JPH08299874A - Coking gun - Google Patents

Abstract

PURPOSE: To simplify the mounting labor of a cartridge and to prevent the dripping of a sealant in the cartridge at a time of the release of the gripping of a grip lever. CONSTITUTION: The leading end of a rod is attached to a piston press plate 34 moved before and behind within a cartridge holder 24 having a sealant housing cartridge mounted thereon. A feed lever 38 and a catch lever 41 are loosely fitted to the rod and a main spring 37 is interposed between the feed lever 38 and the cartridge holder 24. A catch lever spring 40 is interposed between the feed lever 38 and the catch lever 41 and the lower end of the feed lever 38 is brought into contact with the front side of a grip 27 supported on a gum main body 26. The lower end of the catch lever 41 is brought into contact with the rear side of a grip lever and the front side of the upper end thereof is engaged by a stopper 26c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caulking gun in which a cartridge containing a caulking material is attached and a grip lever and a grip are gripped to pour the sealant in order to fill a gap formed in a building with the sealant.

[0002]

2. Description of the Related Art An example of a conventional caulking gun of this type is shown in FIG. 6 and described below. In this caulking gun, a cartridge holder 1 for accommodating a cartridge accommodating a sealant includes a front end plate 2 provided with an insertion recess for inserting a nozzle A1 of a cartridge A, and a rear end plate 3 with a half space. It is configured by connecting with a semicircular plate 1a curved in a circular shape.

The gun body 4 is integrally formed with the cartridge holder 1 by attaching a grip 5 on the lower side and fixing the front portion to the rear end plate 3 of the cartridge holder 1. Is rotatably supported by a pin 7.

At the center of the cartridge holder 1, a rod 8 having a rear end plate 3 and a gun body 4 slidable and having a rear end bent in a U shape is inserted, and a distal end thereof has a dish-like shape with a raised outer peripheral side. A piston pressing plate 9 is attached.

Then, between the rear end plate 3 and the gun body 4, the feed lever 10 whose lower end is connected to the grip lever 6 at a fulcrum 10a is provided with an insertion hole 10b slightly larger than the rod 8. The main spring 11 is provided between the feed lever 10 and the rear end plate 3 so that the main spring 11 is provided.

Further, an upper end of a catch lever 12 is pivotally supported on a support plate 4a extending to the upper rear end side of the gun body 4 and has a diameter slightly larger than that of a rod 8 bored in this. The insertion hole 12a is inserted through the rod 8, and the catch lever spring 1 is provided between the catch lever 12 and the gun body 4.
3 is installed.

Therefore, the catch lever 12 is tilted by the pressing force of the catch lever spring 13, and the insertion hole 12a is tilted to tighten the rod 8 up and down.
, But it is possible to slide it forward because the catch lever 12 approaches vertically, and if the catch lever 12 is pushed toward the gun body 4,
The tightening of the rod 8 by the insertion hole 12a is released.

Further, since the feed lever 10 is pushed by the main spring 11 and has a relationship close to the rod 8 at a right angle, the forward and backward movements of the rod 8 are not hindered, but the grip lever 6 and the grip 5 are separated from each other. If gripped together, the feed lever 10 moves as the upper end of the grip lever 6 advances.
Is tilted, the insertion hole 10a tightens the rod 8, and the rod 8 is advanced as the feed lever 10 is gripped more.

However, when the grip lever 6 is released, the rod 8 is prevented from retreating by the catch lever 12, and the insertion hole 10a of the feed lever 10 slides on the rod 8 so that the rod 8 retracts. There is no such thing.

This caulking gun has a catch lever 1
2 is pushed to the gun body 4 side to release the backward blocking of the rod 8, the rod 8 is pulled backward to move the piston pressing plate 9 to the rear end side of the cartridge holder 1, and the nozzle A1 of the cartridge A is moved to the front end plate. The cartridge A is accommodated in the cartridge holder 1 from the open portion of the upper half surface of the cartridge holder 1 so as to be inserted into the insertion recess of 2.

Next, after cutting off the tip of the nozzle A1 of the cartridge A, if the grip lever 6 is grasped, the piston pressing plate 9 moves forward as described above, so that it is located at the rear end of the cartridge A. Since the piston A2 is pushed forward and the sealant in the cartridge A is pushed out from the nozzle A1, the sealant can be filled in the gap of the building.

[0012]

In such a caulking gun, the shape of the piston pressing plate 9 for pressing the piston A2 of the cartridge A and pouring the sealant is as follows.
Since the peripheral edge on the piston A2 side is raised, it has a dish shape, so that the sectional shape of the piston A2 at the time of pressing does not change from that when it is not pressed.

