JPH02132317A - Length measuring instrument - Google Patents

Abstract

PURPOSE:To measure the length of even a nonrigid body which differs in reference length speedily and accurately by one device by allowing the measuring instrument which has an abutting member, a target member, etc., fitted to a rod suspended between the upper parts of columns in a swinging state to move forth and back in the axial direction of the nonrigid body. CONSTITUTION:A long-sized filter plug 1 to be measured is stored in the storage part 2 of a measurement base 4 so that one end of a moving holder H, etc., is fixed axially. When the length l of the filter plug 1 is measured, a moving base 7 is moved to a position corresponding to the length. The displacement S0 of the abutting member 14 when the abutting member 14 fitted to the rod 13 suspended between the upper parts of the columns 11a and 11b in the swinging state moves back by abutting on the filter plug 1 is equal to the displacement S of a target member 16. The length l of the filter plug 1 goes to therefore S0+L0=S0+L0, so the displacement S of the target member 16 is detected by a sensor 18 to measure the length of the filter plug 1.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a length measuring device, and more particularly, the present invention relates to a length measuring device, and more particularly, it is capable of automatically measuring the length of various non-rigid objects such as cigarette filters, cigarettes, and cigars. The present invention relates to a length measuring device useful for measuring length.

[Prior Art and Problems to be Solved by the Invention] Conventionally, the length of a long regular body with relatively large regularity has been measured using a measuring instrument such as a caliper.

However, when a non-rigid body such as the above-mentioned cigarette filter is held between the calipers and the length of the non-rigid body is measured, the length of the non-rigid body is greatly deformed due to fluctuations in the pressing force during measurement, and the measurement results vary widely. Therefore, it is difficult to quickly and accurately measure the length of a cigarette filter, etc. using the above measuring device.

On the other hand, the production volume of tobacco filters, cigarettes, etc. is enormous. In addition, strict quality control is required regarding the length of cigarette filters and the like during their manufacture and when shipping and receiving the products.

In other words, the winding and loading of cigarette filters, etc. is performed continuously and automatically, so in order to perform the above operations smoothly, the length of cigarette filters, etc. must be accurately and quickly measured, and the length of cigarette filters, etc. It is necessary to keep the length within predetermined control limits.

In view of the above points, one of the present applicants previously proposed a length measuring device for a non-rigid body (Japanese Patent Laid-Open No. 55-14900
Publication No. 1). FIG. 4 is a schematic side view showing a conventional length measuring device. This device includes a sample stage (24) in which a groove (23) is formed to fix one end of a long non-rigid body (21) with a stopper (22), and the other end of the non-rigid body (21). A fulcrum (25) provided above; an arm (26) swingably suspended from the fulcrum (25);
The first weight (27) is attached to the tip of the non-rigid body (21) and is capable of contacting the other end of the non-rigid body (21). In order to move the rigid body (21) to the other end, a second weight (28) is attached to the arm (26), and a first weight (28) is attached to the arm (26).
A sensor (29) that detects the position of the sample stage (27)
24).

According to the above length measuring device, a non-rigid body (2
1) When measuring the length, the first weight (27)
is in contact with the other end of the non-rigid body (21), and the sensor (29) detects the displacement j of the first depression (27), thereby determining the length L of the non-rigid body (21). Ten J can be measured.

However, the above measuring device is fixed and the sample stage (24
), so if the reference length of the non-rigid body (21) is different, it is difficult to quickly and accurately measure the length according to the reference length of the non-rigid body (21). More specifically, for example, in the case of a cigarette filter, a standard length of 102 mm or 120 mm is adopted depending on the type. Therefore, in order to measure the length of cigarette filters with different reference lengths, it is necessary to prepare multiple measuring devices depending on the type of cigarette filter, and one device can measure the length of cigarette filters with different reference lengths. It is difficult to measure the length accurately.

The purpose of the present invention is to
It is an object of the present invention to provide a length measuring device capable of quickly and accurately measuring length with one device.

[Means and effects for solving the problem] The present invention is a device for measuring the length of a long non-rigid body that is housed in a housing part of a measuring table in an immovable state in one axial direction. , the device is provided with a strut erected on both sides of the non-rigid body in the axial direction, a rod swingably suspended between the upper portions of the strut, and a tip of the rod; a contact member that contacts the end of the rigid body; a target member that is continuously thrown integrally with and facing the corresponding contact member; and a target member that is attached to an opposing location of either the target member and the above-mentioned support and that is connected to the target member. The above problem is solved by a length measuring device which has a sensor that detects the distance to the support column and can move forward and backward in the axial direction of the non-rigid body.

