JP2022025636A - Adhesive ejection unit and disassembly method of adhesive ejection unit - Google Patents

Abstract

To provide an environmentally friendly adhesive ejection unit that enables an amount of waste to be reduced, and a disassembly method of the adhesive ejection unit.SOLUTION: An adhesive ejection unit ejecting an adhesive from the front is provided, comprising: a cartridge having a cylindrical body for storing an adhesive, an ejection nozzle which covers an opening in the front of the cylindrical body, and a piston which moves in the cylindrical body and extrudes the adhesive from the rear; and a gun having a storage portion for storing the cartridge, and a rod which pushes the piston forward. A length of a storage space of the storage portion in a front-rear direction is larger than a length of the cylindrical body in the front-rear direction, the storage portion has: a front end which supports the ejection nozzle from the front while the cartridge is located at a front end portion of the storage space; and a holding portion which holds the cylindrical body while the cartridge is located at a rear end portion of the storage space.SELECTED DRAWING: Figure 3

Description

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

Adhesives are used to secure reinforcing bars, bolts, etc. to concrete structures. Such an adhesive is housed in a cartridge, discharged using a dedicated gun, and supplied to the construction target. In this case, it is not preferable to make the cartridge disposable from the viewpoint of environmental load. In addition, if the cartridge is disposable, not only will it be necessary to dispose of a large amount of waste at the construction site, but it will also be necessary to remove the adhesive (contents) remaining in the cartridge, which will increase the burden on the user. There is a problem. Further, Patent Document 1 discloses an extrusion mechanism for a film pack that can reduce the amount of waste by using a disposable film pack that can be crushed to reduce the bulk.

Japanese Unexamined Patent Publication No. 2007-275891

Removing the contents of the cartridge requires disassembling the parts of the cartridge, which is not easy and after disassembly, the cartridge is still disposable. Further, in the extrusion mechanism of Patent Document 1, it is still necessary to dispose of the film pack as waste, and the reduction in the amount of waste is insufficient.

The present invention has been made for the purpose of solving the above-mentioned problems, and it is possible to easily disassemble the cartridge and remove the contents, and by reusing the cartridge, the amount of waste can be reduced, which is an environmental load. It is an object of the present invention to provide a consideration for an adhesive discharge unit and a method for disassembling the adhesive discharge unit.

The adhesive discharge unit according to one aspect of the present invention is an adhesive discharge unit that discharges an adhesive from the front, and is a cylinder that houses the adhesive, a discharge nozzle that covers an opening in front of the cylinder, and the cylinder. A cartridge having a piston that moves inside the body and pushes out the adhesive from the rear, an accommodating portion for accommodating the cartridge, and a gun having a rod for pushing the piston forward, are provided in front of and behind the accommodating space of the accommodating portion. The length in the direction is larger than the length in the front-rear direction of the cylinder, and the accommodating portion includes a front end support portion that supports the discharge nozzle from the front side in a state where the cartridge is arranged at the front end portion of the accommodating space. It has a holding portion for holding the cylinder in a state where the cartridge is arranged at the rear end portion of the accommodation space.

According to this configuration, the length of the accommodation space in the front-rear direction is larger than the length in the front-rear direction of the cylinder. Therefore, by arranging and holding the cylinder at the rear end of the accommodation space, a gap is provided in front of the cylinder. As a result, the piston and the discharge nozzle can be separated from the front of the cylinder by pushing out the piston and the discharge nozzle with the rod. The piston and the discharge nozzle are housed in a state of being overlapped with each other in the gap in front of the cylinder. Therefore, the piston and the discharge nozzle can be easily taken out. That is, according to this configuration, the cylinder, the piston and the discharge nozzle can be easily disassembled. As a result, the cylinder, piston, and discharge nozzle can be reused at the construction site, and the amount of waste generated at the construction site can be reduced.

In the above-mentioned adhesive discharge unit, the rear end portion of the tubular body is provided with a protrusion protruding outward in the radial direction, and the holding portion is opened on both sides in the circumferential direction and the protrusion is rotated by rotating the tubular body. It may be configured to have a locking piece for locking the.

According to this configuration, the protrusion can be held in the holding portion by rotating the cylinder. That is, the cartridge can be moved and rotated backward, and the piston and the discharge nozzle can be separated from the cylinder by the rod, which facilitates the separation step. Further, since the locking piece opens on both sides in the circumferential direction, the protrusion can be locked regardless of the direction in which the cartridge is rotated in the circumferential direction. Therefore, the decomposition step can be performed more easily.

