JP2003042701A - Method for attaching elastic member to tape measure case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for attaching an elastic member to a tape measure case by which the elastic body is hardly displaced while the tape measure is used and it can be attached through an easy-to-mold integral molding with an aim to attach the elastic member over the wide range of the tape measure case. SOLUTION: When a case 2 of a tape measure 1 is formed through integral molding, an optimal quantity of recessed parts 3 are formed at a specified part of the case 2, and an elastic member 5 is inserted into the recessed part 3 and the entire body is integrally molded. Thus, a leg part 51, where the molded elastic member 5 is inserted into the recessed part 3, is made to be an anchor, preventing horizontal displacement and peeling of the elastic member 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of mounting an elastic member integrally molded with a tape measure case on the case in order to buffer the shock caused by dropping.

[0002]

[Prior Art and Problems] Conventionally, a tape measure case is often made of a resin material having excellent moldability, and is molded into a unique form of each maker by various molding machines, and a memory is printed inside for measurement. A rotary drum, in which the tape is wound in a biased state, is rotatably supported by a shaft standing on the inner wall of the case to form an automatic winding type tape measure. Also, in the case, there is also a lock mechanism part that temporarily holds the pulled out tape together with this rotating drum,
The operation lever is provided so as to project from the case. Further, a locking hook is provided at the tip of the tape.

The tape measure may be dropped or hit during the measuring operation, and the case or the operating lever of the lock mechanism provided so as to project from the case or the tip of the tape. The locking hooks provided on the are always at risk of breakage. For this reason, recently, tape measures with improved impact resistance that can withstand impacts such as dropping have come out. This is because elastic members are attached to the corners of the case by adhesion, etc. A molded elastic member covers a part of the case, and the elastic member tries to mitigate or absorb the impact caused by dropping.

In the case of the one attached by the above-mentioned adhesion, if the end portion is peeled off, the peeling will spread more and more,
Finally, the elastic member is removed from the case and the case cannot be protected. Further, this is insufficient for protecting the case because the elastic member is attached only to the corner portion of the case. If the case is covered with the tape measure, the elastic member may be displaced during use, or the elastic member may come off the case depending on the handling of the tape measure, which causes an inconvenience to interfere with the measurement work. In addition, there is a gap between the elastic member and the case, and the impact is not so much mitigated.

[0005]

[Object] The present invention has been made in view of the above problems, and when an elastic member is attached to a wide area of a case to improve the protection of the case, the elastic body does not shift during use of a tape measure. It is another object of the present invention to provide a method for attaching an elastic member to a tape measure case that can be attached by integral molding, which is easy to form.

[0006]

SUMMARY OF THE INVENTION The gist of the present invention is a method of integrally mounting an elastic member on a tape measure case for absorbing a shock caused by a drop or the like,
A method of attaching an elastic member to a tape measure case, characterized in that a proper number of recesses are formed in a predetermined portion of the case, and a part of the elastic member is put into the recess and integrally molded.

To explain the present invention in more detail, a tape measure to which the present invention is applied has a case made of a resin or / and metal material suitably formed in a desired shape, and has a measuring tape around it. Depending on the structure of the rotary drum wound around, the tape measure can be a manual winding type or an automatic winding type. In the manual winding type tape measure, a rotating drum is rotatably supported by a shaft erected in the case, and a winding handle facing the outside of the case is connected to the rotating drum to rotate the handle in the winding direction. To wind the tape. The tape goes in and out of a predetermined part of the case.

In the automatic winding type tape measure, the rotating drum is rotatably supported by the shaft erected in the case, and a coil-shaped winding spring is provided inside the rotating drum for urging and mounting the tape. As the tape is pulled out, a winding force is accumulated in the winding spring, and when the tape is wound, the tape is released so that the tape is wound into the case by the force of the winding spring.

The tape enters and exits through the tape entrance and exit below the front wall of the case, and the locking hook provided at the tip of the tape prevents the tape from being drawn into the case.
Depending on the tape measure, a cushioning member may be provided facing the tape entrance / exit to reduce the impact of the locking hook at the tip of the tape when the tape is wound up, or a locking mechanism that temporarily holds the pulled-out tape. Some brake pieces and an operating lever for the brake piece are provided. In addition, there are some that are provided with a portable member such as a strap or a belt hook for carrying the tape measure.

[0012] A case of a tape measure (manual wind-up type / automatic wind-up type) having the above-mentioned structure is integrally formed with an elastic member for cushioning a shock caused by dropping of the tape measure. is there. The recess is preferably formed on the tape measure case at the same time as the case is integrally molded, but it may be formed on the integrally molded case by an appropriate method afterwards, or by a suitable method.

The elastic member may be integrally molded by newly molding the elastic member after first integrally molding the case having the recess. However, the elastic member may be continuously molded after the case is integrally molded. May be integrally molded and may be appropriately formed in a desired manner. The tape measure case includes a two-piece case consisting of a pair of half cases divided from the center to the left and right, and a three-piece case consisting of left and right side walls and a central circumscribing wall. It is better to integrally mold each piece.

