JP5610996B2 - Sheilagan - Google Patents

Description

  The present invention relates to a sealer gun that discharges a sealer such as a coating agent or a filler from a discharge port at the tip of a discharge cylinder, and is generated at a discharge port portion at the tip of the discharge cylinder when discharge of the sealer is stopped. The present invention relates to an improvement of a sealer gun equipped with a dripping prevention device that removes and eliminates the dripping of water.

  More specifically, a discharge cylinder formed with a small diameter nozzle on the distal end side is connected to the distal end portion of the body that is formed in a cylindrical shape and has a grip grip on the proximal end side, and inside the body, An introduction pipe that guides the sealer to the discharge cylinder and a valve mechanism that disconnects and contacts the introduction pipe and the discharge cylinder are provided. In the sealer gun, which is opened by grasping the lever and linked to close by restoring rotation by releasing the grasp, the piston is moved in and out of the casing by the turning operation of the grasping lever. A pump device that performs the pump operation of the discharge is attached, and the suction / discharge port of the pump device is positioned in the vicinity of the discharge port in the lumen of the discharge cylinder of the sealer gun, and the grip lever is released to discharge the sealer. Discharge when stopped Liquid sealer of discharge near the port and so allowed to disappear by sucking the scaling chamber of the pump device to an improvement of the Shiragan that allowed equipped with whom prevention device.

  As shown in FIG. 1, a sealer gun used for applying and filling a sealer made of a liquid material such as a coating agent / filler into a gap / gap of a structure body usually has a grip grip on the base end side. 1 is connected to a distal end portion of a body a formed in a barrel shape of a hollow cylinder 1 having a distal end side of a discharge cylinder 2 formed in a nozzle portion 20 having a small diameter. 3 is a valve mechanism 4 including a pipe line 30 that guides the sealer supplied from the pipe 3 to the discharge cylinder 2 at the tip, and a valve port 40 and a valve seat port 41 that disconnect and connect the pipe line 30 and the discharge cylinder 2. The valve mechanism 4 is opened by the operation of gripping the grip lever 5 together with the grip grip 1 with the valve mechanism 4 and the grip lever 5 pivotally supported on the body a in parallel with the grip grip 1 of the body a. The grip lever 5 is released when the grip lever 5 is released. When the gripping lever 5 is gripped together with the gripping grip 1 so that the valve mechanism 4 is closed by an operation of rotating by the restoring spring 50 and the valve mechanism 4 is closed, the valve mechanism 4 is opened to introduce the introduction pipe. When the sealer supplied from 3 is guided to the discharge cylinder 2 through the pipe line 30 and discharged from the discharge port 20a at the tip of the nozzle portion 20, and the grip lever 5 is released, the valve mechanism 4 is released. Is closed so that the discharge of the sealer is stopped.

  When the sealer gun A releases the sealer by releasing the grip lever 5, the sealer remaining in the container of the sealer gun A is introduced from the introduction pipe 3 downstream of the valve mechanism 4. Is pushed out from the discharge port 20a at the tip of the discharge cylinder 2.

  The sealer that is pushed out from the inside of the sealer gun A through the discharge port has a viscosity and has high adhesion and cohesion, so that the discharge port 20a at the tip of the nozzle portion 20 of the discharge cylinder 2 is used. Without leaving, it adheres to the periphery of the discharge port, hangs down in an icicle shape, and exhibits a phenomenon of dripping.

  When the discharge of the sealer is stopped by the operation of the valve mechanism 4, the dripping of the sealer that adheres to the periphery of the discharge port 20 a at the tip of the discharge cylinder 1 and hangs down is exposed to the outside air. Thus, the next time when the coating operation / filling operation is performed, the property is changed to a property that cannot be normally used. Therefore, immediately after the discharge of the sealer is stopped, The tip is wiped off and discarded. For this reason, the sealer gun A has to perform the work of wiping off the generated liquid every time the discharge of the sealer of the liquid material is stopped. There is a problem of causing the loss of the sealer by discarding the dripping.