In the above-mentioned adhesive discharge unit, a pair of protrusions arranged symmetrically with respect to the central axis are provided at the rear end portion of the cylinder, and the holding portions are each engaged with a pair of engaging portions for locking the protrusions. It may be configured to have a piece.

According to this configuration, the tubular body is locked to a pair of locking pieces of the holding portion by a pair of protrusions symmetrical about the central axis. As a result, the locking of the cylinder by the holding portion is stabilized around the central axis. As a result, even when the cylinder is made thinner, the force received by the cylinder from the holding portion is dispersed and the cylinder is less likely to be damaged.

In the above-mentioned adhesive discharge unit, the front end portion of the cylinder body is provided with a protrusion protruding outward in the radial direction, and the front end portion and the rear end portion of the cylinder body may have the same shape. good.

According to this configuration, since the front end portion and the rear end portion have the same shape, the tubular body can be inverted and attached to the gun. Therefore, when the cylinder is reused, the cartridge can be used even when the discharge nozzle is attached to any opening of the cylinder to form the cartridge. As a result, mistakes in assembling the cartridge during reuse are prevented and the assembling process is simplified.

In the above-mentioned adhesive discharge unit, the accommodating portion has a restricting portion arranged on the side portion of the front end portion of the accommodating space, and the restricting portion arranges the cartridge at the front end portion of the accommodating space. In this state, it may interfere with the protrusion to regulate the posture of the cartridge in the circumferential direction.

According to this configuration, the regulating unit regulates the posture of the cylinder in the circumferential direction by using the protrusion of the cylinder. That is, it is possible to determine the posture of the cylinder in the circumferential direction at the time of ejection. Therefore, when the cartridge is moved backward in the disassembling step performed after the adhesive is discharged, it is possible to suppress the cylinder from interfering with the holding portion, and the disassembling step can be smoothly performed.

The method for disassembling the adhesive ejection unit according to one aspect of the present invention is to move the piston of the cartridge forward with the rod of the gun in a state where the cartridge is arranged at the front end of the accommodation space of the gun, and eject the cartridge. It is a method of disassembling the adhesive discharge unit that discharges the adhesive forward from the nozzle. After the discharge of the adhesive in the cartridge is completed, the cartridge is moved to the rear end of the accommodation space and the gun is used. A gap is provided in front of the cartridge, and the rod pushes the piston and the discharge nozzle forward from the cylinder of the cartridge.

According to this configuration, the user can easily disassemble the cartridge by moving the cartridge after discharging to the rear and holding it, and then moving the rod forward. Further, since the piston and the discharge nozzle are housed in a state of being overlapped with each other in the gap in front of the cylinder, the piston and the discharge nozzle can be easily taken out.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide an adhesive discharge unit and a method for disassembling the adhesive discharge unit, which can reduce the amount of waste and consider the environmental load.

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

Hereinafter, a method of disassembling the adhesive discharge unit 1 and the adhesive discharge unit 1 according to the embodiment will be described with reference to the drawings.
In addition, in order to make the features easy to understand, each drawing may be shown by enlarging the featured portion for convenience, and the dimensional ratio of each component is not always the same as the actual one. Further, in the following description, the direction parallel to the central axis J of the cylinder 30 of the adhesive discharge unit 1 may be simply referred to as "axial direction".

In the following description, the discharge direction of the adhesive discharge unit 1 is referred to as the front, and the opposite direction is referred to as the rear. The front-back direction coincides with the axial direction. Further, each part will be described by defining the vertical direction of the adhesive discharge unit 1 based on the posture when the adhesive discharge unit 1 is used.

<Adhesive discharge unit>
FIG. 1 is an exploded perspective view of the adhesive discharge unit 1.
The adhesive discharge unit 1 discharges the adhesive from the front. The adhesive discharge unit 1 includes a cartridge 10 filled with an adhesive, and a gun 50 for operating the cartridge 10 to discharge the adhesive from the cartridge 10.

The cartridge 10 has a cylinder 30, a discharge nozzle 20 and a piston 40 attached to the cylinder 30, and a discharge tube 19 attached to the discharge nozzle 20. The cartridge 10 is mounted on the gun 50.
Hereinafter, the gun 50 and the cartridge 10 will be described in detail.

<Cancer>
The gun 50 has an accommodating portion 60 for accommodating the cartridge 10, a rod 51 for operating the piston 40 of the cartridge 10, and an operating unit 70 for operating the rod 51.

