JP2010261428A - Antitheft mechanism for portable working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antitheft mechanism for a portable working machine covering a recessed groove housing a lifting lug at an upper surface of a hood by a cover plate which can be locked. <P>SOLUTION: The lifting lug 25 locking a hook of a crane is housed in the groove 20 formed on a top plate 11 of the hood, and an upper part of the recessed groove at a holding location of the lifting lug is covered by the cover plate 50. The cover plate is formed a little bit narrower than width of the recessed groove, and can be fitted in the recessed groove. Both ends in a width direction of the cover plate are locked by guide rails 6 attached to the sidewall upper part of the recessed groove. The cover plate slides in a longitudinal direction of the groove and moves between a close position covering the upper part of the lifting lug and an open position shifting from the upper part of the lifting lug. A partition wall 70 partitioning an inside of the recessed groove is disposed below one end 50a of the cover plate at the close position. The cover plate is locked to the partition wall by the locking means at the close position to be disabled to slide, and lifting of the working machine by the lifting lug is disabled. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an anti-theft mechanism for a portable work machine, and more specifically, an engine-driven generator in which a work machine body such as a generator, an engine that drives the work machine, and other necessary equipment are housed in a bonnet. In the portable work machine of this type, the portable work machine is designed to prevent theft by making it impossible to lift the portable work machine by making it impossible to lock the crane hooks etc. The present invention relates to an anti-theft mechanism for work machines.

  Portable work machines such as engine-driven generators and compressors used in construction work and civil engineering work, such as generators and compressors, etc. The engine that drives the engine and other components are placed on a common stand, and this is covered with a bonnet and packaged.

  In such a portable work machine, a suspension bracket for locking a crane hook or the like is provided on the upper surface of the bonnet so that it can be easily lifted by the crane during movement or installation. Has been.

  In addition, when such a portable work machine is moved and mounted on a truck bed, a rope for fixing it is attached to the bonnet so that the portable work machine can be stably fixed on the bed. The rope hanging bracket is also provided on the upper surface of the bonnet at the end of the portable work machine in the width direction.

  While the portable work machine configured as described above is expensive, it increases the chances of being stolen because it remains on the construction site even at night or on holidays when work is not being performed. ing.

  Therefore, as a theft prevention mechanism to prevent such theft, the thief can prevent the hooks of the crane on the top of the bonnet of the portable work machine from being locked unless necessary. It has also been proposed to prevent a portable work machine from being lifted.

  As an example of such an anti-theft mechanism 500, as shown in FIG. 13, two upper portions of a concave groove that bisects the upper surface of the bonnet 510 are covered with bridging plates 511 a and 511 b that are continuous with the top plate 511. A rectangular central recess 520 in plan view is formed at the center, and end recesses 530 are formed at both ends in the width direction on the upper surface of the bonnet 510, and the suspension fitting 525 is accommodated in the central recess 520, and the end recess 530 The rope hook 535 is accommodated, and one of the central recess 520 and the end recess 530 is covered with a common cover plate 550, and the cover plate 550 is locked using a padlock 552 or the like so that it cannot be removed. There is one designed to prevent theft (FIG. 2 of Patent Document 1 and FIG. 11 of Patent Document 2).

  Further, as shown in FIG. 14, by locking one side portion of a lockable lid plate 550 that closes the central recess 520 having the same configuration to one side wall of the central recess 520 by a hinge 554 so as to be rotatable. An anti-theft mechanism 500 has also been proposed that makes it impossible to lift a portable work machine using a suspension fitting 525 provided in the central recess 520 when the cover plate 550 is locked (see Patent Document 2 “0030” column and FIG. 21).

Utility Model Registration No. 3089170 JP 2005-325844 A

  In the conventional anti-theft mechanism 500 configured as described above, the anti-theft mechanism 500 described with reference to FIG. 13 is provided with a tip step 551 at one end 550a of the cover plate 550, and this tip step 551 is inserted under the bridge plate 511a between the central recess 520 and one end recess 530, and the upper and side portions of the end recess 530 are connected to the other end 550b side of the lid plate 550 bent in an L shape. The cover plate 550 is configured so that the cover plate 550 cannot be removed by locking the hook of the padlock 552 to the rope hook 535 through the long hole 555 provided in the other end 550b of the cover plate 550. The portable work machine cannot be suspended.

  However, in the antitheft mechanism 500 configured in this way, for example, when the use of the portable work machine at a certain construction site is finished and moved to another construction site, the portable work machine When it is necessary to suspend the portable work machine due to movement or the like, the above-described cover plate 550 is removed, and after completion of the suspension or movement, the cover plate 550 is mounted again. It is necessary to store the cover plate 550 until the cover plate 550 is complicated, and the cover plate 550 is often lost due to misplacement at the previous site or other materials.

  In many cases, the removed cover plate 550 is temporarily placed on the top plate 511 of the bonnet 510 and forgotten, and a sharp corner formed by a steel plate or the like when the portable work machine is lifted or transported. If the cover plate 550 having a portion falls from the bonnet 510, there is a risk of an accident, and even if it does not lead to an accident or the like, problems such as loss, breakage, deformation, etc. due to the drop of the cover plate 550 occur. ing.

  Furthermore, in the anti-theft mechanism 500 having the above-described configuration, the cover plate 550 used here covers one of the central recess 520 and the end recess 530 at the same time. As a result, the cover plate 550 has a width. The length is long.

  Therefore, in such a cover plate 550, when a tip of a sharp tool such as a bar is inserted into the back surface of the intermediate position in the longitudinal direction of the cover plate 550 and lifted with the bar as an insulator, the intermediate position in the longitudinal direction is obtained. For example, in the example shown in FIG. 13, it is formed narrower than the other parts, but is easily deformed by being bent from the part X not reinforced by the flange 556.

  However, in the cover plate 550 having the structure shown in FIG. 13, the back surface of the cover plate 550 rides on the upper surface of the bridging plate 511b between the central recess 520 and the end recess 530 in the longitudinal direction. The gap δ1 between the upper surface of the bridging plate 511b and the bottom surface of the lid plate 550 is enlarged by shaking the lid plate 550 by hand even in the locked state due to the play of the long hole 555 into which the hook of the padlock 552 is inserted. For this reason, even if the locked cover plate 550 cannot be removed by normal usage, if it is attempted to pry it open by inserting, for example, the tip of a bar into the gap δ1, the cover plate 550 may be deformed. Since the central recess 520 covered with the cover plate 550 can be opened by causing damage, the risk of being stolen has not yet been resolved.

  On the other hand, as in the anti-theft mechanism 500 described with reference to FIG. 14, in the configuration in which one side of the cover plate 550 is rotatably attached to the inner wall of the central recess 520 by the hinge 554, the cover plate 550 is rotated. Even when the central recess 520 is opened, the cover plate 550 maintains the state of being connected to the bonnet 510, so there is no trouble of storing the removed cover plate 550, and the cover plate 550 is lost or dropped due to the misplacement of the cover plate 550. Accident, damage, deformation, etc. due to

  However, when one side of the cover plate 550 is connected to the inner side wall of the central recess by the hinge 554, the opening plate of the central recess 520 is connected with the opening edge of the central recess 520 in order to rotate the cover plate 550 without interfering with the opening edge of the central recess 520. It is necessary to provide a relatively large gap δ2 between the outer peripheral edge of the lid plate 550, and as a result, the tip of the bar can be inserted into the gap δ2 and can be opened.

  Further, in the configuration shown in FIG. 14, the lid plate 550 is placed on the upper surface of the bonnet 510 adjacent to the central concave portion 520 when the central concave portion 520 is opened (see FIG. 14B), In addition to hindering the work of attaching the hook of the crane to the suspension bracket 525, for example, when storing portable work machines in a two-stage stack, other portable types can be placed on the top with the cover plate 550 open. When the work machines are to be stacked, the cover plate 550 becomes an obstacle, and the cover plate 550 may be damaged or deformed by contacting the bottom or legs of the portable work machine stacked on the upper stage.

  Therefore, an object of the present invention is to solve the above-mentioned drawbacks of the prior art, and even when the lid plate is left attached to the bonnet when opened, it does not interfere with the lifting work. By performing the work with the plate attached to the bonnet, it is possible to prevent loss due to removal of the cover plate, and also to prevent the cover plate from being opened using a bar or the like as described above. An object of the present invention is to provide a theft prevention mechanism for a portable work machine that does not obstruct the cover plate even when the portable work machines are stacked, and does not cause breakage or deformation of the cover plate.

In order to achieve the above object, the anti-theft mechanism 1 of the portable work machine according to the present invention forms a concave groove 20 that is recessed with respect to the upper surface of the bonnet 10 on the upper surface of the bonnet 10 that houses the components. A lid plate 50 is provided in the concave groove 20 to cover the concave groove 20 so that the concave groove 20 is openable and closable at an upper portion of the housing position of the hanging bracket 25. In a theft prevention mechanism of a portable work machine provided with a locking means that locks the groove 20 so that it cannot be opened,
The lid plate 50 is formed in a rectangular shape having substantially the same width as the concave groove 20 so as to be fitted in the concave groove,
Guide rails 60 for locking both ends in the width direction of the cover plate 50 are provided on the inner surface of the side wall on the upper end side of the concave groove 20, respectively. The lid plate 50 can be slid in the longitudinal direction of the concave groove 20 between a closed position that covers the groove 20 and an open position that opens the upper portion of the hanging metal fitting 25, and in a direction orthogonal to the longitudinal direction of the concave groove. Restricting the movement of the lid plate 50;
A partition wall 70 that partitions the inside of the groove 20 in the width direction is provided below the one end 50a in the longitudinal direction of the lid plate 50 in the closed position, and the one end 50a side of the lid plate 50 is locked to the partition wall 70. Then, the locking means (lock 55, latch 56, latch receiver 52) for locking the lid plate 50 in the non-slidable position at the closed position is provided (Claim 1).

