JP4461638B2 - Immersion prevention mechanism in tucker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, a large number of stoppers molded in a U-shape are accommodated in a magazine, the last stopper is pressed by a pusher arranged in the magazine, supplied into the injection port, and supplied to the injection port. Further, the present invention relates to an idle driving prevention mechanism in a tucker that drives a stopper to a material to be driven by a driver driven by power such as compressed air.
[0002]
[Prior art]
In the above-mentioned tucker, when the stopper in the magazine is lost, when the tucker is driven, blanking is performed, and the surface of the material to be driven is damaged by the driver, or it is large for driving nails into each part of the tucker An impact force acts to cause damage to the tucker. In view of this, many tackers employ a blank striking prevention mechanism that prevents the tucker from being activated when there is no stopper in the magazine. Some conventional tuckers have a contact member as a safety device that is operated by being brought into contact with a material to be driven in a projecting manner at the tip of a nose portion forming a nail injection port. In this type of tucker, the nail driver can be activated by pressing the contact member against the nose portion by pressing the nose portion against the workpiece and manually operating the trigger lever. In this model, the blanking prevention mechanism locks the contact member in the non-actuated position by the pusher in a state where the stopper in the magazine is emptied so that the tucker cannot be activated. As a problem of this mechanism, when the nail is continuously driven while sliding the surface of the material to be driven while the nose portion of the tucker is pressed against the material to be driven, Since it remains operated during operation, the contact member cannot be locked in the inoperative position when the stopper in the magazine becomes empty during If there are no nails in the magazine inside, blanking is performed and the material to be driven is damaged.
[0003]
A technique disclosed in Japanese Patent Application Laid-Open No. 9-47978 is already known as a conventional technique for an idle driving prevention mechanism in a tucker. In this tacker, the blanking prevention mechanism is configured such that a rod that supports the free end of a trip lever pivotally supported by a trigger lever is inserted into the magazine and brought into contact with the upper surface of a stopper in the magazine. The presence or absence of tools is detected. By operating the trigger lever, the rod is moved downward through the trip lever, the lower end of the rod is abutted against the upper surface of the stopper in the magazine, the movement of the rod is stopped by the stopper, and the free end of the trip lever As the side is supported at a high position, the trip lever operates the trigger valve stem to activate the tucker. When there are no or fewer stops in the magazine, the lower end of the rod does not come into contact with the stop and is moved to a lower position. By operating the lever, the trigger valve stem is not operated and the tucker is not activated.
[0004]
As another embodiment of the above publication, the central portion of the swing link is rotatably supported at the lower end of the rod that supports the free end of the trip lever, and the lower end is attached to the magazine at one end. A pin that enters into the magazine and contacts the upper surface of the stopper in the magazine is placed, and the other end of the swing link is placed in correspondence with the upper end of the contact member that projects in the tip direction of the nose portion. A prevention mechanism is shown. In this mechanism, a safety arm as a safety device is associated with the above-described idling prevention mechanism, and the above-described idling prevention mechanism and a safety mechanism using a contact member are compatible. According to this mechanism, the nailing machine is activated by the operation of the safety arm and the remaining of the stopper by the pin abutting against the stopper in the magazine, and the safety arm is not operated or is stopped in the magazine. The tucker is not activated when the tool is empty. Since this mechanism is not a mechanism that locks the safety arm in the non-operating position, the idle driving prevention mechanism operates effectively even during the above-described slipping operation.
[0005]
[Problems to be solved by the invention]
In the above prior art, every time the trigger lever is operated to activate the tucker, a rod or pin for detecting the presence or absence of a stopper in the magazine is inserted into the magazine and directly applied to the back of the stopper. There is a rod or pin applied to the stopper to support the free end side of the trip lever to operate the trigger valve. Accordingly, a load for operating the trigger valve acts on the back of the stopper every time the tucker is activated, and the stopper tends to be deformed. In addition, a colored stopper used for indoor finishing work is not suitable for such finishing work because a colored layer such as paint is peeled off.