The accommodating portion 60 includes four rods 61 extending in parallel along the axial direction, a front plate (front end support portion) 62 fixed to the front ends of the four rods 61, and four rods 61. It has a rear plate 63, which is fixed to the rear end.

The accommodating portion 60 is provided with an accommodating space A that opens on the upper side. The accommodation space A is a space surrounded by four rods 61, a front plate 62, and a rear plate 63. The accommodation space A opens upward. The accommodation space A extends in the front-rear direction. The cartridge 10 is housed in the storage space A.

The length of the accommodation space A in the front-rear direction is larger 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 housed in the storage space A. In the following description, the state in which the cartridge 10 is arranged unevenly toward the front side of the accommodation space A is referred to as "a state in which the cartridge 10 is arranged in the front end portion A1 of the accommodation space A". At this time, the front end surface of the discharge nozzle 20 comes into contact with the front plate 62. On the other hand, the state in which the cartridge 10 is biasedly arranged toward the rear side of the accommodation space A is referred to as "a state in which the cartridge 10 is arranged in the rear end portion A2 of the accommodation space A". At this time, the rear end of the tubular body 30 is close to and faces the rear plate 63. The adhesive ejection step is performed in a state where the cartridge 10 is arranged at the front end portion A1 of the accommodation space A. Further, the disassembling step of the cartridge 10 is performed in a state where the cartridge 10 is arranged at the rear end portion A2 of the accommodation 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 cylinder 30 of the cartridge 10 accommodated in the accommodating portion 60 from below.

The front plate 62 has a front plate main body 62a along a plane orthogonal to the axial direction, and a pair of restricting pieces (regulatory portions) 62c extending rearward from the front plate main body 62a.

The front plate main body 62a is provided with a notch 62b extending downward from the upper end portion. The discharge nozzle 20 is inserted into the notch 62b with the cartridge 10 arranged at the front end A1 of the accommodation space A. The front plate main body 62a faces the front end surface of the discharge nozzle 20. With the cartridge 10 arranged at the front end portion A1 of the accommodation space A, the front plate 62 supports the discharge nozzle 20 from the front side in the front plate main body 62a.

The regulation piece 62c is connected to the lateral edge of the front plate body 62a. The pair of restricting pieces 62c are plate-shaped so as to face each other with the accommodation space A interposed therebetween. The restriction piece 62c is arranged on the side of the front end portion A1 of the accommodation space A. The pair of restricting pieces 62c are arranged symmetrically about the central axis J of the cylinder 30 accommodated in the accommodation space A. The pair of restricting pieces 62c extends along the outer peripheral surface of the tubular body 30 accommodated in the accommodation space A. As will be described later, the regulation piece 62c regulates the posture of the cartridge 10 in the circumferential direction.

The rear plate 63 has a rear plate main body 63a along a plane orthogonal to the axial direction, and a pair of locking pieces 63c extending forward from the rear plate main body 63a.

The rear plate main body 63a is provided with a through hole 63b penetrating in the plate thickness direction. The rod 51 is inserted into the through hole 63b. A holding plate 65 for holding the rod 51 so as to be movable in the front-rear direction is fixed around the through hole 63b of the rear plate main body 63a.

The pair of locking pieces 63c holds the tubular body 30 in a state where the cartridge 10 is arranged at the rear end portion A2 of the accommodation space A. That is, the pair of locking pieces 63c constitutes a holding portion 64 for holding the tubular body 30. Further, the accommodating portion 60 has a holding portion 64, and the holding portion 64 has a pair of locking pieces 63c.

The locking piece 63c is connected to the lateral edge of the rear plate body 63a. The pair of locking pieces 63c are arranged so as to sandwich the accommodation space A. The locking piece 63c is arranged on the side of the front end portion A1 of the accommodation space A. The pair of locking pieces 63c are arranged symmetrically about the central axis J of the cylinder 30 housed in the storage space A.

The locking piece 63c has a first piece 64a and a second piece 64b facing each other in the front-rear direction, and a connecting piece 64c connecting them. The first piece 64a and the second piece 64b are plate-shaped along a plane orthogonal to the axial direction. A certain gap is provided in the front-rear direction between the first piece 64a and the second piece 64b. The first piece 64a extends laterally from the rear plate main body 63a. The first piece 64a is arranged on the same plane as the rear plate main body 63a. The second piece 64b is located in front of the first piece 64a. The connection piece 64c is connected to the first piece 64a and the second piece 64b at the end with respect to the central axis J. Therefore, the locking piece 63c opens on both sides in the circumferential direction (upper and lower in the present embodiment).

