JP7492878B2 - Adhesive dispensing unit and method for disassembling adhesive dispensing unit - Google Patents

Description

The present invention relates to an adhesive dispensing unit and a method for disassembling an adhesive dispensing unit.

Adhesives are used to secure rebars, bolts, etc. to concrete structures. Such adhesives are stored in cartridges and dispensed using a dedicated gun to be supplied to the work target. In this case, disposable cartridges are undesirable in terms of environmental impact. In addition, disposable cartridges not only require the disposal of a large amount of waste at the work site, but also require the removal of the adhesive (contents) remaining in the cartridge, which increases the burden on the user. Patent Document 1 also discloses an extrusion mechanism for film packs that can reduce the amount of waste by using disposable film packs that can be crushed to reduce their volume.

JP 2007-275891 A

To remove the contents of the cartridge, the cartridge parts must be disassembled, which is not easy, and once disassembled, the cartridge is still disposable. Furthermore, with the ejection mechanism of Patent Document 1, the film pack still needs to be discarded as waste, and the reduction in the amount of waste is insufficient.

The present invention has been made to solve the above problems, and aims to provide an adhesive dispensing unit and a method for disassembling an adhesive dispensing unit that are environmentally friendly, make it easy to disassemble the cartridge and remove the contents, and reduce the amount of waste by reusing the cartridge.

an adhesive dispensing unit for dispensing adhesive from the front, the adhesive dispensing unit comprising: a cartridge having a cylinder for storing adhesive, an ejection nozzle covering the front opening of the cylinder, and a piston that moves within the cylinder to push the adhesive out from the rear; a storage section for storing the cartridge, and a gun having a rod that pushes the piston forward; a storage space of the storage section having a length in the front-to-rear direction greater than a length in the front-to-rear direction of the cylinder , the cartridge being movable in the front-to-rear direction between a state in which the cartridge is positioned at the front end of the storage space and a state in which the cartridge is positioned at the rear end of the storage space; the storage section having a front end support section that supports the ejection nozzle from the front side when the cartridge is positioned at the front end of the storage space, and a holding section that holds the cylinder when the cartridge is positioned at the rear end of the storage space; a protrusion that protrudes radially outward at the rear end of the cylinder, the holding section having a locking piece that opens on both circumferential sides and locks the protrusion by rotating the cylinder.

According to this configuration, the length of the storage space in the front-rear direction is greater than the length of the cylinder in the front-rear direction. Therefore, by placing and holding the cylinder at the rear end of the storage space, a gap is provided in front of the cylinder. This allows the piston and discharge nozzle to be removed from the front of the cylinder by pushing them out with the rod. The piston and discharge nozzle are stored in a stacked state in the gap in front of the cylinder. This allows the piston and discharge nozzle to be easily removed. In other words, according to this configuration, the cylinder, piston, and discharge nozzle can be easily disassembled. This makes it possible to reuse the cylinder, piston, and discharge nozzle at the construction site, thereby reducing the amount of waste generated at the construction site.

In the adhesive dispensing unit described above, the rear end of the cylinder may be provided with a protrusion that protrudes radially outward, and the holding portion may have a locking piece that opens on both sides in the circumferential direction and locks the protrusion by rotating the cylinder.

With this configuration, the projection can be held in the holding portion by rotating the cylindrical body. In other words, the cartridge can be moved backwards and rotated, and the piston and discharge nozzle can be detached from the cylindrical body by the rod, facilitating the separation process. In addition, because the locking pieces open on both circumferential sides, the projection can be locked regardless of the circumferential direction in which the cartridge is rotated. This makes the disassembly process even easier.

In the adhesive dispensing unit described above, the rear end of the cylinder may be provided with a pair of protrusions arranged symmetrically around the central axis, and the holding portion may have a pair of locking pieces that lock onto the protrusions.

With this configuration, the cylinder is locked to a pair of locking pieces of the holding part by a pair of protrusions that are symmetrical about the central axis. This ensures that the cylinder is locked by the holding part stably around the central axis. As a result, even if the cylinder is made thinner, the force that the cylinder receives from the holding part is dispersed, making it less likely that damage will occur to the cylinder.

In the adhesive dispensing unit described above, the front end of the cylinder may be provided with a protrusion that protrudes radially outward, and the front end and rear end of the cylinder may be configured to have the same shape.

With this configuration, since the front end and rear end have the same shape, the cylinder can be attached to the gun with the front and rear turned upside down. Therefore, when reusing the cylinder, the cartridge can be used regardless of which opening of the cylinder the discharge nozzle is attached to to form the cartridge. As a result, mistakes in assembling the cartridge when it is reused are prevented, and the assembly process is simplified.