  The liquid dripping prevention device B assembled and installed in the sealer gun A is for removing and disappearing liquid dripping that occurs every time the sealer gun A stops discharging the sealer.

  As shown in FIG. 2, a dripping prevention device B assembled and installed in the sealer gun A includes a casing 60 in which an inner space is formed in a cylinder shape in a body a constituting the main body of the sealer gun A, and the casing 60. From a piston 61 slidably fitted from the rear side, a suction block 62 attached to the front end side of the casing 60, and a suction / discharge pipe 64 connected to a suction / discharge port 63 provided in the suction block 62 The expansion / contraction chamber p formed between the rear wall surface of the suction block 62 and the front end surface of the piston 61 is expanded / reduced by an operation of moving the piston 61 into and out of the casing 60 of the piston 61, and the suction / discharge port 63. It is constructed and assembled so as to perform suction and discharge via When the pump device P is operated to perform suction / discharge operation by the forward / backward movement of the piston 61 so that the grip lever 5 is grasped and the sealer is discharged, the piston 61 is pushed in. When the grip lever 5 is released and the grip lever 5 is restored and rotated by the restoring spring 50, the piston 61 is pulled out to expand the internal volume of the expansion / contraction chamber p in the casing 60. The dripping prevention device B is configured by interlocking and linking the rotation of the grip lever 5 so as to perform the suction operation.

  In the interlocking device B of the sealer gun A shown in FIG. 2, this interlocking connection is achieved by continuously connecting the piston 61 of the pump device P to the tip of the valve shaft 42 of the valve mechanism 4. A bobbin-shaped locking member 51 a provided on the peripheral surface of the shaft that can be formed continuously with the rear end side of the valve shaft 42 by gripping the grip lever 5 and an angular shape on the upper end side of the grip lever 5. The valve shaft 42 is pushed to the left in the forward direction (FIG. 2) via a connecting mechanism 51 including an engaging protrusion 51b provided on the valve shaft 42, and the valve seat port 41 provided on the valve shaft 42 is connected to the valve port 40. When the valve mechanism 4 is moved to the opposite position and the valve mechanism 4 is opened, the piston 61 provided on the distal end side of the valve shaft 42 is pushed into the casing 60, as shown in (1) of FIG. The front surface of the suction block 62 of the casing 60 and the front end of the piston 61 The expansion / contraction chamber p formed by pressing and contracting is performed to discharge, releasing the grip lever 5 and releasing the grip lever 5 by the restoring spring 50 and simultaneously rotating the valve shaft 42 backward (right in FIG. 2). 3), when the valve seat 41 provided on the pull-back valve shaft 42 is moved to a position away from the valve port 40 and the valve mechanism 4 is closed, (2), (3), (4) in FIG. ), The piston 61 moves with the valve shaft 42 so as to be pulled out of the casing 60, and the expansion / contraction chamber p in the casing 60 is expanded to perform a suction operation. It is connected.

  The tip opening of the suction / discharge pipe 64 communicating with the expansion / contraction chamber p in the casing 60 of the pump device P faces the position near the discharge port 20a at the tip of the nozzle portion 20 inside the discharge cylinder 2 of the sealer gun A. Thus, when the grasping lever 5 is released and the sealer discharge is stopped, the pump device P performs the suction operation, and the tip of the nozzle portion 20 of the discharge cylinder 2 is stopped. The expansion and contraction chamber p inside the casing 60 of the pump device P that draws and expands the liquid of the sealer that adheres and hangs down from the discharge port 20a at the tip of the nozzle portion 20 of the discharge cylinder 2 into the discharge cylinder 2 is expanded. The air is sucked in and disappears from the periphery of the tip portion of the nozzle portion 20.

