JP3099560U - Prevention device for idle driving of nailing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an idle driving prevention device of a nailing machine which can be applied to extremely thin nails and reliably prevents an empty driving.
SOLUTION: In a magazine for accommodating nails of a nailing machine, an engaging block which moves by receiving a pressing force of a nail pushing plate is formed on a main body of the apparatus, an upper end thereof is extended to form a tongue portion, and a lower end is formed in an arm shape. , And further vertically downward to form a stop having a square end face, and a square groove is formed above the corresponding stop to control the trigger in conjunction with the trigger. A safety plate is provided, and in the magazine, a nail pushing plate for pushing an elastic body and a nail one by one into a nail groove is slidably provided, and the engaging block has a shaft support hole at a center position of an upper half portion. And a pointed portion and an inclined contact portion are formed at the bottom end at an acute angle α of less than 90 degrees, and are provided between the safety plate and the nail pushing plate together with the elastic body. To form a side wall with which the nail push plate abuts.
[Selection diagram] Fig. 1

Description

The present invention relates to a nail driving machine, and more particularly, to a device for preventing an empty driving of a nail driving machine for surely preventing an empty driving of a nail.

Conventional nailing machines can be broadly classified into two types: those suitable for driving nails with a wire diameter of about 1.2 mm or more and those suitable for nails with a wire diameter of about 0.64 mm. Can be. For nailers suitable for nails with a wire diameter of 1.2 mm or more, a mechanism has been developed to prevent locking by providing a locking action by providing a safety pin for locking to a trigger.

However, such a technique cannot be applied to nails having a wire diameter of about 0.64 mm. For nails with a wire diameter of about 0.64 mm, the restriction on thickness is reduced at the part where the nail plate locks, so that when the plate is moved near the safety pin, the nail is securely engaged with the safety pin engagement hook. It cannot be locked, and often missed.

釘 Nailers suitable for nails with a wire diameter of about 0.64 mm usually drive nails using compressed air. However, no hitting prevention mechanism is provided in the apparatus to date. In addition, when the nail is extremely thin, it is difficult to clearly recognize whether or not the nail has been driven into the nailing portion of the work after the worker has driven the nail. In particular, when the work is hurried to meet the construction period, the worker's fatigue may be overlapped, and it is inconsequential to confirm that the nail is driven into the nailing portion of the work. Therefore, even if the trigger of the nail driver is pulled, the nail is not driven into the work. Needless to say, the situation occurs, which affects the strength of the nailing point of the work.

The present invention is suitable for nailing a nail having a wire diameter of about 0.64 mm. In the case where the magazine has no nails or if an empty strike occurs, the trigger can be securely locked to prevent the empty strike. It is an object to provide a nailing machine.

In addition, this invention is suitable for nailing a nail with a wire diameter of about 1.2 mm or 1.2 mm or more, and when locking the trigger, the locking member is tightly locked, so that a reliable locking action can be obtained. It is an object to provide a nailing machine.

Accordingly, the present inventor has conducted intensive studies in view of the drawbacks found in the prior art, and as a result, has provided an engaging block rotatably in a magazine for loading nails of a nailing machine, and linked with the operation of the trigger. It is focused on the point that the problem can be solved by the structure of the anti-launching device of the nailing machine in which a safety plate having an action of moving up and down and locking the trigger by locking to the engagement block is provided in the apparatus main body. The present invention was completed based on such knowledge.

Hereinafter, this invention will be specifically described.
An engaging block (7), which is moved by receiving a pressing force of a nail pushing plate (5) into a magazine (4) for accommodating a nail of the nailing machine. An anti-punching device for a nailing machine comprising:
A stopper having a rectangular end surface, the upper end of which is extended to form a tongue (62), the lower end is extended in the shape of an arm, and is further extended vertically downward in the device body (1) of the nailing machine. In addition to forming the portion (63), a rectangular groove (64) is formed above the corresponding stop (63), and when the trigger (11) is pressed, it moves upward in conjunction with the trigger (11). When the pressure is released, a safety plate (6) that moves downward and returns to the original position is provided,
Due to the elasticity of the elastic body (55), the magazine (4) is pressed against the nail (2) loaded in the magazine (4), and the nail (2) is moved one by one into the nail groove (18) of the nailing machine. Nail pushing plate (5) is provided slidably,
The engagement block (7) has a shaft support hole (70) formed in the center of the upper half, and an elastic body is provided between the safety plate (6) and the nail pushing plate (5). And a pointed portion (74) is formed at the bottom end at an acute angle α of less than 90 degrees, and the bottom end edge extends upward from the pointed portion (74) to form an inclined contact portion ( 77), and from the one end of the inclined contact portion (77), upwardly, a side wall (78) with which the nail push plate (5) contacts is formed, and from the pointed portion (74). An action line (75) of force for circularly moving the engagement block (7) is formed toward the center point of the shaft support hole (70), and the action line (75) is perpendicular to the center point of the shaft support hole (70). Forms a declination (β) with the line that descends to
The engagement block (7) slides under the urging force of the elastic body, and the pointed portion (74) engages with the rectangular groove (64) of the safety plate (6), and the safety plate ( The trigger (11) is configured to be locked by preventing the upward movement of the stop (63) of (6).

