JPH05874U - Cover locking device - Google Patents

Abstract

(57) [Summary] [Purpose] The locking bolts cannot be loosened by grasping them with fingers, and when the bolts are loosened with a tool, they are prevented from falling off. [Structure] An openable / closable cover 4 is locked to a mounting surface 1 by a locking bolt 8 in a closed state. A cover 12 is provided on the outer surface of the mounting surface 1 so as to cover the head 9 of the bolt 8, and a through hole 13 for engaging a tool with the head 9 of the bolt 8 is formed in the cover 12. A nut 14 having a diameter larger than that of the through hole 13 is provided on the intermediate shaft portion 11 of the bolt 8.
To prevent the bolt 8 from falling out of the cover body 12 when the bolt 8 is loosened.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lock device for a cover, which is used as a locking means such as a cover for opening and closing the inspection window by forming an inspection window on an entire cover for covering a processing machine or the like.

[0002]

[Prior Art]

 In this type of inspection window locking device, the cover is locked in the closed state by inserting or tightening the locking bolts into the entire cover and the cover when the cover is closed. .. Since the inspection window is always closed except when maintenance is performed, it is locked by the bolt in this way.

[0003]

[Problems to be solved by the device]

 However, in this conventional locking device, the head of the locking bolt is exposed to the entire cover or the outer surface of the cover, so that the operator does not need to use the tool while operating the processing machine. There was a problem that it was not possible to ensure safety because there was the possibility of opening the cover by picking it with fingers and loosening it.

Further, in the conventional locking device, when the lock bolt is loosened and the cover is opened, the bolt may drop out from the insertion hole or the screw hole, so that the bolt may be lost or the bolt may be lost. There was also a problem that the machine fell into the machine and the machine broke down. The present invention was made by paying attention to the problems existing in such a conventional technique, and the purpose thereof is to make it impossible to loosen the lock bolt by grasping it with a finger. The risk of accidentally opening the cover during operation of the machine can be reliably prevented, and moreover, when the cover is opened by loosening the locking bolt with a tool, the bolt is prevented from falling off and being lost. It is to provide a locking device for the cover that can.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, according to the present invention, in a cover locking device in which an openable / closable cover is locked to a mounting surface by a locking bolt in a closed state, the head of the locking bolt is covered. As described above, a cover is provided on the mounting surface or the outer surface of the cover, and a through hole is formed in the cover to allow the passage of a tool for engaging the head of the bolt, and between the cover and the bolt. Is provided with a fall-out prevention means for preventing the bolt from falling out of the body when the bolt is loosened.

[0006]

[Work]

 In the cover locking device configured as described above, the cover is placed in the closed state with respect to the mounting surface, and the cover is locked in the closed state by inserting or tightening the locking bolts into the mounting surface and the cover. can do. When the cover is locked, the head of the lock bolt is covered by the cover, so it is impossible for the operator to pick and loosen the bolt with fingers without using a tool. It is possible to reliably prevent the risk of accidentally opening the cover while driving.

When the cover is opened and an internal inspection or the like is performed, the tool is inserted through the through hole of the cover body and engaged with the head of the lock bolt, and the tool is attached in this state. The cover can be unlocked by loosening the bolts. At this time, it is possible to prevent the bolt from falling out of the cover body by the drop-out preventing means.

[0008]

【Example】

 A first embodiment of a cover locking device embodying the present invention will be described in detail below with reference to FIGS. As shown in FIGS. 1 to 3, reference numeral 1 denotes an entire cover which is a mounting surface installed so as to cover, for example, a processing machine, and an inspection window 2 which opens in the lateral direction is formed at an upper end portion thereof. ing. The upper end of the inspection window 2 is open. The rail 3 is welded and fixed to the inner surface of the entire cover 1 so as to extend along the peripheral edge of the opening of the inspection window 2, and is opened upward. The cover 4 is mounted on the rail 3 so as to open and close the inspection window 2 so as to be vertically movable, and a pair of grips 5 are fixed to the upper end thereof.

The insertion hole 6 is formed in the vicinity of one side of the inspection window 2 so as to penetrate from the entire cover 1 to the cover 4 and the rail 3 in a state where the cover 4 is placed at the closed position, and the insertion hole 6 matches the insertion hole 6. As described above, the lock nut 7 is welded and fixed to the back surface of the rail 3. The locking bolt 8 is screwed into the locking nut 7 from the outer surface side of the entire cover 1 through the insertion hole 6 and has a head 9 having a tool engagement hole 9a, a threaded portion 10 at the tip, and the screw. The intermediate shaft portion 11 has a smaller diameter than the portion 10. Then, the cover 4 is locked in the closed state by inserting and screwing the lock bolt 8.