[0006]
Furthermore, in the mechanism incorporating the safety arm constituting the safety device, the swing link is supported at the center, and the pin and the upper end of the safety arm are arranged corresponding to both ends of the swing link. Because the operating stroke of the support part at the center of the swing link is small, it is necessary to set the stroke of the safety arm larger than the stroke for operating the stem of the trigger valve, and there are restrictions on the dimensions, stroke settings, installation space, etc. of each part. There are many problems with mounting on machines.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a tucking prevention mechanism for a tucker that can reliably prevent idling without deforming the stopper or peeling off the coloring without contacting with the stopper in the magazine. .
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a contact lever that is pivotally supported by the trigger lever that activates the tucker, and slides in a vertical direction corresponding to the free end side of the contact lever. A free-running prevention lever, a slider which is arranged to be movable in the direction of the magazine stopper supply, and which is moved by engaging with the pusher when the stopper in the magazine runs out; A detecting member which is disposed oppositely and whose lower end is brought into contact with the slider so as to be controlled to move downward, and is allowed to move downward when the slider is moved, and one end side is rotatably supported by the nose portion. And the other end side is provided with an operating arm arranged to face the lower end of the idle driving prevention lever, and further, a part of the operating arm is attached to the detection member. By disposing it opposite to the end, the idle driving prevention lever is normally held at a position to support the upward movement position, and when the stopper in the magazine is lost, the slider is moved by the pusher, and the detection By releasing the restriction of the downward movement of the member, the support position of the idle driving prevention lever by the operating arm can be moved downward.
[0009]
Furthermore, the invention according to claim 2 is a contact lever provided with a base end pivotally supported by the trigger lever that activates the tucker, and a vertical direction corresponding to the free end side of the contact lever. An empty striking prevention lever that is slidably disposed, a slider that is movably disposed in a magazine stopper supply direction, and that is moved by engaging with the pusher when the stopper in the magazine is removed; A detection member which is arranged to face the slider and whose lower end is in contact with the slider is regulated to be lowered, and is allowed to move downward when the slider is moved away, and one end side is rotatable to the nose portion A first actuating arm supported at the other end opposite the lower end of the idle driving prevention lever, and a second actuating arm having a central portion pivotally supported by the first actuating arm. The upper end of the detection member and the upper end of the contact arm extending from the contact member are opposed to each other across the pivot support portion of the second operating arm, and a stopper in the magazine When the slider disappears, the slider is moved by the pusher, and the restriction of the downward movement of the detection member is released, so that the second operating arm is rotated to contact the first operating arm via the idle driving prevention lever. The support position on the free end side of the lever is maintained downward.
[0010]
【The invention's effect】
As described above, according to the present invention, the detection member for detecting the absence of the stopper in the magazine does not contact the stopper, and the slider is moved by the pusher when the stopper remains in the magazine. Since the detection member is brought into contact with the detection member, the stopper is not deformed or the coloring is not peeled off. The detection member that detects the absence of the stopper is engaged with the slider operated by the pusher to restrict the downward movement, and when the downward movement is allowed without being engaged. Therefore, the movement stroke for detecting the detection member can be set large, so that malfunction does not occur and reliable idling prevention can be performed.
[0011]
According to the second aspect of the present invention, since the contact member protrudingly disposed at the tip of the nose is not configured to be locked in the non-operating position, even if the contact member is being operated to the operating position, When the nail in the magazine runs out, the blanking prevention works and it is possible to prevent the workpiece from being damaged. Furthermore, the support position of the second arm with respect to the first arm, the contact position of the idle driving prevention lever with respect to the first arm, and the contact position of the contact arm and detection member with respect to the second arm are changed. By arbitrarily setting the lever ratio, the stroke of each member such as contact member and detection member can be arbitrarily set, so the degree of freedom in design is increased, and there are no restrictions on installation due to installation space, and it is adopted for many models. It becomes possible to do.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples shown in the drawings. FIG. 1 shows a tucker 10 provided with an idle driving prevention mechanism according to a first embodiment of the present invention, and a drive mechanism (not shown) is formed in a hollow housing 12 in which a grip portion 11 is integrally formed. The drive mechanism for the stopper loaded in the magazine 13 is accommodated between the rear part of the grip part 11 and the nose part 14 forming the injection port. Thus, it is driven out from the injection port toward the workpiece. The magazine 13 contains a large number of connected staples S that are formed in a U-shape as stoppers, and pushes the staples S into the injection port of the nose portion 14 by abutting against the last staple S. 15 is housed.