According to a second aspect of the present invention, the engagement block (7) and the elastic body are rotatably mounted on the support seat (8) via the rotary shaft (79). The support seat (8) is provided at a position on the magazine (4) close to the safety plate (6).

According to a third aspect of the present invention, there is provided an apparatus for preventing an idle driving of a nailing machine, wherein ears (81) are formed on both side surfaces of the support seat (8) according to the first aspect, and the engaging shaft is formed by the rotation shaft (79). The joint block (7) is rotatably provided on the support seat (8).

According to a fourth aspect of the present invention, the support seat (8) in the first aspect forms an upper surface that limits the range of the rotational movement of the engagement block (7).

According to a fifth aspect of the present invention, there is provided an apparatus for preventing an idle driving of a nailing machine, wherein a flat fixing plate (87) is integrally formed at one end of the support seat (8) according to the first aspect, and the fixing plate (87) is attached to the magazine. Fix to (4).

According to a sixth aspect of the present invention, the elastic body in the first aspect is a torque spring (84).

According to a seventh aspect of the present invention, there is provided a device for preventing an idle driving of a nailing machine, wherein an inclined groove (73) is formed in the engaging block (7) according to the first aspect, and one end of the torque spring (84) is connected to the inclined groove (73). Insert into.

According to an eighth aspect of the present invention, there is provided an apparatus for preventing an idle driving of a nailing machine. (52) is formed.

According to a ninth aspect of the present invention, the side wall (72) of the engagement block (7) in the first aspect is formed vertically.

空 The device for preventing the nail driving of the nailing machine according to the present invention can be applied to a nail driving having a wire diameter of about 0.64 mm, and has an advantage that the nail driving is reliably prevented from being driven.

The present invention provides an apparatus for preventing an idle driving of a nailing machine, in which an engaging block is rotatably provided in a magazine for loading nails of the nailing machine, and is vertically moved in conjunction with the operation of a trigger. Then, a safety plate having an action of locking the trigger by locking to the engaging block is provided in the apparatus main body, thereby realizing the purpose of preventing the nail from being hit by an empty shot.

FIG. 1 discloses a nail driving machine for driving a thin nail having a wire diameter of about 0.64 mm as an embodiment. The nailing machine is provided with a trigger (11) for driving a connecting nail into the device body (1) as disclosed in the drawing, and a shape substantially similar to the trigger (11) is provided behind the trigger (11). The safety switch (12) is provided. The safety switch (12) has an action of preventing (or releasing) the pressing force received by the trigger (11). A trigger valve (13) is provided at a position above the trigger (11) of the apparatus main body (1). At the bottom end of the trigger valve (13), a valve rod (14) is provided in a projecting shape.

When the trigger (11) is pressed, it is pressed against the valve rod (14) to open the trigger valve (13). For this reason, the compressed air in the apparatus main body (1) operates instantaneously, presses the piston (15) provided in the pneumatic cylinder (17) in the apparatus main body (1), and connects to the piston (15). The nail rod (16) is linked. The nail driving rod (16) drives the nail (20) in the nail groove (18) into the work (3) in conjunction with the operation of the piston (15) (see FIG. 5).

安全 As disclosed in FIG. 1, a safety plate (6) is provided on the device body (1). The safety plate (6) has a guide groove (61) formed at a substantially intermediate position, is provided slidably in the apparatus main body (1), and has an arm-shaped extending portion formed at a lower end thereof. Further, the extending portion extends vertically downward to form a stop portion (63) having a square end surface. Further, a rectangular groove (64) is formed above the corresponding stop (63). The upper end of the safety plate (6) extends toward the trigger (11) to form a tongue (62). The tongue (62) is interposed between the trigger (11) and the valve rod (14). When the trigger (11) is pulled and the valve rod (14) is pressed, the tongue (62) is simultaneously pressed. In conjunction with this, the safety plate (6) and the abutment (63) formed at the bottom end thereof move upward.

