JPS64191B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes a pair of arms fixed to the head so as to be able to pivot between an open state and a closed state, and a pair of arms arranged between the arms to rotate the arms toward the open state. The present invention relates to a tool having an elastic device adapted to bias.

Such tools are commonly used as hand tools, ie, tools for applying forces or cutting workpieces, and are also used as mechanisms in assemblies.

The object of the invention is to provide a tool of simple unitary construction, which can be manufactured economically, for example by molding or extrusion.

Federal Republic of Germany Patent Publication DE-A-
No. 2,419,818 discloses a pair of arms fixed to a first head so as to be pivotable between an open state and a closed state, and said arms adapted to bias the arms toward the open state. an elastic device between the first head and the first head, the arm and the elastic device being integrally formed in a single piece of elastic material; The elastic device extends in a divergent shape and includes a pair of beams, each beam extending from a portion of the arm farther from the first head inwardly between the arms toward the first head. extending to a second head, said beams being of monolithic construction adapted to progressively engage each other along the length of said beams, starting from said second head, as said arms approach movement; Tools are shown.

According to the present invention, in the above-mentioned tool, the first head includes a mandibular surface and the second head includes a maxillary surface, and when motion is given to the arm, the mandibular surface and the maxillary of monolithic construction, characterized in that the surfaces engage the workpiece together, and the beams engage each other in the longitudinal direction of the beams in a forward motion from the second head when motion is imparted to the arms. Tools will be provided.

The tool according to the invention is suitably molded from a high load-bearing strength elastomeric plastic material.

Next, embodiments of the present invention will be described with reference to the drawings.

The tool of FIGS. 1 to 4 comprises a first head 2 for contouring a mandibular surface 6 and a second head 4 for contouring a maxillary surface 7 spaced below said surface 6. The tool of FIGS. The mandibular surface 6 is
It is formed in the top part of a cavity defined between the side walls 8, 10 in said first head 2, which is adapted to receive the second head 4 slidingly therein.

A pair of arms 12, 14 extend downwardly from the first head 2 in a divergent manner on either side of the cavity. arm 1
The first part of 2, 14 is the thick lower end part 12A, 1
The thickness gradually decreases toward 4A. The lower end portion 1
2A and 14A form handles that can be grasped by hand in the usual manner.

The second head 4 is supported by a pair of arch-shaped elastic beams 16, 18 from the lower ends of the arms 12, 14, and the beams 16, 18 are convex toward each other, and upper end portions 16B, 18B are very close to each other. Moreover, it converges upward so as to be continuous with the second head 4.

Heads 2 and 4, arms 12 and 14, and beams 16 and 1
8 is integrally formed as a single structure from an elastic plastic material with high yield strength, preferably by molding or extrusion. A number of tools can be formed by a single molding or extrusion process to have a cross-section corresponding to the elevational view of FIG. It will be understood that it can be obtained as a tool.

In operation, when the handle portions 12A, 14A are closed, the thinner portions of the arms 12, 14 flex and pivot about the first head 2. Arc-shaped beam 16,1
8 are progressively engaged at the upper portions 16B, 18B and are mutually supported, effectively increasing in length in the direction of arrow 20 and causing the second head 4 to join the first head 4, as shown in FIG. It is driven into the cavity of the section 2 and towards the mandibular surface 6.

The side walls 8, 10 of the cavity and the engaging portions of the beams 16, 18 resist lateral displacement of the second head 4 and
A work piece (not shown) that maintains the orientation of the head 4 can be engaged between the jaw surfaces 6, 7 and compressed.
Along with this, the beams 16 and 18 are subjected to a compression action, and the arms 12 and 14 are subjected to a tension action. The resiliency of the beams 16, 18 and arms 12, 14 allows the tool to open when the handle is released.

In the alternative embodiment of the tool illustrated in FIGS. 5 and 6, the same reference numerals have been used for parts similar to those described with respect to FIGS. 1-4. The second head 4 has a cylindrical recess or socket 22 on the bottom surface between the beams 16 and 18;
The socket 22 passes through the second head 4 transversely to its line of action. Socket 22 has a narrow opening between beams 16, 18 to accommodate a complementary cylindrical head 26A of straight rail 26. The rail 26 projects downwardly between the beams 16, 18 and is reinforced by a transverse flange 28 on the back side of the tool.

During operation of such a tool, beams 16, 18 move toward rail 26 as handles 12, 14 are closed.
flattened on top. Rail 26 Beams 16, 18
It acts to support.

In the embodiments of FIGS. 7 and 8, the first
The same reference numerals have been used for parts similar to those described with reference to FIGS. It slidably passes through the recess 2A on the back side of the head 2.

