JP2004167650A - Hammering tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and accurately adjust driving depth while securing the function of a safety device in a hammering tool of a gas combustion type or the like. <P>SOLUTION: The hammering tool is provided with a sliding type inner guide 17 for guiding the advancing/retreating movement of a blade (a rod) and the advancing movement of a fastener, and an outer guide 16 (19, 20) for holding the inner guide 17 slidably. The tip part of the inner guide 17 is exposed from the tip of the outer guide 19, and a screw type nose 40 is mounted to the exposed part. Even if the greater part of a head 3 is surrounded by a shroud 18, the driving depth can be easily and accurately adjusted by rotationally operating the nose 40. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a gas combustion type driving tool or the like.
[0002]
[Prior art]
A driving tool such as a nailing machine or a nail driving machine includes a tool utilizing compressed air, a tool utilizing electromagnetic force, and a tool utilizing combustion pressure of gas. Examples of a gas-fired driving tool are described in Patent Literature 1 and Patent Literature 2.
[0003]
The driving tool disclosed in Patent Literature 1 includes a movable inner guide that guides a fastener and a blade, and an outer guide that guides sliding of the inner guide, and a tip of the inner guide is slightly moved from a tip of the outer guide. Only the dimensions are exposed. Then, when the tip of the inner guide is pressed against the work, the inner guide is retracted, the lock is released, and when the trigger is pulled, the blade moves forward.
[0004]
In the case of Patent Literature 1, the distal end portion of the outer guide is elongated, so that there is an advantage that it can be easily driven into, for example, a narrow place.
[0005]
In Patent Literature 2, the guide of the fastener and the blade is performed by a fixed guide member fixed to the main body, and a probe having a nose hitting a work is provided as a safety device. The nose is cylindrical and covers the distal end of the fixed guide member.
[0006]
When driving fasteners such as studs into a work using these driving tools, for example, driving the head into a state where the head protrudes from the surface of the work, or driving the head into the state where the head is pressed into the inside of the work There are times when you want to change the implantation depth. For this reason, the driving depth can be adjusted.
[0007]
In Patent Literature 1 as this driving depth adjusting means, in fixing the block pushed by the inner guide to the interlocking member forming a part of the safety device with a screw, by adjusting the fixing position of the block in the axial direction of the blade, The position where the inner guide is fully retracted is adjusted.
[0008]
On the other hand, Patent Document 2 addresses the problem of fixing the probe to the interlocking member with a screw by shifting the mounting position of the probe with respect to the interlocking member in the front-back direction.
[0009]
[Patent Document 1]
JP 2001-162560 A [Patent Document 2]
JP 2001 170874 A
[Problems to be solved by the invention]
However, the adjustment of the driving depth by shifting the inner guide and the probe as a whole is a work of loosening and retightening the screw each time, so that the adjustment work is troublesome. In addition, since the block or probe and the interlocking member only overlap, it is difficult to grasp how much the two have been shifted, and it is difficult to accurately adjust them.
[0011]
In addition, in this type of driving tool, since the interlocking member as a safety device is generally covered with a shroud (cover), it is necessary to remove the shroud one by one when adjusting the driving depth. Adjustment became more troublesome.
[0012]
Furthermore, in order to ensure the function of the safety device, it is necessary to prevent the user from easily removing the shroud, but then the depth adjustment itself cannot be performed. This was inconsistent with the ease of depth adjustment.
[0013]
An object of the present invention is to improve such a current situation.
[0014]
[Means for Solving the Problems]
The driving tool according to the first aspect of the present invention includes a main body having a built-in rod-shaped blade for driving a fastener, a magazine for supplying one fastener at a time in front of the blade, and a probe or a guide that retreats when pressed against a work. And a nose for adjusting the driving depth that is movable in the axial direction of the blade is attached to the tip of the probe or guide.
[0015]
The driving tool according to the second aspect of the present invention includes, as a basic configuration, a main body in which a rod-shaped blade for driving a fastener is built in, a cylindrical slide-type inner guide that guides the blade forward, and an inner guide. An outer guide that is slidably held, the tip of the inner guide is exposed from the tip of the outer guide, and by retreating the inner guide, an interlocking body for releasing the driving lock of the blade is retreated together. In addition, the interlock is surrounded by a shroud so that it cannot be operated from the outside.
