JP4522483B1 - Foot switch guard - Google Patents

Abstract

Provided is a foot switch guard that can reduce the probability of erroneous operation by two switch operations in a foot switch, and can perform a smoother and more reliable switch operation in a simpler form.
SOLUTION: A switch cover 11 in which a foot switch 10 is housed and an operator can insert a foot tip and perform a stepping operation is provided on the front surface, and a switch cover 11 is provided integrally with the switch cover 11. The base 12 is fixed to the base 12 and is provided on both sides of the switch cover 11 and in front of the switch cover 11 so as to extend in the vertical direction, and stoppers 21 and 22 are provided at the upper and lower ends. Both ends are guided by the pair of guide pillars 20 and 20 and the pair of guide pillars 20 and 20 so as to be movable up and down, and are arranged in a horizontal manner on the front surface of the opening 11 a of the switch cover 11. The guard member 30 is provided.
[Selection] Figure 1

Description

  The present invention provides a foot having a switch cover as a basic component that covers at least the upper side and both sides of the foot switch and has an opening in the front so that an operator can insert and step on the foot. Regarding switch guard.

Conventionally, in order to prevent erroneous operation of a machine tool (work machine) such as a press brake operated by a foot switch, a box-type switch cover is provided. According to this, the operator does not carelessly press the foot switch, and erroneous operation of the work machine can be prevented.
However, even if this switch cover is provided, if the foot gets inside the cover, the switch will be turned on, and if there is a hand between the molds, there is a risk of injury. In other words, since the switch operation itself is based on one operation, there is a limit to further reducing the probability of an erroneous operation that occurs when the operator unintentionally depresses the foot pedal. Furthermore, in the case of a press brake that bends a sheet metal material, the operator operates the machine while holding the material with both hands.

On the other hand, a footstand having the following configuration has been proposed so as to reduce the erroneous operation by changing the switch operation into two operations.
The internal space of the stand base (switch cover) is divided into left and right by a partition plate. A driving foot pedal is provided in the inner space on the right side to perform a stepping operation when lowering the ram. The foot pedal lowers the ram only when the operator is depressed. When you stop stepping on the foot pedal, the ram stops descending when it stops and holds the stop position. A switch that enables the foot pedal to be depressed is provided on the right inner space. The switch is turned on by the operator's right foot before the operator depresses the foot pedal, thereby enabling the foot pedal depressing operation. According to this, even when the operator accidentally steps on the driving pedal for lowering the upper mold, the upper mold can be prevented from lowering (see Patent Document 1).

JP2007-7702 (first page)

The problem to be solved with respect to the foot switch guard is that even in the form of the prior art, the switch operation is two operations and the probability of erroneous operation can be further reduced. There is a problem that the workability becomes worse due to the complexity.
Accordingly, an object of the present invention is to provide a foot switch guard that can reduce the probability of erroneous operation due to two switch operations in the foot switch, and can perform a smoother and more reliable switch operation in a simpler form. There is to do.

The present invention has the following configuration in order to achieve the above object.
According to one aspect of the foot switch guard according to the present invention, at least the upper and both sides of the foot switch are covered, and an opening is provided in the front so that an operator can insert and step on the foot. A switch cover, a base provided integrally with the switch cover, and a base fixed to the base, provided on both sides of the opening of the switch cover and in front, extending in the vertical direction and having upper and lower ends A pair of guide pillars provided with stoppers for retaining at the parts, and both ends are guided by the pair of guide pillars so as to be movable up and down, and horizontally in front of the opening of the switch cover. And a guard member arranged so as to be bridged.

Moreover, according to one form of the foot switch guard concerning this invention, the linear bearing is fixed to each of the both ends of the said guard member, The said guide pillar part is penetrated to this linear bearing, It is characterized by the above-mentioned. Can do.
Further, according to one aspect of the foot switch guard according to the present invention, the base is integrally provided by being fixed to the top plate portion of the switch cover, and the guide pillar portion extends downward from the base. And the lower end is provided in a state of floating from the arrangement floor.

Moreover, according to one form of the foot switch guard concerning this invention, the said guide pillar part is provided by being fixed to the U-shaped attachment member fixed to the lower surface of the said base. Can be a feature.
Further, according to one aspect of the foot switch guard according to the present invention, the guard member includes a guard bar provided in a bar shape, and a connecting portion at both ends where both ends of the guide bar are rotatably connected. , And the linear bearings attached to the respective connecting portions.