  In this way, the pump device P is mounted on the body a of the sealer gun A so that the expansion / contraction chamber p in the casing 60 expands / contracts by the rotation operation of the grip lever 5 provided in parallel with the grip 1 and performs discharge and suction operations. The anti-sagging device B is configured such that the tip opening of the suction / discharge pipe 64 faces the discharge port 20a at the tip of the discharge tube 2 in the lumen of the discharge tube 2 of the sealer gun A. The sealer gun A, equipped with the, disappears and removes the leaking of the sealer that adheres to the tip of the discharge cylinder 2 and hangs down when the gripper lever 5 is released and the discharge of the sealer is stopped. For this purpose, a suction / discharge pipe 64 connected to the suction / discharge port 63 of the pump device P to be assembled is arranged inside the discharge cylinder 2, and a sealer is guided to the suction / discharge pipe 64 via the discharge cylinder 2. Dress Since the discharge cylinder 2 is sucked into the expansion / contraction chamber p in the casing 60 of P, the discharge cylinder 2 is formed in a double tubular shape in which the suction / discharge pipe 64 of the pump device P is accommodated. The discharge cylinder 2 has a large inner diameter, whereby the discharge port 20a formed with a predetermined diameter at the tip of the discharge cylinder 2 has a reduced length in the axial direction. The sealer that discharges from the nozzle does not go straight, but the discharge direction changes randomly, which makes it difficult to apply and fill the sealer in a predetermined place, resulting in poor workability. It is tightening.

  As described above, the problem to be solved in the present invention is that the pump device P that performs the suction and discharge operations in conjunction with the rotation operation of the grip lever 5 is assembled to the body a, and the grip of the grip lever 5 is released. Then, when the discharge of the sealer is stopped, the liquid-like sealer that adheres to the tip of the discharge cylinder 2 and hangs down is sucked and disappeared by the suction operation of the assembled pump device P. When the sealer gun A configured as described above grasps the grip lever 5 to open the valve mechanism 4 and discharges the sealer from the discharge port 20a at the tip of the discharge cylinder 2, the coating operation and the filling operation are performed. The discharge is not straight, so the problem of poor workability is solved, and the discharge sealer is discharged straight from the discharge port 20a at the tip of the discharge cylinder 2 straight forward. Means to It lies in the fact that out.

  The problem that is worsening the workability caused by impairing the straightness of the sealer to be discharged to the sealer gun A assembled with the pump device P that eliminates and removes the dripping is the problem with the assembled pump device P. By arranging the suction / discharge pipe 64 in the discharge tube 2 in a double tubular shape, the discharge tube 2 has a large inner diameter, and the discharge port 20a formed at the tip of the discharge tube 2 has an axial core line thereof. By reducing the length in the direction, the function of regulating the discharge sealer in the axial direction of the discharge port 20a is impaired, and as a means for solving this, the discharge of the discharge cylinder 2 is prevented. A means for installing a guide pipe C having an inner diameter equal to the diameter of the discharge port 20a at the front end of the outlet 20a so as to extend the discharge port 20a is conceivable. However, in this way, the sealer discharged from the discharge port 20a goes straight and is discharged, but the pump device P when the release of the sealer is stopped by releasing the grip lever 5 is released. As a result, the suction action of the sealer is not sufficiently performed, and the sealer adheres to the periphery of the discharge port 20a of the discharge cylinder 2 in the form of a liquid dripping. For this reason, every time the discharge of the sealer is stopped, the sealer must be wiped from the periphery of the discharge port 20a of the discharge cylinder 2, which is the same as the sealer gun without the pump device P, and the workability of the application work Another problem arises that makes it worse.

  This is because the suction of the sealer by the pump device P is provided in the discharge cylinder 2 from the front end opening of the guide pipe C provided so as to extend the discharge port 20a forward, through the lumen of the guide pipe C. It is considered that the suction force of the pump device P is reduced by the resistance when the sealer flows through the guide pipe C by being sucked by the pipe 64.

