JP2000236796A - Switching device for opening shutter of rat-capturing trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switching device for the shutter that closes the trap inlet 9 by the shutter dropping with its self-weight in which the shutter can be kept open directly with a single lock spring and the open holder is constituted with a reduced number of parts through reduced man-hours for assembling with reduced hindrance. SOLUTION: The shutter 10 is kept open by connecting the movable top edge 13b of the lock spring 13 thereto. When a rat comes from the inlet 9, as the shutter 10 is opened, and steps on the pedal 14, the pedal 14 is swung downward around the horizontal shaft 15, accordingly the movable top edge 13b of the lock spring is pulled and elastically deformed toward the unlocked position whereby the connection with the shutter is released. The shutter 10 falls down with its self-weight after the connection release to close the inlet 9 and the rat is trapped in the cage 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a shutter opening / closing device for opening and closing an entrance of a mouse trap.

[0002]

2. Description of the Related Art A mouse trap of this kind is known, for example, from Japanese Utility Model Publication No. 63-31587. In this, a trap entrance 25 is provided with a mouse entrance 26 as shown in FIG. The entrance 26 is opened and closed by a vertically movable shutter 28 along the vertical groove 27. A tread plate 29 is provided at the bottom of the capture box 25 so as to be vertically swingable about a horizontal axis 30. A weight 31 for urging the tread plate 29 to a horizontal position is fixed to a base end of the tread plate 29 behind the horizontal shaft 30, and a bait nail 32 is provided upright at a front end of the tread plate 29 in front of the horizontal shaft 30. On the inner surface of one side plate 33 of the capture box 25, an operating plate 35 that can move up and down along a vertical guide groove 34, and a pair of left and right slides that can slide left and right along a horizontal guide groove 36. Sliding plates 37 and 38 are provided. The operation plate 35 is
Upward inclined portions 35a and 35b are provided on the left and right sides of the upper end, and the lower end of the operation plate 35 is rotatably pivotally connected to one end of the foot plate 29 via a pivot 39. Each of the sliding plates 37 and 38 has a pin 40 at one end for holding the shutter 28 in an open position, and the other end of the upwardly inclined portion 35a.
Downward inclined portions 37a and 38a are formed so as to be in contact with 35b, and are constantly pressed and urged toward the operation plate 35 by the pressing spring 41. The tread plate 29 is held in a horizontal posture by the weight 31 and the left and right sliding plates 37 and 38.

Now, the shutter 28 is lifted, and the locking piece 42 integrally provided at the lower end of the shutter 28 is
By engaging with 0, the inlet 26 is opened and this open state is maintained. When the mouse enters from the entrance 26 in the opened state and rides on the tread plate 29, the tread plate 2 in the horizontal posture
9 is tilted by swinging downward around the horizontal axis 30 by the load of the mouse. With this inclination, the operating plate 35 is pulled down, and the left and right sliding plates 37 and 38 slide in the direction of the operating plate 35 by the pressing spring 41 to move the pins 40 in the same direction. This pin 40
The shutter 28 descends by its own weight due to the movement of
Is closed, and the mouse is captured in the capture box 25.

[0004]

In the above-mentioned mouse catcher in which the shutter 28 is closed by its own weight, the shutter 28 is held open before the mouse is captured. A pair of sliding plates 37 and 38 slidable in the horizontal direction.
Operating plate 35 movable up and down, and sliding plates 37 and 38
And a pressing spring 41 that constantly presses and biases the operating plate 35 in the direction of the operating plate 35. However, the opening and holding means of the shutter 28 includes a pair of sliding plates 37.3.
8, a large number of members such as the operating plate 35 and the pressing spring 41 are required, the number of assembling steps is increased, and the entire structure is complicated, and it is easy to cause a failure.

Accordingly, an object of the present invention is to provide a mouse trap of the type in which the shutter is closed by its own weight, as described above, so that the shutter can be opened and held by a single lock spring member, thereby reducing the number of members and the number of assembly steps. It is an object of the present invention to provide a shutter opening / closing device for a mouse trap which can reduce the number of components and simplify the structure.