Since the rod 8 having the piston pressing plate 9 attached thereto is prevented from retreating by the catch lever 12 when the grip lever 6 is released from the grip, the pressure in the cartridge A due to the pressing of the piston pressing plate 9 is suppressed. Remains,
Due to the fact that the shape of the piston A2 does not change, when the grip lever 6 is released from the grip, the nozzle A
There was a risk of dropping the sealant from 1.

Further, every time when the cartridge A is attached to or detached from the cartridge holder 1, the catch lever 12 must be pushed against the catch lever spring 13 until the rod 8 is pulled and the piston pressing plate 9 is placed behind the cartridge holder 1. There was trouble to move it to the edge.

The present invention solves the above-mentioned problems of the conventional caulking gun, eliminates the need to push the catch lever against the catch lever spring when mounting the cartridge, simplifies the number of mounting steps, and simplifies the grip lever. An object of the present invention is to provide a caulking gun capable of eliminating the dripping of the sealant in the cartridge when the grip of the cartridge is released.

[0016]

SUMMARY OF THE INVENTION The present invention relates to means for a caulking gun which achieves the above-mentioned object, which means that a piston pressing plate which moves back and forth in a cartridge holder in which a cartridge containing a sealant is mounted is provided at the rod tip. The feed lever and the catch lever are loosely fitted to this rod, the main spring is interposed between the feed lever and the cartridge holder, and the catch lever spring is provided between the feed lever and the catch lever. The lower end of the feed lever is brought into contact with the front side of the grip pivotally supported by the gun body, the lower end of the catch lever is brought into contact with the rear side of the grip lever, and the front side of the upper end is engaged by a stopper. It can be stopped, and further, the piston pressing In the center, it is desirable to form a raised ring so as to press the central portion of the piston in the cartridge.

[0017]

In the caulking gun of the present invention, since the shape of the piston pressing plate is formed as described above, when the piston is pressed, the portion close to the center of the piston is pressed and the piston is depressed toward the nozzle side. It becomes a state.

On the other hand, when the grip lever is released,
Since the rod is allowed to retreat only for a short period until the catch lever is pushed by the grip lever to the vertical state at the final timing of returning the grip lever from the tightened state of the rod, the rod is slightly moved by the feed lever. The piston pressing plate is retracted, and the inside of the cartridge is depressurized to prevent the sealant from dripping.

Further, since the raised ring is formed in the central portion of the piston pressing plate so as to press the central portion of the piston in the cartridge, the piston of the cartridge has a concave shape when pressed by the piston pressing plate. In order to return to the planar shape, the inside of the cartridge becomes negative pressure,
The sealant is sucked into the cartridge, so that it is possible to prevent the sealant from dripping from the nozzle.

When the grip lever is not gripped, the urging force of the main spring is transmitted to the grip lever via the feed lever, and the grip lever creates a gap between the catch lever and the rod. The tightening of the rod by the lever is released, so that the rod is free to move and the piston pressing plate can be retracted.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In this embodiment, a front end plate 21 having an insertion recess into which the nozzle A1 of the cartridge A is inserted and a rear end plate 22 having a center hole 22a are connected by a semi-circular arc plate 23. A cartridge holder 24 is formed which is half open.

Further, the cartridge holder 24 is attached to the gun body 26 having the grip 25 formed by press molding or the like.
The bearing portion 26b is formed on the contact surface 26a that contacts the rear end plate 23, and the grip lever 27 is attached to the pin 2
It is pivotally supported at 8.

On the other hand, a large diameter portion 29a is formed on the cartridge holder fixing plate 29, and subsequently a supporting portion 29b, a fixing portion 29c having the same outer diameter as the bearing hole 26b, and a male screw 29d are sequentially formed, and a resin is formed on the supporting portion 29a. After fitting the sliding plate 30 such as the above, the support portion 29b is inserted into the center hole 22a of the rear end plate 22.

Next, the fixing portion 29c is inserted into the bearing portion 26b, and the male screw 29d is screwed and fastened with the nut 31, whereby the bearing portion 26b is interposed between the bearing portion 29b and the nut 31.
The cartridge holder fixing plate 29 is attached to the gun body 26, and the cartridge holder 24 can be rotated with respect to the gun body 26.