In the adhesive dispensing unit described above, the storage section may have a regulating section disposed on the side of the front end of the storage space, and the regulating section may be configured to interfere with the protrusion and regulate the circumferential position of the cartridge when the cartridge is disposed at the front end of the storage space.

According to this configuration, the regulating portion uses the protrusions of the cylinder to regulate the circumferential position of the cylinder. In other words, the circumferential position of the cylinder during dispensing can be determined. This prevents the cylinder from interfering with the holding portion when the cartridge is moved backward during the disassembly process performed after dispensing the adhesive, allowing the disassembly process to be performed smoothly.

One embodiment of the present invention relates to a method of disassembling an adhesive dispensing unit, which involves placing a cartridge at the front end of a storage space of a gun, and using a rod of the gun to move a piston of the cartridge forward and discharge adhesive forward from the discharge nozzle of the cartridge, and after dispensing of the adhesive from the cartridge is completed, the cartridge is moved to the rear end of the storage space to provide a gap in front of the cartridge, and by rotating the cartridge in a circumferential direction, a protrusion provided on the cylindrical body of the cartridge and protruding radially outward is engaged with a locking piece provided on the gun and opening on both circumferential sides, thereby restricting the forward movement of the cylindrical body, and the rod pushes the piston and the discharge nozzle forward from the cylindrical body of the cartridge.

With this configuration, the user can easily disassemble the cartridge by moving the cartridge backwards after ejection and holding it there, then moving the rod forward. Furthermore, because the piston and ejection nozzle are stored in a stacked state in the gap at the front of the cylinder, the piston and ejection nozzle can be easily removed.

The present invention provides an adhesive dispensing unit and a method for disassembling an adhesive dispensing unit that can reduce the amount of waste and is environmentally friendly.

FIG. 1 is an exploded perspective view of an adhesive dispensing unit. FIG. 2 is a partial cross-sectional view of the adhesive dispensing unit. FIG. 3 is a perspective view of the adhesive dispensing unit. FIG. 4 is a schematic diagram showing the cartridge mounting process. FIG. 5 is a schematic diagram showing a discharging process of the adhesive discharging unit. FIG. 6 is a schematic diagram showing the procedure of the disassembly process of the cartridge. FIG. 7 is a schematic diagram showing the procedure of the disassembly process of the cartridge. FIG. 8 is a perspective view of the adhesive dispensing unit.

Hereinafter, an adhesive dispensing unit 1 according to one embodiment and a method for disassembling the adhesive dispensing unit 1 will be described with reference to the drawings.
In addition, in each drawing, characteristic parts may be shown enlarged for convenience in order to make the features easier to understand, and the dimensional ratios of each component may not be the same as the actual ones. In the following description, the direction parallel to the central axis J of the cylindrical body 30 of the adhesive dispensing unit 1 may be simply referred to as the "axial direction".

In the following explanation, the discharge direction of the adhesive dispensing unit 1 is called the forward direction, and the opposite direction is called the rearward direction. The forward and backward directions coincide with the axial direction. In addition, each part will be explained by defining the up and down directions of the adhesive dispensing unit 1 based on the position of the adhesive dispensing unit 1 when in use.

<Adhesive dispensing unit>
FIG. 1 is an exploded perspective view of an adhesive dispensing unit 1. FIG.
The adhesive dispensing unit 1 dispenses adhesive from the front. The adhesive dispensing unit 1 includes a cartridge 10 filled with adhesive, and a gun 50 that operates the cartridge 10 to dispense the adhesive from the cartridge 10.

The cartridge 10 has a cylindrical body 30, a discharge nozzle 20 and a piston 40 attached to the cylindrical body 30, and a discharge tube 19 attached to the discharge nozzle 20. The cartridge 10 is attached to a gun 50.
Gun 50 and cartridge 10 will now be described in detail.

<Cancer>
The gun 50 has a housing portion 60 that houses the cartridge 10 , a rod 51 that operates the piston 40 of the cartridge 10 , and an operating portion 70 that operates the rod 51 .

The storage section 60 has four rod bodies 61 extending parallel to one another along the axial direction, a front plate (front end support section) 62 fixed to the front ends of the four rod bodies 61, and a rear plate 63 fixed to the rear ends of the four rod bodies 61.

The storage section 60 is provided with a storage space A that opens to the top. The storage space A is a space surrounded by four rod bodies 61, a front plate 62, and a rear plate 63. The storage space A opens to the top. The storage space A extends in the front-to-rear direction. The cartridge 10 is stored in the storage space A.

