JP3589906B2 - Explosion-proof forklift - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an explosion-proof forklift used in places where there is a danger of explosion, such as two types of danger places.
[0002]
[Prior art]
FIG. 12 shows an example of a conventional explosion-proof forklift. This is such that an elevating body 3 is arranged on a mast 2 erected at a front part of a vehicle body 1 so as to be able to elevate and lower, and a fork 4 is attached to the elevating body 3. Lift the work W. Reference numeral 5 denotes an operation unit having a handle 5a, an operation lever 5b, and the like. Reference numeral 6 denotes a seat, which is provided on a battery cover 8 that fits into an upper opening 7a of a battery case 7 that stores a storage battery.
[0003]
The plug 9A for charging and the plug 9B for charging (see FIG. 1) provided on the outer peripheral surface of the battery case 7 are covered with a plug cover 10, and the plug cover 10 and the battery cover 8 are connected to a factory by the Industrial Safety Research Institute of the Ministry of Labor. The battery case 7 is locked by two locking devices (not shown) based on the electric equipment explosion-proof guidelines.
[0004]
[Problems to be solved by the invention]
In the above-described conventional configuration, the plug cover 10 and the battery cover 8 are locked to the battery case 7 by separate locking devices, respectively, so that the structure is complicated, the manufacturing cost is high, and the locking and unlocking are performed. Is troublesome and troublesome.
[0005]
SUMMARY OF THE INVENTION In view of the above-mentioned conventional disadvantages, the present invention satisfies the requirements based on the guidelines for explosion proof, has a simple structure, is inexpensive to manufacture, and can easily perform locking and unlocking operations. It aims to provide an explosion-proof forklift.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an invention according to claim 1 is an explosion-proof forklift in which a battery cover fitted into an upper opening of a battery case on a vehicle body is locked. The provided plug is covered with a plug cover, one side edge of the plug cover is connected to the outer peripheral surface of the battery case via a hinge so as to be openable and closable, and the other side edge upper portion of the plug cover is connected with the battery case. The battery case is characterized in that the battery case is sandwiched by a battery cover that fits into an upper opening of the battery case .
[0007]
According to the above configuration, only by locking the battery cover to the battery case by the locking device, the upper end of the other end of the plug cover is also sandwiched between the battery case and the battery cover, and the plug cover is locked. The battery cover and the plug cover can be locked with only one locking device, so that the configuration is simple and the manufacturing cost is low.
[0008]
According to a second aspect of the present invention, in the first aspect of the present invention, an elastic material is interposed between an upper portion of the other side edge of the plug cover and the battery cover.
[0009]
According to the above configuration, the upper portion of the other side edge of the plug cover is pressed against the battery case by the elastic material, and the plug cover can be securely fixed.
[0010]
According to a third aspect of the present invention, in the first or second aspect of the present invention, an extended portion extending upward from one side edge of the plug cover fits into the battery case and an upper opening of the battery case. So that when the battery cover is fitted into the upper opening of the battery case with the plug cover opened, the battery cover comes into contact with the extension. It is characterized by doing.
[0011]
According to the above configuration, when the battery cover is fitted into the upper opening of the battery case with the plug cover opened, the battery cover comes into contact with the extension of the plug cover, so that the plug cover is closed. It is possible to surely prevent forgetting.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
FIGS. 1 to 9 show an essential part of an explosion-proof forklift according to an embodiment of the present invention. One side edge 10 a of a plug cover 10 is fixed to an outer peripheral surface of a battery case 7 via a hinge 12. A locking device 14 is connected to the rectangular plate-shaped substrate 13 so as to be openable and closable, and locks the battery cover 8 to the battery case 7. Reference numeral 15 denotes a rubber plate that closes a gap between the plug cover 10 and the substrate 13, and a cord 9a of the power supply plug 9A and the charging plug 9B is inserted into a through hole of the rubber plate 15. Since the configuration other than the above is almost the same as the conventional example shown in FIG. 12, the same portions are denoted by the same reference numerals and description thereof will be omitted.