In the anti-theft mechanism 1 having the above configuration,
A first locking piece 61 projecting from the inner surface of each side wall of the groove 20 toward the center in the width direction of the groove 20 with a predetermined width in the horizontal direction;
From each of the inner surfaces of the side walls of the concave groove 20, it protrudes with a predetermined width in the horizontal direction toward the center side in the width direction of the concave groove 20, and has a slightly wider interval s 1 with respect to the thickness of the lid plate 50. The guide rail 60 is formed by a second locking piece 62 arranged in parallel on the first locking piece 61 via
The cover plate 50 can be slidably locked by fitting both ends of the cover plate 50 in the width direction into the gap s1 between the first lock piece 61 and the second lock piece 62. (Claim 2).

In the configuration in which the guide rail 60 is formed by the first and second locking pieces 61 and 62 as described above, a pair of erected from the bottom wall 40b and two sides forming the longitudinal direction of the bottom wall 40b. A channel member 40 having a substantially U-shape with a cross-section in the width direction opened upward is attached to the back surface of the top plate 11 of the bonnet 10 to form the concave groove 20.
A section 63a of the L-shaped plate 63 whose longitudinal direction is the longitudinal direction of the recessed groove 20 is attached to the inner surface of the side wall of the recessed groove 20 by forming a cross-section in the width direction in an inverted L shape. The first locking piece 61 is formed by the piece 63b,
The top plate 11 of the bonnet 10 at least at the upper part of the housing position of the hanging metal fitting 25 of the concave groove 20 is formed with openings 21 and 21 'formed narrower than the width of the concave groove 20, The top plate 11 at the edge of the openings 21 and 21 ′ may be protruded by a predetermined width onto the concave groove, whereby the second locking piece 62 may be formed by the top plate 11 at the protruding portion. Item 3, Example 1; see FIGS.

Similarly, in the anti-theft mechanism 1 provided with the guide rail 60 provided with the first and second locking pieces 61, 62, the cross section in the width direction has an inverted L shape, and the longitudinal direction of the groove 20 is A first L-shaped plate 63 ′ as a longitudinal direction;
Each of the cross sections in the width direction has an inverted L shape, and a second L-shaped plate 64 having the longitudinal direction of the groove 20 as the longitudinal direction is provided.
The one piece 63a ′ of the first L-shaped plate 63 ′ with the one piece 64a of the second L-shaped plate 64 sandwiched between the one piece 63a ′ of the first L-shaped plate 63 ′ and the inner wall of the concave groove 20; The first locking piece 61 is formed by the other piece 63b ′ of the first L-shaped plate 63 ′ by attaching the one piece 64a of the second L-shaped plate 64 together to the inner surface of the side wall of the concave groove 20. The second locking piece 62 may be formed by the other piece 64b of the second L-shaped plate 64 (see claim 4, embodiment 2; see FIGS. 4 to 6).

Further, as another configuration of the anti-theft mechanism 1 of the present invention, a locking piece 65a disposed in parallel with the inner surface of each side wall of the concave groove 20 with a predetermined interval s2 is provided on the upper part in the concave groove 20. Each is provided, and the guide rail 60 is formed by the locking piece 65a,
A fitting wall 53 projecting downward is provided on each of two sides of the lid plate 50 in the width direction, and the fitting wall 53 of the lid plate 50 is fitted into the gap s2, respectively.
A lid plate side guide hole 66 whose longitudinal direction is the sliding direction of the lid plate 50 is formed in the fitting wall 53 of the lid plate 50, and is formed from the locking piece 65 a on one end 50 a side on the partition wall 70 side. The protruding guide pin 68a is loosely fitted in the lid plate side guide hole 66, and
A locking piece side guide hole 67 whose longitudinal direction is the sliding direction of the cover plate 50 is formed in the locking piece 65a, and protrudes from the fitting wall 53 on the other end 50b side of the cover plate 50 with respect to the one end 50a. The guide pin 68b may be loosely fitted into the locking piece side guide hole 67 (Claim 5, Example 3; see FIGS. 7 to 10).

In the anti-theft mechanism 1 having the above-described configuration, a horizontal wall (intermediate horizontal wall) 65b that protrudes from the lower end of the locking piece 65a toward the side wall of the groove is provided, and a guide roller 69a that makes the outer periphery contact the horizontal wall 65b. Is rotatably supported on the guide pin 68b protruding from the fitting wall 53 of the lid plate 50 (see FIG. 10A),
The guide roller 69b that contacts the bottom surface and the outer periphery of the cover plate 50 may be rotatably supported on the guide pin 68a protruding from the locking piece 65a (see FIG. 10B) (see FIG. 10B). Claim 6, Example 3).

  With the configuration of the present invention described above, in the portable working machine equipped with the anti-theft mechanism 1 of the present invention, when the concave groove 20 in the accommodation position of the hanging bracket 25 is opened, the lid plate 50 is attached to the hanging bracket 25. The lid plate 50 is not obstructed when the operation of locking the hook of the crane to the hanging bracket 25 is performed, and the groove 20 is opened at the upper portion of the hanging bracket 25. Even when another portable work machine or the like is loaded on the top plate 11 of the bonnet 10, the lid plate 50 does not get in the way, and the lid plate 50 can be placed on the upper stage. It was suitably prevented from being crushed and damaged by a portable work machine.

  Even when the cover plate 50 is left attached to the top plate 11 of the bonnet 10, the cover plate 50 does not interfere with the hooking of the crane or the like to the hanging bracket 25. The lifting work can be performed while the plate 50 is attached to the bonnet 10 without completely removing the plate 50 from the bonnet 10. As a result, it is not necessary to store the cover plate 50 when the hanging bracket 25 is used. Not only is there no risk of loss, but it is also possible to prevent accidents, breakage, deformation, etc. caused by dropping of the cover plate 50 caused by leaving the removed cover plate on the top of the bonnet.

  Furthermore, since the cover plate 50 is configured to slide in the groove 20, the gap between the long side of the cover plate 50 and the inner surface of the side wall of the groove is larger than the gap necessary to enable the cover plate 50 to slide. Therefore, it is possible to employ a configuration in which the width of the cover plate 50 is formed to be substantially the same as the width of the groove.

  As a result, there was no gap between the lid plate 50 and the inner surface of the side wall of the concave groove 20 so that the tip of the bar could be inserted, and it was possible to prevent the lid plate 50 from being opened using the bar or the like.

  The guide rail 60 includes the first locking piece 61 and the second locking piece 62 described above, and both end portions in the width direction of the cover plate 50 are fitted between the first locking piece 61 and the second locking piece 62. In the case of the configuration, the second locking piece 62 covers the boundary between the two sides (two long sides) forming both ends of the lid plate 50 in the width direction and the inner surface of the side wall of the groove. It becomes impossible to insert a bar tip between the inner wall 50 and the inner surface of the side wall of the groove.

  Further, since the cover plate 50 is formed wider than the interval between the second locking pieces 62, it is extremely difficult to peel the cover plate 50 upward through this interval, which makes it possible to achieve the present invention. The anti-theft performance of a portable work machine equipped with an anti-theft mechanism could be further improved.

  The first locking piece 61 of the guide rail 60 is configured such that one piece 63a (or 63a ′) of the L-shaped plate 63 (or 63 ′) whose cross-section in the width direction forms an inverted L shape is the inner surface of the side wall of the groove 20. And the other piece 63b (or 63b ′) of the L-shaped plate 63 (or 63 ′) can be easily formed as the first locking piece 61.

  In addition, the second locking piece 62 of the guide rail 60 is provided with a channel material 40 on the back surface of the top plate 11 of the bonnet 10 to form a concave groove 20, and a concave plate is formed on the top plate covering the upper portion of the channel material 40. By forming the openings 21 and 21 ′ narrower than the groove 20, the edges of the openings 21 and 21 ′ are protruded into the recessed groove 20, so that the top plate 11 of the protruding portion is connected to the second engagement member. It could be easily formed by using the stop piece 62.

  Alternatively, in addition to the L-shaped plate (first L-shaped plate 63 ′), a second L-shaped plate 64 whose cross section in the width direction forms an inverted L-shape is provided, and a piece 64a of the second L-shaped plate 64 is replaced with the first L By attaching both sides 63a 'and 64a of the L-shaped plates 63' and 64 to the inner wall of the recessed groove 20 while being sandwiched between the one piece 63a 'of the shaped plate 63' and the inner surface of the side wall of the recessed groove 20, The second locking piece 62 could be easily formed by the other piece 64b of the plate 64.

