JP2017144524A - Driving tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such the problem that a resin top cap cover has a hooking and mounting structure using the existing elasticity thereof to cover a body upper part of a nail driver; therefore it is carelessly dislodged when a hand comes into contact with it, and prevents the top cap cover from being carelessly dislodged.SOLUTION: An end edge on a side of an opening of the top cap cover 5 is fixed to a fitting position by being held between an exhaust cover 3 covering an exhaust port for a body housing 11 and the body housing 11. Thus, the top cap cover 5 is prevented from being dislodged unless attachment of the exhaust cover 3 is loosened.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a driving tool driven by compressed air.

  The driving tool driven by compressed air has a configuration in which a piston driver is reciprocated in a cylinder by supplying and exhausting compressed air to advance and retract a driving driver for driving a driving tool. The upper part of the body housing that houses the cylinder is hermetically closed with a top cap. A head valve for supplying and exhausting air is housed inside the top cap. In order to ensure the internal airtightness, the main body housing and the top cap are made of metal rather than resin which is easily elastically deformed. A resin cover (top cap cover) is attached to the metal top cap in order to prevent the driving material from being damaged or to reduce the impact when dropped.

  Techniques relating to the top cap cover are disclosed in the following patent documents. In the following patent document, the opening side of the rubber top cap cover is held in the mounting position on the top cap by hooking and engaging with a fixed block or fixed protector provided on the side of the tool body. Techniques to do this are disclosed. According to such a technique, the top cap cover can be attached and detached with one touch using elastic deformation of the top cap cover.

Japanese Patent No. 5125843 Japanese Patent No. 4670742

  However, the conventional mounting structure has a problem that the engagement state with respect to the tool main body side is easily detached due to loosening due to elastic deformation. In addition, conventionally, since the opening side is elastically deformed and hooked to the tool main body side to be fixed at the mounting position, when surrounding members interfere during use or carrying of the driving tool. However, there is a problem that the top cap cover is inadvertently detached due to elastic deformation. An object of the present invention is to prevent the top cap cover from being accidentally removed.

  Said subject is solved by each following invention. The first invention is a driving tool for driving a piston in a cylinder by reciprocating using compressed air as a power source. In the first invention, the top cap is airtightly coupled to the piston on the moving side of the body housing that houses the cylinder, and the top cap is attached to the top cap. In the first invention, the top cap cover is sandwiched between the exhaust cover that covers the exhaust port of the main body housing and the main body housing, and is fixed at the mounting position.

  According to the first invention, since the top cap cover is sandwiched between the main body housing and the exhaust cover and fixed at the mounting position, the top cap cover is inadvertently removed unless the exhaust cover is loosened. There is no end.

  According to a second invention, in the first invention, the exhaust cover is screwed to the main body housing.

  According to the second invention, the top cap cover can be attached and removed with a simple operation.

  According to a third aspect, in the first or second aspect, the top cap cover is provided with an engaging portion that engages with an engaging hole provided in the exhaust cover in the removing direction, and the engaging portion is engaged. It is configured to protrude from the hole and function as a protector.

  According to the third aspect, the engagement portion engaged with the engagement hole of the exhaust cover in order to fix the top cap cover at the attachment position can function as a protector protruding from the engagement hole. For example, the protector can function as an impact absorbing portion for the driving tool when dropped or the like, and can also function as a leg portion when the driving tool is placed horizontally, for example.

  According to a fourth invention, in any one of the first to third inventions, the main body housing is covered with an elastic resin layer, and an edge portion of the elastic resin layer is sandwiched between exhaust covers.

  According to the fourth invention, the exhaust cover can prevent the edge of the elastic resin layer from peeling off from the main body housing.

  According to a fifth invention, in any one of the first to fourth inventions, the space between the edge of the elastic resin layer and the exhaust cover is hermetically sealed.

  According to the fifth aspect of the present invention, it is possible to prevent exhaust leakage from between the edge portion of the elastic resin layer and the exhaust cover, thereby improving exhaust efficiency.

1 is an overall side view of a driving tool according to an embodiment of the present invention. 1 is an overall longitudinal sectional view of a driving tool according to an embodiment of the present invention. It is the longitudinal cross-sectional view which looked at the driving tool which concerns on embodiment of this invention from the (III)-(III) line arrow direction in FIG. It is an upper side view of a tool main-body part. This figure has shown the state which removed the exhaust cover. It is an upper side view of a tool main-body part. This figure has shown the state which removed the exhaust cover and the top cap cover. FIG. 4 is an enlarged view of a portion (VI) in FIG. It is a reverse view of an exhaust cover.