[0013]
A trigger valve for starting the tucker 10 by supplying compressed air supplied via a plug 16 connected to a compressed air supply source to the piston cylinder mechanism is housed on the base side of the grip portion 11. A valve stem 17 that is an operation portion of the trigger valve is disposed so as to protrude. When the trigger lever 18 disposed below the base of the grip 11 is operated by an operator, the valve stem 17 is pushed in, compressed air is introduced into the cylinder of the drive mechanism, the piston is driven, and the piston is connected. The driven driver operates the inside of the injection port of the nose portion 14 and drives out the staple S supplied into the injection port from the injection port. Below the trigger lever 18 is formed an idle driving prevention mechanism 20 that disables the operation of the trigger lever 18 to prevent the tucker from being activated when the staple S in the magazine 13 is exhausted.
[0014]
The structure of the idle driving prevention mechanism 20 in the above embodiment will be described with reference to FIGS. A slider 21 is slidably disposed along the supply direction of the stopper in the front portion of the upper portion of the stopper loading portion of the magazine 13, and the slider 21 is always attached to the rear by a spring 22 disposed in front of the slider 21. It is energized. An engaging protrusion 23 protruding upward is integrally formed on the upper surface of the pusher 15, and the pusher 15 pressing the staple S moves forward as the staple S is consumed, and the staple S in the magazine 13. When there is no longer any contact, the engagement protrusion 23 contacts the slider 21 to move the slider 21 forward against the spring 22. In order to allow the slider 21 to be moved by the pusher 15, the pressing force for urging the slider 21 by the spring 22 is set sufficiently smaller than the pressing force of the stopper by the pusher 15.
[0015]
Corresponding to the upper surface of the rear end portion of the slider 21, a detection pin 24 is provided as detection means supported by the magazine 13 so as to be slidable in the vertical direction so as to be in contact with the slider 21. Is constantly urged upward by the action of a spring 25 disposed on the lower surface of the upper-diameter enlarged portion of the pin. Further, an operating arm 26 having a front end portion rotatably supported with respect to the magazine 13 is disposed above the detection pin 24, and a lower surface of a central portion near the support end 26a of the operation arm 26 is the detection pin. 24 is in contact with the upper surface. Above the other end 26b side of the operating arm 26 away from the support end 26a, a lower end surface 27a of an idle driving prevention lever 27 supported by the tucker main body so as to be slidable in the vertical direction is disposed. The upper end 27 b of the idle driving prevention lever 27 is disposed in the vicinity of the trigger lever 18.
[0016]
The trigger lever 18 pivotally supports a proximal end side 28a of a contact lever 28 that pushes and operates a valve stem 17 of a trigger valve for starting the tucker 10. When the trigger lever 18 is rotated about the rotation fulcrum of the front end, the base end side 28a is moved upward and the free end side 28b of the contact lever 28 is supported at a high position. Thus, the valve stem 17 can be pushed in. On the lower surface side of the free end side 28 b of the contact lever 28, the upper end portion of the idle driving prevention lever 27 is disposed to face.
[0017]
The operation of the idle driving prevention mechanism of the above embodiment will be described with reference to FIGS. FIG. 4 shows a state in which the trigger lever 18 is operated to activate the tucker 10 when the stopper S remains in the magazine 13, and the pusher 15 pressing the stopper is a stopper in the magazine 13. At this time, the engagement protrusion 23 formed so as to protrude above the pusher 15 is not in contact with the slider 21, so that the slider 21 is operated by the spring 22. In the rear position. Since the slider 21 is positioned below the detection pin 24, the lower end of the detection pin 24 is in contact with the slider 21 and the further downward movement is restricted. The operating arm 26 is in contact with the detection pin 24 and rotated to a position where the other end 26b is disposed above, and the upper end portion of the idle driving prevention lever 27 in contact with the other end 26b is the contact lever. 28 free ends are supported in a high position.