  Note that a locking piece 65a that is parallel to the inner wall of the recessed groove 20 is provided, a locking piece side guide hole 67 is provided in the locking piece 65a, and the guide pin 68b that protrudes from the fitting wall 53 of the lid plate 50 is provided with the guide pin 68b. By loosely fitting into the locking piece side guide hole 67, and loosely fitting the guide pin 68a protruding from the locking piece 65a into the lid plate side guide hole 66 provided in the fitting wall 53 of the lid plate 20. Accordingly, the cover plate 50 can be easily slid in the longitudinal direction of the guide holes 66 and 67 by the guide pins 68a and 68b and the guide holes 66 and 67, and the cover plate 50 can be guided by the guide pins 68a and 68b. By engaging the guide holes 66 and 67 with the guide holes 66 and 67, the lid plate 50 cannot be peeled upward from the concave groove 20, and it is difficult to perform the opening using a bar or the like.

  In the configuration in which the guide rollers 69a and 69b are rotatably supported on the guide pins 68a and 68b, the cover plate 50 can be smoothly slid without resistance by the guide rollers 69a and 69b. .

FIG. 3 is a plan view of an antitheft mechanism according to the first embodiment. It is the II-II sectional view taken on the line of Drawing 1, (A) shows the state where a lid plate is in a closed position, and (B) shows the state where a lid plate is in an open position, respectively. It is sectional drawing of the antitheft mechanism of Example 1, (A) is the sectional view on the AA line of FIG. 2 (A), (B) is the sectional view on the BB line of FIG. 2 (A). The top view of the antitheft mechanism of Example 2. FIG. FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 4, where (A) shows a state where the cover plate is in the closed position, and (B) shows a state where the cover plate is in the open position. It is sectional drawing of the antitheft mechanism of Example 2, (A) is the sectional view on the AA line of FIG. 5 (A), (B) is the sectional view on the BB line of FIG. 5 (A). FIG. 6 is a plan view of a theft prevention mechanism according to a third embodiment. FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7, (A) shows a state where the cover plate is in the closed position, and (B) shows a state where the cover plate is in the open position. It is sectional drawing of the antitheft mechanism of Example 3, (A) is the sectional view on the AA line of FIG. 8 (A), (B) is the sectional view on the BB line of FIG. 8 (A). It is an expanded sectional view which shows the engagement state of the locking piece of the antitheft mechanism of Example 3, and a fitting wall, (a) is a sectional view on the aa line of FIG. 8 (A), (B) is a figure. BB sectional drawing of 8 (A). The whole perspective view of a portable work machine. The whole perspective view of a portable work machine. It is the conventional antitheft mechanism (patent document 1), (A) is a perspective view, (B) Front sectional drawing of the attachment state of a cover board. It is the conventional antitheft mechanism (patent document 2), (A) is a top view, (B) is a BB line sectional view of (A).

  Next, the antitheft mechanism 1 in the portable work machine of the present invention will be described with reference to the accompanying drawings.

[Structure of portable work machine]
A portable work machine 6 to which the antitheft mechanism 1 of the present invention is applied includes a work machine body such as a generator body and a compressor body, an engine that drives the work machine body, a fuel tank that supplies fuel to the engine, Other components are placed on a gantry, and the gantry 10 covers the gantry 10 to form a package for easy movement and transportation (see FIGS. 11 and 12).

  In the portable work machine 6 shown in FIGS. 11 and 12, for convenience of explanation, the structure of the cover plate 50, the guide rail 60, the partition wall 70, the locking means, etc., which will be described later, constituting the anti-theft mechanism 1 of the present invention is as follows. Omitted.

  A concave groove 20 is formed on the upper surface of the bonnet 10 of the portable work machine 6 by attaching a channel member 40 whose longitudinal direction is the width direction or the longitudinal direction of the bonnet 10 (the width direction in the illustrated example). In addition, a hanging metal fitting 25 for locking a crane hook or the like is attached in the concave groove 20.

  In the illustrated example, the hanging bracket 25 is attached to the center in the longitudinal direction of the groove, but the attachment position of the hanging bracket 25 is shifted from the center of the groove corresponding to the center of gravity of the portable work machine 6. It may be attached at a different position.

  Rope hooks 35 and 35 for attaching ropes for fixing the portable work machine 6 on the loading platform of the truck when the portable working machine 6 is loaded on the loading platform or the like are respectively attached to the end portions of the concave grooves 20.

  In the portable work machine 6 shown in FIG. 11, a channel member 40 having substantially the same length as the width of the bonnet 10 and having an approximately U-shape opening upward in a cross section in the width direction is provided as a portable work machine. The above-mentioned concave groove 20 is formed by attaching to the back surface of the top plate 11 of the bonnet 10 with the width direction as the length direction.

  Then, a rectangular opening 21 is provided in the top plate 11 at an upper portion of the channel member 40 at the attachment position of the above-described suspension member 25 to open the suspension member 25 in the channel member 40 (concave groove). On the other hand, a hook of a crane can be locked.

  In addition, a rectangular notch 31 is provided in the top plate 11 at a portion located at the upper part of the rope hanging bracket 35 so that the rope can be hung on the rope hanging bracket 35.

  In the example shown in FIG. 11, the opening 21 provided in the top plate 11 of the bonnet 10 is formed to have a predetermined length in the width direction of the bonnet 10, and the gap between the opening 21 and the notch 31 is formed. In this embodiment, the bridge plates 11a and 11b formed integrally with the top plate 11 are provided so that the upper portion of the groove 20 is partially blocked by the bridge plates 11a and 11b. Instead of the opening 21, a slit-shaped opening 21 ′ as shown by a broken line in FIG. 11 is formed on the top plate 11 of the bonnet 10 on the concave groove 20, and is covered by the top plate 11 over the entire length thereof. It is also possible to form a concave groove 20, and in this configuration, by attaching a plate material provided as a separate member from the top plate 11, for example, the bridging plates 11a and 11b are attached as in FIG. Groove provided 0 may be formed.

  A configuration example of the anti-theft mechanism corresponding to the portable work machine 6 having the configuration shown in FIG. 11 will be described later as first and second embodiments.

  On the other hand, in the portable work machine 6 shown in FIG. 12, the top plate 11 divided into two in the longitudinal direction of the bonnet 10 is connected via a channel material 40 having a substantially U-shape opening upward. The above-described concave groove 20 is formed on the upper surface of the bonnet 10 by attaching the side surfaces of the top plates 11 and 11 divided into two in the longitudinal direction of the bonnet 10 to the outer surfaces of the side walls 40a and 40a of the 40. Yes, the hanging bracket 25 can be used by attaching the hanging bracket 25 to the central portion in the longitudinal direction of the concave groove 20 formed by the channel material 40 and attaching the rope hanging bracket 35 to both ends of the concave groove 20. The portable work machine 6 can be lifted, and when the portable work machine 6 is loaded on a truck bed or the like, it is attached to the rope bracket 35. And it is configured so as to be able to apply a flop.

  In the configuration shown in FIG. 12, unlike the configuration described with reference to FIG. 11, there is no configuration corresponding to the bridging plates 11 a and 11 b that cover the upper part of the groove 20, but the configuration shown in FIG. 12. In this case, a plate material or the like corresponding to the bridge plates 11a and 11b may be attached so as to partially cover the upper portion of the groove 20.

  A configuration example of the anti-theft mechanism 1 for the portable work machine 6 having the configuration shown in FIG. 12 will be described later as a third embodiment.

  In the example shown in FIG. 11, the hanging metal fitting 25 housed in the groove 20 has a width corresponding to the width of the groove 20 and a height formed lower than the depth of the groove 20. The rectangular plate is formed as an inverted U-shaped notch, and both ends in the width direction of the hanging metal fitting 25, which is a rectangular plate, are welded to the inner surface of the side wall of the concave groove 20, and the lower end is formed on the concave groove 20. Although it is fixed to the bottom wall by welding or the like, also in the structure of the bonnet 10 shown in FIG. 11, the metal rod bent in an inverted U shape shown in FIG. The hanging bracket 25 may be formed by welding, or the hanging bracket having the structure shown in FIG. 11 may be adopted in the bonnet 10 having the configuration shown in FIG. If so, the shape of the hanging bracket used is limited to the example shown in the figure. No.

  Further, in the illustrated example, a rope metal fitting 35 is formed by bending a metal rod of a predetermined length so that it is slightly acute than a right angle at a substantially central portion in the length direction and is formed in a substantially L shape. , By welding one straight portion 35a of the rope hanging bracket 35 to the bottom wall of the concave groove, the rope is hung on the other straight portion 35b whose upper end is slightly inclined toward the center side of the portable work machine. (See FIG. 2A).

  By configuring the rope hanging bracket 35 as described above, when the rope hung on the rope hanging bracket 35 is stretched laterally or downward, the rope is locked to the rope hanging bracket 35. However, when this rope is pulled upward, the rope comes off from the rope hanging bracket 35. As a result, the rope hanging bracket 35 can be attached to a portable work machine mounted on a truck bed or the like. Although it can be used effectively when it is fixed on the loading platform, it cannot be used for lifting the portable work machine 6, so that the rope hanging bracket 35 can be accommodated in order to prevent theft. It is unnecessary to provide a cover plate or the like that closes the concave groove 20.

  However, the rope bracket 35 is not limited to the illustrated configuration as long as the portable work machine cannot be suspended using a rope or the like, and various types of structures can be adopted. For example, one end of a metal rod may be welded to the bottom wall 40b of the channel member 40 and attached in a vertical shape, and this may be used as the aforementioned rope hanging bracket 35.

  11 and 12, the channel material 40 (concave groove 20) is provided in the width direction of the bonnet 10. However, the arrangement direction of the channel material 40 (concave groove 20) is not limited to this direction. For example, it may be provided in a direction (longitudinal direction of the bonnet 10) perpendicular to the illustrated direction.