[0016]
And, as a unique configuration, a nose for adjusting the driving depth is screwed into the tip of the inner guide, and the dimension of the nose exposed forward from the outer guide is substantially the same as the stroke required to release the driving lock. They are set to the same size.
[0017]
[Action and Effect of the Invention]
According to the present invention, even if the shroud is provided, the adjusting nose is exposed to the outside, so that the driving depth can be adjusted extremely easily even with the shroud attached. In particular, when the nose is formed as a screw type as described in claim 2, fine adjustment can be accurately performed with a simple operation, which is particularly preferable.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
[0019]
(1). Overall Overview This embodiment is applied to a driving tool that drives a tack, a pin, or a nail by using the combustion pressure of gas. 1 is an overall side view, and FIG. 2 is a perspective view as seen from the front. As shown in these figures, the driving tool includes a main body 1 having a built-in blade (rod) 2 and a main body. The head 3 includes a head 3 attached to a front end thereof and a magazine 4 overlapping the lower surface of the head 3.
[0020]
The main body 1 includes a main body case 5 surrounding a cylinder to be described later and a rear case 6 attached to a rear end of the main body case 1. On a lower surface of the main body case 5, a grip 7 having an inclined shape in a side view and an inclined shape located in front thereof are provided. And the gas storage section 8 are provided integrally. A trigger 9 is provided above the grip 7. At the lower end of the grip 7, a battery storage unit 10 is provided integrally, and the battery storage unit 10 and the gas storage unit 8 are integrally connected.
[0021]
Reference numeral 11 denotes a lid of the gas storage unit 8. A front cover 12 made of a material such as plastic or rubber is attached to a front portion of the main body case 5. The front cover 12 is completely or almost in close contact with the outer peripheral surface of the main body case 5 and has a ventilation hole 13 formed therein. The ventilation hole 13 is a filter 14 made of a material such as a fine mesh. It is closed by.
[0022]
FIG. 3 is a side view in a state where the magazine 4 is removed from the main body 1, FIG. 4A is a perspective view of the head 3 in an upside down state, and FIG. 3B is a perspective view of an upper part of the magazine 4. .
[0023]
As will be described in detail later, the head 3 includes a fixed outer guide 16, a movable inner guide 17, and a shroud 18. The outer guide 16 is composed of an upper member 19 and a lower member 20, and an inner guide 17 is arranged between these upper and lower members 19, 20.
[0024]
The magazine 4 includes a storage portion 24 having a groove 23 into which the connection fastener 21 is loaded, and an upper reinforcing member 25 fixed to an upper end thereof. The storage portion 24 is configured to push the connection fastener 21 upward. Is mounted. The pusher 26 is pulled upward by a spring (not shown).
[0025]
As can be understood from FIG. 4, the upper reinforcing material 25 of the magazine 4 has a first elongated hole 27 through which the fastener 22 escapes, and a portion of the first elongated hole 27 through which the head of the fastener 22 escapes is an oval and wide. Guide hole 28.
[0026]
On the other hand, as can be understood from FIG. 4, the outer guide 16 (and the inner guide 17) constituting the head 3 has a second long hole 29 communicating with the first long hole 27 of the magazine 4. A guide projection 30 that fits tightly into the guide hole 28 of the magazine 4 is formed in a portion of the lower member 20 of the guide 16 that surrounds the rear portion of the second elongated hole 29. Due to the fitting, the magazine 4 is held at its upper portion so as not to be laterally displaced.
[0027]
As shown in FIG. 3, an upward hook-shaped engaging portion 31 is provided on the rear surface of the lower end of the magazine 4 in a side view, while the engaging portion 31 is provided on a forward protruding portion 32 provided on the lower end of the gas storage portion 8. A guide groove (not shown) which fits from below is formed, and in FIG. 1 and FIG. 3, the locking portion 31 is sandwiched and fixed to the forwardly protruding portion 32 by a screw (not shown) screwed from the opposite side to the paper surface. It has become.