The length of the storage space A in the front-rear direction is greater than the length of the cylinder 30 in the front-rear direction. Therefore, the cartridge 10 can move in the front-rear direction while being stored in the storage space A. In the following description, the state in which the cartridge 10 is arranged biased toward the front side of the storage space A is called "the state in which the cartridge 10 is arranged at the front end A1 of the storage space A". At this time, the front end face of the discharge nozzle 20 contacts the front plate 62. On the other hand, the state in which the cartridge 10 is arranged biased toward the rear side of the storage space A is called "the state in which the cartridge 10 is arranged at the rear end A2 of the storage space A". At this time, the rear end of the cylinder 30 faces the rear plate 63 in close proximity. The adhesive discharge process is performed with the cartridge 10 arranged at the front end A1 of the storage space A. Also, the disassembly process of the cartridge 10 is performed with the cartridge 10 arranged at the rear end A2 of the storage space A.

The four rods 61 are arranged in an arc shape that opens upward when viewed from the axial direction. The four rods 61 support the cylindrical body 30 of the cartridge 10 housed in the housing section 60 from below.

The front plate 62 has a front plate body 62a that is aligned along a plane perpendicular to the axial direction, and a pair of restricting pieces (restricting portions) 62c that extend rearward from the front plate body 62a.

The front plate body 62a is provided with a notch 62b extending downward from the upper end. With the cartridge 10 placed at the front end A1 of the storage space A, the discharge nozzle 20 is inserted into the notch 62b. The front plate body 62a faces the front end face of the discharge nozzle 20. With the cartridge 10 placed at the front end A1 of the storage space A, the front plate 62 supports the discharge nozzle 20 from the front side on the front plate body 62a.

The regulating pieces 62c are connected to the lateral edges of the front plate body 62a. The pair of regulating pieces 62c are plate-shaped and face each other across the storage space A. The regulating pieces 62c are arranged on the sides of the front end A1 of the storage space A. The pair of regulating pieces 62c are arranged symmetrically about the central axis J of the cylindrical body 30 housed in the storage space A. The pair of regulating pieces 62c extend along the outer circumferential surface of the cylindrical body 30 housed in the storage space A. As described below, the regulating pieces 62c regulate the circumferential position of the cartridge 10.

The rear plate 63 has a rear plate body 63a that is aligned along a plane perpendicular to the axial direction, and a pair of locking pieces 63c that extend forward from the rear plate body 63a.

The rear plate body 63a has a through hole 63b that penetrates in the plate thickness direction. The rod 51 is inserted into the through hole 63b. A holding plate 65 that holds the rod 51 so that it can move in the front-rear direction is fixed around the through hole 63b of the rear plate body 63a.

The pair of locking pieces 63c hold the cylindrical body 30 with the cartridge 10 positioned at the rear end A2 of the storage space A. That is, the pair of locking pieces 63c constitute a holding portion 64 that holds the cylindrical body 30. The storage portion 60 also has a holding portion 64, and the holding portion 64 has a pair of locking pieces 63c.

The locking pieces 63c are connected to the side edges of the rear plate main body 63a. The pair of locking pieces 63c are arranged on either side of the storage space A. The locking pieces 63c are arranged on the sides of the front end A1 of the storage space A. The pair of locking pieces 63c are arranged symmetrically with respect to the central axis J of the cylindrical body 30 accommodated in the storage space A.

The locking piece 63c has a first piece 64a and a second piece 64b that face each other in the front-rear direction, and a connecting piece 64c that connects them. The first piece 64a and the second piece 64b are plate-shaped along a plane perpendicular to the axial direction. A certain gap is provided between the first piece 64a and the second piece 64b in the front-rear direction. The first piece 64a extends laterally from the rear plate body 63a. The first piece 64a is disposed on the same plane as the rear plate body 63a. The second piece 64b is located forward of the first piece 64a. The connecting piece 64c is connected to the first piece 64a and the second piece 64b at its end relative to the central axis J. Therefore, the locking piece 63c opens on both sides in the circumferential direction (top and bottom in this embodiment).

The rod 51 extends in the front-rear direction. The rod 51 is disposed on the central axis J of the cylindrical body 30 housed in the housing space A. A pressure plate 52 is fixed to the front end of the rod 51. The pressure plate 52 is a plate-like shape that extends along a plane perpendicular to the central axis J.

The rod 51 is held by the operating unit 70. The rod 51 is moved in the front-rear direction by the operating unit 70. As a result, the rod 51 passes through the storage space A. The operating unit 70 is equipped with, for example, a drive device, and the rod 51 is moved in the front-rear direction by the user's operation.

<Cartridge>
The cartridge 10 has a cylindrical body 30 that contains adhesive, a discharge nozzle 20 that covers the front opening of the cylindrical body 30, a discharge tube 19 attached to the tip of the discharge nozzle 20, and a piston 40 that moves inside the cylindrical body 30 and pushes the adhesive out from the rear.

