JP3633029B2 - Lid opening / closing device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a lid opening / closing device that can facilitate an opening / closing operation.
[0002]
[Prior art]
In a battery-type forklift or the like, as shown in FIG. 6, a battery storage box c that stores a battery b is formed in a vehicle body a, and the upper surface thereof is opened and closed by using a tiltable cover e. It is easy to check, charge or replace the battery b.
[0003]
The cover e of the battery storage box c is usually made of a metal material and has a relatively large size, and a seat (not shown) on which a driver is seated is fixed on the upper surface thereof. Therefore, the weight is large, and a large operating force is required for opening and closing.
[0004]
Conventionally, in this type of cover opening and closing device, a biasing means such as a gas spring g having a rod f biased in a constantly extending direction is interposed between the cover e and the battery storage box c. Thus, the cover e is always urged in the opening direction, and the operation force when the cover e is opened is reduced.
[0005]
[Problems to be solved by the invention]
By the way, when the cover e of the battery storage box c is opened and the battery b is inspected, a fixing tool for fixing the cover e in the opened state is provided so that the cover e is not closed again from the opened state. As shown in FIGS. 6, 7, and 8, a stopper pin j is slidable in the axial direction on the leg piece i that supports the head guard h of the forklift, and the upper surface of the cover e An engagement fitting k having a substantially U shape that can be engaged with the stopper pin j in the open state of the cover e is welded.
[0006]
Accordingly, in order to fix the cover e in the open state when the battery b is inspected, such a switchgear has a special operation of pushing up the cover e and securely hooking the engagement fitting k to the stopper pin j. In addition to being inferior in operability, there is a problem in that the strength of the head guard itself is reduced, such as forming a hole for sliding the stopper pin j in the leg piece i of the head guard h.
[0007]
The present invention has been devised in view of such a problem, and the gas spring is provided with a stopper that prevents the rod from contracting when the rod protrudes beyond a certain length. A lid that can fix the cover in an open state without requiring any action, and when used in a forklift, prevents a drop in headguard strength without providing a stopper pin or the like on the leg piece of the headguard. It is an object of the present invention to provide a switchgear.
[0008]
[Means for Solving the Problems]
The present invention is a lid opening and closing device that opens and closes an opening provided in an upper portion of a storage box by using a lid that is pivotally supported at one end edge so that it can be tilted up and down.
One of the case cylinder and the rod of the gas spring having a case cylinder and a rod attached to the case cylinder so as to be extendable and projecting from one end surface of the case cylinder in an extending direction is used as the lid. And the other is connected to the storage box side, and the gas spring is provided with a stopper that prevents the rod from contracting when the rod protrudes from the case cylinder beyond a certain length. The lid opening and closing device is characterized.
[0009]
The stopper has a locking member in which one end is pivotally supported at the rod tip portion of the gas spring, and the other end is a pipe-shaped portion having a hole portion for loosely inserting the case tube,
It consists of spring means that tilts this locking member around the pivot point,
And the locking member can be realized by making the length from the pivot point to the outer end of the pipe-like portion smaller than the maximum protruding length of the rod from the pivot point, and at this time, the locking member is It is freely adjust a length of up to the outer end of the tubular portion from the pivot point.
[0010]
The storage box may be a battery storage box of a battery-type counterbalance forklift, and the lid may be preferably implemented as a cover of a battery storage box having a seat on the upper surface.
[0011]
[Action]
In the first aspect of the invention, as a result of the cover body being biased by the gas spring, the operation force required to open the cover body can be reduced and the operability can be improved. By projecting from the case cylinder beyond this length, the lid can be locked by preventing the rod from contracting, and the lid can be easily fixed without any special operation.
[0012]
Further in the present invention, the stopper, by using a locking member for loosely inserting the casing tube of the gas spring, can substantially integrated with gas spring, other that allows the size of the apparatus, the prior Kigakaritome member The fixing position of the lid can be easily changed by adjusting the length from the pivot point to the outer end of the pipe-shaped portion .
[0013]
The cover for opening and closing the battery storage box of the battery-type counterbalance forklift is preferably a relatively large and heavy object with a seat arranged on the upper surface, so that the present invention is preferably used for such a cover. At this time, it is not necessary to provide a member such as a stopper pin on the leg member of the head guard, which is useful for preventing a decrease in the strength of the head guard.
