JPH0639373U - Safety device for spring-powered nailer - Google Patents

Abstract

(57) [Summary] [Structure] The spring receiving member 8 is arranged on the upper surface of the plunger 2 via the driving spring 4, and the spring receiving member 8 is arranged so as to be movable in the acting direction of the driving spring 4. The spring receiving member 8 is provided with a first enough drive spring 4 to drive the plunger 2.
The holding member 9 for holding at the position is provided, and the operating portion 10 for releasing the holding state of the spring receiving member 8 by the holding member 9 and releasing the driving spring 4 is formed. [Effect] When the nail is clogged, the operating portion 10 is operated to release the holding of the spring receiving member 8 by the holding member 9 and the spring force of the drive spring 4 is completely released, and then the nail is removed. The plunger 2 is not driven downward at the time of work, the nail can be prevented from jumping out, and the clogged nail can be safely removed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a safety device that prevents a driver from driving during a nail jam release operation in a nail driving machine that drives a nail driving driver by using a spring force as a driving source.

[0002]

[Prior art]

 The driver member, which is slidable along the driving direction, is spring-biased in the driving direction of the driving member and is made to stand by at the bottom dead center position. It is moved toward the top dead center in order to release the lock with the pulling up mechanism near the top dead center so that the nails such as staples fed to the lower position of the driver are driven by the spring force. Driven nailers are known (for example, Japanese Examined Patent Publication No. 52-46377 and Japanese Utility Model Publication No. 51-4141).

In such a spring force driven nail driving machine, when the driver and the nail are engaged with each other in the magazine and the nail is clogged when the driver drives the nail into the nail, in order to cancel the nail clogging, the magazine is installed in the driver. The front end of the magazine is opened by moving it away from the movement track.

However, when the needle is clogged, the driver is in a state before reaching the bottom dead center position, and stops while receiving the biasing force of the driving spring. Therefore, at the moment when the nail clogging is released and the nail clogging is eliminated, the driver is driven by the spring force and the nail clogging is likely to fly toward the operator or the surroundings.

[0005]

[The purpose of the device]

 The present invention solves the above-mentioned drawbacks and releases the spring force of the drive spring for the driver before the operation for releasing the jammed nail, thereby preventing the jammed nail from scattering during the releasing operation. It is an object of the present invention to provide a safety device for a force driven nail driver.

[0006]

[Means for achieving the purpose]

 In order to achieve the above object, a safety device for a spring-powered nailing machine according to the present invention comprises a plunger disposed in a housing so as to be movable along a nail driving direction, and a nail supported by the plunger. Driver, a driving spring for urging the plunger toward the nail driving direction, a magazine that accommodates the nail and is movable in a position facing the driver's movement locus and in a direction away from the movement locus. In a nailing machine having a spring receiving member, a belt receiving member that supports the other end of the drive spring, one end of which is engaged with the upper surface of the plunger, is movably arranged in the spring action direction. A holding member for holding the drive spring at a position sufficient for driving the plunger, and exposing the operation part for releasing the holding of the spring receiving member by the holding member to the outside of the housing. Characterized in that the formed.

[0007]

[Function and effect of the device]

 According to the above configuration, the holding member holds the spring receiving member at a position sufficient for the driving spring to drive the plunger during a normal nailing operation. When the nail is clogged, the spring force of the drive spring is completely released by operating the operation part to release the holding of the spring receiving member by the holding member, and then the magazine is opened to remove the jammed nail. Just remove it. The plunger is not driven downward during the removal work, the nails can be prevented from popping out, and the jammed nails can be removed safely.

[0008] Incidentally, by making the portion of the housing having the holding member screwed to the other portion, the former is screwed to turn the holding member into the spring receiving member whose holding is released again. It can be engaged and rotated again in this state to return to the original position. In this case, since there is no constitution for engaging against the action of the spring force of the drive spring, there is no fear of malfunction due to wear of the engaging portion, and the safety is excellent.

[0009]

Embodiment 1 FIG. 1 and FIG. 2 show a spring force drive type nail driving machine. The nail driving machine is provided with a plunger 2 arranged in a housing 1 so as to be movable along a nail driving direction. A driver 3 which is carried by the plunger 2 and drives the nail, a driving spring 4 which biases the plunger 2 in the nail driving direction, a position for accommodating the nail and facing the movement trajectory of the driver 3, and a movement trajectory. And a magazine 6 movable in a direction away from the plunger 2, and the plunger 2 is pulled up against the drive spring 4 by a handle operation (not shown), and the plunger 2 is locked with the pulling mechanism near the top dead center. When released, the nail supplied to the lower position of the driver 3 is driven by the spring force of the driving spring 4, and the same mechanism as that of a well-known blade force driving nailer may be adopted.

The magazine 6 includes a magazine body fixed to the housing and a slider, and may include a slider that slides along the magazine body.

The nailing machine having the above structure is provided with a safety device 7 for preventing the driver 3 from being driven at the time of a nail clogging releasing operation. The safety device 7 includes a spring receiving member 8 that supports the other end of the drive spring 4 that is engaged with the upper surface of the plunger 2, a holding member 9 that holds the spring receiving member 8 at a predetermined position, and a spring receiving member. The operation unit 10 releases the holding state of the member 8.