  Therefore, the relationship between the extension length of the guide pipe C attached to the front surface of the discharge port 20a of the discharge cylinder 2 and the straightness given to the discharge sealer, and the extension length and the pump device P After examining the relationship with the suction performance of the sealer and repeatedly testing it, the straightness given to the discharging sealer is such that the guide pipe C has an extended length of 40 to 50 mm, so that the discharging sealer has straightness. It will be given enough. And when the extension length was shortened sequentially, if the extension length was up to about 10 mm, a result of giving straightness and discharging could be obtained. Further, in relation to the suction performance of the pump device P, when the extension length is 40 to 50 mm, the suction performance of the sealer by the pump device P is lowered, and when the discharge of the sealer is stopped, the discharge port at the tip of the discharge cylinder 2 The sealer remains attached around 20a. And when the extension length is shortened sequentially, when the length is about 10 mm, the suction performance of the pump device P when the discharge of the sealer is stopped is that the sealer around the discharge port 20a of the discharge cylinder 2 is discharged neatly. As a result, suction into the cylinder 2 was obtained.

  From the knowledge of this test result, the sealer that discharges from the discharge port 20a during the application of the sealer is installed on the front surface of the discharge port 20a of the discharge cylinder 2 with the guide pipe set to a discharge length of about 10 mm. This improves the workability by giving straightness to the sealer, and makes it possible to sufficiently perform the suction operation of the sealer by the pump device P when the discharge is stopped, thereby solving the problem.

Therefore, in the present invention, as means for solving the above-described problem, the piston (61 ) that slides in conjunction with the rotation of the grip lever (5) is applied to the body (a) of the sealer gun (A). ) by a pump device scaled chamber (p) performs the operation of the discharge and suction by scaling assembled (P), the suction on the scaling chamber suction and discharge ports (p) of the pump device (P) (63) The base end side of the discharge pipe (64) is connected , and the suction / discharge pipe (64) is connected to the axial center portion of the lumen of the discharge cylinder (2) provided on the distal end side of the body (a). The discharge cylinder (2) and the suction / discharge pipe (64) are inserted and arranged to form a double pipe, and the outer peripheral surface of the suction / discharge pipe (64) and the discharge cylinder (2) A sealer that has passed through a valve mechanism (4) that incorporates a gap between the inner peripheral surface and the body (a). Serial ejection tube (2) constitutes the flow path of sealer leading to the tip of the discharge port (20a) of the opening of the distal end side of the suction and discharge pipes (64), in the lumen of the discharge tube (2), When the sealer discharge is interrupted by the valve closing operation of the valve mechanism (4) , facing the position very close to the discharge port (20a) at the tip of the discharge cylinder (2), the sealer generated around the discharge port (20a) A dripping prevention device (B) for sucking the dripping into the expansion / contraction chamber (p) which is expanded by the retraction operation of the piston (61) interlocked with the restoring rotation of the lever through the suction / discharge pipe (64). configure and was allowed equipped Shiragan (a), said Shiragan of (a), in front of the tip of the discharge port of said discharge tube (2) (20a), aligned lumen diameter of the discharge opening (20a) The guide pipe (C) is so long that the protruding length is about 10 mm. Is intended to raise Shiragan, characterized in that the So設 to extend a constant to the discharge port (20a).

  According to the means of the present invention, when the grasping lever 5 is released and the discharge of the sealer is stopped, the liquid dripping that adheres to the periphery of the discharge port 20a at the tip of the discharge cylinder 2 and hangs down. When the assembled sealer is equipped with the anti-sagging device B that disappears by sucking into the expansion / contraction chamber of the pump device P by the operation of the assembled pump device P, when the discharge of the sealer is stopped It can be configured to give straightness to the sealer discharged from the discharge port 20a without deteriorating the suction performance of the liquid dripping by the pump device P, thereby improving the workability of the sealer gun.