[0014]
【Example】
In the following embodiment of the present invention, the storage box is a battery storage box of a battery-type counterbalance forklift (hereinafter simply referred to as “forklift”), and the lid is employed as a cover of the battery storage box. Will be described with reference to the drawings.
[0015]
As shown in FIG. 1 and FIG. 2, the forklift F forms a battery storage box 2 that stores the battery BA and has an upper surface opened on the rear side of the vehicle body W, and the opening 2A of the battery storage box 2 is In this example, the rear end edge is pivoted on the upper surface of the vehicle body W by the pin P3, so that it can be opened and closed by the cover 3 which can be raised and lowered to a substantially vertical position. The forklift F has a well-known configuration provided with a mast device M provided with a fork 4 for cargo handling that moves up and down in front of the vehicle body W.
[0016]
The cover 3 is made of a metal material in this example, and is large enough to cover the opening 2A of the battery storage box 2 from the upper surface over the entire region, and a seat S on which the driver sits is disposed on the upper surface. For example, a large weight of 10 kg or more is achieved.
[0017]
Further, a gas spring 5 as shown in FIGS. 2 and 3 is interposed between the battery storage box 2 and the cover 3 to reduce the operating force required for the opening operation of the cover 3.
[0018]
The gas spring 5 includes a case cylinder 6 having a substantially cylindrical shape containing gas and the like, and a rod attached to the case cylinder 6 so as to be extendable and urged in an extending direction protruding from one end surface of the case cylinder 6. 7 is a known structure. Further, as will be described later, the gas spring 5 is provided with a stopper 9 that prevents the rod 7 from contracting when the rod 7 protrudes from the case cylinder 6 beyond a certain length. As shown in FIGS. 2 and 3, in this example, the locking member 10 and the spring means 11 are included, and the locking member 10 is adjustable in length from the pivot point to the outer end of the pipe-like portion. However, in FIGS. 2 and 3, the gas spring 5 is described in advance using a locking member having a constant length. An adjustable length is shown in FIG.
[0019]
In this example, the mounting portion 7a of the rod 7 is connected to the inner surface of the cover 3 with a pin P1, and the mounting portion 6a of the case cylinder 6 is connected to the battery storage box 2 side with a pin P2. Although illustrated, the reverse, that is, the rod 7 may be connected to the battery storage box side and the case tube 6 may be connected to the cover 3.
[0020]
Further, the pin P2 that connects the case cylinder 6 and the battery storage box 2 is arranged in a different position forward and downward with respect to the pin P3 that connects the cover 3 and the upper surface of the vehicle body. Accordingly, when the cover 3 is closed from the opened state, the rod 7 of the gas spring 5 is pushed and shrunk to the case cylinder 6 so that the cover 3 is always urged to open the opening 2A of the battery storage box 2. As a result, the operation force accompanying the opening operation of the cover 3 can be reduced.
[0021]
The term “gas spring” used in this specification is sufficient if gas is used as at least a part of the buffer material or the urging means, and in addition to the gas, one or two of liquid, mechanical spring, etc. It is defined as including everything that is composed of more than one species.
[0022]
Next, the gas spring 5 is provided with a stopper 9 for preventing the rod 7 from contracting when the rod 7 protrudes from the case cylinder 6 beyond a certain length.
[0023]
As shown in FIGS. 2 and 3, the stopper 9 is composed of a locking member 10 and a spring means 11 in this example, and can be integrated with the gas spring 5 to contribute to space saving. doing.
[0024]
That is, the locking member 10 is pivotally supported at one end at the tip of the rod 7 of the gas spring 5 by a small-diameter shaft 12, and the other end is loosely inserted into the case cylinder 6. It is formed as a pipe-like portion 14 having a hole portion 13, and in this example, a pipe-like shape is formed over almost the entire length, and the rod can also be inserted.