[0028]
At the lower end of the magazine 4, a stopper 33 is provided so as to project on the surface of the work. This is because the fastener 22 is driven in an accurate posture and the burden on the worker is reduced by performing the driving in the state of the two-point support.
[0029]
In this embodiment, the arrangement direction of the connecting fasteners 22 is orthogonal to the axis of the blade 2. However, as disclosed in Patent Document 1, the arrangement direction of the fasteners 22 is inclined with respect to the axis of the blade 2. Is also good.
[0030]
(2). Next, an outline of the inside of the main body 1 will be described with reference to FIG. 5A is a longitudinal side view of the front part of the main body 1 and the head 3, and FIG. 5B is a front sectional view of a state in which members are separated.
[0031]
A cylinder 35 is disposed inside the main body case 5, and a piston (not shown) having the blade 2 is slidably fitted in the cylinder 35. A bush 36 for guiding the blade 2 is mounted outside the front end of the cylinder 35, and a cushion rubber 37 is fitted into the front inside the cylinder 35. An exhaust hole (not shown) is provided in a front portion of the peripheral wall of the cylinder 35, and the combustion gas is discharged from the exhaust hole to the outside of the cylinder 35.
[0032]
Although not shown, a launching lock device is provided inside the main body 1 so that the blade 2 does not advance even if the trigger 9 is simply pulled. Various types of this launching lock device can be adopted. For example, it may be a valve device provided at an appropriate position in a pipe or the like for supplying fuel gas to the cylinder 35. In this case, unless the lock on the valve device is released, the fuel gas cannot be supplied to the cylinder 35 even if the trigger 9 is pulled.
[0033]
An opening 38 for allowing exhaust gas to escape is provided in the front of the main body case 5, and the combustion gas is discharged to the outside from this opening and discharged to the outside of the main body 1 from the ventilation hole 13 of the front cover 12. You.
[0034]
(3). Next, the structure of the head 3 will be described with reference to FIGS. 6 is a plan view in a state where the shroud 18 is broken, FIG. 7 is a sectional view taken along line VII-VII of FIG. 5, FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 5, and FIG.
[0035]
As described above, the head 3 includes the outer guide 16, the inner guide 17, and the shroud 18 made of a metal plate (for example, a steel plate). For example, as can be understood from FIG. 10, the inner guide 17 is formed in a cylindrical shape as a whole so that the blade 2 is slidably fitted therein, and has a third opening with a downward opening through which the fastener 22 passes. Slot 39 is open.
[0036]
As will be described in detail later, a nose 40 for adjusting the driving depth is screwed into the tip of the inner guide 17. The area near the rear end of the inner guide 17 is a small-diameter portion 17a, and therefore, a step 17b is present in the middle along the longitudinal direction. The rear end of the inner guide 17 is a cylindrical portion 17c.
[0037]
A substantially forward portion of the upper member 19 that constitutes the outer guide 16 is a cylindrical portion 19a, and a rear portion thereof has a wide shape. Then, as shown in FIG. 8, the rear end of the upper member 19 is attached to a block portion 41 protruding from the front surface of the cylinder 35 with screws 42, pins, or the like. For example, as shown in FIG. 9, the root portion of the cylindrical portion 19a has a slightly larger diameter, and thus a step portion 19b is present.
[0038]
As shown in FIGS. 5B and 9, the upper member 19 of the outer guide 16 is formed with a fourth elongated hole 43 having a downward opening through which the fastener 22 passes, except for a front portion thereof. The portion forming the fourth elongated hole 43 is notched so that the lower surface thereof is located above the lower surface of the cylindrical portion 19a, and the lower member 20 overlaps the cut portion and is fixed with screws. Have been.
[0039]
As shown in FIG. 9, the upper member 19 of the outer guide 16 is formed with a rectangular fifth long hole 44 penetrating vertically, and a block 45 is slidably fitted into the fourth long hole 44. I have. The block 45 overlaps the small diameter portion 17a of the inner guide 17.