  Next, an embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 3, in this embodiment, a nailing machine is illustrated as the driving tool 1. In the following description, the front / rear, left / right, and upper / lower directions are used based on the user who uses the driving tool 1. For this reason, the driving direction is the lower side, and the front side as viewed from the user is the rear side.

  The driving tool 1 includes a tool main body portion 10, a driving nose portion 20, a grip portion 30, and a magazine 40. As shown in FIGS. 2 and 3, the tool main body 10 has a configuration in which a cylindrical cylinder 12 is housed in a metal main body housing 11. The outer surface of the main housing 11 is covered with a shock absorbing housing cover 19. An elastic resin layer (elastomer resin layer) is used for the housing cover 19. The resin housing cover 19 prevents the driving material from being damaged, and absorbs an impact when the driving tool 1 is dropped.

  The upper part of the main body housing 11 is airtightly closed with a metal-like top cap 2 made of metal. A striking piston 13 is accommodated in the cylinder 12 so as to reciprocate up and down. A striking driver 14 is coupled to the center of the bottom surface of the striking piston 13. The striking driver 14 extends long downward, and the tip thereof reaches the driving nose portion 20.

  The driving nose portion 20 is provided so as to extend downward from the lower portion of the tool main body portion 10. In the center of the driving nose portion 20, a driving passage 21 in which the driving driver 14 reciprocates up and down is provided. One driving tool n is supplied from the magazine 40 into the driving passage 21 one by one. In the process in which the impact driver 14 moves down in the drive path 21, the supplied drive tool n is hit and ejected from the injection port 22.

  The grip part 30 is a part gripped by the user, and is provided in a state extending from the side part of the tool main body part 10 to the side. The inside of the grip part 30 serves as a pressure accumulating chamber 31 for accumulating compressed air that is a power source. A hose connection port 32 for connecting an air hose for supplying compressed air is provided at the tip of the grip portion 30. The compressed air supplied through the air hose is accumulated in the pressure accumulating chamber 31.

  The magazine 40 has a configuration capable of accommodating a connecting driving tool (so-called wire nails, not shown) that is temporarily fixed in parallel with a large number of driving tools n in a coil shape. Thus, it is coupled to the driving nose portion 20. A driving tool feed mechanism 41 is provided between the magazine 40 and the driving nose part 20. The driving tool feeding mechanism 41 has a function of pitch-feeding the connecting driving tool in conjunction with the driving operation of the tool body 10. The connected driving tool loaded in the magazine 40 is pitch-fed by the driving tool feeding mechanism 41 in conjunction with the driving operation of the tool body 10. Thereby, in conjunction with the driving operation of the tool body 10, the driving tools n are supplied into the driving passage 21 one by one.

  A trigger lever 33 and a trigger valve 34 are provided at the base of the grip portion 30. When the trigger lever 33 is pulled upward with the fingertip of the hand holding the grip portion 30, the trigger valve 34 is turned on. When the trigger valve 34 is turned on, the head valve 15 built in the tool body 10 is opened, and compressed air is supplied from the pressure accumulation chamber 31 into the cylinder 12. When compressed air is supplied to the piston upper chamber side of the cylinder 12, the striking piston 13 is moved downward to strike the driving tool n.

  The head valve 15 is accommodated on the upper outer peripheral side of the cylinder 12. The head valve 15 is biased upward (off side) by a compression spring 15a. The upper end of the head valve 15 is regulated by a valve stopper 16. The valve stopper 16 is attached to the inner surface of the top cap 2. A top dead center damper 17 for restricting the upper moving end of the striking piston 13 is attached to the inner surface center of the top cap 2. A bottom dead center damper 18 for restricting the lower end of the striking piston 13 is attached to the lower portion of the main body housing 11.

  The striking piston 13 that reaches the lower moving end moves upward by the compressed air that has entered the piston lower chamber side of the cylinder 12. Due to the upward movement of the striking piston 13, the compressed air on the piston upper chamber side is exhausted to the outside through the exhaust holes 11 a provided on the left and right sides of the main body housing 11. The left and right exhaust holes 11 a are each covered with an exhaust cover 3. The left and right exhaust covers 3 are screwed to the sides of the main body housing 11 by fixing screws 4 respectively. The exhaust cover 3 is provided with a plurality of exhaust windows 3e penetrating between the front surface side and the back surface side. The exhaust cover 3 removes exhaust dust and controls the exhaust direction, thereby ensuring the workability of the driving tool 1.

  As shown in FIGS. 4 and 5, the exhaust cover 3 is attached to an attachment seat 11 b provided on the side of the main body housing 11. Four exhaust holes 11a and one screw hole 11c of the fixing screw 4 are provided in the left and right mounting seat portions 11b. The left and right mounting seats 11b are partitioned by seal portions 11d each having a rectangular frame. As shown in FIG. 6, the seal portion 11d is formed in a ridge having a rectangular cross section.