[0025]
Further, the locking member 10 has an axial length Lp (shown in FIG. 2) from the pivot point (shaft center) of the shaft 12 to the outer end of the pipe-like portion 14, and the maximum protrusion of the rod 7 from the pivot point. The length is smaller than the length Lm (shown in FIG. 2). Further, in this example, the rod 7 of the gas spring 5 is set to a substantially maximum protruding state in the position where the cover 3 is opened in a substantially vertical state. Therefore, in this state, the outside of the pipe-like portion 14 is set. The end is substantially separated from the case cylinder 6.
[0026]
Next, the spring means 11 is fixed to the inner surface of the locking member 10 and in the vicinity of the shaft 12 in this example by fixing one end of the leaf spring 15 with a screw 16 so that the other end of the leaf spring 15 is An example is shown in which the locking member 10 can be tilted in one direction around the pivot point in the direction of the arrow as shown in FIG.
[0027]
As shown in FIG. 2, the opening / closing device configured as described above is such that the rod 7 of the gas spring 5 protrudes at the maximum position when the cover 3 is in a substantially vertical state and is at its maximum open position (indicated by a one-dot chain line). The outer end of the pipe-like portion 13 of the locking member 10 is detached from the case tube 6.
[0028]
At the same time, the outer end portion of the pipe-like portion 13 firmly contacts the rod 7 by the spring means 11. After that, for example, when the protrusion length from the pivot point of the rod is substantially equal to the axial length Lp of the locking member 10 due to tilting in the direction in which the cover 3 is closed due to its own weight, for example. The contraction of the rod 7 is prevented by the pipe-like portion 14 of the locking member 10.
[0029]
That is, the cover 3 does not require any special operation, and only opens and is locked at a position in which the cover 3 is tilted substantially vertically with respect to the battery storage box 2. Can be greatly improved.
[0030]
When the cover 3 is closed, the locking member 10 is resisted by the spring means 11 and the hole 13 is tilted in the direction in which the case cylinder 6 is inserted, thereby preventing the lock 7 from being prevented from shrinking. By retracting the rod 7, the cover 3 can be returned to the closed position. At this time, it is preferable that the cover 3 is tilted by a small amount in the opening direction so that the outer end of the pipe-like portion 14 and the end surface of the case cylinder 6 are separated, and the locking member 10 at this time is tilted. In order to improve the operability, it is desirable to form an operation portion 14A having an outer diameter bulged in the pipe-shaped portion 14 as shown in FIG.
[0031]
It should be noted that the rod is from the state of the maximum protrusion length by an amount substantially equal to the difference dL (= (Lm−Lp)) between the maximum protrusion length Lm of the rod 7 and the axial length Lp of the locking member 10. Can shrink. Accordingly, if the difference dL is too small, the pipe-like portion 14 tends to be twisted with the end surface of the case cylinder 6 and the above-mentioned operation tends to be prevented.
[0032]
Conversely, if the difference dL is too large, it is dangerous to increase the amount of movement in the closing direction from the maximum open / close state of the cover 3 until it is locked. Therefore, the difference dL is preferably about 5 to 20 mm.
[0033]
FIG. 4 shows the gas spring 5 used in the present invention in which the length of the locking member 10 can be adjusted. The locking member 10 is a first pipe-like engagement having a male thread portion 17 formed on the outer peripheral surface. A stop-shaped member 10A and a pipe-shaped portion that is formed on the inner peripheral surface with a female screw portion 19 that can be screwed to the first locking member 10A and can be fixed to the first locking member 10A with a lock nut 20 It is comprised from the 2nd latching member 10B.
[0034]
As a result, the length from the pivot point that is the center of the shaft 12 of the locking member 10 to the outer end of the pipe-like portion 13 can be freely adjusted by the screw retraction amount ds of the second locking member 10B. As a result, the fixing position of the cover 3 can be easily fine-adjusted due to various parts accuracy errors such as the mounting part of the cover 3 and the vehicle body W. As a result, the fixing position of the cover 3 can be changed as appropriate. sell.
[0035]
It should be noted that, in addition to the means for moving the first and second locking members forward and backward using the screw means as described above, a structure in which both can be directly slid in the axial direction and fixed at an arbitrary position can be adopted as appropriate. .