The rod 51 extends along the front-rear direction. The rod 51 is arranged on the central axis J of the tubular body 30 accommodated in the accommodation space A. A pressing plate 52 is fixed to the front end of the rod 51. The pressing plate 52 has a plate shape along a plane orthogonal to the central axis J.

The rod 51 is held by the operation unit 70. The rod 51 is moved in the front-rear direction by the operation unit 70. As a result, the rod 51 passes through the accommodation space A. For example, a drive device is mounted on the operation unit 70, and the rod 51 is moved in the front-rear direction by the operation of the user.

<Cartridge>
The cartridge 10 moves and adheres to the cylinder 30 that houses the adhesive, the discharge nozzle 20 that covers the opening in front of the cylinder 30, and the discharge tube 19 that is attached to the tip of the discharge nozzle 20. It has a piston 40 that pushes out the agent from the rear.

The tubular body 30 extends in the front-rear direction about the central axis J. The tubular body 30 opens back and forth. A pair of protrusions 31 are provided on the front end portion 30a and the rear end portion 30b of the tubular body 30, respectively. The protrusion 31 is located on the outer peripheral surface of the tubular body 30 and projects outward in the radial direction. The pair of protrusions 31 of the front end portion 30a and the rear end portion 30b are arranged symmetrically with respect to the central axis J, respectively. The protrusion 31 of the front end portion 30a and the protrusion 31 of the rear end portion 30b coincide with each other in the circumferential direction.

The dimension of the protrusion 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 protrusion 31 located at the rear end portion 30b of the tubular body 30 is arranged between the first piece 64a and the second piece 64b by arranging and rotating the cartridge 10 at the rear end portion A2 of the accommodation space A. .. By arranging the protrusion 31 between the first piece 64a and the second piece 64b, the movement of the tubular body 30 in the front-rear direction is restricted. In the disassembling step described later, since a force toward the front is applied to the cylinder 30, the holding portion 64 holds the cylinder 30 so as to restrict the forward movement of the cylinder 30 at least. All you need is. That is, "holding the cylinder 30 in a state where the cartridge 10 is arranged in the rear end portion A2 of the accommodation space A" means that the cartridge 10 arranged in the rear end portion A2 of the accommodation space A is moved forward. Means to limit.

According to the adhesive discharge unit 1 of the present embodiment, the protrusion 31 can be held by the holding portion 64 by rotating the tubular body 30 in the circumferential direction at the rear end portion A2 of the accommodation space A. Further, as described above, since the locking piece 63c opens on both sides in the circumferential direction, the protrusion 31 is held by the locking piece 63c of the holding portion 64 regardless of which direction the cartridge 10 is rotated in the circumferential direction. Can be locked to.

In the present embodiment, the pair of protrusions 31 of the rear end portion 30b of the tubular body 30 are arranged symmetrically with respect to the central axis J. Further, the pair of protrusions 31 of the rear end portion 30b are locked to different locking pieces 63c. Therefore, the locking of the tubular body 30 by the holding portion 64 is stabilized around the central axis J. As a result, the holding of the cylinder 30 in the holding portion 64 is stable. In addition, even when the cylinder 30 is made thinner, the force received by the cylinder 30 from the holding portion 64 is dispersed, and the cylinder 30 is less likely to be damaged.

According to the present embodiment, the front end portion 30a and the rear end portion 30b of the tubular body 30 have the same shape. Therefore, the tubular body 30 can be flipped back and forth and attached to the gun 50. Therefore, when the cylinder 30 is reused, the cartridge 10 can be used even when the discharge nozzle 20 is attached to any opening of the cylinder 30 to form the cartridge 10. That is, the user does not have to worry about the orientation of the cylinder 30 in the process of assembling the cartridge 10. As a result, an assembly error in the assembly process of the cartridge 10 at the time of reuse is prevented, and the assembly process is simplified.

A pair of restricting pieces 62c are arranged on the side portion of the front end portion A1 of the accommodating space A of the cartridge 10. The pair of regulation pieces 62c are arranged so as to be arranged side by side. The circumferential position of the pair of restricting pieces 62c coincides with the circumferential position of the locking piece 63c, respectively. Therefore, when viewed from the front, the restricting piece 62c and the locking piece 63c overlap each other.