A substantially channel-shaped cover 12 is welded and fixed to the outer surface of the entire cover 1, and the cover 12 covers the head 9 of the locking bolt 8 so that an operator does not use a tool. It is impossible to pick up the bolt 8 with fingers and loosen it. Further, the corners on both sides of the front end of the cover 12 are formed in an arc shape so that an operator does not get injured by colliding with the corner of the cover 12. In addition, the cover 12 is open at its upper and lower surfaces so that dust and the like will not collect inside the cover 12.

A through hole 13 for allowing the passage of the tool is formed in the front wall of the cover body 12, and the tool is inserted into the engaging hole 9a of the head 9 of the locking bolt 8 through the through hole 13. The bolt 8 can be tightened or loosened by the insertion engagement. The through hole 13 is formed so as to have a larger diameter than the head portion 9 of the lock bolt 8, and at the time of assembly, the cover body 12 is welded and fixed to the outer surface of the whole cover 1, and the cover body 12 is fixed. Through the through hole 13 of 12, the lock bolt 8 can be screwed into the lock nut 7 from the through hole 6.

When the locking bolt 8 is assembled, the falling prevention nut 14 constituting the falling prevention means is screwed into the threaded portion 10 of the bolt 8 while being arranged in the cover body 12, and It is loosely fitted and supported by the intermediate shaft portion 11 of the bolt 8. The drop-out preventing nut 14 has an outer shape larger than the diameter of the through hole 13 of the cover body 12 and is formed in a square shape so that its rotation is restricted. Then, as shown in FIG. 1, when the locking bolt 8 is tightened, the drop-preventing nut 14 is interposed between the head 9 of the bolt 8 and the entire cover 1 to function as a washer. When the bolt 8 is loosened and removed from the lock nut 7 as shown in FIG. 3, the fall-out prevention nut 14 is interposed between the screw 10 and the cover 12 of the bolt 8, and It is possible to prevent the bolt 8 and the nut 14 from falling off.

Now, in this cover locking device, with the cover 4 placed at the closed position of the inspection window 2, the lock nut 7 is locked through the insertion holes 6 of the whole cover 1, the cover 4 and the rail 3. The cover 4 is locked in the closed state by inserting and screwing the work bolt 8 therein. When the cover 4 is in the locked state, the head 9 of the lock bolt 8 is covered by the cover body 12, so that it is impossible for an operator to pinch and loosen the bolt 8 without using a tool. Therefore, it is possible to reliably prevent the risk that the cover 4 is accidentally opened during the operation of the processing machine.

Further, for example, when the operation of the processing machine is stopped and the inspection 4 is performed by opening the cover 4 of the inspection window 2, a tool is inserted through the through hole 13 of the cover 12 and locked. The lock of the cover 4 can be released by engaging with the engaging hole 9a of the head portion 9 of the work bolt 8 and loosening the bolt 8 with the tool in this state to remove it from the lock nut 7. At this time, as shown in FIG. 4, the falling prevention nut 14 is interposed between the threaded portion 10 of the bolt 8 and the cover body 12 to prevent the bolt 8 and the nut 14 from falling out of the cover body 12. Therefore, it is possible to prevent the cover 4 from becoming incapable of being locked due to the loss of the bolt 8 and the like.

[0015]

[Another embodiment]

 Next, another embodiment of the present invention will be described with reference to FIGS. First, in the second embodiment shown in FIG. 5, the inspection window 2 is formed in the upper and lower intermediate portions of the whole cover 1, and a pair of backsides of the whole cover 1 are provided so as to extend along both upper and lower edges of the inspection window 2. The rail 3 is welded and fixed. A cover 4 is mounted between the rails 3 so as to be openable and closable by a lateral slide type, and the cover 4 is closed by a locking device including a locking bolt 8 having the same structure as that of the first embodiment described above. It is designed to be locked. Also in this embodiment, as in the first embodiment, the head 9 of the bolt 8 is covered with the cover 12, and the bolt 8 does not fall off from the cover 12 when the bolt 8 is loosened. ing.

Next, in the third embodiment shown in FIGS. 6 and 7, the inspection window 2 is formed in the upper and lower intermediate portions of the whole cover 1, and slightly protrudes from the opening peripheral edge of the inspection window 2 into the inspection window 2. As described above, the backing plate 15 is welded and fixed to the back surface of the whole cover 1. A cover 4 is attached to the inspection window 2 by a pair of hinges 16 so as to be openable and closable in a swinging door manner, and is welded and fixed to the back surface of the backing plate 15 through an insertion hole 6 formed in the cover 4 and the backing plate 15. The cover 4 can be locked in a closed state by screwing a locking bolt 8 into the locking nut 7 thus formed.

In this embodiment, the cover body 12 is welded and fixed to the outer surface of the cover 4, and the cover body 12 covers the head portion 9 of the locking bolt 8. In addition, a fall prevention nut 14 is loosely fitted and supported on the intermediate shaft portion 11 of the bolt 8 in the cover 12, and when the bolt 8 is loosened, this fall prevention nut 14 is loosely supported as in the above-described embodiments. The nut 14 prevents the bolt 8 from falling off.