[Anti-theft mechanism]
Common Structure The anti-theft mechanism 1 of the present invention provided in the bonnet 10 of the portable work machine 6 configured as described above is suspended in the concave groove 20 formed by attaching the channel member 40 or the like as described above. The metal fitting 25 is accommodated, and the groove 20 is covered with the cover plate 50 at the position where the suspension metal fitting 25 is accommodated. It is something that cannot be done.

  Then, the lid plate 50 is closed from the closed position (the position shown in FIGS. 2A, 5A, and 8A) covering the suspension fitting 25 and from above the suspension fitting 25. It is possible to slide in the longitudinal direction of the concave groove 20 between the open positions (positions shown in FIGS. 2B, 5B, and 8B) where the plate has moved, so that the above-mentioned in the closed position. As described above, the crane hook or the like cannot be locked to the hanging metal fitting, while the hanging metal fitting 25 is locked to the crane hook or the like in the open position so that it can be lifted.

  In order to enable such sliding of the cover plate 50, in the anti-theft mechanism 1 of the present invention, the cover plate 50 is formed in a rectangular shape that is slightly narrower than the width of the concave groove 20. By forming the cover plate 50, the cover plate 50 can be fitted into the groove 20, and the cover plate 50 can be slid in the longitudinal direction of the groove 20 described above. Both ends of the lid plate 50 in the width direction are locked to guide rails 60 provided in the concave groove 20 so that the movement of the lid plate 50 in the direction orthogonal to the vertical direction is restricted.

  Further, a partition wall 70 for partitioning the groove 20 in the width direction is provided on one end 50a side in the longitudinal direction of the lid plate 50 in the closed position, and the partition wall 70 and the one end 50a side of the lid plate 50 are connected to each other. Locking means comprising a lock 55, a latch 56, a latch receiver 52, and the like that are engaged to prevent the lid plate 50 from sliding in the closed position.

Example 1
(1) Structure of concave groove As described above, the first embodiment of the anti-theft mechanism 1 of the present invention in which the cover plate 50 is slidable in the longitudinal direction in the concave groove 20 is based on FIGS. explain.

  The anti-theft mechanism 1 shown in FIGS. 1-3 is a structural example with respect to the bonnet 10 of the portable work machine 6 provided with the structure demonstrated with reference to FIG. 11 as mentioned above, The bottom wall 40b, the said bottom wall A channel member 40 having a pair of side walls 40a and 40a erected from two sides forming the longitudinal direction of 40b and having a substantially U-shaped cross section opening upward is attached to the back surface of the top plate 11 of the bonnet 10. Thus, the concave groove 20 is formed.

  In order to enable the channel member 40 to be attached to the back surface of the top plate 11, the channel member 40 of this embodiment includes flange portions 40c and 40c that protrude outward from the upper ends of the side walls 40a and 40a, respectively. The flange portions 40 c and 40 c are attached to the bonnet 10 in a state where the flange portions 40 c and 40 c are in contact with the back surface of the top plate 11 of the bonnet 10.

  In the concave groove 20 formed in the channel member 40, the hanging metal fitting 25 and the rope hanging metal fitting 35 are attached as described above, and the top plate 11 is located above the attachment position of the above-mentioned hanging metal fitting 25. The aforementioned opening 21 that opens the upper portion of the groove 20 is formed.

  In addition, a notch 31 is formed in a portion from the top plate 11 of the bonnet 10 to the side wall 12 in the upper portion of the housing position of the rope hook 35 with respect to the inside of the concave groove 20, and the rope hook 35 is formed through the notch 31. While being configured to be able to hang a rope, on the upper surface of the concave groove 20, the portions indicated by reference numerals 11a and 11b between the positions where the opening 21 and the notch 31 are formed without providing an opening or notch, It remains as a bridging plate that bridges the upper ends of the grooves 20.

  The bridge plates 11a and 11b are not essential in the anti-theft mechanism of the present invention, and the bridge plates 11a and 11b may not be provided.

(2) Guide rail In this embodiment, a guide rail 60 that locks a cover plate 50 (described later) in the groove 20 and allows the cover plate 50 to slide in the longitudinal direction of the groove 20 is a groove. The first locking piece 61 projecting with a predetermined width in the horizontal direction from the respective side walls of the 20 and the first locking piece 61 are formed on the first locking piece 61 so as to have a predetermined margin portion wider than the thickness of the lid plate 50. A second locking piece 62 arranged in parallel with the interval s1 is provided, and both ends of the lid plate 50 in the width direction are inserted into the interval s1 formed between the first and second locking pieces 61, 62. By doing so, the lid plate 50 can be slid in the above-mentioned direction, and the lid plate 50 cannot be moved or removed in a direction (for example, upward) perpendicular to the longitudinal direction of the groove 20. Locked.

  Of these, the first locking piece 61 is formed by bending a steel plate in this embodiment, and the L-shaped plate 63 formed in a substantially inverted L shape in the cross section in the width direction is placed in the groove 20. A piece 63a that forms the vertical direction of the aforementioned L-shaped plate 63 having a total length slightly longer than the total length of the aforementioned opening 21 formed on the top plate 11 of the bonnet 10 is attached horizontally. The concave groove 20 is formed so that the upper surface of the other piece 63b that forms a direction is lower than the upper surface of the flange portion 40c of the channel member 40 by adding a predetermined margin to the thickness of the cover plate 50. The first locking piece 61 is formed by the other piece 63b of the L-shaped plate 63 and attached to the inner surface of the side wall by, for example, bolting.

  The opening 21 formed in the top plate 11 has a substantially rectangular shape having a longitudinal direction that is the same as the longitudinal direction of the concave groove 20 and slightly narrower than the width of the concave groove 20. In this way, the top plate 11 constituting the edge of the long side of the opening 21 is projected in a bowl shape from the upper end of the groove 20 into the groove 20, and thus into the groove 20. The projecting top plate 11 is the above-described second locking piece 62 (see FIG. 3A).

  Then, both end portions in the width direction of the cover plate 50 are arranged at a distance s1 between the other piece 63b of the L-shaped plate 63 as the first locking piece 61 and the projecting portion of the top plate 11 as the second locking piece 62. By fitting, the cover plate 50 can be slid in the longitudinal direction of the groove 20 and is locked in the groove 20.

  In the present embodiment described with reference to FIGS. 1 to 3, the opening 21 having a predetermined length in the width direction of the bonnet 10 is provided in the top plate 11 covering the upper side of the groove 20 as described above. However, instead of the opening 21, a slit-like opening 21 'as shown by a broken line in FIG. 11 is formed so that the groove 20 is not covered by the top plate 11 over its entire length. May be. In this case, the width of the slit-shaped opening 21 ′ is also narrower than the width of the concave groove 20.

(3) Lid Plate The aforementioned lid plate 50 that is locked to the guide rail 60 constructed as described above is constituted by a rectangular plate that is formed to have a width substantially the same as the width of the groove 20. 2A and 2B, one end 50a in the longitudinal direction of the rectangular plate is bent downward to form a stopper plate 51, and the other end 50b side of the flat cover plate 50 is 1 and 2, the first locking piece 61 (the other piece 63b of the L-shaped plate 63) and the second locking piece 62 (the protruding portion of the top plate 11) are inserted into the space s1 from the left side of the drawing. At the same time, the lid plate 50 is moved to the closed position where the concave groove 20 is covered at the upper part of the hanging metal fitting 25 by sliding the stopper plate 51 toward the right side of the sheet until it comes into contact with a partition wall 70 described later. The stopper plate 51 and the partition wall 70 can be engaged with each other. Thus, the lid plate 50 cannot be slid to the right side of the drawing beyond the closed position.

  The cover plate 50 is formed to be longer than the entire length of the opening 21 formed in the top plate 11 of the bonnet 10, and one end 50a of the cover plate 50 is placed under the first bridging plate 11a and the other end 50b in the aforementioned closed position. Is preferably arranged below the second bridge plate 11b.

  By forming the cover plate 50 in this way, the peripheral portion of the cover plate 50 is covered with the top plate 11, and the cover plate 50 can be opened by inserting the tip of the bar from the periphery of the cover plate 50. Disappear.

  On the one end 50a side of the lid plate 50 where the stopper plate 51 is provided, a latch receiver 52 is provided to which a latch 56 provided on a lock 55 attached to a partition wall 70 described later is locked. See FIG. 2B].

  In the illustrated embodiment, a metal plate bent in a crank shape in the plan view shown in FIG. 1 is welded to the back surface of the cover plate 50 as the latch receiver 52. The structure of the latch receiver 52 is as follows. However, the present invention is not limited to the structure shown in the figure, and any structure can be used as long as it engages with the latch 56 and locks the cover plate 50 in the closed position so that sliding to the left side in FIGS. Alternatively, for example, a flat metal plate may be welded or the like, or a slit or the like for receiving a latch may be formed on the lid plate 50, and this may be used as the latch receiver 52.

(4) Partition Wall As described above, the partition wall 70 that contacts the stopper plate 51 is provided below the portion where the one end 50a of the cover plate 50 is located when the cover plate 50 is slid to the closed position. It has been.

