JP2015004264A - Caulking gun - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight, structural strength-strengthened and operationally smooth caulking gun.SOLUTION: The prevent invention provides a caulking gun including a grip unit 3 and a holder 4 provided by extending from the grip unit 3 so as to hold a cartridge 2, in which the grip unit 3 comprises a plastic body part 5, a trigger part pivoted to the body part 5 and a piston part 6 having a piston rod 61 slidably supported by the body part 5 and a pressing plate 62 provided on its one end, and the holder 4 comprises a fixing part 41 composed of a construction material different from the body part 5 and buried in the body part 5, a pair of extending walls 42 extending to the outside of the body part 5 parallel to the piston rod 6 from the fixing part 41 and an end wall 43 for connecting between those extending ends, and a cartridge storage space 44 is defined by the pair of extending walls 42 and the end wall 43.

Description

  The present invention relates to a caulking gun, and more particularly to a caulking gun that is lightweight and has a strong structure.

  As a caulking gun, those shown in Patent Document 1 and Patent Document 2 are generally used. These are the grip portion to be subjected to the gripping of the user, a holder portion caulking material such as silicone is connected to the grip portion to hold the cylindrical cartridge being filled, both in order to ensure the structural strength of metal It is configured. However, since the whole is made of metal, it is heavy and long-time use is hard for the user.

  Therefore, a caulking gun which is lightened by forming the grip portion and the holder portion with plastic as shown in FIGS. 1 and 2 is also used. The caulking gun 1 includes a main body 11, a holder 12 fitted and fixed to the front end of the main body 11, and a rod 131 that is slidably supported by the main body 11 by being inserted from the front end to the rear end of the main body 11. And a piston unit 13 having the same.

  The main body 11 is made of plastic, and includes a chamber portion 111 through which the rod 131 is passed, a locking member 112 provided at the front end of the chamber portion 111, and a pivot 131 mounted on the chamber portion 111. And a trigger 113 that can be moved toward the holder 12 side.

  The holder 12 is made of plastic and holds the cartridge 14. A locking groove 121 that can be fitted to the locking member 112 of the main body 11 and a rear end of the cartridge 14 are fixed to the rear end of the holder 12. A ring 122 is provided.

  A pressure plate 132 is provided at the tip of the rod 131 of the piston unit 13. When the rod 131 is pushed out to the holder 12 side by the trigger 113, the pressure plate 132 presses the contents of the cartridge 14.

  Since the main body 11 and the holder 12 are made of plastic as described above, the caulking gun 1 is lighter in weight than a metal one.

US Pat. No. 5,875,920 U.S. Pat. No. 4,081,112

  However, in the caulking gun 1 described above, the main body 11 and the holder 12 are simply connected by the fitting of the locking member 112 and the locking groove 121, and the trigger 113 is pulled in during use. When the rod 131 provided in the main body 11 is advanced in the direction in which the cartridge 14 held in the holder 12 is pressed, the locking member 112 and the locking groove 121 in the direction in which the stress pulls the main body 11 and the holder 12 apart. To be applied. Since the locking member 112 and the locking groove 121 are made of plastic, when a stress is applied, the locking member 112 and the locking groove 121 are slightly deformed in a direction away from each other, and as a result, the advance distance of the rod 131 is reduced. The pressure on the contents of the cartridge 14 is weakened, which hinders the operation of the caulking gun.

  The present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a caulking gun that is light in weight but has enhanced structural strength and smooth operation.

  In order to achieve the above object, the present invention provides the following means. That is, a caulking gun comprising a grip unit held by a user and a holder provided extending from the grip unit so as to hold a cartridge filled with a caulking material, the grip unit comprising: A body portion made of plastic, a trigger portion pivoted on the body portion, a piston rod slidably supported by the body portion, and a pressing plate provided at one end of the piston rod And the holder is made of a material different from that of the main body, and a fixed portion embedded in the main body, and the piston rod from the fixed portion, respectively. A pair of extending walls extending outside the main body so as to be parallel to each other and the extending ends of the pair of extending walls are connected to each other And a end wall, a cartridge accommodating space for accommodating the cartridge the pair of stretch wall and by said end wall to provide a caulking gun, characterized by being defined.

  According to the above means, since the fixing portion of the holder is embedded in the main body portion of the grip unit made of plastic, the coupling between the holder and the grip unit is strong. Therefore, even when pulling the trigger part and pushing out the contents of the cartridge, the holder and the grip unit do not move away from each other, and the force that the trigger part pushes the piston rod is not absorbed and the contents of the cartridge are left as they are. To be applied.

The exploded side view which shows the conventional caulking gun. The assembly side view which shows the conventional caulking gun. The top view which shows 1st Embodiment of the caulking gun which concerns on this invention. Sectional drawing along the IV-IV line in FIG. The side view which shows the usage condition of the said 1st Embodiment. The exploded side view which shows 2nd Embodiment of the caulking gun which concerns on this invention. The top view which shows the said 2nd Embodiment.