Moreover, according to one form of the foot switch unit concerning this invention, it is provided with the foot switch provided with said foot switch guard.
Moreover, according to one form of the machine tool concerning this invention, it is provided with the foot switch provided with said foot switch guard.

  According to the foot switch guard according to the present invention, the switch operation in the foot switch becomes two operations and the probability of erroneous operation can be further reduced, and the smoother and more reliable switch operation can be performed in a simpler form. It has a special advantageous effect.

It is a perspective view which shows the example of a form of the foot switch guard which concerns on this invention. It is a front view of the example of a form of FIG. It is a side view of FIG. It is a front view which shows the other example of a foot switch guard which concerns on this invention. It is a side view of the example of a form of FIG. It is a top view of the example of a form of FIG. It is a side view explaining the function of the foot switch guard concerning the present invention. It is a side view explaining the operation method of the foot switch guard which concerns on this invention. It is a side view explaining the action | operation process of the foot switch guard which concerns on this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a foot switch guard according to the present invention will be described in detail based on the attached drawings (FIGS. 1 to 6). 1 to 3 is configured by a box-shaped switch cover 11 in which two foot switches (a switch pedal for lowering the ram and a switch pedal for raising the ram) are housed. The embodiment shown in FIGS. 4 to 6 is configured by a box-shaped switch cover 11A in which one foot switch is accommodated. In FIG. 2 and FIG. 4, the foot switch is omitted.
This foot switch guard is in a machine tool such as a press brake where a worker operates the foot switch 10 while holding a work with both hands, and the operator operates the foot switch 10 by unintentionally stepping on the foot switch 10. It is used in order to prevent this and improve safety. Moreover, the apparatus provided with the foot switch 10 provided with this foot switch guard becomes the foot switch unit 100 (refer FIG. 1).

The switch cover 11 covers at least the upper side and both sides of the foot switch 10 and also has an opening 11a on the front side so that an operator can insert and step on a toe portion (foot tip) of the foot on which the shoe is worn. Is provided.
The switch cover 11 of this embodiment is formed in a rectangular box shape, and the entire front surface is an open port 11a.

Reference numeral 12 denotes a base, which is provided integrally with the switch cover 11.
The base portion 12 of this embodiment is a long material having a U-shaped cross section. In the embodiment shown in FIGS. 1 to 3, the base portion 12 is directly placed on the top plate portion 11 b of the switch cover 11. It is fixed by screws and integrated. More specifically, one side portion 12a of the base portion 12 made of a long material is fixed in a protruding state in front of the opening 11a, and both end portions of the base 12 protrude to both sides of the opening 11a. It is formed as follows. Moreover, one side part 12a of the base 12 is substantially the front upper edge of the opening 11a of the switch cover 11, and is a part that appropriately restricts the entry of the operator's foot.

Reference numeral 20 denotes a guide pillar, a pair of which is fixed to the base 12 and is disposed on both sides of the opening 11a in front of the opening 11a of the switch cover 11 and extends in the vertical direction and has upper and lower ends. Are provided with stopper portions 21 and 22 for preventing them from coming off. For this reason, a pair of guide pillar part 20 is distribute | arranged so that it may not block | close the open port 11a which an operator's foot tip can approach.
In this embodiment, the guide column portion 20 is provided by being fixed inside the U-shaped attachment member 15 that is fixed to the lower surfaces of both end portions of the base portion 12. Further, the horizontal bent portion at the upper end of the attachment member 15 is the stopper portion 21 at the upper end, and the horizontal bent portion at the lower end of the attachment member 15 is the stopper portion 22 at the lower end. According to this, while being able to fix the guide pillar part 20 reasonably, the upper and lower stopper parts 21 and 22 can be comprised.

Reference numeral 30 is a guard member, and both ends thereof are guided by a pair of guide pillars 20 and 20 so as to be movable up and down, and are arranged extending horizontally in front of the opening 11 a of the switch cover 11. Is provided.
The guard member 30 is smoothly guided by the pair of guide pillars 20 and 20 so that it can be lifted up easily by prying it between the bottom plate of the box-shaped switch cover 11. be able to. Further, when the foot that lifts the guard member 30 is removed from the switch cover 11, the guard member 30 descends by its own weight and returns to the original position in a stable state where it abuts against the stopper portion 22 at the lower end. .
In a state where the guard member 30 is in contact with the stopper portion 22 at the lower end, even when the operator puts the foot tip through the gap between the upper portion of the guard member 30 and the top plate portion 11b of the switch cover 11, at least the operator Are in a positional relationship where the foot switch 10 cannot be stepped on unintentionally.

