JP3616653B2 - Protective face for safety cap - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a protective surface such as a disaster prevention surface or a heat-resistant surface that is used by being attached to a safety cap.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a protective surface provided with means for attaching to a hook-shaped safety cap and a face body made of transparent plastic or the like is well known. This protective surface is sometimes referred to as a disaster prevention surface when it protects the operator's face from flying dust or the like, and is sometimes referred to as a heat insulating surface when it protects the face from a heat source. By the way, since the user of the protective surface sometimes needs to work without seeing through the face body, for example, in Japanese Utility Model Laid-Open No. 57-116723, the face body can be moved over the head of the safety cap.
[0003]
[Problems to be solved by the invention]
In the technique of the above publication, the rear end portion of the support arm extending backward from the face body is rotatably attached to the means for attaching to the safety cap by a bolt and a spring washer. When it is moved to, it can be stopped at a required position. However, this technique may cause an inconvenient problem that the bolt is loosened while repeating the movement of the face piece, and the face piece intended to be stopped slides down during the work.
[0004]
Therefore, the present invention has an object to solve the above-mentioned problem by engaging a gear integral with the face body with an occlusion means provided in a means for attaching to the safety cap so that the face body can be stopped at a required position. .
[0005]
[Means for Solving the Problems]
The present invention uses the following means to solve the above problems.
[0006]
In the present invention, a face body for covering the face of the wearer of the safety cap, a support arm extending rearward from both sides of the face body, and the support arm is pivotally supported at the rear end thereof so as to be pivoted under the safety cap. It is assumed that the protective surface for the safety cap is composed of attachment means capable of clamping the edge portion from the inner and outer surfaces.
[0007]
In such assumption, provided the outer wall inner opposing the mounting means, made to allow clamping the security cap and the inner wall screwed a bolt fastening from outside on the outer wall by the said bolt, rotating in the same axis as the bolt A gear portion to be provided on a support arm , and the gear portion is housed inside a housing joined to the outside of the outer wall so as to be slidably in contact with the housing from the inside, and the tightening bolt is attached to the outside of the housing. The face body that opens and closes in correspondence with the pitch of the gear portion can be made stationary at each pitch by extending the gear portion and engaging the gear portion with the spring-biased engagement means on the attachment means side. This is a feature of the present invention.
[0008]
In a preferred embodiment of the invention, the support arm is pivotally supported by the bolt. Further, the gear portion is covered and protected together with the occlusion means. Furthermore, positioning means for enabling attachment of the support arm in a required direction is provided in the gear portion.
[0009]
[Action]
In the protective surface configured in this manner, the gear portion provided on the support arm rotates as the face body is opened and closed. The gear portion engages with the occlusal means under the bias of the spring, and the face body that opens and closes according to the pitch of the peaks or valleys can be stationary for each pitch.
[0010]
【Example】
The details of the protective surface according to the present invention will be described with reference to the accompanying drawings.
[0011]
FIG. 1 is a perspective view of a protective surface 6 attached to a safety cap 5. The protective surface 6 includes a surface body 7 made of transparent plastic, a band-shaped member 9 made of a light metal such as plastic or aluminum attached to the upper edge of the surface body 7 with a screw 8, and an attachment member to the lower edge of the safety cap 5 10 and. The safety cap 5 is of a bowl shape made of plastic and has a cord on both sides, but the illustration thereof is omitted.
[0012]
In the protective surface 6, the belt-like member 9 has a reinforcing portion 11 that abuts on the face body 7 and increases its rigidity, and a support arm portion 12 that extends rearward from the side edge of the face body 7. The rear end portion is pivotally supported by the fastening bolt 13 of the mounting member 10 so as to be rotatable. Due to this pivotal support, the face body 7 which is in a substantially vertical state in the drawing is opened and stopped in units of 45 ° in the overhead direction of the safety cap 5 as indicated by virtual lines 7A and 7B, and closed in the opposite direction. Can do. The details of the opening / closing mechanism are as described later.