It is the side view which carried out the longitudinal section of the conventional sheerragan. It is a vertical side view of a sealer gun assembled with a dripping prevention device as an improvement measure. FIG. 3A is a longitudinal side view of a portion on the tip side incorporating the anti-sagging device of the sealer gun, and FIG. 3A is a longitudinal side view when the discharge stroke of the pump device of the anti-sag device reaches the end; 3 (2) is a longitudinal side view when the suction stroke of the pump device is started, FIG. 3 (3) is a longitudinal side view when the suction stroke is advanced, and (4) of FIG. These are the vertical side views at the time of the state where the suction stroke reached the end. It is a vertical side view of the sealer gun which implemented the means of the present invention. It is a cross-sectional top view of the holding grip of a sealer gun same as the above. It is a perspective view of the reinforcement rib integrated in the inside of the holding grip of a sealer gun same as the above. It is explanatory drawing of an effect | action when the head of a shaft member pulls out from the suction and discharge port of a suction block.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 4 shows the release of the grip lever 5 of the sealer gun A embodying the present invention, and the grip lever 5 is rotated by the restoring spring 50 to the end of the rotation operation on the open rotation side. FIG. 5 is a sectional side view of the above-described sealer gun A, taken along line AA in FIG. 4 of the grip grip 1, and FIG. 6 is a perspective view of the central portion of the grip portion of the grip grip 1.

  In FIG. 4, A is the entire sealer gun, a is the body of the sealer gun A, 1 is the grip grip provided on the proximal end side of the body a, 2 is the discharge cylinder provided on the distal end side of the body a, and 3 is the sealer gun A An inlet pipe 30 is connected to supply a sealer to the pipe, and a pipe 30 provided inside the body a so as to guide the sealer supplied by the inlet pipe 3 to the discharge cylinder 2 provided on the distal end side of the body a. A valve mechanism 5 for controlling on / off of the supply of the sealer into the discharge cylinder 2 in the pipe line 30 is a grip lever that is pivotally supported by the body a so that the valve mechanism 4 can be opened and closed. , B is a sealer that is caused to adhere and hang down around the discharge port at the tip of the discharge cylinder 2 when the valve mechanism 4 is closed by the operation of the grip lever 5 to stop the discharge of the sealer. Body should be sucked to remove / disappear. Anti-drip device are assembled in a, C indicates the induction pipe mounted so as to extend forward in front of the discharge port 20a of the top end of the discharge tube 2.

  The body a is formed in a hollow cylindrical shape that is long in the front-rear direction (left-right direction in FIG. 4), and a shaft 7 that is long in the front-rear direction is housed therein so as to be movable in the front-rear direction.

  The shaft 7 is formed on the outer peripheral surface of a bobbin-like locking member 51a provided integrally or integrally on the peripheral surface on the rear end side, and on the inner peripheral surface of a ring-shaped guide protrusion 71 provided on the inner wall surface of the body a. It is guided by the outer peripheral surface of the shaft 7 that is in sliding contact, and freely slides back and forth within the body a. And it is urged | biased to move back by the restoring spring 50 wound around the outer periphery of the shaft 7 and stretched between the locking member 51a and the guide projection 71. It is held at the end position where it stops against the front end of the regulating member 8 provided at the rear end of the lumen of the body a.

  The grip lever 5 that is pivotally supported on the body a by the support shaft 5a is linked to the shaft 7 via a linkage mechanism 51 so as to be rotated. The linking mechanism 51 includes an engagement protrusion 51b provided in a square shape at a portion over the support shaft 5a, which is a rotation fulcrum of the grip lever 5, and a bobbin-like locking member 51a provided on the shaft 7. When the grip lever 5 is grasped together with the grip grip 1 and rotated counterclockwise in FIG. 4 about the support shaft 5a, the engaging projection 51b is rotated counterclockwise. When moving forward, the locking member 51a provided on the shaft 7 is pushed forward, the shaft 7 is pushed forward while the restoring spring 50 is compressed, and when the grip lever 5 is released, the restoring spring 50 The shaft 7 is moved to the right by the spring pressure, and the operation of the locking member 51a and the engaging protrusion 51b thereby causes the grip lever 5 to be restored and rotated to the open rotation position away from the grip grip 1. A.