Further, a fourth embodiment shown in FIGS. 8 to 10 will be described. In this embodiment, the case where the entire cover 1 is fixed to the frame body 19 serving as a mounting surface is shown. On the lower end portion of the whole cover 1, a latching projection piece 17 is fixed in a protruding manner. Then, by hooking this hooking projection piece 17 on the frame body 19, the entire cover 1 is incorporated inside the frame body 19. Then, in this state, the locking bolt 8 is screwed into the screw hole 17a formed in the hooking projection piece 17 and tightened, so that the whole cover 1 is pressed against the frame body 19 and the whole cover 1 is closed. It can be locked.

Also, in this embodiment, unlike the above-described first embodiment, the locking bolt 8 is composed only of the head portion 9 having the engaging hole 9a and the screw portion 10, and the screw portion of this bolt 8 In a state where 10 is screwed into the screw hole 17a of the latching projection piece 17, the cover body 12 is welded and fixed to the outer surface of the latching projection piece 17 to cover the head 9 of the bolt 8. Moreover, in this embodiment, as a means for preventing the locking bolt 8 from falling off, the cover 12 has a through hole 18 for tool insertion, which has a diameter smaller than the head 9 of the bolt 8 and larger than the engagement hole 9a. While being formed, the length L1 of the bolt 8 is formed to be larger than the distance L2 between the front surface of the hanging projection 17 and the back surface of the front wall of the cover 12.

Therefore, as shown in FIG. 9, when the whole cover 1 is locked in the closed state by tightening the locking bolt 8, the head portion 9 of the bolt 8 is locked as in the above-described embodiments. It is in a state of being covered by the cover 12. Therefore, it is impossible for an operator to pinch and loosen the bolt 8 with a finger without using a tool, and it is possible to reliably prevent the risk of accidentally opening the entire cover 1.

Further, a tool is engaged with the engaging hole 9a of the head portion 9 of the locking bolt 8 from the through hole 18 of the cover body 12, and the bolt 8 is loosened by the tool, so that the frame body 19 and the entire cover 1 are When the tightening between the bolts 8 is released, as shown in FIG. 10, the head portion 9 of the bolt 8 is covered with the screw portion 10 of the bolt 8 still screwed into the screw hole 17a of the hooking projection piece 17. It contacts the rear surface of the front wall of the body 12. Therefore, it is possible to prevent the bolt 8 from falling out of the cover 12.

The present invention is not limited to the configuration of each of the above-described embodiments. For example, instead of the lock nut 7, screw holes are directly formed in the rail 3, the contact plate 15, and the whole cover 1. As a fall-out preventing means, the C ring is replaced with the nut 14 and the C ring is fitted to the intermediate shaft portion 11 of the bolt 8, and the configuration of each portion is arbitrarily changed without departing from the spirit of the invention. It is also possible to embody.

[0023]

[Effect of the device]

 Since the present invention is configured as described above, it is impossible to pinch and loosen the lock bolt with fingers, and reliably prevent the risk of accidental opening of the cover during operation of the processing machine. It is also possible to prevent the bolt from falling off when the lock bolt is loosened with a tool to open the cover.

[Brief description of drawings]

1 is a partial enlarged cross-sectional view taken along the line AA of FIG. 2 showing a first embodiment of a cover locking device embodying the present invention.

FIG. 2 is a front view showing the whole of the inspection window cover.

FIG. 3 is an enlarged front view of the lock device portion.

FIG. 4 is a partial cross-sectional view showing a state in which a bolt of the lock device is loosened.

FIG. 5 is a front view of an inspection window cover showing a second embodiment of the present invention.

FIG. 6 is a front view of an inspection window cover showing a third embodiment of the present invention.

7 is a partially enlarged cross-sectional view taken along the line BB of FIG.

FIG. 8 is a partial perspective view of an entire cover showing a fourth embodiment of the present invention.

FIG. 9 is a partial cross-sectional view showing the lock device in an enlarged manner.

FIG. 10 is a partial cross-sectional view showing a state in which the bolt of the locking device is loosened.

[Explanation of symbols]

1 Overall Cover, 2 Inspection Window, 4 Cover, 8 Lock Bolt, 9 Head, 12 Cover, 13 Through Hole, 14
A fall prevention nut as a fall prevention means, 18 a through hole as a fall prevention means, 19 a frame.

Claims (1)

[Claims for utility model registration] 1. A cover locking device in which an openable and closable cover is locked in a closed state by a locking bolt with respect to a mounting surface, and covers the head of the locking bolt. As described above, a cover body is provided on the mounting surface or the outer surface of the cover, and the cover body is formed with a through hole that allows passage of a tool for engaging with the head of the bolt, and between the cover body and the bolt. Is a lock device for a cover, which is provided with fall-off preventing means for preventing the bolt from falling out of the cover body when the bolt is loosened.