[0013]
FIG. 2 shows a main part of the view taken along line 2-2 in FIG. 1, and particularly shows details of the attachment member 10 and the support arm part 12, and the safety cap 5 is shown by a virtual line.
[0014]
The mounting member 10 includes a U-shaped bracket 15, a tightening bolt 13, and a housing 17. The U-shaped bracket 15 is formed between the inner and outer walls 18 and 19 facing each other with the safety cap 5 interposed therebetween, and both the walls 18 and 19. The outer wall 19 has a screw hole 20. The bolt 13 is screwed into the screw hole 20, and has an operation knob 21 at the outer end and a presser 22 fitted into the inner end so as to be rotatable in the circumferential direction. When the lower edge portion of the protective cap 5 is inserted into the U-shaped groove of the U-shaped metal fitting 15 and the bolt 13 is tightened, the protective cap 5 is held between the inner wall 18 and the pressing element 22, and the protective surface 6 is secured to the protective cap 5. Can be installed on. The housing 17 is an inverted U-shaped plastic or metal member in the figure and is located outside the outer wall 19 and can be attached to and detached from the outer wall 19 by appropriate joining means such as bolts, adhesive, and welding, although not shown. Or it is impossible to join. At the lower part of the housing 17, there is a small chamber 27 defined by a part of the peripheral wall 25A and the partition 26, and a leaf spring 28 is housed therein.
[0015]
A gear member 30 is integrally attached to an end portion of the support arm portion 12 and rotates around the same axis as that of the bolt 13. The gear member 30 has a through hole 31 at the center of the diameter, and has a gear portion 32, a cylindrical portion 33, and a prismatic portion 34 arranged in order from the inner end to the outer end on the outer periphery. The bolt 13 is inserted into the through hole 31 so as to be rotatable, and the prismatic part 34 is inserted into the square hole 35 provided at the end of the support arm part 12 so as not to be rotatable, and at the outer end part thereof is used for retaining. An E-ring 37 is fitted (see also FIG. 1). The gear portion 32 is inside the housing 17 and meshes with the leaf spring 28, and the column portion 33 is provided on the side wall 25 </ b> B of the housing 17 and has a transparent center that is the same as the screw hole 20 of the U-shaped metal fitting 15. The hole 39 is rotatably inserted. The side surface 32 </ b> A of the gear portion 32 is slidably in contact with the side wall 25 </ b> B of the housing 17 from the inside, and the gear member 30 is not pulled out from the through hole 39. The support arm 12 can be configured such that the gear member 30 is in sliding contact with the bolt 13 or is rotated in contact with the peripheral wall of the through-hole 39 instead of the bolt 13. It is in. In any sliding contact, the support arm 12 rotates about the same axis as the bolt 13, but when the sliding contact is made with the bolt 13, the gear member 30 is inserted so that no force is applied to it. Loosen.
[0016]
FIGS. 3A and 3B are main parts of the view taken along the line 3-3 in FIG. 2, wherein FIG. 3A shows the gear portion 32 when the face piece 7 is closed, and FIG. And the positional relationship between the leaf springs 28. However, in the figure, illustration of the face piece 7 is omitted, and only the support arm portion 12 is indicated by an imaginary line, and the housing 17 shows an internal state thereof. In (a) of the figure, the leaf spring 28 has a symmetrical mountain shape, and its top portion 28A is an engagement portion with the gear portion 32, and comes out of the slit 26A of the partition 26 and engages with the gear portion 32. ing. The gear portion 32 has a crest 32A and a trough 32B arranged at a pitch of 45 °, and the shape of the trough 32B substantially matches that of the top portion 28A of the leaf spring 28. When the top is closed, the top 28A is engaged with the valley 32B and is stationary, and does not open easily. However, when the face piece 7 is moved in the overhead direction against the leaf spring 28, the peak 32A is engaged with the adjacent valley 32B after pressing the leaf spring 28 as shown in (b), and the face piece 7 opens 45 °. Stand still. The face body 7 is further opened by 45 ° and stops still. However, when the face body 7 is more than that, the face body 7 comes into contact with the top of the safety cap 5 and stops, or a stopper means (not shown) that can be appropriately employed on the protective face 6 acts. Stop. Further, as shown in FIG. 1, it is possible to provide stopper means for preventing the face 7 from being lowered even when a strong force is applied when the face 7 is in a closed state. As these stopper means, for example, a part of the belt-like member 9 can be brought into contact with the safety cap 5, or a part of the gear part 32 can be made particularly large to prevent the top part 28A of the leaf spring 28 from passing through the part. can do. The valleys 32B can be arranged at a required pitch, and the pitch need not be uniform.