[0040]
On the upper surface of the block 45, an interlocking plate (interlocking member) 46 which forms a part of the safety device is fixed with a screw 48 via a pressing plate 47. Note that the pressing plate 47 may not be provided. The interlocking plate 46 includes a pair of extension portions 46a extending rearward from the outside of the upper member 19, and the distal ends of the extension portions 46a are engaged or abutted with a driving lock member (for example, a valve device). Therefore, when the interlocking plate 46 is moved backward and cut off, the ejection lock is released.
[0041]
The interlocking plate 46 is moved back and forth by a predetermined distance by stroke holding means (not shown), and is pushed forward by a spring (not shown). When the inner guide 17 is retracted, the interlocking plate 46 is also pushed by the block 45 and retracts together against the spring.
[0042]
The nose 40 of the inner guide 17 is exposed from the distal end of the upper member 19 of the outer guide 16, and the nose 40 is barely exposed from the upper member 19 (preferably, the distal end of the nose 40 and the distal end of the cylindrical portion 19a are separated from each other). The launch lock is set so that it is not released unless the user retreats to the state where the surfaces are almost the same.
[0043]
The nose 40 can be picked with a finger. In this case, if the person can hold the nose 40 until the safety device can be retracted to the extent that the lock is released, the safety device becomes meaningless.
[0044]
On the other hand, in the present embodiment, if it is assumed that the nose 40 is to be gripped with the finger to the retreat position where the lock is released, the fingertip must press the tip end surface of the nose 40, and the Your fingertips will be injured and you will be injured. For this reason, it is practically impossible to retract the nose 40 with a finger, so that a safety function can be ensured.
[0045]
The lower member 20 of the outer guide 16 has a plate shape as a whole, and is fixed to the upper member 19 with screws (see FIG. 6). Further, as clearly shown in FIG. 9, the lower member 20 is formed so that the inner guide 17 extends in the groove 50 overlapping from above over the entire length.
[0046]
At the rear of the lower member 20, there is formed a recess 50a in which the cylindrical portion 17c at the rear end of the inner guide 17 fits. The inner guide 17 is held by the recess 50a so that it cannot be pulled forward.
[0047]
The lower member 20 of the outer guide 16 is provided with a projecting portion 20 a extending outside the upper member 19. On the other hand, the interlocking plate 46 is formed with a folded portion 46b that overlaps the overhang portion 20a in plan view.
[0048]
(4). The shroud 18 is formed so as to cover a portion of the outer guide 16 behind the step 19b of the cylindrical portion 19a. Of course, the interlocking member 46 is also covered with the shroud 18. Further, in the present embodiment, since the outer guide 16 is stepped in plan view, the outer diameter of the shroud 18 is also stepwise in plan view according to the shape of the outer guide 16 and the arrangement of the interlocking member 46. Has a different shape.
[0049]
By providing the overhang portion 20a on the lower member 20 of the outer guide 16, care is taken to prevent a person from inserting a finger or a driver between the lower member 20 and the shroud 18.
[0050]
An end plate 51 is integrally provided at the rear end of the shroud 18 by welding or the like, and the end plate 51 is fixed to the front surface of the cylinder 35 with screws 52. In this case, a pair of left and right screw insertion holes are provided slightly below the end plate 51, and are fixed with the two screws 52 inserted therein, and an engagement hole 54 provided at the upper end of the end plate 51 is provided. (See FIG. 5A) is fitted into a pin 55 (substituted with a screw) protruding from the front surface of the main body 1.
[0051]
The upper end of the end plate 51 is not fixed with the screw 52 because the upper end is covered with the shroud 18 and a tool such as a driver cannot be inserted.
[0052]
(5). Nose Next, the form and mounting structure of the nose 40 will be described mainly with reference to FIGS.
[0053]
10A is a side view of the inner guide 17 with the nose 40 attached, FIG. 10B is a cross-sectional view of FIG. 10A taken along line BB, and FIG. 11, (A) is a separated side view, (B) is a front view of the nose 40, (C) is a longitudinal side view of the nose 40, and (D) is a cross-sectional view taken along line DD of (A). FIG. 12 shows an example of the driving state.