The cartridge holder fixing plate 29,
An insertion hole 32 is formed in the gun body 26 on the extension of the center line, a rod 33 is penetrated through these holes, and a piston pressing plate 34 having a raised ring 34a formed between the outer peripheral edge and the central portion is attached to the rod 33. Is rotatably attached to the front end of the rod and a rod fixing plate 35 is attached to the rear end of the rod 33.

A main spring stopper 36 is loosely fitted on the nut 31 side of the rod 33.
6, a main spring 37 is interposed, and an insertion hole 38a having a diameter slightly larger than that of the rod 33 provided in the feed lever 38 is inserted.

A feed lever pin 27a is planted on the grip lever 27, and when the grip lever 27 is gripped together with the grip 25, the feed lever pin 2 is attached.
7a pushes the lower end of the feed lever 38 forward, tilts the feed lever 38 with respect to the rod 33, and the insertion hole 38a of the feed lever 38 tightens the rod 33.

A catch lever spring stopper 39 is loosely fitted to the rod 33 on the rear side of the feed lever 38, and a catch lever spring 40 weaker than the main spring 37 between the catch lever spring stopper 39 and the catch lever spring stopper 39.
The insertion hole 41a having a diameter slightly larger than that of the rod 33 provided in the catch lever 41 is inserted through the insertion hole 41a.

The catch lever 41 has a catch lever fulcrum pin 42 attached to the gun body 26 on the lower side of its back surface by the urging force of the catch lever spring 40.
Is supported as a fulcrum, and the lowermost end thereof is pushed rearward by the biasing force of the main spring 37 in contact with the rear edge of the grip lever 27 separated from the grip 25.

Therefore, the upper end of the catch lever 41 is rotated forward, but the upper end of the catch lever 41 hits a stopper 26c provided in the gun body 26 to be in a vertical state, so that the insertion hole 41a can tighten the rod 33. Since there is no rod 33, the rod 33 can freely slide back and forth.

Therefore, the grip lever 27 is attached to the grip 2
When gripped together with 5, the grip lever pin 27a pushes the lower end of the feed lever 38, tilts the feed lever 38 with respect to the rod 33, and inserts the through hole 3
8a shifts to a state in which the rod 33 is tightened, and in this state, the grip lever pin 27a further advances, so that the rod 33 is pushed forward.

When the grip lever 27 is gripped, the trailing edge of the grip lever 27 moves forward and retracts, so the urging force of the catch lever spring 40 against the catch lever 41 causes the catch lever 41 to move its upper end backward. As a result, the insertion hole 41a tries to tighten the rod 33.

However, in this case, the rod 33 is about to move forward, while the insertion hole 41a is not connected to the rod 3.
Since 3 is tightened, the frictional force causes the catch lever 41 to receive a force to stand up in the vertical direction. Therefore, the tightening force of the insertion hole 41a to the rod 33 is weakened, and the rod 33 moves forward. Will be allowed.

In the caulking gun of this embodiment, when the grip lever 27 is pushed by the main spring 37 and is separated from the grip 25 and the feed lever 38 and the catch lever 41 are vertical, the insertion holes 38a, 41 are formed.
Since a does not tighten the rod 33, the rod 33 can be pulled backward by the rod pull-out plate 35 to retract the rod 33, thereby returning the piston pressing plate 34 to the vicinity of the rear end of the cartridge holder 24. You can

Therefore, from the open state of the upper half of the cartridge holder 24, the front end plate 21 is provided with the nozzle A1 in which the tip is cut off so that the internal sealing can be poured out.
The cartridge A is housed in the cartridge holder 24 so that the cartridge A is inserted into the insertion recess.

Next, the grip lever 27 is moved to the grip 25.
When it is grasped together with it, since the rod 33 is advanced as described above, the piston pushing plate 34 pushes the piston A2 of the cartridge A, and the pushing force pours the sealant from the nozzle A1 toward the gap of the building. Can be issued.

However, when the grip lever 27 is released, the feed lever 38 is returned to the vertical state by the urging force of the main spring 37, and the insertion hole 38 is inserted into the rod 33.
Then, the feed lever 38 retracts on the rod 33.

At the same time, the lower end of the feed lever 38 pushes the feed lever pin 27a to rotate the feed lever pin 27a so as to return the grip lever 27 to the state separated from the grip 25.

Immediately before the grip lever 27 returns to its original position, the trailing edge of the grip lever 27 is the catch lever 4.
Since the lower end of 1 is pushed close to the rod 33 in a state orthogonal to the rod 33, and the fastening of the insertion hole 41a to the rod 33 is released, the rod 33 is slightly retracted.