  A valve shaft 42 of the valve mechanism 4 is integrally or integrally formed on the front end side of the shaft 7.

  The valve mechanism 4 includes a valve seat 41 provided on the peripheral surface of the valve shaft 42 provided on the front end side of the shaft 7 so as to be connected to and communicated with a pipe line 30a formed on the shaft core portion of the valve shaft 42, a valve port 40 opened on the inner wall surface of a and connected to a pipe line 30 formed inside the body a. The shaft 7 moves forward when the grip lever 5 is gripped, and is provided at the front end of the shaft 7. When the valve shaft 42 moves together, the valve seat port 41 provided in the valve shaft 42 is displaced forward and occupies a position opposite to the valve port 40 provided in the body a, thereby opening the valve state. The sealer guided by the pipe 30 on the body a side is guided into the discharge cylinder 2 through the pipe 30a in the valve shaft 42 and discharged from the discharge port 20a at the tip of the discharge cylinder 2, and the grip lever 5 is gripped. When released, the shaft 7 moves to the right by the restoring spring 50, so that the valve shaft 42 The provided valve seat 41 slides and displaces, deviates from the position facing the valve port 40, and enters the valve closing state in which the valve port 40 is closed by the peripheral surface of the valve shaft 42, and the discharge port 20 a of the discharge cylinder 2. The sealer is stopped from being discharged.

  On the front end side of the shaft 7, a piston 61 of the pump device P of the dripping prevention device B is further integrally installed in front of the valve mechanism 4.

  The dripping prevention device B is fitted on the distal end side of the body a with the rear half side of the casing 60 formed in a cylindrical shape, and the enlarged diameter portion 2 a on the proximal end side of the suction block 62 is provided on the front half side of the casing 60. The cylinder-shaped casing 60 is fitted to the front end side in the body a, and the piston 61 installed further forward of the valve shaft 42 provided at the front end of the shaft 7 is installed in the rear of the casing 60. A suction block 62 formed in a plug shape is fitted on the front end side of the casing 60, and the piston 61 is interposed between the rear wall surface of the suction block 62 and the front end surface of the piston 61. An expansion / contraction chamber p, which is a pump chamber that expands / contracts by reciprocation, is formed, and a suction / discharge port 63 that communicates with the expansion / contraction chamber p is opened at the axial center portion of the suction block 62. Pipe 64 By providing the pump device P, the expansion / contraction chamber p expands / contracts due to the forward / backward movement of the piston 61, and the suction / discharge pipe 64 of the pump device P is configured. The discharge cylinder 2 is inserted into the lumen of the discharge cylinder 2 provided on the distal end side of the body a so as to form a double pipe, and the opening at the front end of the suction / discharge pipe 64 is discharged. By disposing the sealer in the vicinity of the discharge port 20a opened at the tip of the cylinder 2, the liquid leakage of the sealer generated when the discharge of the sealer is stopped by closing the valve mechanism 4 is discharged to the discharge port 20a of the discharge cylinder 2. From this, a dripping prevention device B is constructed which is sucked into the expansion / contraction chamber p through the suction / discharge pipe 64 to be removed / disappeared.