Any elastic member may be used as long as it can absorb or absorb the impact caused by a drop or the like, and it may be molded into a shape advantageous for absorbing or absorbing the impact. For example, it may be approximately flush with the surface of the case, may be projected from the surface, or may be a combination of both, and may be appropriately selected depending on the size of the case, the material, the usage form, and the like. As a specific material of the elastic member, materials such as elastomer, rubber, silicone, and high density sponge may be used alone or in appropriate combination.

In the integral molding, a suitable known technique may be used, and the material used may be in a form (powder / liquid, etc.) suitable for the molding technique. Then, when integrally molding, the molding method is such that a material having a predetermined shape (powder / liquid, etc.) of the elastic member can enter into a concave portion appropriately formed on the case surface, and the concave portion has a predetermined shape of the elastic member. The material (powder / liquid, etc.) can be inserted into the shape (dimensions / diameter, etc.), that is, the shape that can be filled, and an appropriate number of them are arranged at intervals so that the elastic member does not move during use of the tape measure. Must.

The concrete shape of the recess is a cylinder
It is a prism or a triangular prism, and the bottom corners thereof are rounded, or the bottom is substantially hemispherical, or a cone, a pyramid, or a triangular pyramid. And it is desirable to make the recess as deep as possible. Of course, other shapes may be used as long as the elastic member can be filled with a material of a predetermined shape (powder / liquid, etc.), and specifically, the recess may be formed into a groove having an appropriate length. Good. The recesses may be formed on the case surface regularly or irregularly, that is, without being restricted by the direction of the grooves or the order of the grooves.

Further, the above-mentioned recess may be replaced with a through hole, that is, an appropriate number of through holes are formed in a predetermined portion of the case, and an elastic member is inserted into the through hole to integrally form the through hole. Good. The through hole must also be formed in such a shape that a material of a predetermined form (powder / liquid, etc.) of the elastic member can enter, that is, a fillable form. For example, the opening shape is, for example, a substantially circular shape, a square shape, a substantially triangular shape, a rectangular shape, or a substantially star shape, but is not limited thereto. Although the depth of penetration of the material into the through hole is not particularly limited, the material is appropriately inserted into a part or all of the through hole in consideration of the displacement movement of the elastic member during use of the tape measure.

When the material is to be inserted into all of the through holes, the material is inserted until it protrudes from the through hole,
It is preferable to mold the protruding portion into an appropriate shape so as to be wider than at least the hole diameter of the through hole. For example,
It is better to mold it so that it looks like the head of a nail.
Alternatively, the inner end of the case of the through-hole may be expanded into a fan-shaped cross section so that the material can enter at least until it reaches the fan-shaped portion.

[0017]

As described above, according to the wearing method of the present invention, since the recess is formed in the case and a part of the elastic member is put into the recess and integrally molded, the molded elastic member enters the recess. Anchor action occurs at the part that is in contact, that is, the leg part. As a result, when a lateral force, that is, a force to move the elastic member is applied to the elastic member, the legs of the elastic member, which are scattered in the action range of the elastic member, are stopped from moving by the peripheral wall of the recess, and the elastic member is moved. Overcome the force to move. Further, even when a force is applied to peel off the elastic member, the legs scattered around the point of action of the force of the elastic member move in the direction of the elastic member lifted by the force to peel off. By being pulled, it is pressed against the peripheral wall of the recess to stop its movement, and overcomes the force of peeling the elastic member.

[0018]

1 is a perspective view of a case provided with a recess according to the present invention, in which 1 is a tape measure, 2 is a case, and 21 is a rotary drum to be installed. It is the tape entrance / exit of the wound tape 6.
Reference numeral 3 denotes a recess formed in a predetermined portion of the case 2, that is, a portion where the elastic member 5 is mounted.

FIG. 2 is a cross-sectional perspective view of the case recess.
FIG. 1A shows the recess 3 formed in the case 2 in a substantially cylindrical shape, and FIG. 1B shows the recess 3 formed in the case 2.
Indicates a groove shape. 22 is an inner wall of the case 2.

FIG. 3 is a view showing a state inside the recess of the elastic member. Since the leg portion 51 of the elastic member 5 is contained in the recess portion 3 formed in the case 2, the leg portion 51 has an anchoring action. Occurs. As a result, when a lateral force, that is, a force to move the elastic member 5 is applied to the elastic member 5, the movement of the leg portion 51 of the elastic member 5 is stopped by the peripheral wall of the recess 3.
As a result, the displacement of the elastic member 5 is prevented. Further, when a peeling force is applied to the elastic member 5, the leg portion 51 of the elastic member 5 is attracted to one side by the peeling force and is pressed against the peripheral wall of the concave portion 3 to stop its movement. As a result, the elastic member 5
Peeling is prevented.