[0018]
When the trigger lever 18 is pulled, the trigger lever 18 rotates about the pivoting fulcrum of the front end, and moves the proximal end side 28a of the contact lever 28 supported by the trigger lever 18 upward. When the proximal end side 28 a of the contact lever 28 is moved upward, the central portion of the contact lever 28 contacts the valve stem 17. Since an operation load such as compressed air pressure is applied to the valve stem 17, the central portion of the contact lever 28 is received by the valve stem 17, and the contact lever 28 is moved to the valve stem 17 as the trigger lever 18 is operated. And the free end side 28b is moved downward. By this movement, the blanking prevention lever 27 is pressed and moved downward, and the lower end of the blanking prevention lever 27 moves the other end side 26b of the working arm 26 downward to rotate the working arm 26. This acts to move the detection pin 24 downward.
[0019]
Since the detection pin 24 is in contact with the upper surface of the slider 21 and further downward movement is restricted, the operation arm 26 is prevented from rotating, thereby preventing the idle driving prevention lever 27 from moving downward. Accordingly, the free end side of the contact lever 28 is supported at a high position, so that the trigger lever 18 operates the center portion of the contact lever 28 to push the valve stem 17 and activate the tucker 10.
[0020]
FIG. 5 shows a state where the trigger lever 18 is operated to activate the tucker 10 when the stopper S in the magazine 13 is empty. When the last nail in the magazine 13 is driven, the engaging projection 23 formed on the upper portion of the pusher 15 comes into contact with the slider 21, and the slider 21 resists the pressing force of the spring 22 and the magazine. 13 is pushed and moved toward the front. When the slider 21 comes into contact with the pusher 15 and moves forward, the slider 21 is retracted from the lower end of the detection pin 24, the restriction on the downward movement of the detection pin 24 is released, and the detection pin 21 can move further downward. It becomes possible.
[0021]
When the trigger lever 18 is pulled, the base end portion 28a of the contact lever 28 that is rotatably supported by the trigger lever 18 moves upward, and the center portion of the contact lever 28 contacts the valve stem 17 of the trigger valve. The free end side 28b is moved downward while rotating in contact therewith, and the idle driving prevention lever 27 disposed in contact with the free end side 28b is pressed and moved downward. The other end 26b of the operating arm 26 that has received the lower end of the idle driving prevention lever 27 is pressed downward, the operating arm 26 rotates about the support end 26a, and the detection pin 24 is pressed downward to detect. The pin 24 is moved downward. Since the slider 21 arranged below the detection pin 24 moves forward, the lower end of the detection pin 24 cannot be received, and therefore the detection pin 24 moves further downward. The operating arm 26 engaged with the upper end of the detection pin 24 rotates around the support end 26a, the other end 26b moves downward, and the other end 26b side of the operating arm 26 rotates downward. The idling prevention lever 27 moves downward, and the support position of the free end 28b of the contact lever 28 also moves downward. The contact lever 28 is centered on the central portion in contact with the valve stem 17. Thus, the valve stem 27 is not pushed in, and the tucker 10 is not activated via the trigger valve, thereby preventing idling.
[0022]
A second embodiment of the invention shown in FIG. In addition, the same number is attached | subjected and demonstrated to the member of the same structure as the above-mentioned Example. The tucker 30 of this embodiment has a slider 21 that is moved forward by a pusher 15 disposed in the magazine 13 as in the above-described embodiment, and the lower end of the slider 21 is restricted by this slider 21. The detection pin 24 is provided. Further, the trigger lever 18 is provided with a contact lever 28 whose base end portion 28a is pivotally supported, and an idle driving prevention lever 27 is provided below the free end side 28b of the contact lever 28 so as to be movable up and down. The configuration is the same as in the previous embodiment.
[0023]
In this tucker 30, a contact member 31 as a safety device that activates the tucker 30 in conjunction with the operation of the trigger lever 18 is disposed at the tip of the nose portion 14. The contact member 31 is slidably disposed along the injection port of the nose portion 14, and a distal end portion 31 a that comes into contact with the material to be driven is disposed so as to protrude in the distal end direction of the ejection port and at the upper end portion. Is formed with a contact arm 32 that bypasses the side surface of the magazine 13 and has an upper end portion 32 a disposed on the upper surface of the magazine 13. When the contact member 31 hits the stopper with the tacker, the tip end portion 31a is moved upward by the driven material by pressing the tip of the injection port of the nose portion 14 against the surface of the driven material. The upper end 32a of the arm 32 is configured to move upward. The contact member 31 is always biased by a spring (not shown) so as to protrude toward the tip of the nose portion 14.