The cylindrical body 30 extends in the front-rear direction around the central axis J. The cylindrical body 30 is open at the front and rear. A pair of protrusions 31 is provided on each of the front end 30a and rear end 30b of the cylindrical body 30. The protrusions 31 are located on the outer circumferential surface of the cylindrical body 30 and protrude radially outward. The pair of protrusions 31 on the front end 30a and rear end 30b are each symmetrically arranged around the central axis J. The circumferential positions of the protrusions 31 on the front end 30a and the protrusions 31 on the rear end 30b are aligned with each other.

The dimension of the projection 31 in the front-rear direction is smaller than the gap between the first piece 64a and the second piece 64b of the locking piece 63c. The projection 31 located at the rear end 30b of the cylinder 30 is disposed between the first piece 64a and the second piece 64b by disposing the cartridge 10 at the rear end A2 of the storage space A and rotating it. By disposing the projection 31 between the first piece 64a and the second piece 64b, the movement of the cylinder 30 in the front-rear direction is restricted. In addition, since a force directed forward is applied to the cylinder 30 in the disassembly process described later, the holding portion 64 only needs to hold the cylinder 30 so as to restrict at least the forward movement of the cylinder 30. In other words, "holding the cylinder 30 with the cartridge 10 disposed at the rear end A2 of the storage space A" means restricting the forward movement of the cartridge 10 disposed at the rear end A2 of the storage space A.

According to the adhesive dispensing unit 1 of this embodiment, the projection 31 can be held by the holding portion 64 by rotating the cylinder 30 in the circumferential direction at the rear end A2 of the storage space A. Furthermore, as described above, the locking piece 63c opens on both sides in the circumferential direction, so that the projection 31 can be locked by the locking piece 63c of the holding portion 64 regardless of the circumferential direction in which the cartridge 10 is rotated.

In this embodiment, the pair of protrusions 31 on the rear end 30b of the cylindrical body 30 are arranged symmetrically around the central axis J. Furthermore, the pair of protrusions 31 on the rear end 30b are each engaged with a different locking piece 63c. Therefore, the engagement of the cylindrical body 30 by the holding part 64 is stable around the central axis J. As a result, the holding of the cylindrical body 30 by the holding part 64 is stable. In addition, even if the cylindrical body 30 is made thinner, the force that the cylindrical body 30 receives from the holding part 64 is dispersed, making it less likely that damage will occur to the cylindrical body 30.

According to this embodiment, the front end 30a and the rear end 30b of the cylindrical body 30 have the same shape. Therefore, the cylindrical body 30 can be attached to the gun 50 with the front and rear reversed. Therefore, when reusing the cylindrical body 30, the cartridge 10 can be used regardless of which opening of the cylindrical body 30 the discharge nozzle 20 is attached to to construct the cartridge 10. In other words, the user does not need to be concerned about the orientation of the cylindrical body 30 during the assembly process of the cartridge 10. As a result, assembly errors during the assembly process of the cartridge 10 when reused are prevented, and the assembly process is simplified.

A pair of regulating pieces 62c are arranged on the sides of the front end A1 of the storage space A of the cartridge 10. The pair of regulating pieces 62c are arranged side by side on the left and right. The circumferential positions of the pair of regulating pieces 62c each coincide with the circumferential positions of the locking pieces 63c. Therefore, when viewed from the front, the regulating pieces 62c and the locking pieces 63c overlap each other.

When the cartridge 10 is accommodated in the accommodation space A from above, if the pair of protrusions 31 on the front end 30a of the cylinder 30 are aligned left and right, the regulating piece 62c interferes with the cylinder 30. Therefore, the cartridge 10 will not be accommodated in the accommodation space A unless the pair of protrusions 31 on the front end 30a of the cylinder 30 are aligned in a direction inclined left and right. In other words, the regulating piece 62c in this embodiment interferes with the protrusions 31 when the cartridge 10 is placed at the front end A1 of the accommodation space A, thereby regulating the circumferential orientation of the cartridge 10.

According to this embodiment, the regulating piece 62c regulates the circumferential position of the cylinder 30 using the protrusion 31 on the front end 30a of the cylinder 30. That is, the circumferential position of the cylinder 30 during ejection is determined. In the disassembly process performed after the ejection process, the cartridge 10 is moved backward and then rotated to engage the protrusion 31 on the rear end 30b with the retaining portion 64. Therefore, depending on the circumferential position of the cylinder 30, the protrusion 31 on the rear end 30b may interfere with the retaining portion 64, making it impossible to move the cartridge 10 sufficiently to the rear end A2 of the storage space A. According to this embodiment, the circumferential position of the cylinder 30 during the ejection process is determined in advance, so that interference between the cylinder 30 and the retaining portion 64 can be suppressed when the cartridge 10 is moved backward during the disassembly process, and the disassembly process can be performed smoothly.