When the cartridge 10 is accommodated in the accommodation space A from above, the regulation piece 62c interferes with the cylinder 30 when the pair of protrusions 31 of the front end portion 30a of the cylinder 30 are arranged side by side. Therefore, the cartridge 10 is not accommodated in the accommodation space A unless the pair of protrusions 31 of the front end portion 30a of the tubular body 30 are arranged in a direction inclined to the left and right. That is, the regulation piece 62c of the present embodiment interferes with the protrusion 31 in a state where the cartridge 10 is arranged at the front end portion A1 of the accommodation space A, and regulates the posture of the cartridge 10 in the circumferential direction.

According to the present embodiment, the regulation piece 62c regulates the posture of the cylinder 30 in the circumferential direction by using the protrusion 31 of the front end portion 30a of the cylinder 30. That is, the posture of the cylinder 30 in the circumferential direction at the time of ejection is determined. In the disassembling step performed after the ejection step, the cartridge 10 is moved backward and then rotated to lock the protrusion 31 of the rear end portion 30b to the holding portion 64. Therefore, depending on the posture of the tubular body 30 in the circumferential direction, the protrusion 31 of the rear end portion 30b interferes with the holding portion 64, and the cartridge 10 cannot be sufficiently moved to the rear end portion A2 of the accommodation space A. .. According to the present embodiment, the posture of the cylinder 30 in the circumferential direction in the discharge process is predetermined, so that interference between the cylinder 30 and the holding portion 64 is suppressed when the cartridge 10 is moved backward in the disassembly process. And the disassembly process can be performed smoothly.

The discharge nozzle 20 is attached to the front opening of the cylinder 30. A discharge tube 19 is attached to the discharge nozzle 20. The discharge nozzle 20 discharges the adhesive in the cartridge 10 to the construction target via the discharge tube 19.

FIG. 2 is a partial cross-sectional view of the adhesive discharge unit 1 in the vicinity of the discharge nozzle 20 and the piston 40. In FIG. 2, the cartridge 10 is arranged at the front end portion A1 of the accommodation space A.

The discharge nozzle 20 includes 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 funnel-shaped portion 21 and a fitting portion 23. It has a reinforcing rib 24 for reinforcing the above.

The funnel-shaped portion 21 covers the front opening of the tubular 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 facing surface 21a and a front facing front surface 21b. The rear surface 21a has a tapered shape that narrows the inner diameter from the rear to the front. In the present embodiment, the taper angle of the rear surface 21a changes in two stages. The taper angle of the rear surface 21a gradually decreases toward 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 on the rear surface 21a of the funnel-shaped portion 21.

In a state where the piston 40 is moved until the piston 40 and the discharge nozzle 20 come into contact with each other, the adhesive is concentrated and accumulated behind the rear surface 21a between the discharge nozzle 20 and the piston 40. According to the present embodiment, as compared with the case where the rear surface 21a is a flat surface, the adhesive at the completion of the ejection process is collected in one place, so that the amount of the adhesive remaining can be reduced.

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

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

The step surface 22b is a surface facing forward. The stepped surface 22b extends radially outward from the front end of the tapered surface 22a. The stepped surface 22b is an annular surface when viewed from the front. The radial width of the stepped surface 22b is substantially 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 outside in the radial direction. The diameter of the holding surface 22c substantially coincides with the outer diameter of the discharge tube 19. The holding surface 22c is provided with two ridges 22d that project inward in the radial direction and extend along the circumferential direction. The protruding height of the ridge portion 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. As a result, the tapered surface 22a and the inner peripheral surface of the discharge tube 19 are connected without a step. According to the present embodiment, the adhesive in the cartridge 10 smoothly flows from the discharge port 22 of the discharge nozzle 20 to the discharge tube 19. Further, 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. Further, the convex portion 22d of the holding surface 22c elastically deforms the discharge tube 19 inward in the radial direction. As a result, the discharge tube 19 is suppressed from being detached from the discharge nozzle 20.