開 示 As disclosed in FIG. 1, a magazine (4) for accommodating nails is provided on the side of the nail groove (18) at the bottom end of the apparatus body (1). A nail pushing plate (5) is slidably provided in the magazine (4) (see FIGS. 2 and 2a). The nail pusher plate (5) bends the upper edge and the lower edge to form an upper fitting portion (52) and a lower fitting portion (53). An abutment member (54) is provided. One end of the contact member (54) is fitted to each fitting portion, and the other end is fitted to an elastic body (55) provided in the magazine (4). Further, a plurality of convex portions are formed at the other end of the nail pushing plate (5) to be a nail pushing nail (51). In the state where nailing is not performed, the nail pusher plate (5) is in a state of being pressed against the nail (2) loaded in the magazine (4) by the elasticity of the elastic body (55).

The members provided in the apparatus main body (1) described above are basic components, and are members to be provided in a nailing machine suitable for driving nails having a wire diameter of about 0.64 mm. It is a necessary member for a nailing machine suitable for driving a nail having a diameter of 1.2 mm or 1.2 mm or more.

、 In the present invention, in addition to the basic components described above, an engagement block (7) is provided in the apparatus body (1) (see FIG. 1). The engaging block (7) has a shaft support hole (70) formed at the center of the upper half (see FIG. 3), and the upper end is formed flat to form a contact wall (71). An inclined groove (73) is formed at a position near the bottom edge of one of the side walls (72). The bottom surface is formed at an acute angle α whose angle is less than 90 degrees from the lower edge of the side wall (72), and the lower edge of the side wall (72) is formed as a pointed portion (74), and the inclined bottom surface is formed as an inclined contact portion. (77). One end of the inclined contact portion (77) extends upward to form a vertical side wall (78). The side wall (78) comes into contact with the upper fitting portion (52) of the nail push plate (5) and receives a pressing force. Further, an action line (75) of a force for circularly moving the engagement block (7) is formed from the pointed portion (74) to the center point of the shaft support hole (70), and the action line (75) is A declination β is formed with a line that descends vertically from the center point of the support hole (70). With this configuration, the engagement block (7) slides in a predetermined direction when necessary.

The engagement block (7) is rotatably provided on the support seat (8) via a rotation shaft (79) (see FIGS. 4 and 4a). The support seat (8) is integrally formed with ears (81) each having a through hole (83) formed at both side edges, and an upper surface (82) is formed between both ears (81). One end of the upper surface (82) extends to form a flat fixing plate (87). The rotation shaft (79) is inserted through the through hole (83) of the ear (81) and the shaft support hole (70) of the engagement block (7), and is fitted with an elastic member. In the embodiment, the elastic member is a torque spring (84), and a spring edge (85) of the torque spring (84) is in contact with the upper surface (82), and a spring edge (86) at the other end is It is bent and fitted into the inclined groove (73) of the engagement block (7). Therefore, the engagement block (7) receives the urging force of the torque spring (84) and slides. Further, the support seat (8) is provided by fixing the fixing plate (87) at a position close to the safety plate (6) in the magazine (4) with fixing bolts (see FIG. 1).

Ｌ Further, as disclosed in FIG. 1, an L-shaped guide seat (9) is provided inside the support plate (19) forming the nail groove (18). The guide seat (9) is formed with a guide hole (91) into which the abutment portion (63) of the safety plate (6) enters. Therefore, when the safety plate (6) moves upward (see FIG. 5), moves downward and returns to the original position (see FIG. 1), or the operation is reliably prevented (see FIG. 6). In any case, the direction of the operation is deflected by the guide of the guide hole (91), and does not move obliquely.

According to the above configuration, as shown in FIG. 1, when there are a large number of unpunched nails (2) in the magazine (4), the nail push plate (5) is connected by the biasing force of the elastic body (55). The nails (2) are extruded one by one into the nail groove (18). In this case, the upper fitting portion (52) of the nail push plate (5) and the side wall (78) of the engaging block (7) come into contact with each other by the contact of the nail (2) remaining in the magazine (4). The distance h is maintained without any problem. Therefore, when the trigger (11) is pulled and the safety plate (6) is moved upward in conjunction with the state where the engagement block (7) is not pressed, the safety plate (6) is engaged. The operation is not blocked by the block (7). In a state in which the trigger (11) is not pulled and the safety plate (6) is not moved upward (see FIG. 1), the abutment portion (63) of the safety plate (6) moves the guide seat (63). It exists in the guide hole (91) of 9). For this reason, in the safety plate (6), the abutment portion (63) can freely move up and down in the guide hole (91) by the operation of pulling the trigger (11). However, the distance h is reduced by hitting the nails (2) one by one, and reaches a limit state of h = 0 as disclosed in FIG.