[0024]
The other end 33b of the first operating arm 33, on which the pivot end 33a on one end side is pivotally supported with respect to the nose portion 14, is disposed corresponding to the lower end portion of the idling prevention lever 27, A second operating arm 34 is pivotally supported at an intermediate portion of the operating arm 33 so as to be rotatable at the intermediate portion. As a result, when the pivot support 34a of the second operating arm 34 moves in the vertical direction, the first operating arm 33 is rotated about the pivot end 33a, and the free end 33b of the first operating arm 33 is moved upward. Will be moved. The upper end of the detection pin 24 is disposed in contact with one end 34b of the second operating arm 34 across the pivot support 34a, and the upper end 32a of the contact arm 32 is opposed to the other end 34c. Are arranged. Accordingly, when the upper end portion 32a of the contact arm 32 is moved upward, the second operating arm 34 is rotated in a direction in which the other end 34c moves downward about the pivot support portion 34a, and the other end 34c. The detection pin 24 that is in contact with the side is pressed downward. When the downward movement of the detection pin 24 is restricted, the rotation of the second operating arm 34 is prevented, and the entire second operating arm 34 moves upward as the contact arm 32 moves upward. Moved. When the pivoting support portion 34a of the second operating arm 34 moves upward, the first operating arm 33 is rotated in a direction to move the free end 33b side upward, and is idled in contact with the free end 33b side. The prevention lever 27 is moved upward.
[0025]
Hereinafter, the operating state of the idle driving prevention mechanism according to the second embodiment will be described with reference to FIGS. FIG. 7 shows the operating state when the stopper S remains in the magazine 13, and in the normal state where neither the trigger lever 18 nor the contact member 31 is operated as shown in FIG. A slider 21 is positioned at the lower end of 24, and the downward movement of the detection pin 24 is restricted. The contact member 31 is disposed downward by a spring action, and therefore the upper end 32a of the contact arm 32 is disposed downward, the second operating arm 34 is not rotated, and therefore the first operating arm 33 is below the free end 34b side. The idle hitting prevention lever 27 is also arranged at the lower position.
[0026]
When only the trigger lever 18 is operated from the above state, the base end 28a of the contact lever 28 pivotally supported by the trigger lever 18 is moved upward as shown in FIG. Since the idle driving prevention lever 27 supporting the side is disposed in the downward direction, the free end 28b side of the contact lever 28 is not supported at a high position, and therefore the central portion of the contact lever 28 pushes the valve stem 17 of the trigger valve. The tucker 10 is not activated. When the trigger lever 18 is not operated and only the contact member 31 is operated, the upper end 32a of the contact arm 32 is moved upward as shown in FIG. The second operating arm 34 comes into contact with the detection focus because it is pressed upward and tries to rotate, but the other end 34c abuts against the detection pin 24 whose movement in the downward direction is restricted and rotation is prevented. The other end 34c is rotated about the other end 34c, and the pivot support 34a is moved upward. As a result, the first operating arm 33 is pivoted about the pivot end 33a, and the free end 33b pushes the idle striking prevention lever 27. Move upward. The free end 28b side of the contact lever 28 is moved upward by the upward movement of the idle driving prevention lever 27. However, since the base end 28a side pivotally supported by the trigger lever 18 does not move, the contact lever 28 has a base end 28a. , The central part of the contact lever 28 cannot push in the valve stem 17 of the trigger valve, and therefore the tucker 10 is not activated. That is, the safety device that does not activate the tucker by only the operation of either the trigger lever 18 or the contact member 31 functions effectively.
[0027]
As shown in (d), when both the contact member 31 and the trigger lever 18 are operated, the idle driving prevention lever 27 is moved upward by the operation of the contact member 31 as described in the above (c). When the trigger lever 18 is operated from the state where the free end 28b side of the contact lever 28 is supported at a high position by the upper end of the idle driving prevention lever 27, the free end 28b side where the contact lever 28 is supported at the high position is moved. Rotating about the center, the base end 28a side moves upward, the central portion of the contact lever 28 pushes in the valve stem 17 of the trigger valve, and the tucker 10 is activated. Further, by operating the trigger lever 18 as described in (b), when the contact member 31 is operated after the base end 28a of the contact lever 28 is positioned upward, the contact arm 32 is moved upward. As a result of the upward movement of the second operating arm 34 and the rotation of the first operating arm 33, the idle driving prevention lever 27 is moved upward, the free end 28 b side of the contact lever 28 is pushed upward, and the contact lever 28 is at a high position. The center portion is rotated around the pivot portion on the base end 28a side, and the central portion pushes in the valve stem 17 of the trigger valve, whereby the tucker 10 is activated.