The discharge nozzle 20 is attached to the front opening of the cylindrical body 30. The discharge tube 19 is attached to the discharge nozzle 20. The discharge nozzle 20 discharges the adhesive in the cartridge 10 via the discharge tube 19 to the application target.

Figure 2 is a partial cross-sectional view of the adhesive dispensing unit 1 near the dispensing nozzle 20 and the piston 40. In Figure 2, the cartridge 10 is disposed at the front end A1 of the storage space A.

The discharge nozzle 20 has a funnel-shaped portion 21, a discharge port 22 connected to the center of the funnel-shaped portion 21, a fitting portion 23 provided on the outer periphery of the funnel-shaped portion 21, and a reinforcing rib 24 that reinforces the funnel-shaped portion 21 and the fitting portion 23.

The funnel-shaped portion 21 covers the front opening of the cylindrical body 30. The funnel-shaped portion 21 has a conical surface shape centered on the central axis J. The funnel-shaped portion 21 has a rear surface 21a facing rearward and a front surface 21b facing forward. The rear surface 21a has a tapered shape that narrows its inner diameter from the rear to the front. In this embodiment, the taper angle of the rear surface 21a changes in two stages. The taper angle of the rear surface 21a becomes smaller in stages as it approaches the rear.

A cylindrical discharge port 22 is connected to the center of the funnel-shaped portion 21. The rear surface 21a of the funnel-shaped portion 21 is connected to the inner peripheral surface of the discharge port 22. The discharge nozzle 20 smoothly guides the adhesive in the cartridge 10 to the discharge port 22 at the rear surface 21a of the funnel-shaped portion 21.

When the piston 40 is moved until it comes into contact with the discharge nozzle 20, the adhesive is concentrated and accumulated behind the rear surface 21a between the discharge nozzle 20 and the piston 40. According to this embodiment, the adhesive is collected in one place when the discharge process is completed, which reduces the amount of residual adhesive, compared to when the rear surface 21a is a flat surface.

The discharge tube 19 is attached to the discharge port 22. The discharge tube 19 is inserted into the inner peripheral surface of the discharge port 22 from the front. The inner peripheral surface of the discharge port 22 is provided with a tapered surface 22a, a stepped surface 22b, and a retaining surface 22c. The tapered surface 22a, the stepped surface 22b, and the retaining surface 22c are arranged in this order from the rear side to the front side. The discharge tube 19 is inserted into the retaining surface 22c.

The tapered surface 22a is tapered so that the inner diameter decreases toward the front. The tapered surface 22a smoothly connects to the rear surface 21a of the funnel-shaped portion 21.

The step surface 22b faces forward. The step surface 22b extends radially outward from the front end of the tapered surface 22a. The step surface 22b is an annular surface when viewed from the front. The radial width of the step surface 22b is approximately the same as or slightly larger than the thickness of the discharge tube 19.

The holding surface 22c extends linearly along the axial direction. The holding surface 22c surrounds the discharge tube 19 from the radially outer side. The diameter of the holding surface 22c is approximately the same as the outer diameter of the discharge tube 19. The holding surface 22c is provided with two ridges 22d that protrude radially inward and extend circumferentially. The protruding height of the ridges 22d is smaller than the thickness of the discharge tube 19.

By inserting the discharge tube 19 into the holding surface 22c, the rear end surface of the discharge tube 19 comes into contact with the stepped surface 22b. This allows the tapered surface 22a and the inner peripheral surface of the discharge tube 19 to be connected without any steps. According to this embodiment, the adhesive in the cartridge 10 flows smoothly from the discharge port 22 of the discharge nozzle 20 to the discharge tube 19. In addition, since it is difficult to apply a forward force to the discharge tube 19, it is possible to prevent the discharge tube 19 from coming off the discharge nozzle 20. Furthermore, the convex ridge portion 22d of the holding surface 22c elastically deforms the discharge tube 19 radially inward. This prevents the discharge tube 19 from coming off the discharge nozzle 20.

According to this embodiment, the discharge tube 19 is connected by being inserted into the discharge port 22 of the discharge nozzle 20. The rear end surface of the discharge tube 19 comes into contact with the step surface 22b, so that the flow path cross-sectional area of the adhesive can be made uniform at the boundary between the discharge nozzle 20 and the discharge tube 19. In contrast, when the tip of the discharge nozzle 20 is inserted into the inside of the discharge tube 19, a step or the like is formed in the flow path, so that the discharge tube 19 is easily detached due to the pressure of the adhesive. For this reason, when the tip of the discharge nozzle 20 is inserted into the inside of the discharge tube 19, it becomes necessary to wrap a hose band around the outside of the discharge tube 19 to prevent the discharge tube 19 from detaching. In other words, according to this embodiment, it is not necessary to use a hose band, and the number of parts of the cartridge 10 can be reduced.