  The guide pipe C attached so as to extend forward in front of the discharge port 20a at the tip of the discharge cylinder 2 is such that the sealer that discharges from the discharge port 20a goes straight along the axis of the discharge port 20a. This is to give straightness to the car. In the sealer gun A equipped with the dripping prevention device B as described above, the suction / discharge pipe 64 of the pump device P is placed in the lumen of the discharge cylinder 2 as in the illustrated embodiment. Since it is arranged so as to constitute a heavy pipe, the discharge cylinder 2 is formed so that the suction / discharge pipe 64 can be accommodated, so that the inner diameter of the discharge cylinder 2 is formed to a predetermined diameter. By making the diameter larger than the diameter, the discharge port 20a at the tip of the discharge cylinder 2 is formed in a very short form in the axial direction, and the discharge sealer is aligned with the axial center line of the discharge port 20a. Since it has little function of guiding in the direction, a guide pipe C is connected to the discharge port 20a so as to extend forward, and the sealer is discharged through the guide pipe C. So that this induction While going through the type C, it is the straightness are as given.

  This guide pipe C functions to give straightness to the sealer discharged from the discharge opening 20a at the tip opening. However, for the suction operation of the pump device P of the dripping prevention device B that sucks and eliminates dripping. The suction force of the liquid sealer to the expansion / contraction chamber p of the pump device P is reduced.

  For this reason, the extension length L of the guide pipe C is set to 10 mm in this embodiment. The set extension length L is a length that does not affect the suction operation of the sealer by the pump device P obtained by repeated tests, and is selected from a range that gives straightness to the discharging sealer. Is the length.

  Further, in this embodiment, the pump device P is fitted and fixed to the front end side of the cylindrical casing 60 with the suction block 62 provided with the suction / discharge port 63, and is slid from the other end side of the casing 60. The piston 61 is movably inserted, and the expansion / contraction chamber p formed between the front surface of the piston 61 and the rear surface of the suction block 62 is expanded and contracted by the reciprocation of the piston 61, and the suction block 62 is formed. The suction operation for sucking the fluid into the expansion / contraction chamber p through the suction / discharge port 63 and the discharge operation for discharging the fluid in the expansion / contraction chamber p from the suction / discharge port 63 are performed. When the chamber p is configured, the head at the front end of the shaft member 65 with a hook attached to the front end of the piston 61 is formed in a convex cone shape or umbrella shape whose peripheral wall is an inclined surface. Suck to fit The suction and discharge port 63 to be formed in the lock 62 has a configuration which is formed into a concave cone-shaped or umbrella-shaped.

  In this configuration, when the shaft 7 is retracted by the restoring spring 50, the piston 61 of the pump device P provided at the tip of the shaft is pulled out from the casing 60, and the expansion / contraction chamber p is expanded to perform the suction operation. When 61 starts to move rearward, it is shown in FIG. 7 between the peripheral surface of the head of the shaft member 65 having a convex cone shape or umbrella shape and the inner wall surface of the concave cone-shaped suction / discharge port 63 provided in the suction block 62. The suction / discharge port 63 and the expansion / contraction chamber p communicate with each other by the gap d generated as shown in the explanatory diagram of FIG. 6, and the suction of the sealer into the expansion / contraction chamber p is started immediately by the retraction operation of the piston 61. .

  As shown in FIGS. 2 and 3, the head of the shaft member 65 is shaped like a shaft, and the suction / discharge port 63 formed in the suction block 62 is closely connected to the shaft-like head of the shaft member 65. In the case where the shaft hole to be fitted is formed, a gap is formed between the peripheral surface of the shaft-shaped head of the shaft member 65 and the inner wall surface of the suction / discharge port 63 even if the piston 61 starts to move backward. The suction / discharge port 63 is in a closed state until the head of the shaft member 65 comes out of the suction / discharge port 63, and the suction to the expansion / contraction chamber p of the sealer through the suction / discharge port 63 is not performed. Not done. For this reason, the above-described configuration means in which the shaft member 65 is formed in a cone shape makes the suction performance of the liquid sealer that is generated when the discharge of the sealer stopped to be accurate.