The extension body 4A has a third head 4B at its upper end, and the third head 4B has a mandibular surface 4C that is spaced apart from and opposite the jaw surface 2B on the upper side of the first head 2.

In the embodiment of FIGS. 7 and 8, the workpiece can be gripped between the jaw faces 6, 7 when the tool is closed, and between the jaw faces 4C, 2B when the tool handle is opened.

In the embodiment of FIGS. 9 and 10, the same reference numbers are used here again for parts similar to those described with reference to FIGS.
The head 2 has an upright hole in which the lower open end of the cylinder 30 is fixed. An upright bar 36 is fixed to the second head 4 and extends coaxially through the lower end of the cylinder 30. A washer-type piston 38 is fixed to the upper end of the rod 36 and the upper closed end 32 of the cylinder 30 has an outlet 34.

When the tool is actuated, the piston 38 inside the cylinder
reciprocates, compression and suction occur alternately in the cylinder and outlet 34, and the beam 1
The elasticity of 6, 18 causes the tool to open and the piston 38 to move downward.

[Brief explanation of the drawing]

FIG. 1 is an elevational view of a tool for applying a force between a pair of jaws in an open state, and FIG. 2 is a drawing similar to FIG. 1, but an elevational view of the tool in a partially closed state. , Figure 3 is a side view of the tool in Figure 1, and Figure 4 is a side view of the tool in Figure 1.
The figure is a cross-sectional view taken along line 4-4 in Figure 1, Figure 5 is a cross-sectional view of the tool of the second embodiment mounted on the support rail, and Figure 6 is a fragment taken along line 6-6 in Figure 5. 7 is a partial elevational view of the head of the tool of the third embodiment, FIG. 8 is a fragmentary sectional view taken along line 8-8 in FIG. 7, and FIG. 9 is a fourth embodiment. FIG. 10 is a partial elevational view similar to FIG. 9, but with the tool in a partially closed position. 2...First head, 4...Second head, 4A...Extension body, 4B...Third head, 6...Recess, 8...Recess, 12, 14...Arm, 16, 18 ... Hari, 2
2... recess, 26... rail, 36... extension body.

Claims (1)

[Claims] 1. A pair of arms 12, 14 fixed to the first head so as to be pivotable between an open state and a closed state;
The tool has elastic devices 16 and 18 between the arms configured to bias the arms toward an open state, and the first head 2, the arms 12 and 14, and the elastic devices consisting of a unitary structure molded in one piece of elastic material, the arms 12, 14 extending in a divergent manner from the first head 2, and the elastic device containing a pair of beams 16, 18; Each beam 16, 18 extends from a portion of the arm 12, 14 farther from the first head 2 to the arm 12, 14.
a second head 4 with the space facing inward toward the first head 2;
The beams 16, 18 extend up to the arm 1.
2, 14, the first head 2 gradually engages each other along the length of the beam, starting from the second head 4; The mandibular surface 6 is connected to the second head 4
each contain a maxillary surface 7, and when said arms 12, 14 are given movement, said mandibular surface and said maxillary surface both engage the work piece, said beams 16, 18
A tool of integral construction, characterized in that when motion is applied to the beams 2 and 14, the second head 4 engages each other in a forward direction in the longitudinal direction of the beam. 2. In the tool according to claim 1, the beams 16 and 18 are connected to each of the arms 1.
A tool of integral structure, characterized by being curved away from 2 and 14 into a bow shape. 3. In the tool according to claim 1 or 2, the arms 12, 14 are
A tool of one-piece construction, characterized in that it can flex with respect to said first head 2 and performs a pivoting action by the bending of said arms 12, 14 upon mutual closure. 4. In the tool according to any one of claims 1 to 3, the mandibular surface 6 of the first head 2 is located between the arms 12 and 14.
It is located in the cavity provided by the side walls 8, 10 formed in the head 2, said cavity being located in the cavity provided by said arms 12, 14.
A tool of integral construction, wherein the tool slidably receives the second head when the tool is closed. 5. In the tool according to any one of claims 1 to 4, the second head 4 has a recess 22 between the beams 16 and 18, and the recess 22 is located between the beams 16 and 18. A support rail 26 having a narrow downward entrance between 16 and 18 and an enlarged head 26A that engages said recess 22 extends between said arms 12 and 14, and upon closure of said arms 12 and 14 from each other; A tool of one-piece construction, characterized in that said beams 16, 18 are adapted to flatten progressively on either side of said rail 26. 6. In the tool according to claim 4, the second head 4 is slidably overlapped with the first head 2, and has a space from the first head 2 on a side far from the second head 4. A tool of integral construction, characterized in that it comprises an extension 4A having a third spaced apart head 4B. 7. Tool according to claim 4, characterized in that the second head 4 comprises an extension 36 passing through an opening 30 in the first head 2. .