[0013]
The plug cover 10 is formed in a substantially U-shape in cross section. One side edge 10a is bent rearward at a right angle, and the other side edge 10b is bent rearward in a substantially L-shape to form the board 13. An upper portion 16 of the other side that is in contact with and extends upward from the other side edge 10b is sandwiched between the battery case 7 and the front wall portion 8a of the battery cover 8 fitted into the upper opening 7a of the battery case 7.
[0014]
According to the above configuration, the battery cover 8 is merely locked to the battery case 7 by the locking device 14, and the other upper edge 16 of the plug cover 10 is also sandwiched between the battery cover 8 and the battery case 7, and the plug The cover 10 can be locked, and at the time of maintenance, the plugs 9A and 9B are exposed to the outside simply by releasing the lock by the locking device 14, lifting the battery cover 8 and opening the plug cover 10. be able to.
[0015]
In this case, only one locking device 14 is required to lock the plug cover 10 and the battery cover 8, and the configuration is simple and the manufacturing cost is low.
[0016]
As shown in FIG. 5, an elastic member 17 made of rubber or the like is fixed to the inner surface of the front wall portion 8a of the battery cover 8, and the upper end 16 of the other side is pressed against the substrate 13 by the elastic member 17. As a result, the plug cover 10 can be securely fixed.
[0017]
As shown in FIG. 4, an extension 18 extending upward from one side edge 10 a of the plug cover 10 is inserted into a gap α between the front wall 8 a of the battery cover 8 and the board 13. As shown by the phantom line in FIG. 6, by opening the plug cover 10, as shown in FIG. 7, the extension 18 protrudes from the side surface of the battery case 7 by a predetermined interval β. When fitted to the upper opening 7a of the case 7, the side wall 8b of the battery cover 8 comes into contact with the extension 18, so that the plug cover 10 can be reliably prevented from being forgotten to close.
[0018]
As shown in FIGS. 8 and 9, the locking device includes a case 25 fixed to the battery cover 8 via a fixing frame 24, and a rotating shaft 26 rotatably disposed in the case 25 along a vertical direction. And a lock piece 27 protruding from the rotating shaft 26 and an engaged piece 28 protruding from the outer peripheral surface of the battery case 7 so as to face the lock piece 27. An operation hole 29 concentric with the rotary shaft 26 is formed through the top plate, and the square tip end of the operation tool 30 is engaged with the square hole 26 a formed on the upper surface of the rotary shaft 26 through the operation hole 29. Then, by operating the operating tool 30 by 90 °, the lock piece 27 stored in the case 25 (see the phantom line in FIG. 9) is protruded out of the case 25 and is engaged with the engaged piece 28. Like that.
[0019]
According to the above configuration, the battery cover 8 can be securely locked to the battery case 7 only by rotating the operating tool 30 engaged with the rotating shaft 26 through the operating hole 29 of the case 25, In addition, unlocking can be easily performed by the reverse procedure. Furthermore, by setting the diameter D of the operation hole 29 and the depth E to the rotary shaft 26 as predetermined, the rotary operation of the rotary shaft 26 cannot be performed with a normal tool. The requirements based on the equipment explosion protection guidelines can be fully satisfied.
[0020]
FIGS. 10 and 11 show a modification of the locking device 14, which includes a locking tool 19, an engagement frame 20, and a bolt 21. Since the configuration of the plug cover 10 is the same as that shown in FIGS. 1 to 9, the same portions are denoted by the same reference numerals and description thereof will be omitted.
[0021]
The locking member 19 includes a support frame 19a attached to a base 22 fixed to the outer peripheral surface of the battery case 7, a lever 19c pivotally attached to the support frame 19a via a pivot 19b, A ring 19d provided at the tip of the lever 19c and a substantially U-shaped locking piece 19e fixed to the front wall 8a of the battery cover 8, and after the ring 19d is engaged with the locking piece 19e, The battery cover 8 is locked to the battery case 7 by pulling down the lever 19c.
[0022]
The engagement frame 20 is formed of a metal plate having a central portion bent in a substantially U-shape to provide a concave portion 20a, and a through hole 20b formed at one end portion thereof is engaged with a lever 19c, thereby The lever 19c is fixed.