[0036]
In addition, in this embodiment, the locking member 10 is exemplified by a pipe-like overall length, but besides this, as shown in FIG. 5, only the outer end is a pipe-like portion 22 having a notch 21 or the like, The other end having the attachment portion 25 attached to the rod 7 may be connected to the link 23, and one end of the locking member 10 is pivotally supported at a fixed position other than the rod, and the coil spring 24 is used as the spring means. In addition to providing a convex portion in which the diameter of the rod 7 is locally projected, one end of the locking member 10 is pivotally supported on the case cylinder 6 and the other end is brought into contact with the rod 7 to reverse the embodiment. It is possible to obtain the same action in any aspect such as the configuration.
[0037]
In addition to the battery storage box and its cover of the forklift, the present invention includes, for example, an engine hood cover of an engine-type forklift, a trunk part of a passenger car, a bonnet part, a train battery case, a household underfloor storage, etc. The present invention can be modified in various ways.
[0038]
【The invention's effect】
As described above, according to the first aspect of the present invention, when the protruding amount of the rod due to the opening operation of the lid exceeds a certain length, the lid can be fixed in the open state, so that no special operation is required. The operability of opening and closing can be greatly improved.
[0039]
Matas stopper, by using a locking member for loosely inserting the casing tube of the gas spring, can substantially integrated with gas spring, other that allows the size of the apparatus, from the pivot point of the front Kigakaritome member By adjusting the length of the pipe-like portion to the outer end, the fixing position of the lid can be easily and appropriately changed.
[0040]
Furthermore, when the battery-type counterbalance forklift battery storage box and this cover are adopted, it is not necessary to provide a member such as a stopper pin on the leg member of the head guard, which helps to prevent the strength of the head guard from being lowered.
[Brief description of the drawings]
FIG. 1 is a side view of a forklift showing an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view showing a main part of a battery storage box.
FIG. 3 is a perspective view showing an embodiment of a gas spring and a stopper.
FIG. 4 is a cross-sectional view showing another embodiment of the stopper.
FIG. 5 is a perspective view showing another embodiment of the locking member.
FIG. 6 is a perspective view illustrating a conventional battery storage box opening and closing device.
FIG. 7 is a partial enlarged view of a conventional battery storage box opening and closing device as viewed from the side;
FIG. 8 is a partially enlarged view of a conventional battery storage box opening and closing device viewed from the rear.
[Explanation of symbols]
2 Battery storage box 3 Cover 4 Fork 5 Gas spring 6 Case cylinder 7 Rod 9 Stopper 10 Locking member 11 Spring means 12 Shaft 13 Hole 14 Pipe-shaped portion 15 Plate spring 16 Screw F Forklift BA Battery S Seat

Claims (3)

An opening and closing device for a lid that opens and closes an opening provided in an upper portion of the storage box using a lid that is pivotally supported at one end edge so as to be freely tilted,
One of the case cylinder or the rod of the gas spring having a case cylinder and a rod attached to the case cylinder so as to be extendable and projecting from one end surface of the case cylinder in an extending direction is used as the lid. Connect, and connect the other to the storage box side,
Moreover the gas spring, by projecting from the case cylinder the rod beyond a certain length, Rutotomoni provided a stopper for preventing the shrinkage of the rod,
The stopper is
One end portion is pivotally supported at the rod tip portion of the gas spring, and the other end portion is a locking member having a pipe-like portion into which the case tube is loosely inserted, and
It consists of spring means that tilts this locking member around the pivot point,
And the locking member has a length from the pivot point to the outer end of the pipe-shaped portion smaller than the maximum projecting length of the rod from the pivot point,
And the said locking member is an opening / closing apparatus of the cover body which can adjust the length from the said pivot point to the said outer end of a pipe-shaped part . The locking member has a pipe-shaped first locking member having a male screw portion formed on the outer peripheral surface, and a female screw portion that can be screwed to the first locking member on the inner peripheral surface and is locked. 2. The lid opening / closing device according to claim 1, further comprising: a pipe-shaped second locking member that can be fixed to the first locking member with a nut. The lid opening / closing device according to claim 1 or 2 , wherein the storage box is a battery storage box of a battery-type counterbalance forklift, and the lid is a cover of a battery storage box having a seat on the upper surface.

Images