  On the other hand, as shown in FIG. 7, the back surface of the exhaust cover 3 is provided with a seal portion 3a having a rectangular cross section, which is also formed in a rectangular frame. A filter 3b is fitted in an area inside the seal portion 3a. The exhaust discharged from the exhaust hole 11a is removed by the filter 3b and then exhausted to the outside through the exhaust window 3e. An insertion hole 3c for inserting the fixing screw 4 is provided inside the seal portion 3a.

  As shown in FIG. 6, in a state where the exhaust cover 3 is attached to the mounting seat portion 11b, the seal portion 3a on the exhaust cover 3 side is almost mutually along the outer peripheral side of the seal portion 11d on the attachment seat portion 11b side. Located without gaps. By arranging the seal portion 3a on the exhaust cover 3 side and the seal portion 11d on the mounting seat portion 11b so as to overlap in the surface direction of the mounting seat portion 11b, exhaust leakage from the peripheral edge of the exhaust cover 3 is prevented. Thus, the exhaust gas blown out from the exhaust hole 11a can be surely exhausted from the exhaust window 3e, and the exhaust efficiency of the driving tool 1 can be improved.

  Further, the housing cover 19 is not covered with the mounting seat portion 11b. For this reason, the edge part of the housing cover 19 is located around the seal part 11d. As shown in FIG. 6, the edge portion of the housing cover 19 is sandwiched between the housing 11 by the seal portion 3 a of the exhaust cover 3 that is screwed. When the edge portion of the housing cover 19 is pressed by the seal portion 3a, the peeling is prevented.

  As shown in FIGS. 1 to 4, the metal top cap 2 is covered with a resin top cap cover 5. FIG. 5 shows a state where the top cap cover 5 is removed. The top cap 2 having a generally bowl shape is screwed to the upper end portion of the main body housing 11 at four locations around the top cap 2. Boss portions 2b for inserting the fixing screws 2a are provided at four locations around the top cap 2. Four boss receiving portions 11e are provided at the upper end portion of the main body housing 11 so as to face the four boss portions 2b.

  The top cap cover 5 is provided with four bulging portions 5a around the top cap cover 5 in accordance with the four boss portions 2b of the top cap 2. The four bulging portions 5a cover the boss portions 2b of the top cap 2 and the heads of the fixing screws 2a. The top cap cover 5 is attached so as to cover the entire top cap 2 including the boss portion 2b and the head of the fixing screw 2a. The attached state of the top cap cover 5 is maintained using the attached state of the exhaust cover 3 described above.

  Two engaging portions 5 b are integrally provided on the opening side of the top cap cover 5. The two engaging portions 5b are provided at bisected positions around the opening side. Each of the two engaging portions 5b has a block shape and is provided in a state of protruding sideways. On the other hand, an engagement hole 3 d is provided in the upper part of the exhaust cover 3. The engagement hole 3d is provided in a shape and size that allow the engagement portion 5b of the top cap cover 5 to be inserted without rattling.

  The exhaust cover 3 is screwed to the mounting seat 11b in a state where the engagement portion 5b of the top cap cover 5 is inserted into the engagement hole 3d from the back side of the exhaust cover 3, whereby the top cap cover 5 is sandwiched between the exhaust cover 3 and the main body housing 11 or the top cap 2. In this way, the end edge on the opening side is sandwiched between the exhaust cover 3 and the main body housing 11 or the top cap 2, whereby the top cap cover 5 is fixed at an attachment position covering the top cap 2.

  In addition, when the exhaust cover 3 is screwed, the engaging portion 5b is inserted into the engaging hole 3d without rattling, so that the top cap cover 5 is more securely attached to the top cap 2. Retained.

  As shown in FIGS. 3 and 6, the left and right engaging portions 5b are inserted so as to protrude further from the engaging holes 3d. The engaging portion 5b protruding from the outer surface of the exhaust cover 3 functions as an impact absorbing protector and also functions as an elastic leg when the driving tool 1 is placed on a work table or the like.

  According to the driving tool 1 of the present embodiment configured as described above, the top cap cover 5 is sandwiched (pressed) between the exhaust cover 3 and the main body housing 11 at the opening edge thereof, It is fixed at an attachment position that covers the top cap 2. For this reason, unless the screwing of the exhaust cover 3 is loosened, the attachment state of the top cap cover 5 is reliably maintained, and inadvertent dropping can be reliably prevented. Therefore, the conventional problem that the top cap cover is easily removed due to elastic deformation and the surrounding members are inadvertently removed due to interference or the like can be solved.