According to the present embodiment, the discharge tube 19 is connected by inserting it into the discharge port 22 of the discharge nozzle 20. When the rear end surface of the discharge tube 19 comes into contact with the stepped surface 22b, the cross-sectional area of the flow path of the adhesive can be made uniform at the boundary portion from the discharge nozzle 20 to the discharge tube 19. On the other hand, when the tip of the discharge nozzle 20 is inserted into the discharge tube 19, a step or the like is formed in the flow path, so that the discharge tube 19 is easily detached by the pressure of the adhesive. Therefore, when the tip of the discharge nozzle 20 is inserted inside the discharge tube 19, it is necessary to wind a hose band that suppresses the detachment of the discharge tube 19 around the outside of the discharge tube 19. That is, according to the present 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 has a cylindrical shape centered on the central axis J. The fitting portion 23 fits on the inner peripheral surface of the tubular 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 comes into contact with the front end edge of the tubular body 30. A plurality of (three in this embodiment) concave grooves 23b extending along the circumferential direction are provided on the outer peripheral surface of the fitting portion 23. By providing the concave groove 23b, the contact area between the outer peripheral surface of the fitting portion 23 and the inner peripheral surface of the tubular body 30 is limited. As a result, the discharge nozzle 20 can be easily detached from the cylinder 30 while sufficiently suppressing the adhesive from leaking from between the fitting portion 23 and the cylinder 30, and the disassembling step of the cartridge 10 can be performed. Can be easy.

The reinforcing rib 24 has a plurality of annular ribs extending in an annular shape along the circumferential direction, and a straight rib extending linearly along the radial direction. The annular rib and the straight rib 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 orthogonal 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 through the rear opening of the cylinder 30. The piston 40 includes a disk portion 41, a sliding portion 43 provided on the outer circumference of the disk portion 41, a stripping portion 42 provided on the front surface 41a facing the front of the disk portion 41, the disk portion 41, and the disk portion 41. It has a reinforcing rib 44 that reinforces the sliding portion 43.

The sliding portion 43 has a cylindrical shape centered on the central axis J. The sliding portion 43 fits on the inner peripheral surface of the tubular body 30. A plurality of (three in this embodiment) concave grooves 43b extending along the circumferential direction are provided on the outer peripheral surface of the sliding portion 43. By providing the concave groove 43b, the contact area between the outer peripheral surface of the sliding portion 43 and the inner peripheral surface of the tubular body 30 is limited. As a result, the piston 40 can be smoothly slid with respect to the inner peripheral surface of the cylinder 30 while sufficiently suppressing the adhesive from leaking from between the sliding portion 43 and the cylinder 30.

The stripping portion 42 has a rib shape that protrudes forward and extends along the circumferential direction. The strip 42 extends along the outer edge of the front surface 41a. Therefore, the stripping portion 42 is an annular shape centered on the central axis J when viewed from the axial direction. The scraping portion 42 inclines toward the outside in the radial direction toward the front. A flat surface orthogonal to the central axis J is provided at the tip of the scraping portion 42. The diameter of the outer edge of the tip of the scraping portion 42 is slightly larger than the inner diameter of the tubular body 30. Therefore, by inserting the piston 40 into the tubular body 30, the stripping portion 42 is elastically deformed inward in the radial direction and pressed against the inner peripheral surface of the tubular body 30. By moving the piston 40 forward, the scraping portion 42 scrapes off the adhesive adhering to the inner peripheral surface of the tubular body 30. According to the present embodiment, it is possible to prevent the adhesive from remaining on the inner side surface of the tubular body 30 after use, and the tubular body 30 can be easily reused.

The reinforcing rib 44 has a plurality of annular ribs extending in an annular shape along the circumferential direction, and a straight rib extending linearly along the radial direction. The annular rib and the straight rib are connected to each other. The reinforcing rib 44 is connected to the rear surface 41b of the disk portion 41 and the inner peripheral surface of the sliding portion 43. The reinforcing rib 44 reinforces the disk portion 41 and the sliding portion 43. The rear end of the reinforcing rib 44 is formed along a plane orthogonal to the central axis J. The pressing 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 discharge unit 1 will be described. Here, as a method of using the adhesive ejection unit 1, an adhesive filling step, a cartridge 10 mounting step, an adhesive ejection step, and a cartridge 10 disassembling step will be described. After disassembling the cartridge 10, each component of the cartridge 10 can be cleaned, and then the adhesive filling step can be performed again.

(Adhesive filling process)
In the cartridge 10 of the present embodiment, the adhesive can be synthesized, for example, by stirring a plurality of types of raw materials inside the cylinder 30. In this case, the adhesive is prepared by covering one opening of the cylinder 30 with the piston 40, stirring the opening on the piston 40 side downward, and covering the other opening with the discharge nozzle 20 after the stirring is completed. To.

Stirring of the adhesive is performed, for example, by inserting a rotatable stirrer around the central axis J inside the tubular body 30. At this time, by holding the protrusion 31 provided on the outer peripheral surface of the tubular body 30, it is possible to prevent the tubular body 30 from rotating with the stirrer.