[0023]
The bolt 21 uses JIS B 1176 (hexagon socket head bolt) or JIS B 1180 (hexagon bolt) based on the guidelines for explosion-proof factory electrical equipment by the Ministry of Labor, Industrial Safety Research Institute, and is inserted into the recess 20a and engaged. The engagement frame 20 is fixed to the outer peripheral surface of the battery case 7 by being passed through the frame 20 and screwed into the screw hole of the base 22.
[0024]
According to the above configuration, after the battery cover 8 is locked to the battery case 7 by the locking member 19, the engaging frame 20 is engaged with the lever 19 c of the locking member 19, and the recess 20 a of the engaging frame 20 is formed. The battery cover 8 can be securely locked only by inserting a bolt 21 into the battery case 7 and fastening the engagement frame 20 to the outer peripheral surface of the battery case 7 with the bolt 21. Can be unlocked. Further, by setting the vertical width D1 and the horizontal width D2 of the concave portion 20a and the depth E of the concave portion 20a to the bolt 21 as predetermined, the screwed state of the bolt 21 cannot be released with a normal tool, The requirements based on the guidelines for explosion-proof factory electrical equipment by the Industrial Safety Research Institute of the Ministry of Labor can be fully satisfied.
[0025]
【The invention's effect】
According to the first aspect of the present invention, only by locking the battery cover to the battery case by the locking device, the upper end of the other end of the plug cover is also sandwiched between the battery case and the battery cover, and the plug cover is locked. Therefore, the battery cover and the plug cover can be locked with only one locking device, so that the configuration is simple and the manufacturing cost is low.
[0026]
According to the second aspect of the invention, the upper portion of the other side edge of the plug cover is pressed against the battery case by the elastic material, and the plug cover can be securely fixed.
[0027]
According to the third aspect of the invention, when the battery cover is fitted into the upper opening of the battery case with the plug cover opened, the battery cover comes into contact with the extension of the plug cover. Forgetting to close the plug cover can be reliably prevented.
[Brief description of the drawings]
FIG. 1 is a front view of a main part of an explosion-proof forklift according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a state where the plug cover is opened.
FIG. 3 is a view as viewed in the direction of arrows AA in FIG. 1;
FIG. 4 is a view taken in the direction of arrows BB in FIG. 1;
FIG. 5 is a view taken in the direction of the arrows CC in FIG. 1;
FIG. 6 is a view as viewed in the direction of arrows DD in FIG. 1;
FIG. 7 is a partially cutaway front view of a main part in a state where the plug cover is opened.
FIG. 8 is a side view of the vicinity of the locking device.
FIG. 9 is a plan view near the locking device.
FIG. 10 is a front view showing a modification of the locking device.
FIG. 11 is a view as seen in the direction of arrows EE in FIG. 10;
FIG. 12 is a side view showing a conventional explosion-proof forklift.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Body 7 Battery case 7a Upper surface opening of battery case 8 Battery cover 9A Power supply plug 9B Charging plug 10 Plug cover 12 Hinge 14 Locking device 16 Other upper edge of plug cover 17 Elastic member 19 Locking member 20 Engagement Frame 21 Bolt 25 Case 26 Rotating shaft 27 Lock piece 28 Engagement piece 29 Operation hole 30 Operation tool

Claims (3)

In an explosion-proof forklift in which a battery cover fitted to an upper opening of a battery case on a vehicle body is locked, a plug provided on an outer peripheral surface of the battery case is covered with a plug cover. The side edge is connected to the outer peripheral surface of the battery case via a hinge so as to be openable and closable, and the other upper side edge of the plug cover is sandwiched between the battery case and the battery cover fitted into the upper opening of the battery case. Explosion-proof forklift , characterized by being made . The explosion-proof forklift according to claim 1, wherein an elastic material is interposed between an upper portion of the other side edge of the plug cover and the battery cover . An extended portion extending upward from one side edge of the plug cover is inserted into a gap between the battery case and a battery cover fitted into an upper opening of the battery case, and the plug cover is opened. The explosion-proof forklift according to claim 1 or 2, wherein when the battery cover is fitted into the upper opening of the battery case, the battery cover comes into contact with the extension .

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