[0054]
The distal end of the inner guide 17 has a two-stage diameter difference between the first small diameter portion 17d, which is located on the most distal end and on which the male screw 57 is formed, and the second small diameter portion 17e, which is slightly larger in diameter. Is formed.
[0055]
An outward projection 58 which projects with a very small dimension is formed at the tip of the second small diameter portion 17e, and a portion slightly behind the outward projection 58 is formed at a portion behind the outward projection 58. Four ribs 59 extending in the axial direction at the height are formed at equal intervals in the circumferential direction.
[0056]
On the other hand, the nose 40 is formed to have an outer diameter that is substantially the same as the maximum diameter of the inner guide 17 so that the nose 40 can be slidably fitted to the cylindrical portion 19a of the upper member 19 in the outer guide 16. Further, an annular groove 60 is formed on the outer periphery near the front end, and a portion behind the annular groove 60 is a split portion 40a in which four slits 61 are formed at equal intervals. Therefore, the split portion 40a can be slightly bent and deformed so as to spread radially outward from the base thereof.
[0057]
A female screw 62 screwed into the male screw 57 of the inner guide 17 and a large-diameter portion 63 that fits into the second small-diameter portion 17e of the inner guide 17 are formed on the inner peripheral surface of the split portion 40a of the nose 40. At the rear end of the large-diameter portion 63, an inward projection 64 that projects inward with a small dimension is formed.
[0058]
The inner diameter of the nose 40 at the point of the inward projection 64 is set to substantially the same size as the second small diameter portion 17 e of the inner guide 17. The width of the groove of the slit 61 and the width of the rib 59 are set to be almost the same. A hex hole 65 is formed at the tip of the nose 40 so that a hex wrench can be engaged.
[0059]
The nose 40 can be screwed into a male screw of the inner guide 17 by bending and deforming the split portion 40a. The slit 61 is fitted into the rib 59 at the point of the inward projection 64 in the screwed state, so that the nose 40 is maintained in a state where it is not easily rotated. That is, each time the nose 40 is rotated by 90 degrees, the nose 40 can maintain its rotational position.
[0060]
At the rear of the split blade 40a of the nose 40, an annular score line 66 is formed at an appropriate interval (for example, at an interval of 1 mm) as an example of an indicator. By visually recognizing a state in which the group of the score lines 66 is exposed from the cylindrical portion 19a of the upper member 19, it can be used as a guide when adjusting the driving depth.
[0061]
(6). When the nose 40 is pressed against the work W, the interlocking member 46 is pushed by the inner guide 17 via the block 45 and retreats. In this case, since the retraction stroke of the interlocking member 46 is constant, the position at which the inner guide 17 completely retreats is also constant.
[0062]
On the other hand, since the stroke of the blade 2 is constant, when the nose 40 is moved and adjusted, the relative position between the distal end surface of the blade 2 in the fully advanced state and the distal end surface of the nose 40 in the fully retracted state. The position changes. Thereby, the driving depth of the fastener 22 can be adjusted. FIG. 12 shows a state in which the fastener 22 is driven with the head protruding from the work W.
[0063]
When the head of the fastener 22 is driven into the work W so as to sink into the work W (when the head is deeply driven), the nose 40 is screwed into the inner guide 17 deeper than the state shown in FIG. May reach the surface of the work W.
[0064]
Since the nose 40 is exposed to the outside, even when the interlocking member 46 is completely surrounded by the shroud 18, the driving depth is easily and accurately adjusted only by rotating the nose 40 exposed to the outside. be able to.
[0065]
In this embodiment, the driving depth can be adjusted by 寸 法 of the pitch of the male screw 57 and the female screw 62 (by 0.25 mm if the pitch is 1 mm). In addition, the sliding means of the nose 40 can be regulated by the stopper means including the outward projection 58 and the inward projection 64, and the nose 40 can be prevented from falling off. Note that other stopper means may be employed.
[0066]
The holding means for allowing the nose 40 to rotate and not easily rotate is not limited to the combination of the slit 61 and the rib 59 as in the embodiment, but may be a variety of means such as one using a ball or a leaf spring. Can be adopted. However, according to the configuration of the present embodiment, there is an advantage that the structure is simplified because other members are not required.