[0017]
In addition, it is preferable that the face body 7 is substantially perpendicular to the substantially horizontal lower edge of the safety cap 5 when the face body 7 is closed. As shown in FIG. If the trough 32B of the gear portion 32 and the top portion 28A of the leaf spring 28 are engaged with each other and the support arm 12 is attached to the prism portion 34, the protective cap 5 of the face piece 7 is secured by the prism portion 34. The mounting angle with respect to can be regulated. Further, although the support arm 12 may be rotated around an axis different from that of the bolt 13, it is easy to reduce the size of the mounting member 10 by using the same axis as the bolt 13.
[0018]
【The invention's effect】
In the protective surface according to the present invention, the face body to be opened and closed can be made stationary by the gear portion and the spring means engaged with the gear portion, and the bolt for attaching the protective surface slides gently or not at all. Therefore, the bolt does not loosen even if the opening and closing are repeated, and the force required for opening and closing is always constant by the spring means, so that the opening and closing operation is smooth.
[0019]
Since the support arm is pivotally supported by the bolt, the mounting member can be easily downsized.
[0020]
Since the gear part and the spring means are covered with a housing, even if a protective surface is used in a dusty work place, it is easy to maintain smooth opening and closing of the face body without biting the gear part. Become.
[0021]
Since the prismatic portion is provided at the outer end portion of the gear member, when the portion is used as a positioning means, it becomes easy to attach the face piece vertically to the safety cap.
[Brief description of the drawings]
FIG. 1 is a perspective view of a protective surface attached to a safety cap.
FIG. 2 is a main part of the view taken along line 2-2 in FIG.
3A and 3B are main parts of the view taken along the line 3-3 in FIG. 2, in which FIG. 3A shows a state in which the face piece is closed, and FIG. 3B shows a state in which the face piece is slightly opened.
[Explanation of symbols]
5 Safety cap 6 Protective surface 7 Face body 10 Attachment means (attachment member)
12 Support arm (support arm)
13 Clamping bolt 18 Inner wall 19 Outer wall 28 Occlusal means (leaf spring)
32 Gear part 34 Positioning means (square column part)

Claims (4)

A face body for covering the face of the wearer of the safety cap, a support arm extending rearward from both sides of the face body, the support arm pivotally supported at the rear end thereof, and the lower edge of the safety hat being A protective surface for a safety cap comprising attachment means that can be clamped from inside and outside,
Gears said mounting means providing the outer wall inner facing each other, by said said inner wall screwed a clamping bolt from outside the bolt in the outer wall made enabling sandwich the security cap, rotates with the bolt and the same axis A portion is provided on the support arm , and the gear portion is accommodated inside the housing joined to the outside of the outer wall so as to be in slidable contact with the housing from the inside, and the tightening bolt is placed outside the housing. By extending and engaging the gear part with the spring-biased engagement means on the attachment means side, the face body that opens and closes according to the pitch of the gear part can be made stationary at each pitch. The protective surface according to claim 1. The protective surface according to claim 1, wherein the support arm is pivotally supported by the bolt. The protective surface according to claim 1, wherein the gear portion is covered and protected together with the engagement means. The protective surface according to claim 1, wherein positioning means for allowing the support arm to be mounted in a required direction is provided on the gear portion.

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