The fitting portion 23 is cylindrical and centered on the central axis J. The fitting portion 23 fits into the inner peripheral surface of the cylindrical body 30. A flange portion 23a is provided at the front end of the outer peripheral surface of the fitting portion 23. The flange portion 23a contacts the front edge of the cylindrical body 30. The outer peripheral surface of the fitting portion 23 is provided with a plurality of (three in this embodiment) grooves 23b extending along the circumferential direction. The provision of the grooves 23b limits the contact area between the outer peripheral surface of the fitting portion 23 and the inner peripheral surface of the cylindrical body 30. This makes it possible to easily detach the discharge nozzle 20 from the cylindrical body 30 while sufficiently suppressing the adhesive from leaking out from between the fitting portion 23 and the cylindrical body 30, and facilitates the disassembly process of the cartridge 10.

The reinforcing rib 24 has a plurality of annular ribs extending in an annular shape along the circumferential direction and linear ribs extending linearly along the radial direction. The annular ribs and linear ribs are connected to each other. The reinforcing rib 24 is connected to the front surface 21b of the funnel-shaped portion 21 and the inner peripheral surface of the fitting portion 23. The reinforcing rib 24 reinforces the funnel-shaped portion 21 and the fitting portion 23. The front end of the reinforcing rib 24 is formed along a plane perpendicular to the central axis J. The discharge nozzle 20 contacts the front plate 62 at the front end of the reinforcing rib 24.

The piston 40 is inserted from the rear opening of the cylinder 30. The piston 40 has a disk portion 41, a sliding portion 43 provided on the outer periphery of the disk portion 41, a scraped portion 42 provided on the front surface 41a facing forward of the disk portion 41, and a reinforcing rib 44 that reinforces the disk portion 41 and the sliding portion 43.

The sliding part 43 is cylindrical and centered on the central axis J. The sliding part 43 fits onto the inner circumferential surface of the cylindrical body 30. The outer circumferential surface of the sliding part 43 is provided with a plurality of (three in this embodiment) grooves 43b extending along the circumferential direction. The provision of the grooves 43b limits the contact area between the outer circumferential surface of the sliding part 43 and the inner circumferential surface of the cylindrical body 30. This allows the piston 40 to slide smoothly against the inner circumferential surface of the cylindrical body 30 while sufficiently preventing adhesive from leaking out from between the sliding part 43 and the cylindrical body 30.

The scraped portion 42 is a rib-like portion that protrudes forward and extends along the circumferential direction. The scraped portion 42 extends along the outer edge of the front surface 41a. Therefore, the scraped portion 42 is annular with the central axis J as the center when viewed from the axial direction. The scraped portion 42 inclines radially outward as it moves forward. A flat surface perpendicular to the central axis J is provided at the tip of the scraped portion 42. The diameter of the outer edge of the tip of the scraped portion 42 is slightly larger than the inner diameter of the cylindrical body 30. Therefore, by inserting the piston 40 into the cylindrical body 30, the scraped portion 42 elastically deforms radially inward and is pressed against the inner peripheral surface of the cylindrical body 30. By moving the piston 40 forward, the scraped portion 42 scrapes off the adhesive adhering to the inner peripheral surface of the cylindrical body 30. According to this embodiment, it is possible to suppress the adhesive from remaining on the inner surface of the cylindrical body 30 after use, making it easier to reuse the cylindrical body 30.

The reinforcing rib 44 has a plurality of annular ribs extending in an annular shape along the circumferential direction and linear ribs extending linearly along the radial direction. The annular ribs and linear ribs are connected to each other. The reinforcing rib 44 is connected to the rear surface 41b of the disc portion 41 and the inner peripheral surface of the sliding portion 43. The reinforcing rib 44 reinforces the disc portion 41 and the sliding portion 43. The rear end of the reinforcing rib 44 is formed along a plane perpendicular to the central axis J. The pressure plate 52 of the rod 51 contacts the rear end of the reinforcing rib 44.

<How to use the adhesive discharge unit>
Next, a method of using the adhesive dispensing unit 1 will be described. Here, as a method of using the adhesive dispensing unit 1, a process of filling with adhesive, a process of mounting the cartridge 10, a process of dispensing adhesive, and a process of disassembling the cartridge 10 will be described. After disassembling the cartridge 10, each part of the cartridge 10 can be cleaned, and then the process of filling with adhesive can be performed again.