(Cartridge mounting process)
FIG. 3 is a perspective view of the adhesive discharge unit 1 and shows a state in which the cartridge 10 is arranged at the front end portion A1 of the accommodation space A. Further, FIG. 4 is a schematic view showing a mounting process of the cartridge 10.

As shown in FIG. 3, the cartridge 10 is used in a state of being accommodated in the accommodation space A of the gun 50. In the mounting process of the cartridge 10, the cartridge 10 is inserted into the accommodation space A of the gun 50 from above, and the cartridge 10 is mounted on the gun 50.

A regulation piece 62c is arranged on the side of the front end portion A1 of the accommodation space A. Therefore, the cartridge 10 is accommodated in the front end portion A1 of the accommodation space A in a circumferential posture in which the protrusion 31 of the tubular body 30 does not interfere with the regulation piece 62c.

As shown in FIG. 3, on the outer peripheral surface of the tubular body 30, a mark M of the posture in the circumferential direction of the cartridge 10 when mounted on the gun 50 is provided. In the present embodiment, the mark M is an arrow-shaped print extending in the axial direction. By mounting the cartridge 10 on the gun 50 with the mark M on the upper side, the user can smoothly perform the work without worrying about the interference between the protrusion 31 and the regulation piece 62c.

(Discharge process)
FIG. 5 is a schematic view showing a discharge process of the adhesive discharge unit 1.
As shown in FIGS. 3 and 5, in the ejection process, the cartridge 10 is arranged at the front end portion A1 of the accommodation space A. Therefore, the front surface of the discharge nozzle 20 of the cartridge 10 comes into contact with the front plate 62 of the gun 50.

In the discharge process, the user operates the operation unit 70 of the gun 50 to move the rod 51 forward. As a result, the user moves the piston 40 of the cartridge 10 forward with the rod 51 of the gun 50, and discharges the 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.

In the ejection step, the ejection nozzle 20 of the cartridge 10 is supported from the front side by the front plate 62 of the gun 50. Therefore, even if the pressure of the adhesive B in the cartridge 10 increases due to the adhesive B being pushed out by the piston 40, the discharge nozzle 20 is difficult to separate from the cylinder 30.

(Cartridge disassembly process)
6 and 7 are schematic views showing the procedure of the disassembling step of the cartridge 10. Further, FIG. 8 is a perspective view of the adhesive discharge unit 1, showing a state in which the discharge nozzle 20 and the piston 40 are detached from the tubular body 30 in which the cartridge 10 is arranged at the rear end portion A2 of the accommodation space A.

The disassembling step of the cartridge 10 is performed after the completion of the discharging step. Therefore, the disassembling step of the cartridge 10 is performed after almost all of the adhesive B in the cartridge 10 is discharged. Since the rear surface 21a of the discharge nozzle 20 of the present embodiment is tapered, a small amount of the adhesive B remains between the discharge nozzle 20 and the piston 40.

As shown in FIG. 6, in the disassembling step of the cartridge 10, the user first moves the cartridge 10 backward, arranges it in the rear end portion A2 of the accommodation space A, and further rotates the cartridge 10. As a result, the user engages the protrusion 31 of the tubular body 30 with the locking piece 63c of the cartridge 10.

As shown in FIGS. 6 and 8, in a state where the cartridge 10 is arranged at the rear end portion A2 of the accommodation space A and the protrusion 31 is locked to the locking piece 63c, a gap G is provided in front of the cartridge 10. It will be provided. That is, in this procedure, the cartridge 10 is moved to the rear end portion A2 of the accommodation space A and held by the gun 50 to provide a gap G in front of the cartridge 10.

As shown in FIG. 7, the user then operates the operation unit 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 cylinder 30.

The extruded piston 40 and the discharge nozzle 20 are housed in a state of being overlapped with the gap G in front of the tubular body 30. The user removes the cylinder 30 from the gun 50 after taking out the piston 40 and the discharge nozzle 20 housed in the gap G. This completes the disassembly of the cartridge 10.

The dimension of the gap G in the front-rear direction is preferably larger than the total thickness of the piston 40 and the discharge nozzle 20 in the front-rear direction. As a result, the user can take out the piston 40 and the discharge nozzle 20 from the gap G in a state where the piston 40 and the discharge nozzle 20 are overlapped with each other.