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

(First embodiment)
3, 4 and 5 show a first preferred embodiment of a caulking gun according to the present invention, of which FIG. 3 is a top view and FIG. 4 is a line IV-IV in FIG. FIG. 5 is a side view showing a use mode.

  The caulking gun according to the present invention is used in combination with a cartridge 2 filled with a caulking material, and includes a grip unit 3 held by a user and a cartridge housing space 44 for housing the cartridge 2 inside. The holder 4 extends from the grip unit 3 along the front-rear direction (that is, the left-right direction in FIGS. 3 and 4).

  The grip unit 3 is a piston having a body portion 5 made of plastic, a trigger portion 7 pivotally connected to the body portion 5, that is, hinged, and a piston rod 61 penetrating the body portion 5 in the front-rear direction. Part 6.

  The main body portion 5 includes a grip portion 51 in which the upper end side of the trigger portion 7 is pivoted and a chamber portion 52 in which a part of the piston rod 61 is accommodated.

The chamber portion 52 includes a front end portion 521 located on the side close to the holder 4, that is, the front side, and a rear end portion 522 located on the opposite side, that is, the rear side.
The grip part 51 is provided so as to extend downward between the front end part 521 and the rear end part 522 of the chamber part 52 in the vertical direction intersecting with the front-rear direction, and as shown in FIG. When the grip part 51 is gripped so that the user puts his / her finger on the trigger part 7, a thumb rest 511 for receiving the base part of the user's thumb and contacting the part from above is provided. Yes.

  The piston rod 61 of the piston portion 6 penetrates through the main body portion 5 as described above and is slidably supported by the main body portion 5, and is pressed against one end on the side located in the cartridge housing space 44. A plate 62 is provided.

  The trigger portion 7 is configured so that the lower end side of the trigger portion 7 can be driven rearward so that the upper end side can drive the piston rod 61 to protrude further toward the cartridge housing space 44. Note that a mechanism for moving the piston rod so as to protrude by pulling the trigger portion is well known, and a detailed description thereof will be omitted here.

  The holder 4 is made of a material different from that of the main body 5, and is embedded in the front end 521 of the main body 5, that is, the fixing portion 41 fixed to the main body 5 so as to be incorporated in the front end 521, A pair of elongated extending walls 42 and 42 extending from the fixed portion 41 to the outside of the main body 5 so as to be parallel to the piston rod 61 with the piston rod 61 interposed therebetween, and the pair of extensions A disk-like end wall 43 connecting the extended ends of the walls 42, 42, and the cartridge housing space 44 is surrounded by the pair of extended walls 42, 42 and the end wall 43. Is defined.

  In the present embodiment, as shown in FIG. 3, the fixing portion 41 is configured as a base wall in which a pair of extending walls 42, 42 extend from both ends thereof. The holder 4 as a whole is formed into an annular shape as viewed from above by a pair of extending walls 42, 42 extending in parallel from each other at a predetermined interval, and an end wall 43 connecting the extending ends of the extending walls 42, 42. Is made.

  In the present embodiment, the holder 4 is entirely made of metal, and not only the fixed portion 41 but also a part of the extending walls 42 and 42 close to the fixed portion 41 are embedded in the front end portion 521 of the main body portion 5. Yes. In the present embodiment, when the main body portion 5 is formed by injection molding using a plastic material, the fixed portion 41 made of metal and a part of the extending wall 42 on the side close to the fixed portion 41 are injected into the plastic material. The above-mentioned embedding was achieved by injection molding integrally so as to be incorporated.

  In the present embodiment, the metal is used as the material of the holder 4 in order to ensure the strength as described above. However, a high-strength material other than metal, such as glass fiber reinforced plastic, may be used for further weight reduction.

  In the present embodiment, the main body 5 is further provided with a cartridge fixing member 53 protruding from the front end 521 of the chamber 52 toward the cartridge housing space 44 as shown in FIG. .

  The cartridge fixing member 53 includes a pair of fixing walls 531, 531 extending symmetrically with respect to the piston rod 61 and extending parallel to the extending wall 42 of the holder 4. And reinforcing ribs 532 connecting the pair of fixed walls 531 and 531 to each other.

  In use, the piston rod 61 and the pressing plate 62 are pulled toward the rear end 522 of the main body 5, and then the cartridge 2 having a nozzle at the front end and filled with the caulking material is used, and the rear end is used as the cartridge fixing member 53. The fitting is inserted into the cartridge housing space 44 so that the leading end side comes into contact with the end wall 43 of the holder 4. Thereafter, when the user grips the grip 51 and the trigger portion 7 so that the base of the thumb contacts the thumb rest 511 and then pulls the trigger portion 7, the piston rod 61 and the pressing plate 62 protrude into the cartridge housing space 44. The pressing plate 62 presses the contents of the cartridge 2.