  Further, the base portion 12 of this embodiment is fixed and integrally provided on the top plate portion 11b of the switch cover 11, and the guide column portion 20 is formed so as to extend downward from the base portion 12 via the attachment member 15. Thus, the lower end is provided in a state of floating from the arrangement floor surface. By being formed in this way, depending on only the form of the switch cover 11, the foot switch unit can be suitably arranged on the floor surface, and the height position when the guard member 30 is lowered is rationalized. Can be set automatically.

In this embodiment, linear bearings 32 are fixed to both ends of the guard member 30, and the guide column 20 is inserted through the linear bearings 32. Reference numeral 32a denotes a connecting portion, which is provided as both end portions of the guard member 30, and to which a linear bearing 32 is attached. According to this, the guard member 30 is suitably guided by the guide column part 20 and can move up and down extremely smoothly.
It should be noted that the means for smoothing the vertical movement of the guard member 30 relative to the guide column portion 20 is not limited to this, and it is needless to say that other existing sliding members can be selectively used as appropriate.

Further, in this embodiment, the guard member 30 includes a guard bar 31 provided in a bar shape, both end portions of the guard bar 31 that are rotatably connected to each other, and each of the connecting portions 32a. And a linear bearing 32 mounted on the. In addition, the guard bar 31 of the present embodiment is formed of a pipe material and is reduced in weight.
Since the guard member 30 is formed in this way, the operator can easily lift the guard member 30 with the foot tip, and can suitably perform an operation of stepping on the foot switch 10 with the foot tip.

  Note that the form of the guard member 30 is not limited to this. For example, as a bridging member that is fixed so as not to rotate instead of the guard bar 31, the lower end of the guard member 30 smoothly enters the switch cover 11. The upper surface portion can be provided in a concavo-convex shape that can be noticed by the feel of the toes.

  According to the foot switch guard having the configuration described above, the guard member 30 is arranged so that the foot switch 10 cannot be operated in a normal operation from the lower gap or the upper gap of the guard bar 31. (See FIG. 1). That is, a suitable obstacle (guard member 30) is arranged in front of the foot switch 10. If the obstacle (guard member 30) is not in a state in which the obstacle is disabled with the foot tip that operates the foot switch 10, the foot switch 10 cannot be operated with the foot tip. That is, when the intended operation is performed, the foot switch 10 at the back cannot be operated unless the guard bar 31 is moved upward by the tip of the foot. 2 and 3 show a state where the guard member 30 including the guard bar 31 is moved upward. The guard bar 31 automatically returns to the initial position by its own weight when the foot is pulled out (see FIGS. 1 and 4 to 6).

  Thus, according to this foot switch guard, since the stepping operation of the foot switch 10 has two operations, the operation cannot be performed unless intended. Accordingly, it is possible to reliably prevent the machine from operating by stepping on the foot switch 10 unintentionally.

By the way, as shown in FIG. 1, the foot switch guard of this embodiment can be appropriately configured on a conventional foot switch stand by retrofitting. Reference numeral 18 is a stand bar, and 19 is a manual stop switch.
Further, a small switch cover 11 </ b> A in which one foot pedal as shown in FIGS. 4 to 6 is accommodated can be suitably configured by fixing the base 12 via the attachment 40.

Moreover, as shown in FIG. 1, 33 is a buffer member, and is arranged on the upper surface of the stopper portion 22 at the lower end. This is a cushioning material that receives the linear bearing 32 when the guard member 30 descends, relieves its impact, and silences, and can be formed of a rubber material or the like. The buffer member 33 is also a member that adjusts the height position of the guard member 30.
Furthermore, by providing a buffer member on the lower surface of the stopper portion 21 at the upper end, it is possible to mitigate the impact when the linear bearing 32 abuts and to mute the impact sound. Moreover, it can also arrange | position in order to restrict | limit the movement range of the guard member 30. FIG.

Next, based on FIG. 7 to FIG. 9, the operation method and effects of the foot switch guard according to the present invention are described as follows: the position of the shoe 50 of the worker with respect to the foot switch 10, one side portion 12 a of the base portion and the guard bar 31. This will be described in detail by showing the relationship.
First, as shown in FIG. 7, when the guard bar 31 that is not required to step on the foot switch 10 is positioned at the lower end, the guard bar 31 is simply moved to the guard bar 31 if the foot tip is moved (slid) forward. Just hit and can't push up. Therefore, you can't put your feet in unintentionally.