Further, it is more preferable that the dimension of the gap G in the front-rear direction is equal to or larger 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 take out the piston 40 and the discharge nozzle 20. Therefore, the user can take out the piston 40 and the discharge nozzle 20 without touching the outer peripheral surfaces of the piston 40 and the discharge nozzle 20 and without getting his hands dirty. The thickness of the finger is assumed to be, for example, about 1.5 cm. That is, the dimension of the gap G in the front-rear direction is preferably equal to or more than the value obtained by adding 1.5 cm to the thickness of the piston 40 and the discharge nozzle 20 in the front-rear direction.

According to the present embodiment, the length of the accommodation space A of the gun 50 in the front-rear direction is larger than the length of the cylinder 30 in the front-rear direction. Therefore, by arranging and holding the tubular body 30 at the rear end portion A2 of the accommodation space A, a gap G is provided in front of the tubular body 30. As a result, the piston 40 and the discharge nozzle 20 can be separated from the cylinder 30 by pushing out the piston 40 and the discharge nozzle 20 by the rod 51. As a result, the cylinder 30, the piston 40, and the discharge nozzle 20 can be reused at the construction site, and the amount of waste generated at the construction site can be reduced.

Although the embodiments of the present invention have been described above, the configurations and combinations thereof in the embodiments are examples, and additions, omissions, substitutions, and other modifications of the configurations are made without departing from the spirit of the present invention. Is possible. Further, the present invention is not limited to the embodiments.

For example, in the above-described embodiment, the case where the holding portion has a locking piece and the protrusion of the cylinder is locked by the locking piece by rotating the cylinder has been described. However, the holding portion may have other configurations. For example, the holding portion may have a snap fit that locks the protrusions of the cylinder. In this case, the user can lock the protrusion by the holding portion by moving the cartridge backward.

1 ... Adhesive discharge unit, 10 ... Cartridge, 20 ... Discharge nozzle, 30 ... Cylinder, 31 ... Projection, 40 ... Piston, 50 ... Gun, 51 ... Rod, 60 ... Accommodation, 62 ... Front plate (front end support) ), 62c ... Restricted piece (regulated part), 63c ... Locking piece, 64 ... Holding part, A ... Accommodating space, B ... Adhesive, G ... Gap, J ... Central axis

Claims (6)

An adhesive discharge unit that discharges adhesive from the front.
A cartridge having a cylinder for accommodating the adhesive, a discharge nozzle covering the opening in front of the cylinder, and a piston for moving inside the cylinder to push out the adhesive from the rear.
It comprises an accommodating portion for accommodating the cartridge and a gun having a rod for pushing the piston forward.
The length of the accommodation space of the accommodation portion in the front-rear direction is larger than the length of the cylinder in the front-rear direction.
The accommodating part
A front end support portion that supports the discharge nozzle from the front side in a state where the cartridge is arranged at the front end portion of the accommodation space, and a front end support portion.
It has a holding portion for holding the cylinder in a state where the cartridge is arranged at the rear end portion of the accommodation space.
Adhesive discharge unit. The rear end of the cylinder is provided with a protrusion protruding outward in the radial direction.
The holding portion has a locking piece that opens on both sides in the circumferential direction and locks the protrusion by rotating the cylinder.
The adhesive discharge unit according to claim 1. A pair of protrusions arranged symmetrically about the central axis are provided at the rear end of the cylinder.
Each of the holding portions has a pair of locking pieces for locking the protrusions.
The adhesive discharge unit according to claim 1 or 2. The front end of the cylinder is provided with a protrusion protruding outward in the radial direction.
The front end portion and the rear end portion of the cylinder have the same shape.
The adhesive discharge unit according to claim 2 or 3. The accommodating portion has a restricting portion arranged on the side of the front end portion of the accommodating space.
The restricting portion regulates the posture of the cartridge in the circumferential direction by interfering with the protrusion in a state where the cartridge is arranged at the front end portion of the accommodating space.
The adhesive discharge unit according to claim 4. Disassembly of the adhesive discharge unit that moves the piston of the cartridge forward with the rod of the gun and discharges the adhesive forward from the discharge nozzle of the cartridge with the cartridge placed at the front end of the housing space of the gun. It ’s a method,
After the ejection of the adhesive in the cartridge is completed, the cartridge is moved to the rear end of the accommodation space and held by the gun to provide a gap in front of the cartridge.
With the rod, the piston and the discharge nozzle are pushed forward from the cylinder of the cartridge.
How to disassemble the adhesive discharge unit.

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