In the present invention, by changing the length of the upper fitting portion (52), the nails (2) are punched out one by one, and the nails (4) in the magazine (4) when the limit state (h = 0) is reached. 2) The remaining amount can be controlled. In FIG. 5, the remaining amount of the nails (2) in the magazine (4) is only two, and one of the nails (20) is driven out by the nail driving rod (16) and driven into the work (3). Disclose the state of In this case, the upper fitting portion (52) of the nail pushing plate (5) has already contacted the side surface (78) of the engagement block (7), and is in the limit state (h = 0). However, the engagement block (7) does not rotate. Therefore, the operation of the safety plate (6) is not prevented by the engagement block (7) even when the trigger (11) is pulled. Conversely, when the limit state (h = 0) is reached, in the present invention, the length of the upper fitting portion (52) is shortened by the distance of the wire diameter of one nail, so that the magazine (4) The remaining amount of the nail (2) can be reduced to one. Such practical applications fall within the scope of the technology in this drawing.

After the limit state (h = 0) disclosed in FIG. 5 occurs and the nail (20) in the nail groove (18) is driven out, as shown in FIG. 6, the nail (2) is inserted into the magazine (4). ) Is in a state of only one (ie, a state of being exhausted). As a matter of course, the length of the upper fitting portion (52) may be changed as described above. In the limit state disclosed in FIG. 5, when the nail (20) is driven out, the inside of the magazine (4) is in a state in which the nail is driven empty (or in a state without the nail). In this case, when the nail pushing plate (5) is moved again in the direction of the nail groove (18) by a distance corresponding to the diameter of one nail, the upper fitting portion (52) is moved to the side surface (78) of the engaging block (7). 6), and as shown in FIG. 6, the engagement block (7) rotates toward the safety plate (6) while receiving the elasticity of the torque spring (84). At this time, the pointed portion (74) of the engagement block (7) stops in the square groove (64) formed on the stop (63) of the safety plate (6). In this state, even when the trigger (11) is pulled, the inclined contact portion (77) of the engagement block (7) that has been rotated is prevented from moving above the contact portion (63) of the safety plate (6). Then, it is locked. For this reason, it must be indicated that the nail must be loaded.

When the connecting nail is reloaded into the magazine (4), the nail pushing plate (5) is pushed away from the engaging block (7), the engaging block (7) returns to its original position, and the lock is opened again. It will be in the state that was done. Accordingly, the state returns to a state where the nail can be driven out by pulling the trigger (11) (see FIGS. 1 and 5).

擺 The distance of sliding of the engagement block (7) is limited by the upper surface (82) of the support seat (8). The contact wall (71) of the engagement block (7) moves left and right by a predetermined distance along the arc line, and then contacts the upper surface (82) (see FIGS. 1 and 6).

In this invention, in the unlocked state described above, the engagement between the pointed portion (74) and the rectangular groove (64) and the engagement between the inclined contact portion (77) and the stop portion (63) are loosened. It has the characteristic that it does not occur and that it is tightly pressed. This is because the inclined surface of the inclined contact portion (77) is formed by an acute angle α that is less than 90 degrees from the pointed portion (74), and between the pointed portion (74) and the center of the shaft support hole (70). Is separated from the vertical line (76) extending downward from the center of the shaft support hole (70) by the declination β. Therefore, the operation of the engagement block (7) can be more restricted. That is, in the present invention, when the engagement block (7) receives the pressing force, the vertical line (76) extending downward from the center of the shaft support hole (70) moves only in the direction of the declination β. It has unity of the direction of motion that makes a rotary motion. In addition, due to the configuration in which the engagement block (7) is rotated, even if the nail is extremely thin with a wire diameter of about 0.64 mm, the force exerted by the engagement block (7) is adjusted by the pressing distance by the wire diameter. It can be converted to a relatively large travel distance which occurs when the line (75) makes a rotational movement. In addition, the longer the distance of the line of action (75), the longer the distance that the engagement block (7) moves by the circular motion, and the direction in which the engagement block (7) rotates is determined by the safety plate ( 6) The contact portion (63) is moved in the moving direction. Therefore, it has a feature that reliable operation is prevented and tightness is obtained, and the operation of pushing the trigger (11) and driving out a nail is reliably prevented.