With the above configuration, according to the present invention, the following effects can be obtained.
When the contents of the cartridge 2 are pushed out, the end wall 43 supporting the tip of the cartridge 2 is pushed by the cartridge 2 due to the stress of the contents, and a force in a direction away from the main body 5 is applied to the entire holder 4. Since the fixing part 41 of the holder 4 is embedded in the main body part 5, the connecting part of the holder 4 and the main body part 5 is not deformed in the direction away from each other as in the conventional caulking gun, and the trigger part The force that 7 projects the piston rod 61 is applied to the contents of the cartridge 2 as it is without being absorbed. That is, the caulking gun according to the present invention is light in weight but has a high coupling strength between the main body 5 and the holder 4 and is more stable in operation.

  Further, since the cartridge fixing member 53 is provided, when the cartridge 2 is inserted into the cartridge housing space 44, the rear end portion of the cartridge 2 is fitted inside the fixing wall 531 of the cartridge fixing member 53, and the cartridge 2 is operated during operation. It can prevent wobbling due to the pressure.

  Further, since the thumb rest 511 is provided on the grip 51, if the grip 51 is gripped so that the thumb rests on the thumb rest 511, the trigger part 7 can be easily pulled, and the trigger part 7 is repeatedly pulled. Even if it goes, the user is not tired.

(Second Embodiment)
6 and 7 show a second preferred embodiment of a caulking gun according to the present invention, in which FIG. 6 is a side view showing an exploded state, and FIG. 7 is a top view showing an assembled state. It is.

  The second embodiment is similar to the first embodiment described above, but the connection mode between the main body 5 and the holder 4 is different. In the first embodiment, the fixing portion 41 of the holder 4 is a chamber portion. In the second embodiment, it is embedded from the front end portion 531 to the rear end portion 521 of the chamber portion 52, that is, in the entire chamber portion 52. Thereby, connection with the holder 4 and the main-body part 5 becomes firmer.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to this, It cannot be overemphasized that it can change variously in the range which does not deviate from the summary.

  The caulking gun according to the present invention is useful as a caulking gun that is light in weight but has a high bonding strength between the main body and the holder and is more stable in operation.

DESCRIPTION OF SYMBOLS 2 Cartridge 3 Grip unit 4 Holder 41 Fixing part 42 Extension wall 43 End wall 44 Cartridge accommodation space 5 Main part 51 Grip part 511 Thumb rest 52 Chamber part 521 Front end part 522 Rear end part 53 Cartridge fixing member 531 Fixing wall 532 Reinforcement rib 6 Piston Part 61 Piston rod 62 Press plate 7 Trigger part

Claims (10)

A caulking gun comprising a grip unit gripped by a user and a holder provided extending from the grip unit to hold a cartridge filled with a caulking material,
The grip unit is provided at a body portion made of plastic, a trigger portion pivoted on the body portion, a piston rod slidably supported on the body portion, and one end of the piston rod. A piston portion having a pressing plate,
The holder is made of a material different from that of the main body, and extends to the outside of the main body so as to be parallel to the piston rod and a fixed portion embedded in the main body. A pair of extending walls and an end wall connecting the extending ends of the pair of extending walls, and a cartridge storage space for storing the cartridge by the pair of extending walls and the end wall. A caulking gun characterized in that is defined. The caulking gun according to claim 1, wherein the holder is made of a high-strength material. The caulking gun according to claim 2, wherein the holder is made of metal. The fixed portion is configured as a base wall embedded in the main body portion and the pair of extending walls extending from both ends thereof, respectively.
The pair of extending walls extending in parallel at a predetermined interval from each other are connected by the base wall and the end wall, respectively, and the holder has an annular shape. The caulking gun as described in any one of 1-3. The main body portion of the grip unit includes a grip portion in which the trigger portion is pivoted, and a chamber portion in which a part of the piston portion is accommodated,
The chamber portion is composed of a front end portion on the side close to the holder and a rear end portion opposite thereto.
The grip portion is provided between the front end portion and the rear end portion in the chamber portion,
The caulking gun according to any one of claims 1 to 4, wherein the fixing portion of the holder is embedded in the front end portion of the chamber portion. The caulking gun according to claim 5, wherein the fixing portion of the holder is embedded from the front end portion to the rear end portion of the chamber portion. The said main-body part of the said grip unit has a cartridge fixing member provided so that it may protrude toward the said cartridge accommodation space from the said front-end part of the said chamber part, Either of Claim 5 or 6 characterized by the above-mentioned. The caulking gun according to one item. 8. The cartridge fixing member has a pair of fixing walls extending in parallel with each of the extending walls so as to be symmetric with respect to the piston rod. Caulking gun. The caulking gun according to claim 8, wherein the cartridge fixing member further includes a reinforcing rib that connects the pair of fixing walls. The said grip part is provided with the thumb rest which contact | abuts to the base part of the said user's thumb, when a user grasps the said grip part and the said trigger part. The caulking gun according to any one of the above.

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