According to the length measuring device described above, since the measuring device can move forward and backward in the axial direction of the irregular body, even if the irregular body has a different standard length, the measuring device can be placed at a location according to the standard length. It can be moved and the length of a non-rigid object can be measured. Hereinafter, the operation of the length measuring device of the present invention will be explained based on FIG. 2, taking as an example a case where a cigarette filter (hereinafter referred to as a filter plug) is used as a non-enclosed body. FIG. 2 is a schematic side view showing the measurement state in an embodiment of the present invention, in which a moving stage for moving the device (a moving stage that advances the force and is attached to a swingably suspended rod (13)) is used. Contact member (1
4) is retracted by the immovable filter plug (1), that is, in the measurement position, the length of the filter plug (1) is J, and the distance between the abutting member (14) surface and the filter plug (1) before retracting is J. ) is the distance from the end of LO, LO
If the displacement of the abutment member (14) retreating from the position is SO, and the displacement of the target member (16) is S, then
4) and the target member (16) are always facing each other with a predetermined distance apart, so SO=S. Therefore, if the length of the filter plug is J, then J = SO + LO = S
It becomes +LO.

Then, a support column (
11a) includes a target member (16) and a column (11a).
), the length of the filter plug (1) can be measured by detecting S in the above equation with the sensor (18).

[Examples] The present invention will be described in more detail below based on Examples.

FIG. 1 is a perspective view showing one embodiment of the present invention, in which a long filter plug (1) is provided with a housing shaped like a V-shape or a U-shape that fits the filter plug (1). Part (2)
is housed stationary in one axial direction.

That is, the filter plug (1) is placed in this housing part (2).
) is formed with a wall portion (3) that fixes one end of the filter plug (1) in order to prevent the filter plug (2) from moving in one axial direction, and the housing portion (2) is placed on the measuring table (4). It is located in

A base (5) is arranged below the accommodating part (2) that accommodates the filter plug (1) in the axial direction of the filter plug (1). )
A moving table (7) that moves forward and backward in the axial direction is provided.

More specifically, side walls (6a) (6b) are erected at both longitudinal ends of the base (5), and the side walls (6a) (6b)
) A motor (8) as a rotational drive source is disposed outside one side wall (6b). Also motor (8)
A spiral body (9) is connected to the rotating shaft of the movable table (7) and inserted through the other side wall (6a).

Also, guide rods (10a) (10
b) are inserted, and the guide rods (10a) (10b)
Both ends are fixed to the side walls (6a) and (6b). Therefore, when the motor (8) is operated and the spiral body (9) is rotated in the forward and reverse directions, the spiral body (9) converts the rotational motion into linear motion and transfers the force to the guide rod (10a) (1).
The filter plug (1) can be moved forward and backward in the axial direction while being guided by the filter plug (1).

The forward and backward movement of the movable table is achieved by a spiral body that converts rotational motion into linear motion, a #li groove formed on the base, and a convex portion formed on the movable table that fits the dovetail. It may also be carried out with a sliding or sliding m-ellipse etc.

According to the forward and backward movement mechanism as described above, as shown in FIG.
When measuring the length of the filter plug (1), when transferring the filter plug (1) using the holder (H) etc., move the moving table (7) back to the original position, and after the filter plug (1) is stored in the storage part (2), During measurement, the movable table (7) can be advanced to the measurement position. Therefore, in the lateral direction, i.e. the moving platform (7)
The above-mentioned holder (H) moves in a direction perpendicular to the advance and retreat direction of
etc., the filter plug (1) can be smoothly transferred and the length of the filter plug (1) can be continuously measured.

In addition, even if the standard length of the filter plug (1) differs depending on the type, the measuring table (7) can be moved forward and backward.
Regardless of the standard length of the filter plug (1), the length can be measured at an appropriate position. In addition, when measuring the length according to the type of cigarette, the degree of advance according to the standard length of the filter plug (1) is stored in the ROM of the control unit, and the stored data and the rotation speed of the motor (8) are used. Based on this, the controller may control the forward and backward movement of the moving table (7).

Supports (11
a) (1lb) is erected. Also, the pillar (11
A support member (12) is pivotally mounted between the upper portions of a) (1 lb), and a rod (13) is swingably suspended from this support member (12). Note that the rod (13) does not need to be suspended from the support member (12), and the rod may be made into a T-shape, and both ends of the T-shaped rod may be rotatably attached to the support column. Good too.

A filter plug (1) is attached to the tip of the rod (13).
A flat plate-shaped contact member (14) that contacts the other end is attached, and among the corresponding contact members (14), the movable base +7
] A bending member (15) bent into a U-shape is attached to the side where the person leaves work. Further, a flat target member (16) facing the abutting member (14) is attached to the bending member (15).