(Adhesive filling process)
In the cartridge 10 of this embodiment, the adhesive can be synthesized, for example, by stirring a plurality of types of raw materials inside the cylindrical body 30. In this case, one opening of the cylindrical body 30 is covered with the piston 40, stirring is performed with the opening on the piston 40 side facing downward, and after stirring is completed, the other opening is covered with the discharge nozzle 20, thereby preparing the adhesive.

The adhesive is stirred, for example, by inserting an agitator that can rotate around the central axis J into the inside of the cylindrical body 30. At this time, by holding the protrusions 31 provided on the outer circumferential surface of the cylindrical body 30, it is possible to prevent the cylindrical body 30 from rotating together with the agitator.

(Cartridge installation process)
Fig. 3 is a perspective view of the adhesive dispensing unit 1, showing a state in which the cartridge 10 is disposed at the front end A1 of the accommodation space A. Fig. 4 is a schematic view showing a process of mounting the cartridge 10.

As shown in FIG. 3, the cartridge 10 is used while housed in the housing space A of the gun 50. In the process of mounting the cartridge 10, the cartridge 10 is inserted from above into the housing space A of the gun 50 to mount the cartridge 10 on the gun 50.

A restricting piece 62c is disposed on the side of the front end A1 of the storage space A. Therefore, the cartridge 10 is stored in the front end A1 of the storage space A in a circumferential position in which the protrusion 31 of the cylindrical body 30 does not interfere with the restricting piece 62c.

As shown in FIG. 3, a mark M indicating the circumferential orientation of the cartridge 10 when attached to the gun 50 is provided on the outer circumferential surface of the cylindrical body 30. In this embodiment, the mark M is printed in the shape of an arrow extending in the axial direction. By attaching the cartridge 10 to the gun 50 with the mark M facing up, the user can perform the work smoothly without worrying about interference between the protrusion 31 and the regulating piece 62c.

(Discharge process)
FIG. 5 is a schematic diagram showing a discharging process of the adhesive discharging unit 1. As shown in FIG.
3 and 5, in the discharge process, the cartridge 10 is disposed at the front end A1 of the accommodation space A. Therefore, the front surface of the discharge nozzle 20 of the cartridge 10 contacts the front plate 62 of the gun 50.

In the discharge process, the user operates the operating part 70 of the gun 50 to move the rod 51 forward. This causes the user to move the piston 40 of the cartridge 10 forward with the rod 51 of the gun 50, discharging adhesive B forward from the discharge nozzle 20 of the cartridge 10. The discharge process is completed when the piston 40 comes into contact with the discharge nozzle 20.

During the discharge process, the discharge nozzle 20 of the cartridge 10 is supported from the front by the front plate 62 of the gun 50. Therefore, even if the pressure of the adhesive B inside the cartridge 10 increases as the adhesive B is pushed out by the piston 40, the discharge nozzle 20 is unlikely to come off the cylinder 30.

(Disassembly process of cartridge)
6 and 7 are schematic diagrams showing the steps of disassembling the cartridge 10. Also, Fig. 8 is a perspective view of the adhesive dispensing unit 1, showing a state in which the dispensing nozzle 20 and the piston 40 have been detached from the cylindrical body 30 in which the cartridge 10 is disposed at the rear end A2 of the accommodation space A.

The disassembly process of the cartridge 10 is carried out after the discharge process is completed. Therefore, the disassembly process of the cartridge 10 is carried out after almost all of the adhesive B in the cartridge 10 has been discharged. Note that, since the rear surface 21a of the discharge nozzle 20 in this embodiment is tapered, a small amount of adhesive B remains between the discharge nozzle 20 and the piston 40.

As shown in FIG. 6, in the process of disassembling the cartridge 10, the user first moves the cartridge 10 backward and places it at the rear end A2 of the storage space A, and then rotates the cartridge 10. This allows the user to engage the protrusion 31 of the cylindrical body 30 with the locking piece 63c of the cartridge 10.

As shown in Figures 6 and 8, when the cartridge 10 is placed at the rear end A2 of the storage space A and the protrusion 31 is engaged with the locking piece 63c, a gap G is provided in front of the cartridge 10. That is, in this procedure, the cartridge 10 is moved to the rear end A2 of the storage space A and held by the gun 50, thereby providing a gap G in front of the cartridge 10.

As shown in FIG. 7, the user then operates the operating portion 70 of the gun 50 to move the rod 51 forward. As a result, the user moves the piston 40 forward with the rod 51 of the gun 50, and pushes the piston 40 and the discharge nozzle 20 forward from the cylindrical body 30.

The pushed-out piston 40 and discharge nozzle 20 are housed in a stacked state in the gap G in front of the cylindrical body 30. After removing the piston 40 and discharge nozzle 20 housed in the gap G, the user detaches the cylindrical body 30 from the gun 50. This completes disassembly of the cartridge 10.