  Moreover, the top cap cover 5 is attached in a state where the engaging portion 5b is inserted into the engaging hole 3d of the exhaust cover 3 from the back side and hooked in the removing direction. In this respect, it is possible to more surely prevent the top cap cover 5 from being accidentally dropped.

  The top cap cover 5 can be easily removed by unscrewing the left and right exhaust covers 3.

  Further, according to the present embodiment, the engaging portion 5b provided on the top cap cover 5 functions as a portion to be hooked on the exhaust cover 3 side, and for example, when the driving tool 1 is accidentally dropped. It functions as an impact absorbing protector and can function as an elastic leg when the driving tool 1 is placed horizontally on the floor or a work table.

  Furthermore, according to this embodiment, the edge part of the housing cover 19 is pinched | interposed between the main body housing 11 by the seal part 3a of the exhaust cover 3, and the peeling is prevented. Thus, the seal portion 3a of the exhaust cover 3 has a function of preventing peeling of the edge portion of the housing cover 19 in addition to an exhaust leak prevention function.

  Various modifications can be made to the embodiment described above. For example, although the configuration in which the engagement portion 5b is provided on the top cap cover 5 side and the engagement hole 3d is provided on the exhaust cover 3 side is illustrated, the engagement protrusion provided on the back surface side of the exhaust cover is illustrated on the top cap cover side. It is good also as a structure which inserts in the engagement hole provided in, and fixes the said top cap cover to an attachment position.

  Moreover, you may abbreviate | omit the structure which inserts the engaging part 5b in the engaging hole 3d, and hooks it in the removal direction of the said top cap cover 5. FIG. Even in this case, the top cap cover 5 is fixed at the mounting position by sandwiching (pressing) the opening side edge of the top cap cover 5 between the exhaust cover 5 and the main body housing 11 or the top cap 2. Thus, it is possible to prevent the inadvertent dropout.

  Furthermore, although the engaging part 5b protruded from the engaging hole 3d and the structure which gave the function as an elastic leg part for horizontal placement to the said engaging part 5b was illustrated, the protrusion dimension of the engaging part 5b It is good also as a structure which abbreviate | omits or eliminates the function as an elastic leg part.

  Although the exhaust cover 3 screwed with the fixing screw 4 is illustrated, the illustrated configuration can be similarly applied to the exhaust cover fixed to the main body housing 11 by another means such as a clip.

  Although the nailing machine is illustrated as the driving tool 1, the configuration illustrated for other types of compressed air driven driving tools such as a so-called pin tacker and screw driving machine can be applied.

DESCRIPTION OF SYMBOLS 1 ... Driving tool (nailing machine), n ... Driving tool 2 ... Top cap, 2a ... Fixing screw, 2b ... Boss part 3 ... Exhaust cover 3a ... Seal part, 3b ... Filter, 3c ... Insertion hole, 3d ... Engagement Hole, 3e ... Exhaust window 4 ... Fixing screw 5 ... Top cap cover, 5a ... Swelling part, 5b ... Engagement part 10 ... Tool body part 11 ... Main body housing 11a ... Exhaust hole, 11b ... Mounting seat part, 11c ... Screw hole , 11d ... seal part 11e ... boss receiving part 12 ... cylinder 13 ... striking piston 14 ... striking driver 15 ... head valve, 15a ... compression spring 16 ... valve stopper 17 ... top dead center damper 18 ... bottom dead center damper 19 ... housing cover 20 ... Driving nose part 21 ... Driving path 22 ... Injection port 30 ... Grip part 31 ... Accumulation chamber 32 ... Hose connection port 33 ... Trigger lever 34 ... Trigger valve 0 ... magazine 41 ... the fastener feeding mechanism

Claims (5)

A driving tool for performing a driving operation by reciprocating a piston in a cylinder using compressed air as a power source, wherein a top cap is airtightly coupled to a piston upper moving side of a main body housing that includes the cylinder. A top cap cover is attached to the tool, and the top cap cover is sandwiched between an exhaust cover that covers the exhaust port of the main body housing and the main body housing, and is fixed at an attachment position. The driving tool according to claim 1, wherein the exhaust cover is screwed to the main body housing. The driving tool according to claim 1 or 2, wherein an engagement portion is provided on the top cap cover to engage with an engagement hole provided in the exhaust cover in a removal direction, and the engagement portion is disposed on the engagement portion. A driving tool that is configured to function as a protector by protruding from the joint hole. 4. The driving tool according to claim 1, wherein the main body housing is covered with an elastic resin layer, and an edge portion of the elastic resin layer is sandwiched between the exhaust covers. 5. 5. The driving tool according to claim 4, wherein a space between an edge of the elastic resin layer and the exhaust cover is hermetically sealed.

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