[0006]

According to the first aspect of the present invention, there is provided a shutter opening / closing device for a mouse trap, as shown in FIGS. 1 and 2, a trap box 1 having a mouse entrance 9;
A shutter 10 for opening and closing the entrance 9 and a tread plate 14 supported in a cantilever manner so as to be able to swing up and down around a horizontal axis 15 inside the capture box 1 are provided. In a mouse catcher provided so as to be closed, a movable tip portion 13b and a fixed base portion 13 which are elastically deformable are provided at positions near the shutter 10 of the capture box 1.
a fixed base portion 13a of the lock spring member 13 having a
The movable tip portion 13b of the lock spring member 13 is applied to the stepped plate 14 by a lock position where the movable distal end portion 13b is engaged with the shutter 10 in an open state by its own spring force. It is characterized in that it is configured to be elastically deformed over an unlock position in a direction in which engagement with the shutter 10 is released by receiving a mouse load via the connecting member 17.

The shutter opening / closing device for a mouse trap according to claim 2 is a trap box having a mouse entrance 9.
And a shutter 10 for opening and closing the entrance 9.
A fixed base 13a of a lock spring member 13 having an elastically deformable movable tip 13b and a fixed base 13a is fixed at a position near the shutter 10 of the capture box 1, and the movable tip 13b of the lock spring 13 is The capture box 1 is configured to elastically deform between a locked position where the shutter 10 is opened by its own spring force and an unlocked position where the engagement with the shutter 10 is released. A connection member 17 having one end connected to the movable tip portion 13b of the lock spring member 13 and the other end connected to a predetermined position in the capture box 1 is provided. The mouse inside the connection member 1
The movable tip 13b of the lock spring member 13 is provided in a substantially stretched state so that the movable tip 13b can be pulled in a direction of releasing the engagement with the shutter 10 when the hook 7 is hooked.

[0008]

In the mouse catcher according to the present invention, the shutter 10 with the movable distal end 13b of the lock spring member 13 opened.
, The open state is maintained. And
In the case of the mouse opening / closing device according to the first aspect of the present invention, when a mouse enters the entrance 9 and steps on the tread plate 14 with the shutter 10 opened, the tread plate 14 is lowered about the horizontal axis 15 by the treading load W. And the movable tip portion 13b of the lock spring member 13
, And is elastically deformed in the direction of the unlock position to release the engagement with the shutter 10. With this release, the shutter 10 falls by its own weight and closes the entrance 9, and the mouse is captured in the capture box 1.

Further, in the case of the shutter opening / closing device of the mouse trap according to the second aspect, when the mouse enters through the inlet 9 and hooks the connecting member 17 with the shutter 10 opened, the movable tip of the lock spring member 13 is moved. 13b is elastically deformed in the direction of the unlock position by the pulling action of the connecting member 17 to release the engagement with the shutter 10. With this release, the shutter 10 falls by its own weight and closes the entrance 9, and the mouse is captured in the capture box 1.

[0010]

1 and 2 show an embodiment of a shutter opening / closing device for a mouse trap according to the present invention.
FIG. 1 is a perspective view showing the mouse with its entrance opened, and FIG. 2 is a longitudinal side view thereof.

In each of the figures, a capture box 1 of a capture device includes a top plate 2, a bottom plate 3, and front, rear, left and right side plates 4, 5, 6, and 7.
Each face plate 2, 3, 4, 5, 6, 7 is made of a single material such as a metal plate, a wire mesh, a plastic plate, a wood board, paper, cloth, or a combination of two or more of these materials. .

The trap box 1 is provided with a mouse entrance 9 and a substantially fan-shaped shutter 10 for opening and closing the entrance. In the illustrated example, an entrance 9 is provided in the side plate 4, and a shutter 10 is provided outside the entrance 9 along an arc-shaped guide rail 12 so that the shaft 1 can rotate.
It is provided so that it can rotate up and down around one. Shutter 10
Is rotated downward by its own weight on the outer surface of the side surface 4 so that the entrance 9
Can be rotated around the shaft 11 in a closed position (in a two-dot chain line state in FIG. 2) and an open position (solid line state in FIG. 2) which overlaps a position above the entrance 9 of the side plate 4 by upward rotation.

At a position near the entrance 9 on the inner surface of the side plate 4,
A lock spring member 13 made of a metal leaf spring or a plastic material is provided to hold the shutter 10 open. The lock spring member 13 is fixed to the inner surface of the side plate 4 by a fixing plate 13 or a fixing base 13 fixed with screws or the like.
a, and an elastically deformable U-shaped movable tip portion 13b integrally extended from the fixed base portion 13a, and the movable tip portion 13b is bent at the foremost end into an L-shape.