[0067]
The slits 61 and the ribs 59 are not necessarily arranged at 90-degree intervals, but can be set at any intervals, such as 120-degree intervals. The slits 61 may be formed at four locations and the ribs 59 may be formed at only two locations, for example, the numbers of both may be different.
[0068]
When the nose 40 is provided with a wrench engaging means such as a hexagonal hole 65, there is an advantage that the adjustment operation can be performed lightly while preventing the nose 40 from unexpectedly rotating from the set state. As the wrench engaging means, the outer diameter of the tip of the nose 40 may be a hexagon or the like.
[0069]
Providing an index means for visually confirming the moving distance of the nose 40 provides an advantage that the adjustment operation can be performed accurately and quickly because it is clear at a glance how much adjustment should be made. In this case, if the score line 66 is employed as the index means, it is sufficient to simply engrave, so that there is an advantage that the processing becomes extremely simple.
[0070]
(7). Others The present invention can be embodied in various ways other than the above-described embodiment. For example, in the above embodiment, the nose is screwed into the tip of the inner guide from outside, but the nose may be screwed into the tip of the inner guide from inside (that is, a female screw is formed in the inner guide, and a male screw is formed in the nose). May be formed).
[0071]
Further, in the present embodiment, the nose is provided on the movable inner guide. However, in the case of a driving tool which performs the guide of the blade and the fastener with one fixed guide body, the nose is provided at the tip of the fixed guide body. Just do it. In the case of the type of Patent Document 2, it is possible to configure the nose with two members screwed together.
[0072]
Further, the present invention can be applied not only to a gas-fired type driving tool but also to other types of driving tools such as a pneumatic type and an electromagnetic type.
[Brief description of the drawings]
FIG. 1 is an overall side view of a driving tool according to an embodiment.
FIG. 2 is a perspective view seen from the front.
FIG. 3 is a side view in a state where a magazine is removed from a main body.
4A is a perspective view of the head 3 in an upside down state, and FIG. 4B is a perspective view of an upper portion of the magazine 4. FIG.
5A is a vertical side view of a front portion of a main body and a head, and FIG. 5B is a cross-sectional view of FIG.
FIG. 6 is a plan view in a state where a shroud is broken.
7 is a sectional view taken along line VII-VII of FIG.
8 is a sectional view taken along line VIII-VIII of FIG.
FIG. 9 is an exploded perspective view.
10A is a side view of the inner guide with the nose attached, FIG. 10B is a cross-sectional view of FIG. 10A taken along line BB, and FIG. 10C is a cross-sectional view of FIG. It is.
11A is a separated side view, FIG. 11B is a front view of the nose, FIG. 11C is a longitudinal side view of the nose, and FIG. 11D is a cross-sectional view of FIG.
FIG. 12 is a diagram illustrating an example of a driving state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Blade 3 Head 9 Trigger 16 Outer guide 17 Inner guide 18 Shroud 19 Upper member 22 which constitutes an outer guide 22 Connection fastener 40 Nose 46 Interlocking member 57 which forms a part of safety device Male screw 59 Rib 61 which constitutes stopper means Stopper means Slit 62 female screw

Claims (2)

A main body having a built-in rod-shaped blade for driving a fastener, a magazine for supplying the fasteners one by one in front of the blade, and a probe or a guide that retreats when pressed against a work, comprising: At the tip, a nose for adjusting the driving depth that can move in the axial direction of the blade is attached,
Driving tool. It has a main body with a built-in rod-shaped blade for driving the fastener, a tubular and sliding inner guide for guiding the forward movement of the blade, and an outer guide for slidably holding the inner guide,
The distal end of the inner guide is exposed from the distal end of the outer guide, and by retreating the inner guide, an interlocking body for releasing the driving lock of the blade is configured to retreat together. A driving tool that is surrounded by a shroud so that it cannot be operated,
A nose for driving depth is screwed into the tip of the inner guide, and the dimension of the nose exposed forward from the outer guide is set to approximately the same as the stroke required to release the driving lock. ing,
Driving tool.

Images