[0028]
Next, the operation in a state where the stopper S in the magazine 13 is empty will be described with reference to FIG. When all the stoppers S in the magazine 13 are driven and the magazine 13 is emptied, the pusher 15 moves to the front of the magazine 13 and the engaging protrusion 23 formed on the upper surface engages with the slider 21, and the slider 21 is moved to a position retracted from below the detection pin 24. Thereby, the detection pin 24 is in a state where the restriction on the downward movement is released. (A) shows a state in which only the trigger lever 18 is operated, and the base end 28a side of the contact lever 28 is simply arranged upward by the operation of the trigger lever 18 as described in FIG. 8 (b). Therefore, the valve stem 17 cannot be pushed in by the contact lever 28 and the tucker 10 is not activated.
[0029]
(B) shows a state in which only the contact member 31 is operated. The upper end 32a of the contact arm 32 is moved upward to push up the one end 34b of the second operating arm 34 to generate a rotational force. Rotation is prevented by the action of the spring 25 that presses the detection pin 24 upward with the other end 34c side of the contact with the upper end of the detection pin 24, so that the second operating arm 34 is in contact with the detection pin 24. The pivot support part 34a is moved upward by rotating around the end 34c. As a result, the first operating arm 33 connected by the pivot support 34a is rotated about the pivot end 33a, and the free end 33b moves the idle driving prevention lever 27 upward. The idle driving prevention lever 27 rotates the contact lever 28. However, since the trigger lever 18 is not operated, the valve stem 17 cannot be operated, and the tucker 10 is not activated.
[0030]
When the trigger lever 18 is operated as shown in (c) from the state where the contact member 31 shown in (b) is operated, the base end 28a side of the contact lever 28 is moved upward by the operation of the trigger lever 18 The center of the contact lever 28 is in contact with the valve stem 17 and is added to the valve stem 17. The rotation is prevented by the operation load, and the rotation is performed around the central portion in contact with the valve stem 17. By this rotation, the free end 28 b of the contact lever 28 moves downward, the first operation arm 33 is rotated via the idle driving prevention lever 27, and the second operation connected to the first operation arm 33. The arm 34 is rotated around the free end 34b that is in contact with the upper end 32a of the contact arm 32, and the other end 34c pushes down the detection pin 24, so that the tucker 10 is not activated.
[0031]
When the contact member 31 is operated from the state where the trigger lever 18 shown in (a) is operated, the free end 34b of the second operating arm 34 moves upward by the upward movement of the upper end 32a of the contact arm 32. However, since the upward movement of the free end 33 b of the first operating arm 33 is restricted by the operation load of the valve stem 17, the free end 33 b is rotated around the pivot support 34 a and the other end 34 c is connected to the detection pin 24. The tucker 10 is not activated and the idle shot prevention function functions effectively.
[0032]
In the above embodiment, the slider is arranged on the upper surface of the magazine, and the engaging projection for engaging with the slider is formed on the upper surface of the pusher. However, the arrangement position of these members can be arbitrarily selected. . For example, even if the slider is formed on the side surface of the magazine and the engaging protrusion is formed on the side surface of the pusher, the same effect can be obtained. Further, the stopper is not limited to a U-shaped staple, and any stopper provided in the straight magazine and supplied by a pusher that is pressed from the rear end can be used. It is possible to employ a hit prevention mechanism.
[Brief description of the drawings]
FIG. 1 is a side view of a tucker in which an idle driving prevention mechanism according to a first embodiment of the present invention is implemented.
FIG. 2 is a perspective view showing the main part of the idle driving prevention mechanism of the same embodiment as in FIG.
FIG. 3 is a longitudinal sectional view taken along the line AA in FIG.
FIG. 4 is a side view showing an operating state in which a stopper remains in the magazine of the idle driving prevention mechanism according to the first embodiment.
FIG. 5 is a side view of the operating state in which the nail in the same magazine as in FIG. 4 is removed.