The lock spring member 13 always projects the front end of the movable tip portion 13b outward from the entrance 9 toward the lock position by the spring force of the lock spring member 13 itself. Its movable tip 13
The leading edge of b locks the shutter 10 in the open position by engaging the lower edge 10a of the shutter 10 that is offset from the shaft 11 when the shutter 10 is in the open position. The movable tip 13b is released from engagement with the lower edge 10a of the shutter 10 when the movable tip 13b is elastically deformed in the direction toward the unlock position inside the entrance 9 by applying an external force against its own spring force. With this release, the shutter 10 falls by its own weight around the shaft 11 and closes the entrance 9.

On the bottom plate 3 inside the capture box 1, a tread plate 1
4 has a horizontal axis 15 extending over a substantially horizontal posture and an inclined posture.
The cantilever is supported so that it can swing up and down. Weight 200
~ 300g of gray and muddy rats as well as 15
In order to be able to catch a mouse of about 40 g, the tread plate 14 is placed in a substantially horizontal posture, and when a weight of 15 to 40 g corresponding to the light weight of the mouse is applied thereon, the horizontal axis It is set so as to swing downward about 15 and to incline (in a two-dot chain line state in FIG. 2).

The tread plate 14 has a thin column 16 standing thereon, and the column 16 and the movable tip 13b of the lock spring member 13 are connected by a connecting member 17 made of a chain or a string. When the tread plate 14 is tilted under the load W of the mouse, the movable tip portion 13b of the lock spring member 13 is elastically deformed toward the unlock position through the traction action of the connecting member 17, and the lower edge 10a of the shutter 10 is Is set to be released.

The shutter opening / closing device of the mouse trap is constructed as described above. When the shutter 10 is closed, the movable tip portion 13b of the lock spring member 13 is in elastic contact with the inner surface of the shutter 10. When the shutter 10 is rotated upward to remove the mouse, as soon as the lower edge 10a of the shutter 10 passes through the movable tip portion 13b, the movable tip portion 13b projects outward by its own spring force, and the shutter 10 And the shutter 10 is held open. The bait is sowed in a place other than the upper surface of the tread plate 14 inside the capture box 1 and placed.

Now, when the mouse enters through the open entrance 9 to eat the food in the catch box 1 and rides on the tread plate 14, the tread plate 14 is inclined around the horizontal axis 15 by the load W of the mouse. With this inclination, the movable tip portion 13b of the lock spring member 13 is elastically deformed in the direction of the unlock position by receiving the traction force of the connecting member 17, and comes off the lower edge 10a of the shutter 10. Then, the shutter 10 falls under its own weight around the axis 11, and the entrance 9 is closed by the shutter 10.

In the above-described embodiment, the opening and closing operation of the shutter 10 that closes the entrance 9 by its own weight falls is such that it opens and closes around the shaft 11, but is not limited to this. For example, as shown in FIGS. 3 and 4, the shutter 10 slides up and down straight along the vertical guide rails 20 on the side surface 4 having the entrance 9 of the capture box 1, or is not shown. May be slidably opened and closed in an oblique vertical direction.

As shown in FIG. 6, the upper end side of the shutter 10 is attached to the side surface 4 having the entrance 9 of the capture box 1 so as to be rotatable up and down around a shaft 22. The shutter 10 may be held in the open state by attaching the same lock spring member 13 and engaging the lower edge 10a of the open state of the shutter 10 with the movable tip portion 13b. still,
In this case, an intermediate portion of a connecting member 17 such as a string connecting the lock spring member 13 and the tread plate 14 passes through a guide roll 23 or a ring.