FIG. 4 is a view showing a state inside the through hole of the elastic member, in which the elastic member 5 is inserted into the through hole 4 formed in the case 2.
Since the leg portion 51 is included, the anchor action is generated in the leg portion 51. (A) In the figure, the leg 5 is formed in the through hole 4 having the same diameter.
1 shows that the leg portion 51 has entered the through hole 4 having the same diameter in a protruding state, and the protruding portion is formed wider than the hole diameter. FIG. 3C shows a case where the end of the inner wall 22 of the case 2 of the through hole 4 is expanded in a fan shape in cross section, and the leg portion 51 enters the fan shape part.

As a result, (a) figure, (b) figure, (c)
In the figure, when a lateral force, that is, a force for moving the elastic member 5 is applied, the leg portion 51 of the elastic member 5 is stopped by the peripheral wall of the through hole 4, and as a result, the displacement of the elastic member 5 is displaced. Is prevented. Further, in FIG. 7A, when a peeling force is applied to the elastic member 5, the leg portion 51 of the elastic member 5 is pulled to one side by the peeling force and the through hole 4 is formed.
The movement of the elastic member 5 is stopped by being pressed against the peripheral wall of the elastic member 5, and as a result, peeling of the elastic member 5 is prevented. And (b) figure
In the diagram (c), the end portion of the leg portion 51 in the inner wall 22 direction is the through hole 4
Since it is wider than the hole diameter of the elastic member 5,
Is physically prevented from peeling.

FIG. 5 is a perspective view showing a tape measure case to which an elastic member is attached. 1 is a tape measure, 2 is a case, and 21 is a tape inlet / outlet of a tape 6 wound on a rotary drum to be installed. Reference numeral 5 is an elastic member attached to the surface of the case 2 on the recess 3 by inserting the leg portion 51 into the recess 3 formed in the case 2. Reference numeral 6 is a measuring tape, 61 is a locking piece for hooking the tape 6, and 7 is an operating lever for braking the tape 6. Although not shown, a strap for carrying a tape measure is appropriately provided at the rear of the case 2.

[0024]

As described above, according to the wearing method of the present invention, since the recess is formed in the case and a part of the elastic member is put into the recess and integrally molded, the recess of the molded elastic member is inserted. The area where the elastic member is formed serves as an anchor, which prevents lateral displacement of the elastic member and has excellent peeling resistance. Also,
This mounting method can improve the integration of the case and the elastic member, and can be easily molded even when the elastic member is mounted over a wide area of the case by using integral molding. You can

Further, by improving the integration of the case and the elastic member, there is no gap between the elastic body and the case, and the impact force at the time of dropping can be absorbed and absorbed by the elastic body, and the impact force is also applied to the case. It can be dispersed and the drop resistance is further improved. Further, by improving the integration of the case and the elastic member, the elastic member attached to the case also serves as an anti-slip, which improves the handleability of the tape measure, and this also prevents the tape measure from falling. Also connected,
It is also possible to improve safety during measurement work.

[Brief description of drawings]

FIG. 1 is a perspective view of a case provided with a recess according to the present invention.

FIG. 2 is a sectional perspective view of a case recess.

FIG. 3 is a view showing a state inside a concave portion of an elastic member.

FIG. 4 is a view showing a state inside a through hole of an elastic member.

FIG. 5 is a perspective view showing a tape measure case to which an elastic member is attached.

[Explanation of symbols]

1-Tape measure, 2-Case, 21-Tape entrance / exit, 22-Inner wall, 3-Recess, 4-Through hole, 5-Elastic member, 51-Leg, 6-Tape, 61-Locking piece, 7-Operating lever

Claims (6)

[Claims] 1. The tape measure case absorbs the impact of dropping
It is a method to wear elastic members for molding by integral molding.
Form an appropriate number of recesses in the prescribed parts of the case, and
Characterized by putting a part of the elastic member in the part and integrally molding
Method of Attaching Elastic Member to Tape Measure Case 2. The method for attaching an elastic member to a tape measure case according to claim 1, wherein the opening of the recess is substantially circular. 3. The method for attaching an elastic member to a tape measure case according to claim 1, wherein the recess is a groove having an appropriate length. 4. The tape measure case absorbs the impact of dropping
It is a method to wear elastic members for molding by integral molding.
The appropriate number of through-holes at the prescribed parts of the case, and
It is possible to insert a part of the elastic member into the through hole and integrally mold it.
Method of attaching characteristic elastic member to tape measure case 5. Insert the material until it protrudes from the through hole.
The protruding part is at least wider than the hole diameter of the through hole.
The tape measure of the elastic member according to claim 4, characterized in that
How to wear the case 6. The case inner end of the through hole has a fan-shaped cross section.
Unfold and reach at least the fan-shaped part of the material
The tape measure of the elastic member according to claim 4, wherein
How to wear the case