  In the illustrated example, the partition wall 70 includes a vertical wall 72 that partitions the concave groove 20 in the width direction, an upper horizontal wall 71 that protrudes from the upper end of the vertical wall 72 toward the suspension fitting 25, and a vertical wall 72. A lower end horizontal wall 73 protruding from the lower end toward the hanging bracket 25 side, and a fixed wall 74 protruding from the side of the vertical wall 72 toward the hanging bracket 25 side in parallel with the inner surface of the side wall of the groove 20. [See FIG. 2 (B)], and this fixed wall 74 is attached to the inside of the groove 20 by bolting or the like to the inner surface of the side wall of the groove 20.

  However, the configuration of the partition wall 70 is not limited to the illustrated configuration, and the shape of the partition wall 70 is particularly limited as long as the groove 20 can be partitioned in the width direction and a lock 55 described later can be attached. For example, the lower horizontal wall 73 may be formed longer than that shown in the figure and may be attached to the bottom wall of the concave groove 20 by bolting or the like. 74 may be omitted.

  Further, by attaching a flat metal plate to the bottom wall or side wall inner surface of the groove 20 by welding or the like, this may be provided as the partition wall 70, and various structures can be employed.

  The partition wall 70 is configured such that the upper end of the partition wall 70 is located at a position slightly lower than the upper end of the recessed groove 20, and thus the bottom surface of the first bridging plate 11 a, by a slightly wider interval than the thickness of the lid plate 50. A space for inserting the cover plate 50 is formed between the upper end of the partition wall 70 and the back surface of the first bridging plate 11a.

  The vertical wall 72 of the partition wall 70 has a notch corresponding to the shape of the latch receiver 52 corresponding to the mounting position of the latch receiver 52 attached to the back surface of the lid plate 50 as shown in FIG. 75, and the notch 75 causes the latch receiver 52 projecting from the bottom surface of the cover plate 50 to pass over the partition wall 70 as the cover plate 50 slides, and to the left side of FIG. Can be moved to.

  However, as described above, when a protrusion that moves beyond the partition wall 70 is not provided on the back surface of the cover plate 50, such as a slit formed in the cover plate 50 as the latch receiver 52, the partition wall 70 is provided. It is not necessary to provide such a notch 75 in the vertical wall 72 of the first embodiment.

  An opening for attaching a lock is provided in the vertical wall 72 of the partition wall 70, and a cylinder of the lock 55 having a male screw formed on the outer periphery is inserted into the opening.

  The lock 55 is inserted into the opening so that the head portion provided with the keyhole is disposed on the surface of the vertical wall 72 opposite to the suspension bracket 25 side, and penetrates the vertical wall 72 to the suspension bracket 25 side. A nut is screwed onto the outer periphery of the cylinder protruding from the side of the hanging bracket 25 so that the vertical wall 72 of the partition wall 70 is sandwiched between the head of the lock 55 and the nut, and the vertical wall 72 of the partition wall 70 is locked. 55 is fixed.

  A latch 56 is provided at the end of the lock 55 on the side of the hanging metal fitting 25 and is rotated in parallel with the vertical wall 72 of the partition wall 70 by the operation of a key inserted into the key hole of the lock 55. By locking the latch between the locking position where the tip of the latch 56 is locked to the latch receiver 52 provided on the back surface of the door and the unlocking position where the latch 56 is removed from the latch receiver 52, It is comprised so that unlocking can be performed.

  In the illustrated example, as shown in FIGS. 2 (A) and 2 (B), a partition wall 80 that partitions the inside of the groove 20 in the width direction is also provided below the second bridge plate 11b. The lower end of the metal plate having a width corresponding to the width of the concave groove 20 is welded to the bottom wall of the concave groove 20. A horizontal wall is provided at the lower end of the partition wall 80, and the horizontal wall is formed into the concave groove. It may be attached to the bottom wall 20 by bolting or the like, and, like the partition wall 70 provided on the left side in the figure, on the side of the partition wall 80 in parallel with the side wall of the recessed groove 25 toward the hanging metal fitting 25 side. A protruding fixing wall may be provided, and the fixing wall may be attached to the inner surface of the side wall of the concave groove by bolting or the like, and the configuration is not limited to the example shown.

  Further, the partition wall 80 provided below the second bridge plate 11b is not necessarily provided and may be omitted.

(5) Others In addition, in FIGS. 1 and 2, reference numeral 45 denotes a reinforcing rod, which connects the side walls 40 a, 40 a of the channel material 40 and lifts the portable work machine 6 using the hanging bracket 25. The channel material 40 is prevented from being distorted or twisted.

  Further, the lid plate 50 described above is provided with a finger hooking hole for inserting a finger, for example, on the other end 50b side, or by attaching a handle, a knob, or the like so that a portion to which a finger is hung when the lid plate 50 is slid is provided. It may be formed.

  Such a handle or knob may be provided on the above-described stopper plate 51 provided on the one end 50a side of the lid plate 50, for example.

(6) Operation, etc. In the anti-theft mechanism 1 configured as described above, a notch (see FIG. 2) provided on the top plate 11 with the lid plate 50 slid to the closed position shown in FIGS. By inserting a hand into the recessed groove 20 from the notch 31) on the left side of the sheet 1, 2 and inserting the key into the key hole of the lock 55 to operate the lock 55, the latch receiver 52 provided on the bottom surface of the cover plate 50 If the latch 56 of the lock 55 is locked and the lid plate 50 is locked so as not to slide, it becomes impossible to lock the crane hook or the like to the hanging metal fitting 25 provided in the concave groove 20.

  Further, due to the configuration of the rope bracket 35 described above, the portable work machine 6 cannot be lifted using the rope bracket 35.

  Moreover, with the above-described configuration, at least two sides (long sides of the lid plate) in the width direction of the lid plate 50 are covered with the top plate 11 of the bonnet 10, and an opening 21 is formed in the top plate 11. In the configuration in which the bridging plates 11a and 11b are provided, the short sides forming both ends 50a and 50b in the longitudinal direction of the lid plate 50 are also covered by the bridging plates 11a and 11b. Since the tip of the bar cannot be inserted, and the width of the lid plate 50 is formed larger than the width of the openings 21 to 21 ', the lid plate 50 is inserted through the openings 21 and 21'. It cannot be removed.

  Further, the cover plate 50 is slid as described above to open the upper portion of the recessed groove 20 at the position where the hanging bracket 25 is accommodated, so that the cover plate 50 can be an obstacle when the crane hook or the like is locked. As a result, the work can be performed without completely removing the cover plate 50 from the bonnet 10, and there is no need to perform complicated work such as storage associated with the removal of the cover plate 50, and loss can be prevented.

  Even when another portable work machine or the like is loaded on the portable work machine 6 equipped with the anti-theft mechanism of the present invention with the cover board 50 opened, the cover board 50 is used for the top of the bonnet 10. It does not protrude on the plate 11, and the lid plate 50 is not crushed and damaged or deformed by the bottom surface or legs of the portable work machine loaded on top.

Example 2
A second embodiment of the anti-theft mechanism 1 of the present invention will be described with reference to FIGS. The anti-theft mechanism of the present embodiment also shows a configuration example for the bonnet 10 having the structure described with reference to FIG. 11, like the anti-theft mechanism of the first embodiment.

  In the anti-theft mechanism 1 of the first embodiment described with reference to FIGS. 1 to 3, the first locking piece 61 constituting the guide rail 60 that slidably locks the cover plate 50 in the recessed groove 20 is provided. The top plate 11 is formed by the other piece 63b (horizontal wall) of the L-shaped plate 63 to which the inner wall of the concave groove 20 is attached, and the second locking piece 62 of the guide rail 60 is projected into the concave groove 20 in a bowl shape. In this embodiment, as shown in FIG. 6A, in addition to the first L-shaped plate 63 ′ corresponding to the L-shaped plate 63 in the first embodiment, the second L-shaped portion is formed. A plate 64 is provided, and a second locking piece 62 of the guide rail 60 is formed by the other piece 64 b (horizontal wall) of the second L-shaped plate 64.

  In the configuration example shown in FIGS. 4 to 6, both ends in the longitudinal direction of the pair of first L-shaped plates 63 ′ are integrally connected by the partition walls 70 and 80, respectively. A structure including ', 63' and partition walls 70, 80 is formed as a constituent part, and this is attached to the recessed groove 20. The first L-shaped plate 63 'and the partition walls 70, 80 are respectively It may be formed as an independent member.

  As shown in FIG. 4, the above-described structure has the first L-shaped plate 63 ′ formed from two sides forming both ends in the width direction of a rectangular plate formed slightly narrower than the width of the concave groove in plan view. A vertical wall forming one piece 63a 'protrudes downward, and a vertical wall forming vertical walls 72 and 82 of the partition walls 70 and 80 protrudes downward from two sides forming both ends of the rectangular plate in the longitudinal direction. I am letting.

  A rectangular opening that is substantially similar to the rectangular plate is formed at the center of the rectangular plate, and the first L-shaped plate is formed by the formation of this opening by the strip-shaped portion that forms the longitudinal direction of the rectangular plate. The other end 63 b ′ of 63 ′ is formed, and upper horizontal walls 71, 81 of the partition walls 70, 80 are formed by a strip-shaped part that forms the width direction of the rectangular plate.

  At the lower ends of the vertical walls 72, 82 of the partition walls 70, 80, horizontal walls 73, 83 projecting from the lower ends of the vertical walls 72, 82 toward the hanging bracket 25 are provided. , 83 are placed on the bottom wall of the groove 20, the upper surfaces of the upper horizontal walls 71, 81 of the partition walls 70, 80 and the upper surface of the second piece 63b 'of the first L-shaped plate 63' With respect to the upper surface of the flange portion 40 c of the channel material 40, and thus the bottom surface of the top plate 11 of the bonnet 10, it is arranged at a lower position by a height obtained by adding a predetermined margin to the thickness of the cover plate 50.