The leading end of the movable tip 13b of the lock spring member 13 is bent into a V shape as shown in FIG. 4 instead of being formed into an L shape as shown in FIG. Hole 21 drilled in capture box 1 separately from entrance 9
The lower edge 10a of the shutter 10 that is opened by projecting from
It can also receive and support. The movable tip 13b of the lock spring member 13 is bent into a cylindrical shape as shown in FIG.
b, the lower edge 10a of the shutter 10 in the opened state may be received and supported to lock and hold the opened state. In this case, the movable tip portion 13b is elastically deformed in the direction of the unlock position through the traction action of the connecting member 17 as shown in FIG. When the shutter 10 falls under its own weight and closes the entrance 9, the movable movable end 13b of the cylindrical shape is elastically returned to the lock position and the upper edge 1 of the shutter 10 is just moved.
0b. According to this,
The lock spring member 13 is used to prevent the shutter 10 from being accidentally opened by the captured mouse.
A function to close and lock 0 can also be provided.

[0022]

According to the first aspect of the present invention, the capture box 1
The movable tip portion 13b of the single lock spring member 13 connected to the inner tread plate 14 directly holds the open state of the shutter 10 that closes the entrance 9 by its own weight, so that the number of members and the number of assembly steps are small. Thus, the opening holding means of the shutter 10 can be configured, and the structure can be simplified and the number of failures can be reduced.

According to the second aspect of the present invention, the shutter that closes the entrance 9 by its own weight falls with the movable tip portion 13b of the single lock spring member 13 connected to the connection member 17 stretched in the capture box 1. Since the open state of the shutter 10 is directly held, the shutter 10 can be further reduced in the number of members and the number of assembly steps as compared with the case of the invention according to claim 1.
The opening holding means can be configured, and the structure can be simplified and the number of failures can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a shutter opening / closing device of a mouse trap according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional side view of a main part of a shutter opening / closing device of the mouse trap of FIG. 1;

FIG. 3 is a front view of a shutter opening / closing device of a mouse trap according to another embodiment.

FIG. 4 is a sectional view taken along line AA in FIG.

5A and 5B are cross-sectional views of a shutter opening / closing device of a mouse trap according to still another embodiment, in which FIG. 5A is a state diagram of an opened shutter, FIG.
(C) is a closed state diagram of a shutter.

FIG. 6 is a vertical sectional side view of a shutter opening / closing device of a mouse trap, showing still another embodiment.

FIG. 7 is a longitudinal sectional side view of a conventional mouse trap.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Capture box 9 Entrance 10 Shutter 13 Lock spring member 13a Fixed base 13b Movable tip 14 Tread plate 15 Horizontal axis 17 Connecting member

Claims (2)

[Claims] 1. A capture box 1 having a mouse entrance 9, a shutter 10 for opening and closing the entrance 9, and a tread plate 14 cantilevered in the capture box 1 so as to be swingable up and down around a horizontal axis 15. The mouse 10 is provided with a shutter 10 so that the entrance 9 is closed by its own weight. A movable tip 13b and a fixed base 13a which are elastically deformable are provided at positions near the shutter 10 of the capture box 1. The fixed base portion 13a of the lock spring member 13 having the following is fixed. The movable tip portion 13b of the lock spring member 13 and the tread plate 14 are connected by a connecting member 17. The movable tip portion 13b of the lock spring member 13 The lock position for engaging with the shutter 10 in the opened state by the spring force of itself and the load of the mouse applied to the tread plate 14 are received via the connecting member 17. The shutter 10
A shutter opening / closing device for a mouse trap, wherein the shutter opening / closing device is configured to elastically deform over an unlocked position in a direction in which the engagement with the mouse is released. 2. A mouse trap which has a trapping box 1 having a mouse entrance 9 and a shutter 10 which opens and closes the entrance 9. The shutter 10 is provided so as to close the entrance 9 by its own weight falling. The fixed base 13a of the lock spring member 13 having an elastically deformable movable tip portion 13b and a fixed base portion 13a is fixed at a position near the shutter 10 of the capture box 1, and the movable tip portion of the lock spring member 13 is fixed. 13b is configured to elastically deform over a lock position in which it is engaged with the shutter 10 in an open state by its own spring force and an unlock position in a direction in which the engagement with the shutter 10 is released. In the capture box 1, a connecting member 17 having one end connected to the movable tip portion 13 b of the lock spring member 13 and the other end connected to a predetermined position in the capture box 1. The connecting member 17 pulls the movable tip portion 13b of the lock spring member 13 in a direction of releasing the engagement with the shutter 10 when the mouse that has entered the capturing box 1 hooks the connecting member 17. A shutter opening / closing device for a mouse trap, wherein the shutter opening / closing device is provided substantially in a stretched state.