  Further, in this embodiment, the pipe member 30a is extended by attaching the shaft member 65 with a flange to the front end of the piston 61 so as to communicate with the valve seat port 41 at the axial center portion of the valve shaft 42. As described above, when the base end side of the hooked shaft member 65 is fitted and fixed to the front end portion of the pipe line 30a formed in the axial core portion of the piston 61, the front end of the piston 61 is The base end side of the shaft member 65 with a hook is fitted into and fixed to the front end portion of the pipe line 30a. The base end side of the shaft member 65 is not press-fitted into the front end part of the pipe line 30a. Is formed to have the same diameter as or slightly smaller than the pipe line 30a, and is loosely inserted into the pipe line 30a, and is closely fitted and fixed by an adhesive. Thereby, when the base end side of the shaft member 65 is fitted and fixed to the pipe line 30a opened to the front end of the piston 61, the outer peripheral surface of the piston 61 is deformed by the diameter expansion deformation of the pipe line 30a, and the piston 61 prevents the operation of sliding in the casing 60 from causing a problem.

  Further, in the sealer gun A of this embodiment, the grip 1 thereof is provided with an elliptical rib 11 on the outer peripheral surface of the cylindrical inner cylinder 10 at the center thereof as shown in FIG. An outer cylinder formed by fitting the reinforcing rib 12 with the elliptical rib 11 in a state where the major axis is in the front-rear direction and forming the major axis in the front-rear direction as shown in FIG. By mounting the cover 13, it is formed into a flat shape with a narrow left and right width and a wide front and rear width.

A Sealer gun B Drip prevention device C Guide pipe L Extension length P Pump device a Body d Gap p Expansion / contraction chamber 1 Holding grip 10 Inner cylinder 11 Elliptical rib 12 Reinforcement rib 13 Outer cylinder 2 Discharge cylinder 2a Expanding section 20 Nozzle Part 20a Discharge port 3 Introduction pipe 30 Pipe line 30a Pipe line 4 Valve mechanism 40 Valve port 41 Valve seat port 42 Valve shaft 5 Grip lever 5a Support shaft 50 Restoring spring 51 Linking mechanism 51a Locking member 51b Engaging projection 60 Casing 61 Piston 62 Suction Block 63 Suction / Discharge Port 64 Suction / Discharge Pipe 65 Shaft Member 7 Shaft 71 Guide Protrusion 8 Regulating Member

Claims (1)

A pump that performs discharge and suction operations by expanding and contracting the expansion chamber (p) to the body (a) of the sealer gun (A) by a piston (61) that slides in conjunction with the rotation of the grip lever (5). device assembled (P), to connect the base end side of the suction and discharge pipes (64) to said scaling chamber suction and discharge ports (p) of the pump device (P) (63), the suction and discharge pipes ( 64) at the axial center portion of the lumen of the discharge cylinder (2) provided on the distal end side of the body (a), a double pipe is formed by the discharge cylinder (2) and the suction / discharge pipe (64). A valve mechanism (in which a gap between the outer peripheral surface of the suction / discharge pipe (64) and the inner peripheral surface of the discharge cylinder (2) is incorporated in the body (a) the sealer having passed through the 4) constitutes the flow path of sealer leading to the discharge port of the tip of the discharge tube (2) (20a), said The opening of the distal end side of the pull-discharge pipe (64), said discharge tube (2) of the lumen, the valve mechanism so as to face in close proximity to the position of the tip of the discharge port of the discharge tube (2) (20a) When the sealer discharge is interrupted by the valve closing operation of (4), the sealer liquid drip generated around the discharge port (20a) is linked via the suction / discharge pipe (64) to the piston interlocked with the restoring rotation of the lever. A dripping prevention device (B) that is sucked into the expansion / contraction chamber (p) that is expanded by the retreat operation of (61) is configured to be installed in the sealer gun (A) , and the discharge cylinder (2) of the sealer gun (A ) of the front of the tip of the discharge port (20a), the induction pipe having uniform lumen diameter of the discharge opening (20a) (C), the discharge projection length is set to a length which is about 10mm port ( 20a) is installed so as to extend. Down.

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