FIG. 6 is a side view of a tucker implementing an idle driving prevention mechanism according to a second embodiment of the present invention.
7 is a perspective view showing the main part of the idle driving prevention mechanism of the same embodiment as FIG. 6. FIG.
FIGS. 8A and 8B show the operation in a state where the stopper remains in the magazine of the blanking prevention mechanism according to the second embodiment, where FIG. 8A shows a state before operation, and FIG. 8B shows only the trigger lever. The operated state, (c) shows the state where only the contact member is operated, and (d) shows the state where both the trigger lever and the contact member are operated.
FIGS. 9A and 9B show the operation of the emptying prevention mechanism according to the second embodiment when the stopper in the magazine is empty, in which FIG. 9A shows a state where only the trigger lever is operated, and FIG. A state in which only the member is operated, (c) shows a state in which both the trigger lever and the contact member are operated.
[Explanation of symbols]
10 Tucker
13 Magazine
14 Nose club
15 Pusher
17 Valve stem
18 Trigger lever
20 Immersion prevention mechanism
21 Slider
22 Spring
23 Engagement protrusion
24 detection pin
25 Spring
26 Actuating arm
27 Lever prevention lever
28 Contact lever
30 Tucker
31 Contact material
32 Contact Arm
33 First actuating arm
34 Second operating arm

Claims (2)

A magazine that accommodates a number of stoppers, and an injection port that is slidably disposed in the magazine and that engages with the rearmost stopper in the magazine and presses the stopper forward to form a nose portion. A pusher to be supplied; drive means for driving the driver by power such as compressed air; and driving the stopper supplied into the injection opening by the driver from the injection opening; and a manually operable trigger for activating the drive means In a tucker with a lever,
A contact lever provided with a proximal end pivotally supported by the trigger lever that activates the tucker;
An idle driving prevention lever arranged to be slidable in the vertical direction corresponding to the free end side of the contact lever;
A slider that is movably disposed in the magazine stopper supply direction, and is moved by engaging with the pusher when the stopper in the magazine runs out;
Detecting means arranged to face the slider and having its lower end abutted against the slider to restrict the downward movement, and to allow the downward movement when the slider is moved;
One end side is rotatably supported by the nose part, and the other end side is provided with an operating arm arranged to face the lower end of the idle driving prevention lever,
Furthermore, by disposing a part of the operating arm so as to oppose the upper end of the detecting means, the idle driving prevention lever is normally held at a position where it is supported at the upward movement position, and the stopper in the magazine is eliminated. When the slider is moved by the pusher and the restriction of the lowering movement of the detection means is released, the support position of the idle driving prevention lever by the operating arm can be moved downward. Immersion prevention mechanism. A magazine that accommodates a number of stoppers, and an injection port that is slidably disposed in the magazine and that engages with the rearmost stopper in the magazine and presses the stopper forward to form a nose portion. A pusher to be supplied; drive means for driving the driver by power such as compressed air; and driving the stopper supplied into the injection opening by the driver from the injection opening; and a manually operable trigger for activating the drive means In a tucker comprising a lever and a contact member that protrudes forward of the nose part and is operated by a driven material,
A contact lever provided with a proximal end pivotally supported by the trigger lever that activates the tucker;
An idle driving prevention lever arranged to be slidable in the vertical direction corresponding to the free end side of the contact lever;
A slider that is movably disposed in the magazine stopper supply direction, and is moved by engaging with the pusher when the stopper in the magazine runs out;
Detecting means arranged to face the slider, the lower end of the lower end being in contact with the slider, and the downward movement is restricted, and the downward movement is allowed when the slider is moved away;
A first operating arm, one end of which is rotatably supported by the nose portion, and the other end of which is arranged to face the lower end of the idle driving prevention lever;
A second operating arm pivotally supported at the center by the first operating arm, and contacts extending from the contact member and the upper end of the detecting means at both ends of the second operating arm The upper ends of the arms are arranged opposite each other,
When the stopper in the magazine is lost, the slider is moved by the pusher, and the restriction of the downward movement of the detecting means is released, so that the second operating arm is rotated to prevent the first operating arm from being blown away. A tapping prevention mechanism for a tucker characterized in that the support position on the free end side of the contact lever via the lever is maintained downward.

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