The dimension of the gap G in the front-to-rear direction is preferably greater than the sum of the thicknesses of the piston 40 and the discharge nozzle 20 in the front-to-rear direction. This allows the user to remove the piston 40 and the discharge nozzle 20 from the gap G while they are overlapped.

Moreover, it is more preferable that the dimension of the gap G in the front-rear direction is equal to or greater than the sum of the thickness of the piston 40 and the discharge nozzle 20 in the front-rear direction and the thickness of the finger. In this case, the user can insert a finger between the front end of the cylinder 30 and the rear end of the piston 40 to remove the piston 40 and the discharge nozzle 20. Therefore, the user can remove the piston 40 and the discharge nozzle 20 without touching the outer circumferential surfaces of the piston 40 and the discharge nozzle 20 and without getting his/her hands dirty. Note that the thickness of the finger is assumed to be, for example, about 1.5 cm. In other words, it is preferable that the dimension of the gap G in the front-rear direction is equal to or greater than the thickness of the piston 40 and the discharge nozzle 20 in the front-rear direction plus 1.5 cm.

According to this embodiment, the length of the storage space A of the gun 50 in the front-rear direction is greater than the length of the cylindrical body 30 in the front-rear direction. Therefore, by placing and holding the cylindrical body 30 at the rear end A2 of the storage space A, a gap G is provided in front of the cylindrical body 30. This allows the piston 40 and the discharge nozzle 20 to be detached from the cylindrical body 30 by pushing out the piston 40 and the discharge nozzle 20 with the rod 51. This makes it possible to reuse the cylindrical body 30, the piston 40, and the discharge nozzle 20 at the construction site, thereby reducing the amount of waste generated at the construction site.

Although the embodiments of the present invention have been described above, each configuration and their combinations in the embodiments are merely examples, and additions, omissions, substitutions and other modifications of configurations are possible without departing from the spirit of the present invention. Furthermore, the present invention is not limited to the embodiments.

For example, in the above embodiment, the holding portion has a locking piece, and the locking piece locks the protrusion of the cylinder by rotating the cylinder. However, the holding portion may have another configuration. For example, the holding portion may have a snap fit that locks the protrusion of the cylinder. In this case, the user can move the cartridge backward to lock the protrusion with the holding portion.

1...adhesive dispensing unit, 10...cartridge, 20...dispensing nozzle, 30...cylinder, 31...projection, 40...piston, 50...gun, 51...rod, 60...accommodation section, 62...front plate (front end support section), 62c...regulating piece (regulating section), 63c...locking piece, 64...holding section, A...accommodation space, B...adhesive, G...gap, J...central axis

Claims (3)

An adhesive dispensing unit that dispenses adhesive from the front,
a cartridge having a cylinder for storing an adhesive, a discharge nozzle covering an opening at the front of the cylinder, and a piston moving within the cylinder for pushing out the adhesive from the rear;
a gun having a housing portion for housing the cartridge and a rod for pushing the piston forward,
The length of the accommodation space of the accommodation portion in the front-rear direction is greater than the length of the cylindrical body in the front-rear direction,
the cartridge is movable in a front-rear direction between a state in which the cartridge is disposed at a front end of the storage space and a state in which the cartridge is disposed at a rear end of the storage space,
The storage section includes:
a front end support portion that supports the ejection nozzle from the front side in a state in which the cartridge is disposed at a front end portion of the accommodation space;
a holding portion that holds the cylindrical body in a state in which the cartridge is disposed at a rear end portion of the accommodation space ,
A protrusion protruding radially outward is provided at the rear end of the cylindrical body,
The holding portion has a locking piece that opens on both sides in the circumferential direction and locks the protrusion by rotating the cylindrical body.
Adhesive dispensing unit. A pair of the projections are provided on the rear end of the cylindrical body and are symmetrically disposed about a central axis line,
The adhesive dispensing unit according to claim 1 , wherein the holding portion has a pair of the locking pieces that lock the respective projections. A method for disassembling an adhesive dispensing unit, comprising the steps of: disposing a cartridge at a front end of an accommodation space of a gun; moving a piston of the cartridge forward with a rod of the gun to dispense adhesive forward from a discharge nozzle of the cartridge;
After the adhesive in the cartridge has been completely discharged, the cartridge is moved to a rear end of the accommodation space to provide a gap in front of the cartridge;
a protrusion provided on a cylindrical body of the cartridge and protruding outward in the radial direction is engaged with a locking piece provided on the gun and opening on both sides in the circumferential direction by rotating the cartridge in the circumferential direction, thereby restricting the forward movement of the cylindrical body;
The rod pushes the piston and the discharge nozzle forward from the cylindrical body of the cartridge.
How to disassemble the adhesive dispensing unit.

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