  This structure is in an opening formed in a rectangular plate in plan view, and therefore in a space surrounded by the other piece 63b 'of the first L-shaped plate 63' and the upper horizontal walls 71, 81 of the partition walls 70, 80. The vertical wall, which is disposed in the groove 20 and is formed in one piece 63a of the first L-shaped plate 63 ', is bolted to the inner surface of the side wall of the groove 20 so that the above-described suspension metal fitting 25 is disposed on the inner surface of the groove. It is attached at a predetermined position in the groove 20.

  When the structure is attached, a piece 64a of the second L-shaped plate 64 is inserted between the inner surface of the side wall of the concave groove 20 and a piece 63a 'of the first L-shaped plate 63', and a piece 63a that is perpendicular to the second L-shaped plate 63 ' The first L-shaped plate 63 ′ is bolted to the inner surface of the side wall of the concave groove 20 together with a piece 63a ′.

  The attachment of the second L-shaped plate 64 performed in this way is such that the bottom surface of the other piece 64b of the second L-shaped plate 64 is flush with the upper surface of the flange portion 40c of the channel material 40, and the first L-shaped plate 63 ′ is attached. It is carried out so as to be arranged in parallel on the other piece 63b ′.

  Therefore, between the upper surface of the other piece 63b ′ of the first L-shaped plate 63 ′ provided in the structure and the bottom surface of the other piece 64b of the second L-shaped plate 64, the cover plate slides with respect to the thickness of the cover plate 50. The gap s1 is formed so as to be wide enough to allow a certain margin, and by inserting both ends of the lid 50 in the width direction into the gap s1, the lid 50 is moved in the longitudinal direction of the groove 20. It is configured so that it can be slid.

  Therefore, in the present embodiment, the first locking piece 61 of the guide rail 60 described above is caused by the other piece 63b ′ of the first L-shaped plate 63 ′, and the other piece 64b of the second L-shaped plate 64 is provided by the other piece 64b of the guide rail 60. Second locking pieces 62 are respectively formed.

  In the illustrated configuration in which the opening 21 is formed in the top plate 11 of the bonnet 10 that covers the concave groove 20 above the housing position of the hanging metal fitting 25, the opening width of the opening 21 is the same as the width of the concave groove 20. Or, as shown in the illustrated example, it is formed so as to be slightly wider than the width of the groove 20 so that the second L-shaped plate 64 and the top plate 11 do not interfere with each other.

  Further, the entire length of the second L-shaped plate 64 is slightly shortened with respect to the length of the opening 21 formed in the top plate 11, and the second L-shaped plate is inserted into the opening 21 of the top plate 11. It is configured to be able to.

  In the example shown in the figure, the entire length of the above-described structure forming the first L-shaped plate 63 ′ and the partition walls 70, 80 is formed to be substantially the same as the entire length of the opening 21 formed in the top plate 11. However, the total length of the structure may be longer than the total length of the opening 21 provided in the top plate 11, and in this case, both ends in the longitudinal direction of the structure are the first and second bridge plates, respectively. You may comprise so that it may be arrange | positioned under 11a, 11b.

  However, as shown in FIGS. 4 and 5, in the illustrated configuration in which the reinforcing bars 45, 45 are installed across the inner walls of the concave groove 20, the entire length of the structure is set between the reinforcing bars 45, 45. It is formed to be less than the interval so as to fit between the reinforcing bars 45, 45.

  In the configuration in which the structural body is disposed between the reinforcing bars 45 and 45 as described above, the stopper plate 51 provided at the one end 50a of the cover plate 50 is positioned on the left side of the drawing in FIGS. The lid plate 50 is configured to be in a closed position at a slide position that is in contact with or slightly spaced from the reinforcing bar 45 provided on the lid.

  An opening for attaching the lock 55 to the vertical wall 72 is formed in the partition wall 70 arranged on the one end 50a side of the lid plate 50 provided with the stopper plate 51, and inserted into this opening. The lock 55 is fixed to the vertical wall 72 by screwing a nut to the outer periphery of the cylinder of the lock 55, and the latch 56 provided on the lock 55 is parallel to the vertical wall 72 of the partition wall 70 by the operation of the lock 55. It is the same as that of the anti-theft mechanism in the first embodiment described above.

  In the anti-theft mechanism 1 of this embodiment, a slit that penetrates the cover plate 50 is provided as a latch receiver 52 for locking the latch 56 provided on the lock 55, as shown in FIG. The cover plate 50 can be locked in the closed position by receiving the tips of 56.

  However, the latch receiver 52 may be provided with a plate or the like fixed to the back surface of the cover plate 50 in the same manner as in the first embodiment. In this case, the vertical wall 72 of the partition wall 70 A notch that allows passage of the latch catch is provided in part.

  4 to 6, the stopper plate 51 provided on the other end 50b side of the lid plate 50 or one end side of the lid plate 50 is provided with a finger hooking hole, a knob, a handle, or the like. The lid plate 50 may be easily slid.

  In the illustrated example, as described above, the top plate 11 covering the upper side of the groove 20 has been described as having an opening 21 having a predetermined length, but instead of this opening, as indicated by a broken line in FIG. A slit-shaped opening 21 ′ may be formed in the groove 20 so that the upper portion of the groove 20 is opened over the entire length of the groove 20. In this case, the width of the slit-shaped opening 21 ′ is the same as the width of the groove 20 or slightly wider than the width of the groove 20.

  In the illustrated configuration, the partition wall 80 is also provided on the other end 50b side of the cover plate 50. However, the partition wall 80 may be omitted.

  Also in the anti-theft mechanism 1 of the present embodiment configured as described above, the lid plate 50 is slid to the closed position shown in FIGS. 4 and 5A, similarly to the anti-theft mechanism 1 described as the first embodiment. When locked in the state, the crane hook or the like cannot be locked to the hanging metal fitting 25 provided in the concave groove 20, and the portable work machine 6 cannot be lifted.

  In addition, at least two sides (long sides) forming the width direction of the cover plate 50 are covered with the other piece 64b of the second L-shaped plate 64, and the concave groove 20 is covered above the accommodation position of the hanging metal fitting 25. In the illustrated configuration in which the opening 21 is formed in the top plate 11, the cover plate 50 is formed so that the entire length of the cover plate 50 is longer than the total length of the opening 21, thereby forming both ends 50 a and 50 b in the longitudinal direction of the cover plate 50. Since the side (short side) is also covered with the first and second bridge plates 11a and 11b, the tip of the bar cannot be inserted from the periphery of the cover plate 50 to the lower surface side of the cover plate 50. Moreover, since the width of the lid plate 50 is formed larger than the interval between the other pieces 64b of the second L-shaped plate 64, the lid plate 50 cannot be peeled upward from the groove 20. ing.

  Further, the lid plate 50 is slid as described above to open the upper part of the hanging metal fitting 25 of the concave groove 20. As a result, the work can be performed without completely removing the cover plate 50 from the hood, and troublesome operations such as storage accompanying the removal of the cover plate, loss, and the like can be prevented.

  Even when another portable work machine or the like is loaded on the portable work machine 6 equipped with the anti-theft mechanism 1 of the present invention with the cover plate 50 opened, the cover plate 50 is placed on the upper side. It will not be damaged or deformed by being crushed by the bottom or legs of the loaded portable work machine.

Example 3
The anti-theft mechanism 1 of the first and second embodiments described above shows an application example to the hood 10 having the structure described with reference to FIG.

  On the other hand, refer to FIGS. 7 to 10 for the structure of the antitheft mechanism 1 of the third embodiment applied to the portable work machine 6 having the bonnet 10 having the structure described with reference to FIG. To explain.

  However, even in the configuration of the bonnet 10 described with reference to FIG. 11, the antitheft mechanism 1 having the configuration described below may be provided in the channel material 40.

  In the anti-theft mechanism 1 of this embodiment, the channel material 40 includes a bottom wall 40b and a pair of side walls 40a and 40a erected from two sides forming the longitudinal direction of the bottom wall 40b. Unlike the channel material described as the first and second embodiments, the flange portion is not provided at the upper end of the side wall 40a.

  Then, by attaching a side surface 11c formed by bending the end portion of the top plate 11 of the bonnet 10 to the upper end of the outer wall of the side walls 40a, 40a of the channel member 40, for example, as shown in FIG. A groove 20 is formed on the upper surface of the hood 10 over the entire length of the bonnet 10 in the width direction.

  The hanging bracket 25 is attached to a substantially central position in the longitudinal direction of the concave groove 20, and a predetermined range in the longitudinal direction of the concave groove 20 around the attachment position of the hanging bracket 25 is set in the concave groove 20. It is comprised so that it can cover with the cover board 50 which is fitted to and slides in the longitudinal direction of the ditch | groove 20. As shown in FIG.

  In order to enable the lid plate 50 to slide, in this embodiment, as shown in FIGS. 7 to 10, a locking piece 65 a rising above one end of the intermediate horizontal wall 65 b and the intermediate horizontal wall 65 b are provided. A lower vertical wall 65c protruding downward from the end is provided, and a bent plate 65 bent in a crank shape in the cross section in the width direction is provided as shown in FIG. The locking piece 65a is arranged parallel to the inner wall of the concave groove 20 with a predetermined interval s2 at the upper end of the concave groove 20 by bolting the inner wall of the concave groove 20 or the like. Thus, the cover plate 50 can be locked in the concave groove 20 by the locking piece 65a.

