obtained from the verification test. The number of air bubbles is the result of cutting the center of the finished surface of the test specimen when the sealant is completely cured and measuring the number of air bubbles inside. The total weight is the weight of the test specimen when filled with sealant. The air ratio is the number of air bubbles per 1 kg of total weight. In Comparative Example 1, which is a caulking gun used for general sealing work, 11.9 air bubbles were generated per 1 kg of total weight.

[0070] As shown in Figure 5, Comparative Example 2, which is a caulking gun with multiple holes formed in the nozzle opening, generated 20.7 air bubbles per 1 kg of total weight. The air generation rate in Comparative Example 2 is higher than that in Comparative Example 1. It is considered that the air generation rate increased because the sealant is discharged in a divided state when multiple holes are provided in the nozzle opening, and air is entrained during discharge. Moreover, in Example 1, which is the caulking gun 2 described in the embodiment, 7.5 air particles were generated per 1 kg of total weight. The air generation rate in Example 1 is significantly lower than in Comparative Examples 1 and 2. It is considered that the air generation rate was reduced because the air generated inside the sealant 14 was divided into shapes smaller than the air bubble reduction holes 112 by passing through the filter 11. Also, in Example 1, it is considered that the sealant 14 is discharged in a lump state, so that less air is entrained during discharge. [Explanation of symbols]

[0071] 1. Filter Structure 2 Caulking gun 11 Filter (air bubble reduction part) 12 Discharge part 14 Sealing materials (fillers) 21 Nozzle section 22 Cylinder section 23 Handle 24 Piston rod 251 Push-in spring (spring part) 112 Air bubble reduction hole 121 Information Department 121c Interior (circulation space) 122 Discharge port 242 Pressing part 2311 Rod insertion hole (insertion hole) X Discharge direction

Claims

1. A filter structure arranged in a flow path of a filler along a discharge direction from a supply side to a discharge side, a discharge portion including a guide portion having a flow space through which the filler flows, and a discharge port formed on the discharge side of the guide portion and communicating with the flow space; a bubble reduction section disposed on the supply side of the discharge port and including a plurality of bubble reduction holes; at least a portion of the filler passes through the bubble reduction holes of the bubble reduction section and is then discharged from the discharge port of the discharge section toward the discharge side. Filter structure.

2. The discharge port is formed smaller than the guide portion when viewed from the front in the discharge direction, The bubble reduction section is disposed in the flow space of the guide section. The filter structure of claim 1 .

3. The bubble reduction section is formed from a rigid plate-like member, the bubble reduction section and the bubble reduction hole are disposed so as to face each other in the ejection direction. A filter structure according to claim 2.

4. The bubble reduction portion is fitted into the guide portion. A filter structure according to claim 3.

5. The bubble reduction holes are formed in a circular shape having a diameter of 1 mm or less. A filter structure according to claim 3.

6. The filler is a sealant. The filter structure of claim 1 .

7. A filter structure according to any one of claims 1 to 6, a nozzle portion connected to the discharge port and formed in a shape narrowing toward the discharge side; A handle portion formed in a grippable shape and having an insertion hole penetrating in the discharge direction; a cylinder portion formed in a cylindrical shape, one end of the discharge side being connected to the guide portion and the other end of the supply side being connected to the handle portion; a piston rod formed in a rod shape, one end of the discharge side being disposed inside the cylinder portion and a portion of the piston rod being inserted into the insertion hole of the handle portion; The filler is disposed inside the cylinder portion and on the discharge side of the piston rod. Caulking gun.

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