The spring receiving member 8 is a disk-shaped body having a peripheral groove 11 formed on the outer peripheral surface thereof, and is disposed above the plunger 2 and has a driving spring 4 having one end engaged with the upper surface of the plunger 2. It supports the end and is movable in the direction of action of the drive spring 4, that is, the first position (solid line position) and the drive position where the drive spring 4 is deflected to an extent sufficient to drive the plunger 2. The spring 4 is movably arranged between a second position (position indicated by a dotted line) where the spring 4 is released.

Next, in the side wall of the tubular portion 1a of the housing 1 that houses the plunger 2, guide holes 12 are formed at equal intervals in the circumferential direction at positions corresponding to the first position, and each case is formed. A holding member 9 is slidably supported in the inner hole 12 so as to project inward. Then, the holding member 9 is urged by the spring 13 in the direction of retracting to the outside. The holding member 9 engages with the circumferential groove 11 of the spring receiving member 8 when protruding inward and holds the spring receiving member 8 at the first position.

The operation unit 10 is formed in an annular shape and is rotatably arranged around the housing 1. A concave surface portion 15 for accommodating the protrusion 9a of each holding member 9 is formed on the inner surface of the operation portion 10, and each concave surface portion 15 has one end 15a in the circumferential direction shallow and the other end 15b deep. Has been formed.

The tubular portion 1a is screwed into another housing portion 1b as a spring receiving housing.

In the above-mentioned configuration, usually, the operating portion 10 is rotated to bring the outer end of the holding member 9 into contact with the shallow surface of the one end 15 a of the concave portion 15, so that the holding member 9 resists the spring 13 and moves. The inner end of the spring receiving member 8 is held in engagement with the peripheral groove 11 on the outer peripheral surface of the spring receiving member 8. In this case, since the holding member 9 is in the first position, the driving spring 4 is sufficiently bent to drive the plunger 2, so that the nail driving is favorably performed.

On the other hand, when the operation portion 10 is turned to make the outer end of the holding member 9 and the deep surface of the concave surface portion 15 of the operation portion 10 correspond to each other when the nail is clogged, the holding member 9 is moved by the spring 13. As a result, the inner end of the spring receiving member 8 is disengaged from the circumferential groove 11 of the spring receiving member 8, and the spring receiving member 8 is moved to the second position by the driving spring 4. Therefore, the driving spring 4 is completely released, and the driving force for the plunger 2 disappears. After that, if the magazine 6 is opened to remove the jammed nail, the plunger 2 is not driven downward during the removal work, the nail can be prevented from popping out, and the jammed nail can be safely removed. . After removing the clogging nail, the spring receiving housing 1a is rotated and screwed upward to the position of the spring receiving member 8 moved from the first position to the second position to engage the holding member 9 with the spring receiving member 8. Then, the spring receiving housing 1a may be moved downward again to return the spring receiving member 8 to the original position.

3 and 4 show another embodiment, in which a rod-shaped holding member 9 is projected inside the annular operation portion 10 and an L-shaped guide hole 12 is formed in the side wall of the housing 1. Then, the holding member 9 is penetrated through the guide hole 12, and the inner end portion of the holding member 9 is always engaged with the circumferential groove 11 of the spring receiving member 8. Then, normally, the holding member 9 is engaged with the first position in the lower portion of the guide hole 12 by the operating portion 10, and the operating portion 10 is operated to remove the clogging nail so that the holding member 9 is placed in the guide hole 12. The drive spring 4 is released by sliding it to move it to the second position. After removing the clogging nail, the spring receiving housing 1a is rotated and screwed upward, so that the holding member 9 enters the lateral hole of the inner hole 12 and returns to its original position as the spring receiving housing moves. Can be restored.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of an example of a safety device of a spring force type nail driving machine according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a vertical cross-sectional view of another example of the safety device.

FIG. 4 is a side view of the main part of the safety device of FIG.

[Explanation of symbols]

 1 Housing 3 Driver 4 Drive Spring 6 Magazine 7 Safety Device 8 Spring Receiving Member 9 Holding Member 10 Operation Section

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Haruya Ko, 6-6 Nihonbashi Hakozakicho, Chuo-ku, Tokyo Max Co., Ltd. (72) Mitsuru Takatsuru 6-6 Nihonbashi Hakozakicho, Chuo-ku, Tokyo Max Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A plunger disposed in a housing so as to be movable along a nail driving direction, a driver carried by the plunger to drive a nail, and a drive for urging the plunger in the nail driving direction. A nailing machine having a spring, a position for accommodating a nail and a position facing a movement locus of the driver, and a magazine movable in a direction away from the movement locus, wherein A spring receiving member that supports the other end is arranged so as to be movable in the acting direction of the spring, and a holding member that holds the spring receiving member at a position sufficient for the drive spring to drive the plunger is provided and the holding member is provided. A safety device for a spring-powered nailing machine, characterized in that an operating portion for releasing the holding state of the spring receiving member by the member is formed by being exposed outside the housing.