Then, when the foot switch 10 is depressed, an operation as shown in FIG. 8 is performed.
First, as shown in FIGS. 8A to 8B, the guard bar 31 can be lifted by performing an operation of moving the toes forward while scooping up the heel and scooping up the guard bar 31 with the toes. . The guard bar 31 cannot be lifted by unintended one-way operation.
At this time, if the guard bar 31 is rotatable, an operation of inserting a toe (an operation of prying) is easy to perform. Further, since both ends of the guide bar 31 are held by the linear bearing 32 having a small sliding resistance, the operation of lifting the guide bar 31 does not become a burden on the operator.
Next, as shown in FIG. 8C, after further moving the foot forward, an operation of stepping on the foot switch 10 is performed. At this time, when the positional relationship is such that the ankle touches one of the side portions 12a of the base, the foot switch 10 can be suitably depressed.
Then, after the stepping-in operation is completed, as shown in FIG. 8D, when the operator retracts the foot and pulls out the tip of the foot, the guide bar 31 returns to the original lower end position by its own weight.

Next, as an operation unintended by the operator, the fact that an unintended switch operation is not performed when a foot tip is inserted above the guard bar 31 will be described with reference to FIG.
FIG. 9A shows a state before the operator's operation is performed, and the guard bar 31 is positioned at the lower end.
As shown in FIG. 9 (b), if the operator puts a toe from the upper side of the guide bar 31, the toe does not reach the foot switch 10 while the heel is grounded. The foot switch 10 is basically designed to be operated with the heel grounded.
Then, as shown in FIG. 9C, when the foot is further moved forward with the heel lifted, the ankle hits one side portion 12a of the base, and the foot can be moved further forward. Can not. It should be noted that at this point in time, the worker may be aware of an unintended abnormal operation.
Further, as shown in FIG. 9 (d), in order to touch the foot switch 10 with the ankle hitting one of the side portions 12a of the base, the heel must be raised and the toes lowered deeply. Don't be. It is considered impossible to perform such an operator's operation in an unintended state. Moreover, it is very difficult to perform the operation of raising the heel and lowering the toes deeply due to the positional relationship between the one side portion 12a of the base portion and the guard bar 31, and such an operation cannot be practically performed. Designed to.

  As described above, the present invention has been variously described with reference to preferable examples of the machine tool. However, the present invention is not limited to the machine tool, and can be applied to various machines, devices, and equipment such as test machines and measuring instruments. It can be done. Further, the present invention is not limited to this embodiment, and it goes without saying that many modifications can be made without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 10 Foot switch 11 Switch cover 11A Switch cover 11a Opening port 11b Ceiling part 12 Base part 15 Mounting member 20 Guide pillar part 21 Upper end stopper part 22 Lower end stopper part 30 Guard member 31 Guard bar 32 Linear bearing 32a Connecting part 100 Foot switch unit

Claims (5)

A switch cover that covers at least the upper side and both sides of the foot switch, and has an opening in the front so that an operator can insert and step on the foot.
A base provided integrally with the switch cover;
A pair of guide pillars that are fixed to the base and are provided on both sides of the opening of the switch cover and in front, extending in the vertical direction and provided with stoppers for retaining at the upper and lower ends. When,
Both ends are guided by the pair of guide pillars and are provided so as to be movable up and down, and provided with a guard member that is arranged in a horizontal direction in front of the opening of the switch cover ,
The base is fixed and provided integrally with the top plate of the switch cover, the guide pillar is formed in a state extending downward from the base, and the lower end is provided in a state of being floated from the arrangement floor surface. And
The foot switch guard, wherein the guard member is constituted by a guard bar provided in a bar shape and the both end portions of the guard member to which both ends of the guide bar are rotatably connected . The both end portions of the guard member are configured by a connection portion in which both ends of the guide bar are rotatably connected to each other, and linear bearings attached to the connection portions, respectively. The foot switch guard according to claim 1, wherein the guide column portion is inserted.   The foot switch guard according to claim 1 or 2, wherein the guide column part is provided by being fixed to an attachment member having a U-shaped cross section fixed to a lower surface of the base part. The foot switch unit provided with the foot switch provided with the foot switch guard in any one of Claims 1-3 . Machine tool footswitch guard according to any one of claims 1 to 4, characterized in that it comprises a foot switch provided.

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