Therefore, the state of FIG. 4 in which the piston A2 of the cartridge A is pushing out the sealant by grasping the grip lever 27 is changed to the state of FIG. 5 in which it is not pushing out, so that the pressure on the piston A2 becomes zero. Become.

Moreover, since the piston pressing plate 34 has a shape in which the intermediate portion between the outer periphery and the center is raised, when the piston A2 is pressed, the piston A2 is curved as shown in FIG. , If the piston A2 is no longer pressed,
As shown in FIG. 5, the cartridge A returns to a flat surface, the inside of the cartridge A is made a negative pressure, and the sealant is pulled back from the nozzle A1. Therefore, it is possible to prevent the sealant from dripping from the nozzle A1 when the grip lever 27 is released.

When the grip lever 27 is opened, the rod 33 is in a free state. Therefore, when the gun body 26 side is set to the lower side in FIG. 34 may come out of the cartridge A, and the cartridge A may fall out of the cartridge holder 24.

Therefore, in the present embodiment, the resin friction member 43 shown in FIG. 6 is arranged on the rear side of the catch lever spring stopper 39 by inserting the rod 33 therethrough.
The friction member 43 is formed by integrally forming a tubular portion 43a having a slit (inner diameter is slightly smaller than the outer diameter of the rod 33) and a collar portion 43b that abuts against the catch lever spring stopper 39. A catch lever spring 40 is arranged on the outer circumference of the cylindrical portion 43a.

Since the cylindrical portion 43b having the slit of the friction member 43 is always in contact with the outer periphery of the rod 33 with elasticity, even when the rod 33 is in a free state, the friction force causes frictional force on the rod 33. Does not move, the rod 33 does not move even when the caulking gun is tilted as described above, and therefore the cartridge A does not drop out of the cartridge holder 24. Further, when the rod 33 is moved forward by operating the grip lever 27, the frictional force of the friction member 43 is small, so that the rod 33 can move smoothly.

As described above, when the cartridge A is mounted in the cartridge holder 24, the nozzle A1 is cut off in advance or after the mounting so that the sealing can be poured out. Often, the sealant is poured in a direction inclined from the center.

Then, if the gap in the building is in a direction different from this, the orientation of the cartridge A must be corrected in the direction of the gap.
4 is rotatable by a cartridge holder fixing plate 29 attached to the bearing portion 26a with respect to the gun body 26, and the cartridge A can be arbitrarily rotated to change the direction of the nozzle A1 to match the direction of the gap.

[0047]

As described above, according to the present invention, when the grip lever is not grasped together with the grip, the rod can be pulled without pulling the catch lever against the spring as in the conventional case. The piston pressing plate can be retracted to the rear end of the cartridge holder, and the work of mounting the cartridge in the cartridge holder can be performed easily and quickly.

In addition, when the grip lever is released, the rod slightly retracts, and the deformation of the piston of the cartridge when the sealant is poured out returns to the flat surface, which causes the sealant in the cartridge to drip. It has an effect that can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a cartridge holder rotation attachment mechanism for the gun body.

FIG. 3 is a sectional view taken along line I-I of the above.

FIG. 4 is a sectional view showing a state where a piston pressing plate presses a piston of a cartridge.

FIG. 5 is a cross-sectional view of the piston pressing plate when it is retracted from above.

FIG. 6 is a sectional view of a friction member.

FIG. 7 is a sectional view of a conventional caulking gun.

[Explanation of symbols]

 A cartridge A1 nozzle A2 piston 24 cartridge holder 25 grip 26 gun body 27 grip lever 33 rod 34 piston pressing plate 34a raised ring 36 main spring stop 37 main spring 38 feed lever 38a insertion hole 39 catch lever spring stop 40 catch lever spring 41 catch Lever 41a Insertion hole 42 Catch lever fulcrum pin

Claims (2)

[Claims] 1. A piston pressing plate that moves back and forth in a cartridge holder for mounting a cartridge containing a sealant is attached to the tip of a rod, and a feed lever and a catch lever are loosely fitted to the rod, and the feed lever and the cartridge are attached. A main spring is interposed between the holder and a catch lever spring between the feed lever and the catch lever, and the lower end of the feed lever is brought into contact with the front side of the grip pivotally supported by the gun body. The caulking gun is characterized in that the lower end of the catch lever is brought into contact with the rear side of the grip lever, and the front side of the upper end can be locked by a stopper. 2. The cogging gun according to claim 1, wherein a raised ring is formed in the center of the piston pressing plate so as to press the center of the piston in the cartridge.