Further, in order to prevent the abutting member (14) from moving toward the filter plug (1) by the target member (16) and maintain the hanging state, a rod (13) is installed between the pillars (11a and 1lb). A regulating member (17) that comes into contact with is attached.

Then, the target member (
A non-contact minute displacement sensor (18) for detecting the distance between the support column (11a) and the target member (16) is attached at a location facing the support column (16). Further, on the upper surface of the wall portion (6b) on the side where the motor (8) is disposed, there is provided the movable table (7).
An origin switch (19) is provided in order to stop the movement of the moving base (7) at the origin position when the movable table (7) is retracted.

Therefore, as shown in FIG. 2, when the moving platform (7) is advanced beyond the standard length of the filter plug (1), the abutment attached to the swingably suspended rod (13) Since the member (14) retreats rearward, the filter plug (1
) length J=S+LO can be measured. At this time, the contact member (14) etc. move forward and backward together with the movable base (7), and the movable base (7) can be returned to the origin position by the origin switch (19), so that the filter plug (1) Even if the reference lengths are different, the length of the filter plug (1) can be measured quickly and accurately.

In addition, in order to be able to quickly respond to filter plugs (1) having different reference lengths, it is preferable to set the origin position of the movable table (7) as follows. This origin position is shown in Figure 3 (^
) As shown in (B), if I is the moving distance of the movable platform (7) that can quickly respond to filter plugs (1) with different standard lengths, then C=L+I (C is a fixed value). set to the position. More specifically, when adapting to a filter plug (1) with a length of 60 to 150 mm, the standard length L=
For 120IIlm filter plug, C>150mm
It is set so that the

Further, if the distance from the end of the filter plug (1) housed in an immovable state to the surface of the abutment member (14) at the above origin position is T (fixed value), T-I+LO = (, -L+LO, LO =L+(T-C).In addition, LO is the standard length L of the filter plug (1)
It depends. Also, since T and C are fixed values, (T
-C) is also a fixed value.

In addition, in the state shown in FIG. 2, as mentioned above, the abutment member (14) is retracted by the stationary filter plug (1), so L>LO, and T-C becomes a negative fixed value. . If we replace T-C with A, the above formula becomes LO=
It becomes L-A. Therefore, even if the reference length of the filter plug (1) is different, LO indicates a constant distance from the reference length.

As mentioned above, by repeating the cycle of advancing the contact member (14) etc. to the measurement position together with the moving table (7) and returning the moving table (7) to the original position after measurement, the filter plug (1) Even if the reference lengths of the filter plugs (1) are different, the length of the filter plug (1) can be measured quickly and accurately.

Note that the abutting member and the target member may be integrally connected to each other in a state in which they can swing between the supports without intervening a bending member, and in a state in which they face each other. Further, an appropriate number of regulating members may be provided. Furthermore, the sensor
It suffices if it is attached to an opposing location of either the target member or the above-mentioned support in an area where the distance between the target member and the support can be detected. Further, a side plate facing the target member may be provided in series with the support column, and a sensor may be attached to the side plate within a range that does not impede the swinging of the abutting member.

[Effects of the Invention] As described above, according to the length measuring device of the present invention, the abutting member is provided on the rod swingably suspended between the upper parts of the supports, and the target facing the abutting member is provided with the abutting member. It has a sensor that detects the distance between the member and the support column, and the measuring device can move forward and backward in the axial direction of the non-rigid body, so even if the reference length of the non-rigid body is different, one device can be used. You can measure length quickly and accurately.

[Brief Description of the Drawings] Fig. 1 is a perspective view showing a practical example of the present invention, Fig. 2 is a schematic side view showing a measurement state in an embodiment of the present invention, and Fig. 3 (^) (B ) is a schematic side view of an embodiment of the present invention, not showing forward and backward movement, and FIG. 4 is a schematic side view of a conventional length measuring device.

Claims (1)

[Claims] A device for measuring the length of an elongated non-rigid object housed in an accommodating section of a measuring table in an immovable state in one axial direction, the device comprising: a length of a long non-rigid object housed in an accommodating section of a measuring table, the device measuring the length of an elongated non-rigid object that is fixedly housed in an accommodating part of a measuring table; A pillar is erected, a rod is swingably suspended between the upper part of the pillar,
A contact member provided at the tip of the rod and in contact with the end of the non-rigid body; a target member integrally connected to and facing the contact member; and any of the target member and the support. 1. A length measuring device, characterized in that the device has a sensor attached to one of the opposite positions and detects the distance between the target member and the support column, and the device is movable forward and backward in the axial direction of the non-rigid body.