  In order to make it possible to lock the cover plate 50 to the locking piece 65a, the cover plate 50 is formed in a rectangular shape in plan view in which the width is formed slightly narrower than the width of the groove, A fitting wall 53 protruding downward from two sides forming both ends of the lid plate 50 in the width direction is provided, and the fitting wall 53 of the lid plate 50 is formed between the inner wall of the groove 20 and the locking piece 65a. The cover plate 50 is fitted to the upper end portion of the groove 20 so as to fit within the gap s2.

  The locking piece 65a is provided with a long-hole-shaped locking piece-side guide hole 67 whose longitudinal direction is the sliding direction of the cover plate 50, and hence the longitudinal direction of the groove 20. The locking piece side guide hole 67 is provided over substantially the entire length in the longitudinal direction of the locking piece 65a except for the one end 50a side of the cover plate 50, which is the side locked to the partition wall 70 described later. When the cover plate 50 is slid by loosely fitting a guide pin 68b projecting from the fitting wall 53 on the other end 50b side of the cover plate 50 into the engagement piece side guide hole 67, the guide plate 68b is slid. The pin 68 b moves in the locking piece side guide hole 67 in the longitudinal direction of the locking piece side guide hole 67, and the guide pin 68 b provided on the fitting wall 53 of the cover plate 50 is connected to the inner edge of the locking piece side guide hole 67. The other end 50b of the cover plate 50 cannot be removed from the inside of the groove 20 (see FIG. 10A).

  Similarly, the fitting wall 53 provided in the lid plate 50 is similarly provided with a long-hole-like lid plate side guide hole 66 whose longitudinal direction is the sliding direction of the lid plate 50, on the other end 50 b side of the lid plate 50. The guide pin 68a protruding from the locking piece 65a on the side of the partition wall 70 that locks the one end 50a of the cover plate 50 is provided over the entire length of the fitting wall 53 except for the portion. By loosely fitting in the hole 66, when the cover plate 50 is slid, the guide pin 68a protruding from the locking piece 65a relatively moves in the longitudinal direction in the cover plate side guide hole 66. The cover plate 50 is slidable in the longitudinal direction of the concave groove 20 by the guide of the cover plate side guide hole 66 and the guide pin 68a, and the guide pin 68a provided on the locking piece 65a is fitted to the cover plate 50. Inside the cover plate side guide hole 66 provided in the wall 53 By engaging with the one end 50a of the cover plate 50 in the closed position, and is configured so that it can not be removed from inside the recessed groove 20 [see FIG. 10 (B)].

  Further, the lid plate 50 cannot be slid within a range longer than the formation length of the guide holes 66 and 68 by the lid plate side, the locking piece side guide holes 66 and 67 and the guide pins 68a and 68b. , 67 and the guide pins 68a and 68b, the lid plate 50 can be stopped at the closed position covering the suspension fitting 25 and the open position where the suspension fitting 25 is opened. ing.

  A guide roller 69b is rotatably supported on the guide pin 68a protruding from the locking piece 65a. The guide roller 69b is disposed between the locking piece 65a and the fitting wall 53 of the lid plate. The back surface of the cover plate 50 is carried by the outer periphery [FIG. 10 (B)].

  A guide roller 69a is also rotatably supported by a guide pin 68b protruding from the fitting wall 53 of the lid plate 50, and this guide roller 69a serves as a fitting wall between the aforementioned locking piece 65a and the lid plate 50. 53, and the outer periphery of the guide roller 69a is placed on an intermediate horizontal wall 65b projecting in the orthogonal direction from the lower end of the locking piece 65a. By the projecting guide pin 68a and the guide roller 69a pivotally supported by the guide pin 68a, the one end 50a side of the cover plate 50 is placed on the intermediate horizontal wall 65b (FIG. 10A).

  Thus, by attaching the above-described guide rollers 69a and 69b to both the guide pin 68a protruding from the locking piece 65a and the guide pin 68b protruding from the fitting wall 53 of the cover plate 50, The cover plate 50 can be easily slid without resistance by the rotation of the guide rollers 69a and 69b.

  Of the both ends 50a, 50b in the longitudinal direction of the cover plate 50, a latch receiver 52 that engages with a latch 56 provided on a lock 55 attached to the partition wall 70 described later is provided at one end 50a that is locked to the partition wall 70. Is provided.

  In the illustrated embodiment, a vertical wall 54a formed by bending downward on the short side forming the one end 50a of the cover plate 50 as shown in FIG. 8B, and a lower end of the vertical wall 54a are further provided. A bent portion 54 constituted by a horizontal wall 54b formed by bending toward the hanging metal fitting 25 side is provided, and a slit for receiving the tip of a latch 56 is formed on the horizontal wall 54b of the bent portion 54 as a latch receiver 52. The structure of the latch receiver 52 is not limited to the structure shown in the figure. For example, as in the first embodiment described with reference to FIGS. Alternatively, as in the second embodiment described with reference to FIGS. 4 to 6, a slit or the like for receiving the leading end of the latch 56 may be formed on the lid plate 50 itself as a latch receiver.

  In the state in which the lid plate 50 is in the closed position, a partition wall 70 is provided in the concave groove 20 below the one end 50a of the lid plate 50 to partition the concave groove 20 in the width direction.

  In the illustrated embodiment, the partition wall 70 includes a vertical wall 72 that partitions the groove 20 in the width direction, an upper horizontal wall 71 that projects from the upper end of the vertical wall 72 toward the hanging bracket 25, and a vertical wall 72. The lower end horizontal wall 73 projecting from the lower end toward the suspension fitting 25 is provided, and the lower end horizontal wall 73 is attached to the groove 20 by bolting to the bottom wall of the groove 20.

  However, the structure of the partition wall 70 is not limited to the illustrated configuration. For example, as in the partition wall 70 according to the first embodiment (the partition wall 70 on the left side of the paper in FIG. 2), a hanging metal fitting is provided from the side of the vertical wall 72. A fixed wall protruding in parallel with the inner wall of the groove 20 toward the 25 side may be provided, and the fixed wall may be bolted to the inner surface of the side wall of the groove 20, and the partition wall 70 ( Like the partition wall 70 on the left side of the paper surface in FIG. 6, it may be formed integrally with the bent plate 65, and is not limited to the illustrated configuration.

  The upper surface of the upper horizontal wall 71 of the partition wall 70 is formed at substantially the same height as the bottom surface of the horizontal wall 54b of the bent portion 54 formed at one end 50a of the lid plate 50, and the lid plate 50 is slid to the closed position. When this is done, the horizontal wall 54 b of the bent portion 54 is configured to be placed on the upper end of the partition wall 70.

  An opening for attaching the lock 55 is formed in the vertical wall 72 of the partition wall 70, and the lock 55 is fixed by screwing a nut onto the outer periphery of the cylinder of the lock 55 inserted into the opening. The point that the latch 56 provided on the lock 55 rotates in parallel with the vertical wall 72 of the partition wall 70 by the operation of the lock 55 is that the antitheft mechanism in the first and second embodiments described above. The configuration is the same.

  In the illustrated example, a partition wall 80 that partitions the inside of the groove 20 in the width direction is provided below the other end 50b of the cover plate 50 in the closed position. The partition wall 80 includes a vertical wall 82 for partitioning the inside of the groove 20 in the width direction, an upper horizontal wall 81 projecting from the upper end of the vertical wall 82 toward the suspension bracket 25, and a suspension bracket 25 from the lower end of the vertical wall 82. One end of the cover plate 50 is provided with a lower horizontal wall 83 projecting toward the side, and the lower horizontal wall 83 is bolted to the bottom wall of the concave groove 20 and attached to the concave groove 20. 50a has the same configuration as that of the aforementioned partition wall 70, but its height so that the upper end can be brought into contact with or close to the back surface of the other end 50b formed flat on the cover plate 50. Is different in that it is formed higher than the partition wall 70 provided on the one end 50a side of the lid plate 50 by the height of the vertical wall 54a of the bent portion 54.

  Various structures can also be adopted for the partition wall 80 provided on the other end 50b side of the cover plate 50. For example, as in the partition wall 70 of Example 1 (the partition wall 70 on the left side of the paper in FIG. 2), A fixing wall that protrudes in parallel with the inner wall of the groove 20 from the side of the vertical wall 82 toward the hanging bracket 25 may be provided, and this fixing wall may be bolted to the inner surface of the side wall of the groove 20. Like the partition wall 80 of Example 1 (the partition wall 80 on the right side in FIG. 2), the lower end of the metal plate may be formed by welding to the bottom wall of the groove 20, and the bent plate 65 described above may be used. It is good also as what forms as one.

  Further, the partition wall 80 provided on the other end 50b side of the cover plate 50 is not necessarily provided and may be omitted.

  Similar to the anti-theft mechanism of the first and second embodiments, the lid plate 50 may be provided with finger holes, knobs, handles, etc., and may be used as a clue when the lid plate 50 is slid. In the illustrated configuration in which 11a and 11b are not provided, sliding of the cover plate 50 is not restricted even when the handle and the knob are provided on the one end 50a side of the cover plate 50.