The present invention can be applied to nails having different wire diameters by appropriately adjusting the length of the nail pusher plate (5), the line of action (75) of the force of the engagement block (7), and the deflection angle. Thus, it is possible to reliably prevent the nail driving operation and obtain the tightness.

The above is a preferred embodiment of the present invention, and does not limit the scope of implementation of the present invention. Therefore, any modifications or changes that can be made by those skilled in the art, which are made in the spirit of the present invention and which have an equivalent effect on the present invention, belong to the scope of the claimed utility model registration. And

1 is a sectional view of a nailing machine having a nailing prevention device according to the present invention. It is a side sectional view of the nail push board in this invention. It is explanatory drawing showing the cross section along the aa line in FIG. 2, and the front of this nail push plate. It is a perspective view of the engagement block in this invention. FIG. 4 is a side sectional view of a support seat provided with an engagement block disclosed in FIG. 3. FIG. 5 is a sectional view taken along line 4a-4a in FIG. FIG. 7 is an explanatory diagram showing a state in which the magazine has no nails in the present invention. FIG. 7 is an explanatory view showing a state in which the magazine has no nails and the trigger is locked in the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Main body 11 Trigger 12 Safety switch 13 Trigger valve 14 Valve rod 15 Piston 16 Nail rod 17 Atmospheric cylinder 18 Nail groove 19 Support plate 2 Nail 20 Nail 3 Work 4 Magazine 5 Nail pushing plate 51 Nail pushing nail 52 Upper fitting part 53 Lower fitting part 54 Contact member 55 Elastic body 6 Safety plate 61 Guide groove 62 Tongue 63 Stop part 64 Square groove 7 Engagement block 70 Shaft support hole 71 Contact wall 72 Side wall 73 Inclined groove 74 Pointed part 75 Action line 76 Vertical line 77 Inclined contact portion 78 Side wall 79 Rotary shaft 8 Support seat 81 Ear portion 82 Upper surface portion 83 Through hole 84 Torque spring 85 Spring edge 86 Spring edge 87 Fixing plate 9 Guide seat 91 Guide hole

Claims (9)

An anti-punching device for a nailing machine, comprising an engaging block that moves by receiving a pressing force of a nail pressing plate in a magazine for storing nails of the nailing machine,
On the device body of the nailing machine, the upper end extends to form a tongue, the lower end extends in the shape of an arm, and further extends vertically downward to form an abutment having a square end surface, Above the corresponding stop, a rectangular groove is formed, and a safety plate is provided that moves upward in conjunction with pressing the trigger, moves downward when the trigger pressing pressure is released, and returns to its original position,
In the magazine, a nail pushing plate is provided slidably, which presses against the nail loaded in the magazine by the elasticity of the elastic body and pushes the nail into the nail groove of the nailing machine one by one,
The engagement block has a shaft support hole formed at the center of the upper half, and is provided between the safety plate and the nail push plate together with the elastic body, and has an angle of 90 degrees at the bottom end. A pointed portion is formed at an acute angle that is lower than that, and a bottom edge portion extends upward from the pointed portion to form an inclined contact portion, and further, the nail is formed from one end of the inclined contact portion upward. Along with the side wall against which the push plate abuts, an action line of force for circularly moving the engagement block is formed from the pointed portion to the center point of the shaft support hole, and the action line is formed from the center point of the shaft support hole. Form a declination with a vertically descending line,
The engaging block slides under the urging force of the elastic body, and the pointed portion engages with the rectangular groove of the safety plate, thereby preventing the safety plate from moving upward. An apparatus for preventing an idle driving of a nailing machine, wherein the trigger is configured to be in a locked state. 2. The device according to claim 1, wherein the engagement block and the elastic body are rotatably provided on a support seat via a rotating shaft, and the support seat is provided on the magazine at a position close to the safety plate. 2. The device for preventing an idle driving of a nailing machine according to item 1. 2. The nailing machine according to claim 1, wherein ears are formed on both side surfaces of the support seat, and the engaging block is rotatably provided on the support seat by the rotation shaft. Prevention device. The device according to claim 1, wherein the support seat forms an upper surface that limits a range of rotation of the engagement block. The apparatus according to claim 1, wherein a flat fixing plate is integrally formed at one end of the support seat, and the fixing plate is fixed to the magazine. The device according to claim 1, wherein the elastic body is a torque spring. The device according to claim 1, wherein an inclined groove is formed in the engagement block, and one end of the torque spring is inserted into the inclined groove. The device according to claim 1, wherein the nail pusher plate forms an upper fitting portion that presses and slides a side wall of the engagement block. The device according to claim 1, wherein a side wall of the engagement block is formed vertically.

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