  Also in the anti-theft mechanism 1 of the present embodiment configured as described above, the lid plate 50 is placed in the closed position shown in FIGS. 7 and 8A as in the anti-theft mechanism 1 described as the first and second embodiments. When locked in the slid state, the crane hook or the like cannot be locked to the suspension fitting 25 provided in the concave groove 20, and the portable work machine 6 cannot be lifted.

  Moreover, since the fitting wall 53 of the lid plate 50 and the locking piece 65a are connected via the guide pins 68a and 68b, the lid plate 50 cannot be removed above the concave groove 20. Yes.

  Further, the lid plate 50 is slid as described above to open and close the concave groove 20 at the top of the hanging metal fitting 25, so that two sides forming the inner surface of the side wall of the concave groove 20 and both ends in the width direction of the lid plate 50 are formed. It is only necessary to provide a slight gap between the two and the lid plate 50 to allow the lid plate 50 to slide, and it is difficult to pry the lid plate 50 by inserting a bar tip or the like through this portion. It has become a thing.

  In addition, since the lid plate 50 is configured to slide in this way, the lid plate 50 does not get in the way when the crane hook or the like is locked to the hanging bracket 25. As a result, the lid plate 50 is The work can be performed without being completely removed from the bonnet, and troublesome work such as storage of the cover plate 50 that occurs when the cover plate 50 is removed, loss, or the like can be prevented.

  Further, even when another portable work machine or the like is loaded on the portable work machine 6 equipped with the anti-theft mechanism 1 of the present invention with the cover board 50 opened, the cover board 50 is placed on the upper side. It will not be damaged or deformed by being crushed by the bottom or legs of the loaded portable work machine.

  In the configuration in which the guide rollers 69a and 69b are attached to the guide pins 68a and 68b, the lid plate 50 can be easily and smoothly slid.

Others In each of the embodiments described above, it is possible to change between replaceable components.

  For example, in the configuration of the hood 10 shown in FIG. 11, the structure of the third embodiment described with reference to FIGS. 7 to 10 is used instead of the configurations of the first and second embodiments described with reference to FIGS. A provided anti-theft mechanism may be provided.

  Further, in the configuration of the bonnet 10 shown in FIG. 12, both ends 50a of the lid plate 50 in the closed position are attached by attaching plate materials corresponding to the first and second bridging plates 11a and 11b in the bonnet 10 shown in FIG. , 50b may be covered.

1 Theft prevention mechanism 6 Portable work machine 10 Bonnet 11 Top plate (bonnet)
11a 1st bridge plate 11b 2nd bridge plate 11c Side surface (of top plate 11)
12 Side wall (bonnet)
20 concave groove 21 opening 21 'opening (slit shape)
21a One edge (of the opening 21)
21b The other edge (of the opening 21)
25 Hanging bracket 31 Notch 35 Rope bracket 35a One straight section (of the rope bracket)
35b The other straight part (of the rope bracket)
40 Channel material 40a Side wall (of channel material)
40b Bottom wall (of channel material)
40c Flange (channel material)
45 Reinforcing bar 50 Lid plate 50a One end (of the lid plate body)
50b The other end (of the lid plate body)
51 Stopper plate 52 Hatch holder (slit)
53 Fitting wall 54 Bent part 54a Vertical wall (of the bent part)
54b Horizontal wall (of the bent part)
55 lock 56 latch 60 guide rail 61 first locking piece 62 second locking piece 63 L-shaped plate 63a one piece (of the L-shaped plate 63)
63b Other piece (L-shaped plate 63)
63 '1st L-shaped board 63a' piece (of 1st L-shaped board 63 ')
63b 'other piece (of the first L-shaped plate 63')
64 2nd L-shaped plate 64a One piece (of 2nd L-shaped plate 64)
64b Other piece (of the second L-shaped plate 64)
65 Bending plate 65a Locking piece (upper vertical wall)
65b Intermediate horizontal wall 65c Lower vertical wall 66 Cover plate side guide hole 67 Locking piece side guide hole 68a, 68b Guide pin 69a, 69b Guide roller 70 Partition wall 71 Upper horizontal wall 72 Vertical wall 73 Lower horizontal wall 74 Fixed wall 75 Notch 80 Partition wall 81 Upper horizontal wall 82 Vertical wall 83 Lower horizontal wall s1, s2 Interval 500 Anti-theft mechanism 510 Bonnet 511 Top plate (of bonnet)
511a, 511b Bridge plate 520 Central recess 525 Suspension fitting 530 End recess 535 Rope hook 550 Lid plate 550a One end (of the lid plate)
550b The other end (of the cover plate)
552 Padlock 551 Tip step 555 Long hole 556 Flange δ1, δ2 Clearance

Claims (6)

A concave groove that is recessed with respect to the upper surface of the bonnet is formed on the upper surface of the bonnet that accommodates the component device, and the hanging metal fitting is accommodated in the concave groove, and the concave groove is formed above the housing position of the hanging metal fitting. In a theft prevention mechanism of a portable work machine, provided with a cover plate that covers the cover plate so as to be openable and closable, and having a locking means that locks the cover plate in an unopenable state with the concave groove covered.
The lid plate is formed in a rectangular shape having substantially the same width as the concave groove so as to be fitted in the concave groove,
Guide rails for locking both ends of the lid plate in the width direction are provided on the inner wall of the side wall on the upper end side of the groove, respectively, and the closed position that covers the groove on the upper part of the hanging bracket by the locking by the guide rail. And allowing the lid plate to slide in the longitudinal direction of the concave groove between the open positions for opening the upper part of the suspension fitting, and restricting the movement of the lid plate in the direction perpendicular to the longitudinal direction of the concave groove,
A partition wall that partitions the inside of the concave groove in the width direction is provided below one end in the longitudinal direction of the lid plate in the closed position, and the lid plate is engaged with the partition wall by locking the one end side of the lid plate. An anti-theft mechanism for a portable work machine, characterized in that the locking means that is slidably locked at the closed position is provided. A first locking piece projecting with a predetermined width in the horizontal direction from the inner surface of the side wall of the concave groove toward the center in the width direction of the concave groove, and the concave portion from each of the inner surface of the side wall of the concave groove 20. A first projection is provided in a horizontal direction toward the center in the width direction of the groove with a predetermined width, and is disposed in parallel on the first locking piece with a width slightly wider than the thickness of the cover plate. The guide rail is formed by two locking pieces,
The lid plate is slidably latched by fitting both ends in the width direction of the lid plate in the gap between the first locking piece and the second locking piece. Theft prevention mechanism of the portable work machine described. A top plate of the bonnet comprising a bottom wall and a pair of side walls erected from two sides forming the longitudinal direction of the bottom wall, and a channel material formed in a substantially U shape with a cross section in the width direction opened upward Attached to the back surface of the groove to form the groove,
A cross-section in the width direction forms an inverted L shape, and a first piece of the L-shaped plate having the longitudinal direction of the concave groove as a longitudinal direction is attached to the inner surface of the side wall of the concave groove, thereby the first piece by the other piece of the L-shaped plate Forming a locking piece,
An opening formed narrower than the width of the concave groove is formed in the top plate of the bonnet at least at the upper part of the housing position of the suspension fitting of the concave groove, and the top plate at the edge of the opening is formed. The anti-theft mechanism for a portable work machine according to claim 2, wherein the second locking piece is formed by the top plate at the protruding portion by protruding a predetermined width on the concave groove. A first L-shaped plate having a cross-section in the width direction having an inverted L-shape and a longitudinal direction of the groove being the longitudinal direction;
A cross section in the width direction forms an inverted L-shape, and a second L-shaped plate having the longitudinal direction of the groove as the longitudinal direction is provided.
The one piece of the first L-shaped plate and the one piece of the second L-shaped plate are held together with the one piece of the second L-shaped plate sandwiched between one piece of the first L-shaped plate and the inner wall of the concave groove. The first locking piece is formed by the other piece of the first L-shaped plate, and the second locking piece is formed by the other piece of the second L-shaped plate by being attached to the inner surface of the side wall of the concave groove. The anti-theft mechanism for a portable work machine according to claim 2. In the upper part of the concave groove, a locking piece arranged in parallel with each side wall inner surface of the concave groove with a predetermined interval is provided, and the guide rail is formed by the locking piece,
On the two sides that form both ends in the width direction of the lid plate, a fitting wall that protrudes downward is provided, and the fitting wall of the lid plate is fitted within the interval,
A lid plate side guide hole whose longitudinal direction is the sliding direction of the lid plate is formed in the fitting wall of the lid plate, and a guide pin protruding from the locking piece on one end side of the partition wall side, While loosely fitting in the lid side guide hole,
A locking piece side guide hole whose longitudinal direction is the sliding direction of the lid plate is formed in the locking piece, and a guide pin protruding from the fitting wall on the other end side of the lid plate with respect to the one end is provided on the locking plate. The antitheft mechanism for a portable work machine according to claim 1, wherein the anti-theft mechanism for a portable work machine is loosely fitted into the stopper side guide hole. A horizontal wall protruding from the lower end of the locking piece toward the side wall of the groove is provided, and a guide roller that contacts the outer periphery of the horizontal wall can be rotated to the guide pin protruding from the fitting wall of the lid plate As well as
6. The antitheft mechanism for a portable work machine according to claim 5, wherein a guide roller that contacts the back surface and the outer periphery of the cover plate is rotatably supported by the guide pin protruding from the locking piece.

Images